User:Abyssal/List of the prehistoric life of Argentina

This list of the prehistoric life of Alabama contains the various prehistoric life-forms whose fossilized remains have been reported from within the country of Alabama.

Precambrian
The Paleobiology Database records no known occurrences of Precambrian fossils in Alabama.

Paleozoic

 * † Acadagnostus
 * † Acadagnostus argentinus
 * † Acanthocrinus
 * † Acanthocrinus benedettoi
 * † Acanthopecten
 * † Acanthopecten jaguelensis
 * † Acanthoscapha
 * † Acanthoscapha sp.
 * † Acanthotoechia
 * † Acanthotoechia sp.
 * † Acerocarina – tentative report
 * † Acerocarina
 * † Acerocarina glaber
 * † Acerocarina sp.
 * † Aclisina – tentative report
 * † Aclisina sp.
 * † Acodus
 * † Acodus sp.
 * † Acontiodus
 * † Acontiodus sp.
 * † Acrograptus
 * † Acrograptus sp.
 * † Actinopteria
 * † Actinopteria eschwegei
 * † Actinopteria modesta
 * † Acuticloudina – type locality for genus
 * † Acuticloudina borreloi
 * † Adelograptus
 * † Adelograptus sp.
 * † Aegiromena
 * † Aegiromena glacialis
 * † Agnostus
 * † Agnostus microcephalus
 * † Ahtiella
 * † Ahtiella argentina
 * † Ahtiella sp.
 * † Allorisma
 * † Allorisma inflectoventris – type locality for species
 * † Allosaccus
 * † Allosaccus sp.
 * † Allosacus
 * † Allosacus sp.
 * † Amaurotoma
 * † Amaurotoma sp.
 * † Amorphognathus
 * † Amorphognathus sp.
 * † Amorphognathus superbus
 * † Amosina – tentative report
 * † Amosina
 * † Amosina fuertensis
 * † Amosina paolae – type locality for species
 * † Amosina paolae
 * † Amosina pediculorum – type locality for species
 * † Amosina pediculorum
 * † Amosina sp.
 * † Amphigraptus
 * † Amphigraptus sp.
 * † Amphilichas
 * † Amphilichas sp.
 * † Amplexograptus – tentative report
 * † Amplexograptus
 * † Amplexograptus sp.
 * † Amplexopora
 * † Amplexopora sp.
 * † Ampyx – tentative report
 * † Ampyx
 * † Ampyx reyesi
 * † Ampyx sp.
 * † Amsassia
 * † Amsassia argentina – type locality for species
 * † Anabaia – tentative report
 * † Anabaia – type locality for speciesinformal
 * † Anabaia sp.
 * † Anacaenaspis
 * † Anacaenaspis sp.
 * † Ananaspis
 * † Ananaspis sp.
 * † Anapiculatisporites – tentative report
 * † Anapiculatisporites rallus
 * † Anapiculatisporites variornatus
 * † Anaspyroceras
 * † Anaspyroceras sp.
 * † Anchoramena – tentative report
 * † Anchoramena
 * † Anchoramena sp.
 * † Ancillotoechia
 * † Ancillotoechia cooperensis
 * † Andenothyone – type locality for genus
 * † Andenothyone gondwanensis – type locality for species
 * † Andinacaste
 * † Andinacaste espejensis – type locality for species
 * † Anebolithus – tentative report
 * † Anebolithus sp.
 * † Angelina
 * † Angelina hyeronimi – or unidentified related form
 * † Angelina hyeronimi – or unidentified comparable form
 * † Angelina hyeronimi
 * † Angelina hyeronomi
 * † Angelina kayseri
 * † Angelina punctolineata
 * † Angelina sp.
 * † Angelina sp. Ainformal
 * † Angelinoceras
 * † Angelinoceras sp.
 * † Anisochilina
 * † Anisochilina sp.
 * † Anisograptus
 * † Anisograptus flexuosus – or unidentified comparable form
 * † Anisograptus richardsoni – or unidentified comparable form
 * † Anisopleurella
 * † Anisopleurella sp.
 * † Annamitella
 * † Annamitella sp.
 * † Annamitella tellecheai
 * † Annularia
 * † Annularia sp. 1informal
 * † Anoplia
 * † Anoplia azucenae – type locality for species
 * † Anoplia sp.
 * † Ansella
 * † Ansella sp.
 * † Anthaspidella
 * † Anthaspidella alveola – type locality for species
 * † Anthaspidella annulata – type locality for species
 * † Anthaspidella inornata – type locality for species
 * † Anthaspidella sp.
 * † Anthracoblattina
 * † Anthracoblattina archangelskyi – type locality for species
 * † Anthracoleda
 * † Anthracoleda minuta
 * † Aostipora
 * † Aostipora sanjuanensis – type locality for species
 * † Aparchites
 * † Aparchites sp.
 * † Apatokephalus
 * † Apatokephalus exiguus
 * † Apatokephalus serratus
 * † Apatokephalus sp.
 * † Aphanaia
 * † Aphanaia orbirugata – type locality for species
 * † Aphanaia orbirugata
 * † Aphanomena
 * † Aphanomena chilcaensis – type locality for species
 * † Aphanomena chilcaensis
 * † Aphelognathus
 * † Aphelognathus sp.
 * † Apheoorthis
 * † Apheoorthis samensis – or unidentified comparable form
 * † Apiculatasporites
 * † Apiculatasporites caperatus
 * † Apiculiretusispora
 * † Apiculiretusispora papillata
 * † Apiculiretusispora sp.informal
 * † Apiculiretusispora sparsa
 * † Apurocrinus
 * † Apurocrinus sp.
 * † Aquilarella
 * † Aquilarella tapiai – type locality for species
 * † Araiocaris
 * † Araiocaris sp.
 * † Araiopleura
 * † Araiopleura reticulata
 * † Araiopleura sp.
 * † Arancibia
 * † Arancibia sp.
 * † Arberia
 * † Arberia sp. 1informal
 * † Archaeorthis
 * † Archaeorthis sp.
 * † Archaeoscyphia
 * † Archaeoscyphia minganensis
 * † Archaeoscyphia nana – type locality for species
 * † Archaeoscyphia nana
 * † Archaeoscyphia pulchra
 * † Archaeoscyphia sp.
 * † Archaeoscyphia tenuis – type locality for species
 * † Archaeoscyphia tenuis
 * † Archaeosigillaria
 * † Archaeosigillaria conferta
 * † Archangelskyblatta – type locality for genus
 * † Archangelskyblatta vishniakovae – type locality for species
 * † Arenorthis
 * † Arenorthis sp.
 * † Argentinala – type locality for genus
 * † Argentinala cristinae – type locality for species
 * † Argentinaster
 * † Argentinaster bodenbenderi
 * † Argentinodictya
 * † Argentinodictya lenticulata
 * † Argentinonarkemina
 * † Argentinonarkemina amosi – type locality for species
 * † Asaphellus – tentative report
 * † Asaphellus
 * † Asaphellus aspinus – or unidentified comparable form
 * † Asaphellus caramarcensis
 * † Asaphellus catamarcensis
 * † Asaphellus catamarcensus
 * † Asaphellus convexus – type locality for species
 * † Asaphellus jujuanus
 * † Asaphellus riojanus
 * † Asaphellus sp.
 * † Asaphopsis
 * † Asaphopsis intermedia
 * † Asaphus
 * † Asaphus sp.
 * † Asketochiton – type locality for genus
 * † Asketochiton chubutensis – type locality for species
 * † Aspidograptus – tentative report
 * † Aspidograptus
 * † Aspidograptus implicatus – or unidentified comparable form
 * † Aspidograptus minor – or unidentified comparable form
 * † Astartella
 * † Astartella pusilla – type locality for species
 * † Asterotheca
 * † Asterotheca feruglioi
 * † Asterotheca sp. 1informal
 * † Asterotheca sp. 2informal
 * † Asterotheca sp. 3informal
 * † Astraborthis
 * † Astraborthis quebradensis
 * † Aulocopium
 * † Aulocopium sanjuanensis – type locality for species
 * † Aulocopium sanjuanensis
 * † Aulocopium sp.
 * † Australina
 * † Australina acutiplicata
 * † Australina jachalensis
 * † Australina sp.
 * † Australoacaste
 * † Australoacaste palpalensis
 * † Australobollia – type locality for genus
 * † Australobollia fuertensis – type locality for species
 * † Australocoelia
 * † Australocoelia intermedia – type locality for species
 * † Australoharpes
 * † Australoharpes precordilleranus
 * † Australonucula
 * † Australonucula mesocarinata
 * † Australopyge
 * † Australopyge acanthara
 * † Australopyge russoi
 * † Australopyge sp.
 * † Australospirifer
 * † Australospirifer antarcticus
 * † Australostrophia
 * † Australostrophia penoensis – type locality for species
 * † Aviculopecten
 * † Aviculopecten – type locality for speciesinformal
 * † Aviculopecten sp.
 * † Azurduya
 * † Azurduya chavelensis
 * † Azurduya cingolanii
 * † Baldiscella
 * † Baldiscella sp.
 * † Baltograptus
 * † Baltograptus deflexus
 * † Baltograptus spp.
 * † Baltonoidus
 * † Baltonoidus sp.
 * † Barakaria
 * † Barakaria sp. 1informal
 * † Barnescoceras
 * † Barnescoceras sp.
 * † Barrealispira
 * † Barrealispira tupensis – or unidentified related form
 * † Basilicus
 * † Basilicus carinata
 * † Basilicus sp.
 * † Batostoma
 * † Batostoma lanensis
 * † Batostoma sheldonensis
 * † Bellerophon – tentative report
 * † Bellerophon sp.
 * † Belloceras
 * † Belloceras sp.
 * † Beltella
 * † Beltella sp.
 * † Beltella ulrichi
 * † Benedettia
 * † Benedettia sp.
 * † Bergstroemognathus
 * † Bergstroemognathus sp.
 * † Bernardite
 * † Bernardite sp.
 * † Bicuspina
 * † Bicuspina sp.
 * † Bienvillia
 * † Bienvillia pirquinensis
 * † Bienvillia sp.
 * † Bienvillia tetragonalis
 * † Birmanites
 * † Birmanites sp.
 * † Bodenbenderia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Bodenbenderia
 * † Bodenbenderia longifroms – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Bodenbenderia longifrons
 * † Borestus
 * † Borestus lunatus – type locality for species
 * † Botrychiopsis
 * † Botrychiopsis sp. 1informal
 * † Botrychiopsis weissiana
 * † Boucotia
 * † Boucotia argentina
 * † Bowerophylloides
 * † Bowerophylloides mendozaensis
 * † Brackebuschia
 * † Brackebuschia acheila
 * † Branisaspis
 * † Branisaspis sp.
 * † Brasiliocladus
 * † Brasiliocladus sp. 1informal
 * † Braulioceras – type locality for genus
 * † Braulioceras sanjuanense – type locality for species
 * † Breyeria
 * † Breyeria brauckmanni – type locality for species
 * † Broeggeria
 * † Broeggeria sp.
 * † Brongniartella
 * † Brongniartella sp.
 * † Brooksella
 * † Brooksella sp.
 * † Bryograptus
 * † Bryograptus sp.
 * † Bucanella
 * † Bucanella sp.
 * † Bucania
 * † Bucania sp.
 * † Bumastus
 * † Bumastus bellmanni
 * † Buriadia
 * † Buriadia sp. 1informal
 * † Buriadia sp. 2informal
 * † Buttsia
 * † Buttsia australis – type locality for species
 * † Bystromena
 * † Bystromena sp.
 * † Bythopora
 * † Bythopora dendrina
 * † Cadomia
 * † Cadomia sp.
 * † Calamospora
 * † Calamospora multiplicata
 * † Calamospora sp.informal
 * † Calathium
 * † Calathium sp.
 * † Callitomaria
 * † Callitomaria tepuelensis – type locality for species
 * † Callitomaria tepuelensis
 * † Callograptus
 * † Callograptus salteri – or unidentified comparable form
 * † Calmoniinae
 * † Calmoniinae sp.
 * † Calycocoelia
 * † Calycocoelia perforata – type locality for species
 * † Calycocoelia perforata
 * † Calycocoelia sp.
 * † Calymene
 * † Calymene ferrifera
 * † Calymene vallecitoensis
 * † Calymenella – tentative report
 * † Calymenella
 * † Calymenella sp.
 * † Calymenella zaplensis
 * † Camerella
 * † Camerella sp.
 * † Campylorthis
 * † Campylorthis sp.
 * † Carolinites
 * † Carolinites sp.
 * † Caryocaris
 * † Caryocaris sp.
 * † Castellaroina
 * † Castellaroina fascifer
 * † Castellaroina sp.
 * † Catamarcaia
 * † Catamarcaia chaschuilensis
 * † Catamarcaia sp.
 * † Ceratocara
 * † Ceratocara argentina – type locality for species
 * † Ceratocara argentina
 * † Ceratocara sp.
 * † Ceratopyge
 * † Ceratopyge forficuloides
 * † Ceraurinella
 * † Ceraurinella zhoui
 * † Chamishaella
 * † Chamishaella sp.
 * † Chancelloria
 * † Chancelloria eros
 * † Chancelloria sp.
 * † Chaniella – type locality for genus
 * † Chaniella pascuali – type locality for species
 * † Chasmatopora
 * † Chasmatopora rossae
 * † Cheirurus – tentative report
 * † Cheirurus
 * † Cheirurus sp.
 * † Chilcaia – type locality for genus
 * † Chilcaia
 * † Chilcaia bimuralis – type locality for species
 * † Chilcaia sp.
 * † Chionoconus
 * † Chionoconus sp.
 * † Chiropteris
 * † Chiropteris sp. 1informal
 * † Chomatopyge
 * † Chomatopyge canasi – type locality for species
 * † Chomatopyge canasi
 * † Chonetes
 * † Chonetes sp.
 * † Chonostrophiella
 * † Chonostrophiella elenae – type locality for species
 * † Ciceragnostus
 * † Ciceragnostus iruyensis
 * † Ciceragnostus sp.
 * † Cienagomya – type locality for genus
 * † Cienagomya
 * † Cienagomya bidentata – type locality for species
 * † Cienagomya bidentata
 * † Cimmeriella
 * † Cimmeriella willi – type locality for species
 * † Cimmeriella willi
 * † Cinclidonema
 * † Cinclidonema sp.
 * † Cladochonus – tentative report
 * † Cladochonus sp.
 * † Clarkeia
 * † Clarkeia antisiensis
 * † Clarkeia ovalis
 * † Clarkeia sp. – type locality for species
 * † Clarkeia tambolarensis
 * † Clarkoceras
 * † Clarkoceras sp.
 * † Clavagnostus
 * † Clavagnostus calensis
 * † Clavagnostus repandus
 * † Clavohamulus
 * † Clavohamulus hintzei
 * † Clavohamulus sp.
 * † Cleionychia
 * † Cleionychia sp.
 * † Cliftonia
 * † Cliftonia oxoplecioides
 * † Climacograptus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Climacograptus
 * † Climacograptus bicornis
 * † Climacograptus innotatus
 * † Climacograptus minutus – or unidentified comparable form
 * † Climacograptus rectangularis – or unidentified comparable form
 * † Climacograptus sp.
 * † Clinoclimacograptus
 * † Clinoclimacograptus sp.
 * † Clitambonites – tentative report
 * † Clitambonites sp.
 * † Clonograptus
 * † Clonograptus sp.
 * † Clonograptus spp.
 * † Clonograptus tenellus – or unidentified comparable form
 * † Cochlioceras
 * † Cochlioceras avus
 * † Cochlioceras sp.
 * † Coelonella
 * † Coelonella sp.
 * † Coelospira
 * † Coelospira dominans
 * † Coelospira extensa
 * † Coelospira sp.
 * † Colpocoryphe
 * † Colpocoryphe sp.
 * † Colpocoryphoides
 * † Colpocoryphoides trapezoidalis
 * † Colpomya – tentative report
 * † Colpomya
 * † Colpomya elongata – type locality for species
 * † Colpomya sp.
 * † Concavodonta
 * † Concavodonta ovalis – type locality for species
 * † Concavoleda – type locality for genus
 * † Concavoleda braulense – type locality for species
 * † Conochitina
 * † Conochitina sp.
 * † Conophrys
 * † Conophrys minutula
 * † Conophrys sp.
 * † Constellaria
 * † Constellaria varia
 * † Conularia
 * † Conularia sp.
 * † Coolinia
 * † Coolinia sp.
 * † Cordaicarpus
 * † Cordaicarpus sp. 1informal
 * † Cordaites
 * † Cordaites sp. 1informal
 * † Cordatomyonia
 * † Cordatomyonia umangoensis – type locality for species
 * † Cordatomyonia umangoensis
 * † Cordylodus – or unidentified comparable form
 * † Cordylodus
 * † Cordylodus angulatus
 * † Cordylodus intermedius
 * † Cordylodus lindstromi
 * † Cordylodus proavus
 * † Cordylodus sp.
 * † Cornuodus
 * † Cornuodus sp.
 * † Coronalosia
 * † Coronalosia argentinensis – type locality for species
 * † Corrugatagnostus
 * † Corrugatagnostus sp.
 * † Corynepteris
 * † Corynepteris sp. 1informal
 * † Corynoides
 * † Corynoides sp.
 * † Cosmogoniophorina
 * † Cosmogoniophorina sp.
 * † Costaledopsis
 * † Costaledopsis sp.
 * † Costatumulus
 * † Costatumulus amosi
 * † Costatumulus farleyensis
 * † Costatumulus sp.
 * † Costatumulus sp. Ainformal
 * † Costatumulus sp. Binformal
 * † Costatumulus sp. Cinformal
 * † Coxiconchia
 * † Coxiconchia babini – type locality for species
 * † Coxiconchia sp.
 * † Craniops
 * † Craniops sp.
 * † Cristodus
 * † Cristodus sp. – tentative report
 * † Crossiskenidium – tentative report
 * † Crossiskenidium stelzneri
 * † Crurithyris – tentative report
 * † Crurithyris
 * † Crurithyris roxoi
 * † Crurithyris sp.
 * † Cryptograptus
 * † Cryptograptus sp.
 * † Cryptonella
 * † Cryptonella baini
 * † Cryptophyllus
 * † Cryptophyllus sp.
 * † Ctenodonta
 * † Ctenodonta sp.
 * † Ctenodonta spp.
 * † Cuneamya
 * † Cuneamya sp.
 * † Curticia
 * † Curticia sp.
 * † Curtoceras
 * † Curtoceras sp.
 * † Cuyopsis – type locality for genus
 * † Cuyopsis symmetricus – type locality for species
 * † Cyathochitina
 * † Cyathochitina sp.
 * † Cyathophycus
 * † Cyathophycus extendis – type locality for species
 * † Cycloconcha
 * † Cycloconcha sp.
 * † Cyclogranisporites
 * † Cyclogranisporites sp.informal
 * † Cyclopyge – tentative report
 * † Cyclopyge sp.
 * † Cyclostomiceras
 * † Cyclostomiceras sp.
 * † Cymatospira
 * † Cymatospira montfortianus – or unidentified comparable form
 * † Cypricardella
 * † Cypricardella sp.
 * † Cypricardinia – tentative report
 * † Cypricardinia sp. nov.informal
 * † Cyptendoceras
 * † Cyptendoceras sp.
 * † Cyrtodontula
 * † Cyrtodontula sp.
 * † Cyrtonoidus
 * † Cyrtonoidus sp.
 * † Cyrtonotella
 * † Cyrtonotella sp.
 * † Cyrtospirifer
 * † Cyrtospirifer sp.
 * † Dactylogonia
 * † Dactylogonia sp.
 * † Dactylotreta
 * † Dactylotreta sanjuanensis – type locality for species
 * † Dalmanella
 * † Dalmanella sp.
 * † Dalmanella testudinaria – or unidentified related form
 * † Dalmanella testudinaria
 * † Dalmanites
 * † Dalmanites sp.
 * † Dalmanites sudamericanus – or unidentified comparable form
 * † Dalmanites sudamericanus
 * † Dalmanites transglabelaris
 * † Dalmanitina
 * † Dalmanitina sp.
 * † Dalmanitina sudamericana
 * † Dalmanitina tellecheai
 * † Dasometopus
 * † Dasometopus marginatus – type locality for species
 * † Dawsonoceras
 * † Dawsonoceras sp.
 * † Deceptrix
 * † Deceptrix elongata
 * † Deceptrix jachalensis
 * † Deceptrix subtrigonalis
 * † Dedzetina – tentative report
 * † Dedzetina
 * † Dedzetina silurica – type locality for species
 * † Dedzetina silurica
 * † Dedzetina sp.
 * † Dedzetina sp. nov.informal
 * † Degamella
 * † Degamella famatinensis – type locality for species
 * † Dekayia
 * † Dekayia sp.
 * † Deltacare
 * † Deltacare prosops
 * † Deltopecten
 * † Deltopecten harringtoni – type locality for species
 * † Desmochitina
 * † Desmochitina sp.
 * † Desmorthis – tentative report
 * † Desmorthis
 * † Desmorthis bifurcata
 * † Desmorthis sp.
 * † Diacalymene
 * † Diacalymene subandina
 * † Diagoniella
 * † Diagoniella sp.
 * † Diaphpterum – type locality for genus
 * † Diaphpterum rasnitsyni – type locality for species
 * † Dicellograptus
 * † Dicellograptus sp.
 * † Dichelepyge
 * † Dichelepyge pascuali
 * † Dichograptus
 * † Dichograptus sp.
 * † Dichotomopteris
 * † Dichotomopteris sp. 1informal
 * † Dicranograptus
 * † Dicranograptus ramosus – or unidentified related form
 * † Dicranograptus sp.
 * † Dictyonema
 * † Dictyonema flabelliforme
 * † Dictyonema sp.
 * † Didymograptus
 * † Didymograptus bifidus
 * † Didymograptus sp.
 * † Dinorthis
 * † Dinorthis sp.
 * † Diplagnostus
 * † Diplagnostus indianus
 * † Diplagnostus planicauda
 * † Dipleurodonta
 * † Dipleurodonta sp.
 * † Diploclema
 * † Diploclema trentonense
 * † Diplograptus – tentative report
 * † Diplograptus
 * † Diplograptus sp.
 * † Distodus
 * † Distodus sp.
 * † Dizeugotheca
 * † Dizeugotheca sp. 1informal
 * † Dizeugotheca sp. 2informal
 * † Dizeugotheca sp. 3informal
 * † Dolerasaphus – tentative report
 * † Dolerasaphus
 * † Dolerasaphus laevis
 * † Dolerasaphus sp.
 * † Dolerobasilicus – tentative report
 * † Dolerobasilicus sp.
 * † Dolerorthis
 * † Dolerorthis plicata
 * † Drabovia – tentative report
 * † Drabovia
 * † Drabovia sp.
 * † Drabovia undulata – type locality for species
 * † Drabovia undulata
 * † Drepanodus
 * † Drepanodus sp.
 * † Drepanoistodus
 * † Drepanoistodus sp.
 * † Dualina
 * † Dualina sp.
 * † Dubhglasina
 * † Dubhglasina depressus
 * † Dunbarella
 * † Dunbarella sp. – type locality for species
 * † Dyschrestia – tentative report
 * † Dyschrestia sp.
 * † Ectenonotus
 * † Ectenonotus sp.
 * † Edmondia
 * † Edmondia sp.
 * † Emiliodonta – type locality for genus
 * † Emiliodonta cuerdai – type locality for species
 * † Enallopora
 * † Enallopora exigua
 * † Encrinuroides
 * † Encrinuroides edseli – type locality for species
 * † Encrinuroides edseli
 * † Encrinurus – tentative report
 * † Encrinurus
 * † Encrinurus niquivilensis
 * † Encrinurus sp.
 * † Eohomalonotus
 * † Eohomalonotus villicumensis
 * † Eoleperditia
 * † Eoleperditia sp.
 * † Eoorthis – tentative report
 * † Eoorthis
 * † Eoorthis sp.
 * † Eoplacognathus
 * † Eoplacognathus sp.
 * † Eoplacognathus suecicus
 * † Eoplectodonta
 * † Eoplectodonta duplicata
 * † Eopteria
 * † Eopteria agustini – type locality for species
 * † Eoscheiella – type locality for genus
 * † Eoscheiella concava – type locality for species
 * † Eosomichelinoceras
 * † Eosomichelinoceras baldisii – type locality for species
 * † Eosomichelinoceras baldisii
 * † Eospongia
 * † Eospongia sp.
 * † Eostropheodonta
 * † Eostropheodonta hirnantensis – or unidentified related form
 * † Eostropheodonta mullochensis – or unidentified related form
 * † Eostropheodonta sp.
 * † Eremopteris
 * † Eremopteris sp. 1informal
 * † Erismodus
 * † Erismodus sp.
 * † Erraticodon
 * † Erraticodon sp.
 * † Etheripecten – tentative report
 * † Etheripecten
 * † Etheripecten saraviae
 * † Eucerospermum
 * † Eucerospermum sp. 1informal
 * † Eucharodus
 * † Eucharodus sp.
 * † Euchondria
 * † Euchondria sabattini – type locality for species
 * † Euchondria sabattiniae
 * † Euchondria sabattinii
 * † Eugeropteron – type locality for genus
 * † Eugeropteron lunatum – type locality for species
 * † Euorthisina – tentative report
 * † Euorthisina nazarenensis – type locality for species
 * † Euphemites
 * † Euphemites chubutensis
 * † Euphemites sp.
 * † Eurydesma
 * † Eurydesma altum
 * † Eurydesma cordatum
 * † Eurydesma hobartense
 * † Eurydesma mytiloides
 * † Euryphyllum
 * † Euryphyllum sp. 1informal
 * † Fahraeosodus
 * † Fahraeosodus sp.
 * † Falodus
 * † Falodus sp.
 * † Famatinadonta – type locality for genus
 * † Famatinadonta gonzaloi – type locality for species
 * † Famatinolithus
 * † Famatinolithus jujuyensis
 * † Famatinolithus noticus
 * † Famatinolithus sp.
 * † Famatinorthis
 * † Famatinorthis sp.
 * † Famatinorthis turneri
 * † Fardenia
 * † Fardenia filistriata
 * † Fardenia sp.
 * † Favosites
 * † Favosites sp.
 * † Fenestella
 * † Fenestella sp.
 * † Ferugliocladus
 * † Ferugliocladus sp. 1informal
 * † Ffynnonia
 * † Ffynnonia famatinensis
 * † Finkelnburgia
 * † Finkelnburgia sp.
 * † Flexicalymene – tentative report
 * † Flexicalymene
 * † Flexicalymene sp.
 * † Flexicalymene vaccarii – type locality for species
 * † Fremontella
 * † Fremontella inopinata
 * † Furcaster
 * † Furcaster separatus – type locality for species
 * † Gallagnostus
 * † Gallagnostus bolivanus
 * † Gallagnostus bolivianus
 * † Gallagnostus sp.
 * † Gangamopteris
 * † Gangamopteris sp. 1informal
 * † Gangamopteris sp. 2informal
 * † Gangamopteris sp. 3informal
 * † Gangamopteris sp. 4informal
 * † Gangshanoceras
 * † Gangshanoceras sp.
 * † Gangshanoceras villicumense – type locality for species
 * † Gangshanoceras villicumense
 * † Gatosella – type locality for genus
 * † Gatosella
 * † Gatosella muricata – type locality for species
 * † Gatosella muricata
 * † Geminospora – tentative report
 * † Geminospora microglanulata
 * † Geniculograptus – tentative report
 * † Geniculograptus sp.
 * † Genoites
 * † Genoites sp. 1informal
 * † Geragnostus
 * † Geragnostus callaveiformis
 * † Geragnostus calviformis
 * † Geragnostus hoeki
 * † Geragnostus maurii
 * † Geragnostus mesossii
 * † Geragnostus micropeltis
 * † Geragnostus nesossii
 * † Geragnostus neumanni
 * † Geragnostus sp.
 * † Geragnostus tilcuyensis
 * † Geragnostus vilonii
 * † Geropteron – type locality for genus
 * † Geropteron arcuatum – type locality for species
 * † Ginkgoites
 * † Ginkgoites sp. 1informal
 * † Ginkgophyllum
 * † Ginkgophyllum diazii
 * † Ginkgophyllum sp. 1informal
 * † Girvanella
 * † Girvanella sp.
 * † Glabrocingulum
 * † Glabrocingulum sp.
 * † Glaphyrites
 * † Glaphyrites sp.
 * † Glossites
 * † Glossites depressus – or unidentified comparable form
 * † Glossograptus
 * † Glossograptus sp.
 * † Glossopteris
 * † Glossopteris sp. 1informal
 * † Glossopteris sp. 2informal
 * † Glossopteris sp. 3informal
 * † Glossopteris sp. 4informal
 * † Glossopteris sp. 5informal
 * † Glossopteris sp. 6informal
 * † Glossopteris sp. 7informal
 * † Glossopteris sp. 8informal
 * † Glossopteris sp. 9informal
 * † Glyptagnostus
 * † Glyptagnostus reticulatus
 * † Glyptoconus
 * † Glyptoconus sp.
 * † Glyptograptus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Glyptograptus
 * † Glyptograptus sp.
 * † Glyptorthis
 * † Glyptorthis sp.
 * † Glyptorthis vidari
 * † Gondwanorthis
 * † Gondwanorthis calderensis – type locality for species
 * † Gondwanorthis calderensis
 * † Goniophora
 * † Goniophora sp.
 * † Goniophorina – tentative report
 * † Goniophorina
 * † Goniophorina tenuicostata – or unidentified comparable form
 * † Goniophorina tenuicostata
 * † Grammysioidea
 * † Grammysioidea capricornus
 * † Granulatisporites – tentative report
 * † Granulatisporites
 * † Granulatisporites sp.informal
 * † Granulatisporites varigranifer
 * † Guandacolithus
 * † Guandacolithus furquei
 * † Guandacolithus sp.
 * † Gymnagnostus
 * † Gymnagnostus bolivianus
 * † Gymnagnostus perinflatus
 * † Hallograptus
 * † Hallograptus sp.
 * † Hallopora
 * † Hallopora sp.
 * † Hapalopleura
 * † Hapalopleura clavata
 * † Hapalopleura longicornis – or unidentified related form
 * † Hapalopleura longirachis – type locality for species
 * † Hapalopleura sp.
 * † Haplopleura
 * † Haplopleura longicornis
 * † Harpides
 * † Harpides neogaeus
 * † Harringtonacaste
 * † Harringtonacaste harringtoni
 * † Harringtonia – tentative report
 * † Harringtonia sp.
 * † Harringtonina
 * † Harringtonina acutiplicata
 * † Harringtonina sp.
 * † Hebertella
 * † Hebertella sp.
 * † Heliomeroides
 * † Heliomeroides evitti
 * † Hemiconcavodonta – type locality for genus
 * † Hemiconcavodonta minuta – type locality for species
 * † Hemiconcavodonta sp.
 * † Hemsiella
 * † Hemsiella helgae – type locality for species
 * † Hesperonomia
 * † Hesperonomia orientalis
 * † Hesperonomia sp.
 * † Hesperonomiella
 * † Hesperonomiella arcuata
 * † Hesperonomiella sp.
 * † Hesperorthis
 * † Hesperorthis sp.
 * † Heteropecten
 * † Heteropecten cortignasi – type locality for species
 * † Heteropecten paranaensis
 * † Heteropecten sp.
 * † Heterorthella
 * † Heterorthella precordillerana – type locality for species
 * † Heterorthella precordillerana
 * † Heterorthella zaplensis
 * † Hillyardina – tentative report
 * † Hillyardina sp.
 * † Hindella
 * † Hindella crassa – or unidentified comparable form
 * † Hindella crassa
 * † Hirnantia
 * † Hirnantia sagittifera
 * † Histidella
 * † Histidella sp.
 * † Hoekaspis
 * † Hoekaspis diablensis
 * † Hoekaspis megacantha
 * † Hoekaspis schlagintweiti
 * † Hoekaspis sp.
 * † Holia
 * † Holia sp.
 * † Holmograptus
 * † Holmograptus sp.
 * † Holtedahlina – tentative report
 * † Holtedahlina sp.
 * † Homagnostus
 * † Homagnostus pehuenchensis
 * † Homalopteon – or unidentified comparable form
 * † Homalopteon sp.
 * † Homoeospira
 * † Homoeospira antiqua – type locality for species
 * † Homoeospira antiqua
 * † Homoeospira carinata – type locality for species
 * † Homoeospira carinata
 * † Homotrypa
 * † Homotrypa obliqua
 * † Homotrypa sp.
 * † Hostinella
 * † Hostinella sp.
 * † Howellella – tentative report
 * † Howellella
 * † Howellella sp.
 * † Howellites
 * † Howellites macrostoma – or unidentified comparable form
 * † Huacoella
 * † Huacoella sp.
 * † Huarpeana
 * † Huarpeana sp.
 * † Hudsonospongia
 * † Hudsonospongia cyclostoma
 * † Hudsonospongia irregularis
 * † Hudsonospongia porosa
 * † Hudsonospongia sp.
 * † Hudsonospongia talacastensis – type locality for species
 * † Hungioides
 * † Hungioides sp.
 * † Hybodus – or unidentified comparable form
 * † Hybodus sp.
 * † Hyolithes
 * † Hyolithes amosi
 * † Hyolithes sp.
 * † Hypagnostus
 * † Hypagnostus huilichensis
 * † Hypagnostus parvifrons
 * † Hypermecaspis
 * † Hypermecaspis armata
 * † Hypermecaspis inermis
 * † Hypermecaspis inflecta
 * † Hypermecaspis sp.
 * † Icriodella
 * † Icriodella sp.
 * † Idiostrophia
 * † Idiostrophia sp.
 * † Illaenopsis – tentative report
 * † Illaenopsis
 * † Illaenopsis sp. – type locality for species
 * † Illaenopsis sp.
 * † Illaenopsis stenorhachis
 * † Illaenus – tentative report
 * † Illaenus
 * † Illaenus sp.
 * † Imbricatia – tentative report
 * † Imbricatia sp.
 * † Incaia
 * † Incaia sp.
 * † Incorthis
 * † Incorthis sp.
 * † Incrassospongia
 * † Incrassospongia ramis – type locality for species
 * † Incrassospongia sp.
 * † Intihuarella – type locality for genus
 * † Intihuarella simplicidentata – type locality for species
 * † Inversella
 * † Inversella arancibiai
 * † Inversella sp.
 * † Iridistrophia
 * † Iridistrophia sp.
 * † Irmosporites
 * † Irmosporites circumpolaris
 * † Isidrophyton
 * † Isidrophyton iniguezii
 * † Isochilina – tentative report
 * † Isochilina sp.
 * † Isograptus
 * † Isograptus sp.
 * † Isorthis – tentative report
 * † Isorthis
 * † Isorthis cuyanum – type locality for species
 * † Isorthis cuyanum
 * † Isorthis megamyaria – type locality for species
 * † Isorthis sp.
 * † Istragraptus
 * † Istragraptus sp.
 * † Jakutoproductus
 * † Jakutoproductus sabattiniae – type locality for species
 * † Jakutoproductus sabattiniae
 * † Juanognathus
 * † Juanognathus sp.
 * † Jujuyaspis
 * † Jujuyaspis keideli
 * † Jujuyaspis sp.
 * † Jujuyops
 * † Jujuyops nonoctubrensis
 * † Jumadontus
 * † Jumadontus sp.
 * † Jumudontus
 * † Jumudontus sp.
 * † Kainella – tentative report
 * † Kainella
 * † Kainella conica
 * † Kainella meridionalis – or unidentified comparable form
 * † Kainella meridionalis
 * † Kainella sp.
 * † Kainellidae – tentative report
 * † Kainellidae sp.
 * † Kayseraspis
 * † Kayseraspis asaphelloides
 * † Kayseraspis brackebuschi
 * † Kayseraspis sp.
 * † Keidelia
 * † Keidelia macrophthalma
 * † Kentronetes
 * † Kentronetes giolittii – type locality for species
 * † Kentronetes ortegae – type locality for species
 * † Kentronetes vallensis – type locality for species
 * † Kentronetes variabilis – type locality for species
 * † Keslingiella – tentative report
 * † Keslingiella teresae – type locality for species
 * † Kettneraspis
 * † Kettneraspis sp.
 * † Kirchnerala – type locality for genus
 * † Kirchnerala treintamil – type locality for species
 * † Kitakamithyris
 * † Kitakamithyris septata
 * † Kiwetinokia
 * † Kiwetinokia utahensis – tentative report
 * † Kochiproductus
 * † Kochiproductus riojanus
 * † Kochiproductus sp.
 * † Kockelella
 * † Kockelella variabilis
 * † Kootenia
 * † Kootenia sp.
 * † Kormagnostus – tentative report
 * † Kormagnostus
 * † Kormagnostus beltensis
 * † Kormagnostus seclusus
 * † Kvania – tentative report
 * † Kvania
 * † Kvania azulpampensis – type locality for species
 * † Kvania azulpampensis
 * † Kvania lariensis – type locality for species
 * † Kvania lariensis
 * † Kvania primigenia – type locality for species
 * † Kvania primigenia
 * † Lagenochitina
 * † Lagenochitina sp.
 * † Lamottopora
 * † Lamottopora multispinosa – type locality for species
 * † Lampazarorthis
 * † Lampazarorthis bifurcata
 * † Lampazarorthis brachymyaria – type locality for species
 * † Lampazarorthis brachymyaria
 * † Lanceolatus
 * † Lanceolatus sp. 1informal
 * † Lapazites
 * † Lapazites trinodis – type locality for species
 * † Larispongia – type locality for genus
 * † Larispongia magdalenae – type locality for species
 * † Lasaguaditas – type locality for genus
 * † Lasaguaditas
 * † Lasaguaditas oweni – type locality for species
 * † Lasaguaditas oweni
 * † Lasarchopyge – type locality for genus
 * † Lasarchopyge
 * † Lasarchopyge benedettoi – type locality for species
 * † Lasarchopyge benedettoi
 * † Lasarchopyge correae – type locality for species
 * † Lasarchopyge correae
 * † Lasarchopyge sp. Ainformal
 * † Lasiograptus
 * † Lasiograptus sp.
 * † Leangella
 * † Leangella america – type locality for species
 * † Leangella mutabilis – type locality for species
 * † Leangella mutabilis
 * † Leangella sp.
 * † Leiagnostus – tentative report
 * † Leiagnostus
 * † Leiagnostus perinflatus
 * † Leiagnostus sp.
 * † Leiagnostus turgidulus
 * † Leiorhynchus
 * † Leiorhynchus cuyana
 * † Leiostegium
 * † Leiostegium sp.
 * † Leiotriletes
 * † Leiotriletes gracilis
 * † Leiotriletes petilus
 * † Leiotriletes politus
 * † Leiotriletes sp. Ainformal
 * † Leiotriletes sp. Binformal
 * † Lejopyge
 * † Lejopyge laevigata
 * † Lenodus
 * † Lenodus sp.
 * † Leonaspis
 * † Leonaspis crenata
 * † Leonaspis sp.
 * † Leptaena
 * † Leptaena argentina
 * † Leptaena sp.
 * † Leptella
 * † Leptella rugosa
 * † Leptella sp.
 * † Leptellina – tentative report
 * † Leptellina
 * † Leptellina sp.
 * † Leptobenthos – type locality for genus
 * † Leptobenthos roartei – type locality for species
 * † Leptochirognathus
 * † Leptochirognathus sp.
 * † Leptocoelia
 * † Leptocoelia nunezi
 * † Leptodesma
 * † Leptodesma bonaerensis – type locality for species
 * † Leptodesma dutoiti – type locality for species
 * † Leptodesma dutoiti
 * † Leptodesma potens – or unidentified comparable form
 * † Leptodesma variabilis
 * † Leptograptus
 * † Leptograptus sp.
 * † Leptoplastides – tentative report
 * † Leptoplastides
 * † Leptoplastides mariana
 * † Leptoplastides marianus
 * † Leptoplastides sp.
 * † Leptostrophia – or unidentified comparable form
 * † Leptostrophia
 * † Leptostrophia sp.
 * † Lesserorthis – type locality for genus
 * † Lesserorthis havliceki – type locality for species
 * † Levipustula
 * † Levipustula levis
 * † Levisaspis
 * † Levisaspis sp.
 * † Lichas
 * † Lichas argentina – type locality for species
 * † Lichas laciniatus – or unidentified comparable form
 * † Lingula
 * † Lingula sp.
 * † Lingulella – tentative report
 * † Lingulella
 * † Lingulella sp.
 * † Lipanella – type locality for genus
 * † Lipanella purmamarcensis – type locality for species
 * † Lipanorthis – type locality for genus
 * † Lipanorthis
 * † Lipanorthis andinus – type locality for species
 * † Lipanorthis andinus
 * † Lipanorthis santalaurae – type locality for species
 * † Lipanorthis santalaurae
 * † Lissochonetes – tentative report
 * † Lissochonetes
 * † Lissochonetes sp.
 * † Lissocoelia
 * † Lissocoelia sp.
 * † Lituites
 * † Lituites sp.
 * † Lloydia
 * † Lloydia douglasi
 * † Lloydia sp.
 * † Lodesia
 * † Lodesia sp.
 * † Loganograptus
 * † Loganograptus sp.
 * † Lomaella – type locality for genus
 * † Lomaella primoris – type locality for species
 * † Lomaella sanjuanina – type locality for species
 * † Lonchodomas
 * † Lonchodomas sp.
 * † Lonchodomas suriensis
 * † Longiscula – tentative report
 * † Longiscula sp.
 * † Lophotriletes
 * † Lophotriletes sp.informal
 * † Lotagnostus
 * † Lotagnostus lasherensis
 * † Lotagnostus llamaensis
 * † Lotagnostus peladensis – tentative report
 * † Lotagnostus peladensis
 * † Lotagnostus shergoldi
 * † Lotagnostus sp.
 * † Loxonema
 * † Loxonema sp.
 * † Lycopodiopsis
 * † Lycopodiopsis sp. 1informal
 * † Machairagnostus
 * † Machairagnostus sp.
 * † Machairagnostus tmetus – or unidentified comparable form
 * † Machairagnostus tmetus
 * † Maclurites
 * † Maclurites sp.
 * † Macrocystella
 * † Macrocystella sp.
 * † Macrogrammus
 * † Macrogrammus pengi
 * † Macrogrammus rafi
 * † Malayaspira
 * † Malayaspira rugosa – or unidentified related form
 * † Manocrinus
 * † Manocrinus maldigitatus
 * † Marginura
 * † Marginura yachalensis
 * † Megadesmus – tentative report
 * † Megadesmus sp.
 * † Megalaspidella
 * † Megalaspidella kayseri
 * † Megalaspidella sp.
 * † Megalaspis – tentative report
 * † Megalaspis
 * † Megalaspis pugiocauda
 * † Megalaspis saltaensis
 * † Megarachne – type locality for genus
 * † Megarachne servinei – type locality for species
 * † Megistaspis
 * † Megistaspis kayseri
 * † Megistaspis sp.
 * † Megistophyllum
 * † Megistophyllum sp. 1informal
 * † Mekynophrys
 * † Mekynophrys nanna
 * † Mendacella
 * † Mendacella sp.
 * † Mendolaspis
 * † Mendolaspis salagastensis
 * † Mendolaspis sp.
 * † Merismopteria
 * † Merismopteria salinensis
 * † Meristella
 * † Meristella precordillerana
 * † Merlinia
 * † Merlinia sp.
 * † Metabolograptus
 * † Metabolograptus persculptus
 * † Metapilekia – tentative report
 * † Metapilekia
 * † Metapilekia bilirata
 * † Metaplasia – tentative report
 * † Metaplasia
 * † Metaplasia baldisi
 * † Metaplasia lomaensis
 * † Metaplasia sp.
 * † Micragnostus – tentative report
 * † Micragnostus
 * † Micragnostus calviformis
 * † Micragnostus chiushuensis
 * † Micragnostus sp.
 * † Micragnostus vilonii
 * † Micromitra
 * † Micromitra sp.
 * † Mimella
 * † Mimella sp.
 * † Miraspis
 * † Miraspis sp.
 * † Modiolopsis
 * † Modiolopsis sp.
 * † Modiolus
 * † Modiolus sp.
 * † Modiomorpha
 * † Modiomorpha sp.
 * † Mollesella
 * † Mollesella planiventralis
 * † Molongella
 * † Molongella keideli – type locality for species
 * † Monocostodus
 * † Monocostodus servierensis
 * † Monograptus
 * † Monograptus sp.
 * † Monorthis
 * † Monorthis sp.
 * † Monorthis transversa
 * † Monticulipora
 * † Monticulipora sp.
 * † Mooreoceras
 * † Mooreoceras zalazarense
 * † Mourlonia
 * † Mourlonia cuneoi – type locality for species
 * † Mourlonia poperimensis
 * † Mourlonia sp.
 * † Moyerella
 * † Moyerella spinata – type locality for species
 * † Mucronaspis
 * † Mucronaspis sp.
 * † Multispongia – type locality for genus
 * † Multispongia aspera – type locality for species
 * † Mutationella
 * † Mutationella sp.
 * † Myofossa
 * † Myofossa antiqua
 * † Myonia – tentative report
 * † Myonia
 * † Myonia argentinensis – type locality for species
 * † Myonia argentinensis
 * † Myonia sp. – type locality for species
 * † Myonia sp.
 * † Myoplusia
 * † Myoplusia sulcata
 * † Naiadites – tentative report
 * † Naiadites
 * † Naiadites sp.
 * † Naiadites teckaensis – type locality for species
 * † Nanillaenus
 * † Nanillaenus gualcamayensis
 * † Nanillaenus sp.
 * † Nannopeltis
 * † Nannopeltis modesta
 * † Nannopeltis sp.
 * † Nanorthis – tentative report
 * † Nanorthis
 * † Nanorthis purmamarcaensis – type locality for species
 * † Nanorthis purmamarcaensis
 * † Nanorthis sp.
 * † Natasia
 * † Natasia boliviensis
 * † Natasia sp.
 * † Nemagraptus
 * † Nemagraptus gracilis
 * † Nemagraptus sp.
 * † Neoagnostus
 * † Neoagnostus sp.
 * † Neochonetes
 * † Neochonetes pegnonensis – type locality for species
 * † Neochonetes sp.
 * † Neoplatyteichum
 * † Neoplatyteichum barrealensis
 * † Neoplatyteichum sp.
 * † Neospirifer
 * † Neospirifer leoncitensis – tentative report
 * † Neospirifer leoncitensis
 * † Neothlipsurella
 * † Neothlipsurella jachalensis – type locality for species
 * † Neseuretus
 * † Neseuretus kobayashi
 * † Neseuretus sp.
 * † Netschajewia – tentative report
 * † Netschajewia sp.
 * † Nexospingia
 * † Nexospingia sp.
 * † Nexospongia – type locality for genus
 * † Nexospongia sillaensis – type locality for species
 * † Nicholsonella
 * † Nicholsonella sp.
 * † Nieszkowskia
 * † Nieszkowskia jakei
 * † Nieszkowskia sp.
 * † Nieszkowskia yongyii
 * † Nileus
 * † Nileus sp.
 * † Niobides
 * † Niobides armatus
 * † Niobides sp.
 * † Niobina
 * † Niobina sp.
 * † Niobina taurina
 * † Niquivilia
 * † Niquivilia extensa
 * † Niquivilia sp.
 * † Nodospira
 * † Nodospira sp.
 * † Noeggerathiopsis
 * † Noeggerathiopsis hislopi
 * † Normalograptus
 * † Normalograptus normalis
 * † Nortite
 * † Nortite sp.
 * † Nothorthis
 * † Nothorthis marginata – type locality for species
 * † Nothorthis marginata
 * † Notonychia – type locality for genus
 * † Notonychia emmae – type locality for species
 * † Notopeltis
 * † Notopeltis orthometopa
 * † Notopeltis orthometopoa
 * † Notopeltis sp.
 * † Notorthisina
 * † Notorthisina musculosa
 * † Nucleospira
 * † Nucleospira sp.
 * † Nuculanella
 * † Nuculanella camachoi
 * † Nuculavus
 * † Nuculavus levatiformis
 * † Nuculites
 * † Nuculites argentinum
 * † Nuculites sp.
 * † Nuculoidea – tentative report
 * † Nuculoidea sp.
 * † Nuculopsis – tentative report
 * † Nuculopsis
 * † Nuculopsis sp.
 * † Nuculosis – tentative report
 * † Nuculosis sp.
 * † Nugnecella
 * † Nugnecella sp.
 * † Nugnela
 * † Nugnela sp.
 * † Nuia
 * † Nuia sp.
 * † Oanduporella
 * † Oanduporella sp.
 * † Obolus
 * † Obolus sp.
 * † Occultocystis – type locality for genus
 * † Occultocystis koeneni – type locality for species
 * † Oedorhachis
 * † Oedorhachis typicalis
 * † Oelandoceras
 * † Oelandoceras sp.
 * † Oelandodus
 * † Oelandodus sp.
 * † Oelandograptus
 * † Oelandograptus sp.
 * † Oepikodus
 * † Oepikodus evae
 * † Oepikodus sp.
 * † Oepikoides
 * † Oepikoides sp.
 * † Ogyginus
 * † Ogyginus sp.
 * † Ogygiocaris
 * † Ogygiocaris araiorhachis
 * † Ogygiocaris sp.
 * † Ogygitella
 * † Ogygitella australis
 * † Oistodus
 * † Oistodus sp.
 * † Oncagnostus
 * † Oncagnostus sp.
 * † Oneotodus
 * † Oneotodus sp.
 * † Onychopyge
 * † Onychopyge argentina
 * † Onychopyge harringtoni – type locality for species
 * † Onychopyge longispina
 * † Onychopyge plagiacantha
 * † Onychopyge riojana
 * † Onychopyge sp.
 * † Oopsites
 * † Oopsites sp.
 * † Ophileta – tentative report
 * † Ophileta
 * † Ophileta sp.
 * † Opipeuter
 * † Opipeuter sp.
 * † Orbiculoidea
 * † Orbiculoidea sp.
 * † Orectodictya
 * † Orectodictya pansa
 * † Oriocrassatella – tentative report
 * † Oriocrassatella sp.
 * † Orometopus
 * † Orometopus notatifrons
 * † Orometopus pyrifrons
 * † Orthambonites
 * † Orthambonites sp.
 * † Orthidium
 * † Orthidium prominens – type locality for species
 * † Orthidium prominens
 * † Orthidium sp.
 * † Orthis
 * † Orthis sp.
 * † Orthoceras – tentative report
 * † Orthoceras sp.
 * † Orthograptus – tentative report
 * † Orthograptus
 * † Orthograptus sp.
 * † Orthoretiolites
 * † Orthoretiolites sp.
 * † Orthostrophella
 * † Orthostrophella sp. – type locality for species
 * † Orthostrophia
 * † Orthostrophia meridionalis – type locality for species
 * † Orthotheca
 * † Orthotheca sp.
 * † Ottokaria
 * † Ottokaria sp. 1informal
 * † Paciphacops
 * † Paciphacops argentinus
 * † Paganzophlebia – type locality for genus
 * † Paganzophlebia polyclada – type locality for species
 * † Palaeoconcha
 * † Palaeoconcha sp.
 * † Palaeolima
 * † Palaeolima antinaoensis
 * † Palaeolima sp.
 * † Palaeoneilo – tentative report
 * † Palaeoneilo
 * † Palaeoneilo amosi
 * † Palaeoneilo concentrica – or unidentified related form
 * † Palaeoneilo farbesi – or unidentified comparable form
 * † Palaeoneilo sp. – type locality for species
 * † Palaeoneilo sp.
 * † Palaeophycus
 * † Palaeophycus sp.
 * † Palaeovittaria
 * † Palaeovittaria sp. 1informal
 * † Palorthoceras – type locality for genus
 * † Palorthoceras kayseri – type locality for species
 * † Panderina – tentative report
 * † Panderina ambigua
 * † Panderodus
 * † Panderodus sp.
 * † Parabasilicus – tentative report
 * † Parabasilicus
 * † Parabasilicus typicalis – or unidentified related form
 * † Parabasilicus typicalis – or unidentified comparable form
 * † Parabolina
 * † Parabolina argentina
 * † Parabolina frequens
 * † Parabolina kobayashii
 * † Parabolina pheidolopyge
 * † Parabolina sp.
 * † Parabolinella – tentative report
 * † Parabolinella
 * † Parabolinella argentinenesis
 * † Parabolinella argentinensis
 * † Parabolinella coelatifrons
 * † Parabolinella sp.
 * † Parabolinella sp. Ainformal
 * † Parabolinella sp. Binformal
 * † Parabolinella sp. Cinformal
 * † Parabolinella triarthroides
 * † Parabolinella triathroides
 * † Parabolinella tumifrons – or unidentified comparable form
 * † Paracalamites
 * † Paracalamites sp. 1informal
 * † Paraconularia
 * † Paraconularia acuminata
 * † Paraconularia pulcheria
 * † Paraconularia sp.
 * † Paraconularia sueroi
 * † Paraconularia tepuelensis
 * † Paracordylodus
 * † Paracordylodus sp.
 * † Paracyclostomiceras
 * † Paracyclostomiceras sp.
 * † Paradelograptus – tentative report
 * † Paradelograptus
 * † Paradelograptus sp.
 * † Paradelograptus spp.
 * † Paraglossograptus
 * † Paraglossograptus sp.
 * † Paraglossograptus tentaculatus
 * † Paralenorthis
 * † Paralenorthis riojanus
 * † Paralenorthis sp.
 * † Paralenorthis suriensis
 * † Paralenorthis vulgaris
 * † Parallelodon – tentative report
 * † Parallelodon quichaurensis – type locality for species
 * † Parallelostrophia – type locality for genus
 * † Parallelostrophia
 * † Parallelostrophia septata – type locality for species
 * † Parallelostrophia septata
 * † Paranarkemina – type locality for genus
 * † Paranarkemina
 * † Paranarkemina kurtzi – type locality for species
 * † Paranocladus
 * † Paranocladus sp. 1informal
 * † Paranolcladus
 * † Paranolcladus sp.
 * † Parapanderodus
 * † Parapanderodus sp.
 * † Parapanderosus
 * † Parapanderosus sp.
 * † Paraparchites – tentative report
 * † Paraparchites sp.
 * † Parapilekia
 * † Parapilekia sp.
 * † Paraplicatolina
 * † Paraplicatolina acantha – type locality for species
 * † Paroistodus
 * † Paroistodus sp.
 * † Paromalomena
 * † Paromalomena polonica
 * † Parvohallopora
 * † Parvohallopora parvula
 * † Patellispongia
 * † Patellispongia argentina – type locality for species
 * † Patellispongia oculata – or unidentified comparable form
 * † Patellispongia oculata
 * † Patellispongia robusta – type locality for species
 * † Patellispongia robusta
 * † Patellispongia sp.
 * † Pateraspis
 * † Pateraspis sp.
 * † Paurorthis
 * † Paurorthis sp.
 * † Pecopteris
 * † Pecopteris sp. 1informal
 * † Pecopteris sp. 2informal
 * † Pecopteris sp. 3informal
 * † Pecopteris sp. 4informal
 * † Pecopteris sp. 5informal
 * † Peelerophon
 * † Peelerophon oehlerti – type locality for species
 * † Peelerophon oehlerti
 * † Peelerophon sp.
 * † Peltabellia
 * † Peltabellia sp.
 * † Peltocare
 * † Peltocare sp.
 * † Pemphigaspis
 * † Pemphigaspis perforata – type locality for species
 * † Pericospira
 * † Pericospira pericoensis
 * † Pericospira riojanensis
 * † Pericospira sanjuanensis
 * † Periodon
 * † Periodon sp.
 * † Permophorus
 * † Permophorus sp.
 * † Peruvispira – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Peruvispira
 * † Peruvispira australis
 * † Peruvispira sp.
 * † Peruvispira sueroi – type locality for species
 * † Peruvispira sueroi
 * † Petrodus
 * † Petrodus sp.
 * † Phacops
 * † Phacops argentinus
 * † Phakelodus
 * † Phakelodus elongatus
 * † Phanassymetria
 * † Phanassymetria sp. – type locality for species
 * † Pharostomina
 * † Pharostomina sp.
 * † Pharostomina tenuisulcata – type locality for species
 * † Phestia – tentative report
 * † Phestia
 * † Phestia sp. – type locality for species
 * † Phestia sp.
 * † Phestia sp. IVinformal
 * † Phestia sp. Vinformal
 * † Phestia tepuelensis
 * † Philiasptilon
 * † Philiasptilon huenickeni – type locality for species
 * † Pholadella
 * † Pholadella radiata
 * † Phragmodus
 * † Phragmodus sp.
 * † Phragmorthis
 * † Phragmorthis sp.
 * † Phyllograptus
 * † Phyllograptus sp.
 * † Phylloporina
 * † Phylloporina sassitoensis – type locality for species
 * † Phyllotheca
 * † Phyllotheca sp. 1informal
 * † Phyllotheca sp. 2informal
 * † Phyllothecotriletes – tentative report
 * † Phyllothecotriletes
 * † Phyllothecotriletes aggregatus
 * † Phyllothecotriletes belloyensis – or unidentified comparable form
 * † Piatnitzkia
 * † Piatnitzkia borreloi
 * † Picnotreta
 * † Picnotreta robusta – type locality for species
 * † Piloceras
 * † Piloceras sp.
 * † Pinatotoechia
 * † Pinatotoechia acantha
 * † Pircawayra
 * † Pircawayra peregrina
 * † Platillaenus
 * † Platillaenus sp.
 * † Platycalymene
 * † Platycalymene trapezoidalis
 * † Platyceras
 * † Platyceras sp.
 * † Platystrophia
 * † Platystrophia sp.
 * † Plectatrypa
 * † Plectatrypa sp.
 * † Plectodina
 * † Plectodina sp.
 * † Plectodonta
 * † Plectodonta minima – type locality for species
 * † Plectodonta minima
 * † Plectonotus
 * † Plectonotus sp.
 * † Plectothyrella
 * † Plectothyrella crassicosta
 * † Plectothyrella sp.
 * † Plesioparabolina
 * † Plesioparabolina proparia
 * † Plethopeltis
 * † Plethopeltis obtusus
 * † Pleurochonetes – tentative report
 * † Pleurochonetes sp.
 * † Pleurodictyum
 * † Pleurodictyum sp.
 * † Pleurophorella
 * † Pleurophorella elongata – type locality for species
 * † Pleurophorella elongata
 * † Pleurorthis
 * † Pleurorthis sp.
 * † Pleurothyrella
 * † Pleurothyrella knodi
 * † Pleurotomaria
 * † Pleurotomaria sp.
 * † Plicanoplia
 * † Plicanoplia sp.
 * † Plicatolina
 * † Plicatolina scalpa
 * † Plicatolina scalpta
 * † Plicatolina sp.
 * † Plicoplasia
 * † Plicoplasia planoconvexa – or unidentified comparable form
 * † Pliomera – tentative report
 * † Pliomera
 * † Pliomera sp.
 * † Pliomera tmetophrys
 * † Pliomeridius
 * † Pliomeridius sp.
 * † Pliomeridius sulcatus
 * † Pliomerina
 * † Pliomerina peripata
 * † Pliomerina sp.
 * † Pliomeroides
 * † Pliomeroides deferrariisi
 * † Pliomerops – tentative report
 * † Pliomerops sp.
 * † Polonodus
 * † Polonodus sp.
 * † Polycaulodus
 * † Polycaulodus sp.
 * † Polypora
 * † Polypora sp.
 * † Pomatotrema
 * † Pomatotrema sp.
 * † Porambonites
 * † Porambonites sp.
 * † Porterfieldia
 * † Porterfieldia jachalensis
 * † Porterfieldia sp.
 * † Praectenodonta
 * † Praectenodonta alternata
 * † Praenucula – tentative report
 * † Praenucula
 * † Praenucula plicata
 * † Praenucula sp.
 * † Praeundulomya
 * † Praeundulomya moreli – type locality for species
 * † Prasopora
 * † Prasopora argentina
 * † Primitiella – tentative report
 * † Primitiella sp.
 * † Prioniodus
 * † Prioniodus sp.
 * † Proceratopyge
 * † Proceratopyge incondita
 * † Proceratopyge inexpectata
 * † Productorthis
 * † Productorthis angulensis
 * † Productorthis cienagaensis
 * † Productorthis sp.
 * † Proetiella
 * † Proetiella tellechaei
 * † Prokrustia
 * † Prokrustia sp.
 * † Promopalaeaster – type locality for genus
 * † Promopalaeaster quadriserialis – type locality for species
 * † Promytilus – tentative report
 * † Promytilus
 * † Promytilus acinaciformis – type locality for species
 * † Promytilus acinaciformis
 * † Promytilus patagonicus
 * † Promytilus sp.
 * † Proparaparchites
 * † Proparaparchites sp.
 * † Prosopiscus
 * † Prosopiscus sp.
 * † Prospectatrix
 * † Prospectatrix sp.
 * † Protachilleum
 * † Protachilleum kayseri
 * † Protachilleum sp.
 * † Proterocameroceras
 * † Proterocameroceras sp.
 * † Protetiella
 * † Protetiella tellecheai
 * † Proteuloma
 * † Proteuloma sp. – type locality for species
 * † Protochonetes – tentative report
 * † Protochonetes sp.
 * † Protocycloceras
 * † Protocycloceras sp.
 * † Protocyptendoceras
 * † Protocyptendoceras fuenzalidae
 * † Protocyptendoceras sp.
 * † Protohesperonomia
 * † Protohesperonomia sp.
 * † Protoleptostrophia
 * † Protoleptostrophia concinna
 * † Protomya – tentative report
 * † Protomya sp.
 * † Protopanderodus
 * † Protopanderodus sp.
 * † Protopeltura – tentative report
 * † Protopeltura
 * † Protopeltura mesembria
 * † Protopeltura sp.
 * † Protopeltura vizcachensis – type locality for species
 * † Protopliomerops
 * † Protopliomerops sp.
 * † Protoprioniodus
 * † Protoprioniodus sp.
 * † Protorthisina – type locality for genus
 * † Protorthisina simplex – type locality for species
 * † Protoskenidioides
 * † Protoskenidioides revelata – or unidentified comparable form
 * † Prototreta
 * † Prototreta mimica – or unidentified comparable form
 * † Psarodictyum
 * † Psarodictyum magna – type locality for species
 * † Psarodictyum sp.
 * † Pseudagnostus
 * † Pseudagnostus idalis
 * † Pseudobasilicus
 * † Pseudobasilicus sp.
 * † Pseudobaylea
 * † Pseudobaylea poperimensis
 * † Pseudodainella
 * † Pseudodainella lata
 * † Pseudoharpatagnostus
 * † Pseudoharpatagnostus corrugatus
 * † Pseudoharpatagnostus tmetus
 * † Pseudohysterolenus
 * † Pseudohysterolenus infidus
 * † Pseudokainella
 * † Pseudokainella keideli
 * † Pseudokainella lata
 * † Pseudokainella pustulosa
 * † Pseudokainella sp.
 * † Pseudoleda
 * † Pseudoleda minuta
 * † Pseudooneotodus
 * † Pseudooneotodus beckmanni
 * † Pseudooneotodus sp.
 * † Pseudoperonopsis
 * † Pseudoperonopsis zuninoi
 * † Pseudophyllograptus
 * † Pseudophyllograptus sp.
 * † Pseudotalbontina
 * † Pseudotalbontina sp.
 * † Pseudotalbotina
 * † Pseudotalbotina ovalis – type locality for species
 * † Psilocara
 * † Psilocara sp.
 * † Pterinocrinus – tentative report
 * † Pterinocrinus australis – type locality for species
 * † Pterograptus
 * † Pterograptus sp.
 * † Ptiloconus
 * † Ptiloconus sp.
 * † Ptilodictya
 * † Ptilodictya intermedia
 * † Ptilograptus
 * † Ptilograptus sp.
 * † Ptychagnostus
 * † Ptychagnostus aculeatus
 * † Ptychagnostus cuyanus
 * † Ptychoglyptus
 * † Ptychoglyptus sp.
 * † Ptychopteria
 * † Ptychopteria liagracielae
 * † Pulchrilamina
 * † Pulchrilamina sp.
 * † Punctatisporites
 * † Punctatisporites glaber
 * † Punctatisporites irrasus – or unidentified comparable form
 * † Punctatisporites sp.informal
 * † Punctolira
 * † Punctolira sp.
 * † Purmanarcoceras
 * † Purmanarcoceras sp.
 * † Pustulatia
 * † Pustulatia jachalensis
 * † Pustulatisporites
 * † Pustulatisporites papillosus – or unidentified comparable form
 * † Pygodus
 * † Pygodus anserinus
 * † Pyramus
 * † Pyramus primigenius
 * † Quadratonucula
 * † Quadratonucula argentinensis
 * † Quadratonucula parva
 * † Quechuacrinus – type locality for genus
 * † Quechuacrinus tisca – type locality for species
 * † Radicalcarocrinus – type locality for genus
 * † Radicalcarocrinus huenickeni – type locality for species
 * † Rafinesquina
 * † Rafinesquina relicua – type locality for species
 * † Rafinesquina reliqua
 * † Raistrickia
 * † Raistrickia aculeata – or unidentified comparable form
 * † Raistrickia densa
 * † Raistrickia sp.informal
 * † Ramseyocrinus – type locality for genus
 * † Ramseyocrinus argentinus – type locality for species
 * † Ranapeltis
 * † Ranapeltis rowlandi – or unidentified related form
 * † Raphiophorus – tentative report
 * † Raphiophorus lamasi
 * † Raphiophorus sp.
 * † Reacalymene
 * † Reacalymene sp.
 * † Redonia
 * † Redonia riojana
 * † Redonia sp.
 * † Redonia suriensis
 * † Reginea – tentative report
 * † Reginea sp.
 * † Remopleuridioides
 * † Remopleuridioides preandinus
 * † Reteograptus
 * † Reteograptus sp.
 * † Reticularia
 * † Reticularia punillana – type locality for species
 * † Reticycloceras – tentative report
 * † Reticycloceras sp.
 * † Retispira
 * † Retispira patagoniensis – type locality for species
 * † Retispira patagoniensis
 * † Retusotriletes
 * † Retusotriletes anfractus
 * † Retusotriletes simplex
 * † Reuschella
 * † Reuschella sp.
 * † Reutterodus
 * † Reutterodus sp.
 * † Rhabdinopleura
 * † Rhabdinopleura sp.
 * † Rhabdinopora
 * † Rhabdinopora norvegica – or unidentified comparable form
 * † Rhabdinopora socialis – or unidentified comparable form
 * † Rhabdinopora sp.
 * † Rhabdochitina
 * † Rhabdochitina sp.
 * † Rhadinopleura
 * † Rhadinopleura eurycephala
 * † Rhenopyrgus
 * † Rhenopyrgus piojoensis – type locality for species
 * † Rhipidopsis
 * † Rhipidopsis sp. 1informal
 * † Rhodesognathus
 * † Rhodesognathus sp.
 * † Rhombampyx
 * † Rhombampyx sp.
 * † Rhopalocoelia
 * † Rhopalocoelia clarkii
 * † Rhopalocoelia rama – type locality for species
 * † Rhopalocoelia regularis
 * † Rhopalocoelia sp.
 * † Rhopalocoelia tenuis
 * † Rhynchopora
 * † Rhynchopora sp.
 * † Rhynchorthoceras
 * † Rhynchorthoceras minor – type locality for species
 * † Ribeiria
 * † Ribeiria compressa – or unidentified comparable form
 * † Ribeiria francae – type locality for species
 * † Ribeiria pojetai – type locality for species
 * † Ribeiria sp.
 * † Ribeiria spinosa
 * † Rigattoptera – type locality for genus
 * † Rigattoptera ornellasae – type locality for species
 * † Robsonoceras
 * † Robsonoceras sp.
 * † Rossaspis
 * † Rossaspis rossi
 * † Rossaspis sp.
 * † Rossodus
 * † Rossodus sp.
 * † Rostricellula
 * † Rostricellula sp.
 * † Roundya
 * † Roundya sp.
 * † Rugospongia – type locality for genus
 * † Rugospongia
 * † Rugospongia sp.
 * † Rugospongia viejoensis – type locality for species
 * † Rugostrophia
 * † Rugostrophia protoandina
 * † Sacabambaspis
 * † Sacabambaspis janvieri
 * † Sagavia
 * † Sagavia durandi – type locality for species
 * † Sagittodontus
 * † Sagittodontus sp.
 * † Salopella – or unidentified comparable form
 * † Salopella sp.
 * † Salopina
 * † Salopina messendenensis – or unidentified comparable form
 * † Salopina missendenensis – or unidentified comparable form
 * † Salopina sanjuanensis – type locality for species
 * † Salopina sp.
 * † Saltarella
 * † Saltarella sp.
 * † Saltaspis
 * † Saltaspis steinmanni
 * † Salterella
 * † Salterella maccullochi
 * † Saltite
 * † Saltite sp.
 * † Saltospirifer – type locality for genus
 * † Saltospirifer guevarii – type locality for species
 * † Saltospirifer guevarii
 * † Samaropsis
 * † Samaropsis sp. 1informal
 * † Samaropsis sp. 2informal
 * † Samaropsis sp. 3informal
 * † Sanbernardaspis
 * † Sanbernardaspis pygacantha
 * † Sanguinolites – tentative report
 * † Sanguinolites
 * † Sanguinolites freytesi
 * † Sanguinolites sp.
 * † Sanguinolites turneri
 * † Sanjuanampix
 * † Sanjuanampix sp.
 * † Sanjuanella
 * † Sanjuanella plicata
 * † Sanjuanella sp.
 * † Sanjuanetes – tentative report
 * † Sanjuanetes andina – tentative report
 * † Sanjuania – type locality for genus
 * † Sanjuania dorsisulcata – type locality for species
 * † Scalpellodus
 * † Scalpellodus sp.
 * † Scandodus
 * † Scandodus sp.
 * † Schizodus
 * † Schizodus cycloliratus – type locality for species
 * † Schizodus paucus
 * † Schizodus sp.
 * † Schizotreta
 * † Schizotreta sp.
 * † Scolopodus
 * † Scolopodus sp.
 * † Scotoharpes
 * † Scotoharpes sp.
 * † Semiacontiodus – tentative report
 * † Semiacontiodus
 * † Semiacontiodus sp.
 * † Septosyringothyris
 * † Septosyringothyris jaguelensis – or unidentified related form
 * † Septosyringothyris jaguelensis
 * † Septosyringothyris keideli – or unidentified related form
 * † Septosyringothyris keideli
 * † Septosyringothyris sp.
 * † Seudomacronotella
 * † Seudomacronotella sp.
 * † Shumardia
 * † Shumardia erquensis
 * † Shumardia minutula
 * † Shumardia sp.
 * † Sicorhynchia – tentative report
 * † Sicorhynchia sp.
 * † Skenidioides
 * † Skenidioides kayseri
 * † Skenidioides sp.
 * † Solopina
 * † Solopina sanjuanensis
 * † Sowerbyella
 * † Sowerbyella sp.
 * † Sphaerocare – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Sphaerocare
 * † Sphaerocare globifrons – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Sphaerocare globifrons
 * † Sphecorydaloides – type locality for genus
 * † Sphecorydaloides lucchesei – type locality for species
 * † Sphenophyllum
 * † Sphenophyllum sp. 1informal
 * † Sphenophyllum sp. 2informal
 * † Sphenophyllum sp. 3informal
 * † Sphenopteris
 * † Sphenopteris sp. 1informal
 * † Sphenopteris sp. 2informal
 * † Sphenopteris sp. 3informal
 * † Sphenotomorpha
 * † Sphenotomorpha ulrichi – or unidentified comparable form
 * † Spinoplasia
 * † Spinoplasia plobletensis
 * † Spiriferellina
 * † Spiriferellina octoplicata
 * † Spiriferellina sp.
 * † Spirilira
 * † Spirilira gonzalezi
 * † Spirilira tenuis – type locality for species
 * † Staufferella
 * † Staufferella sp.
 * † Staurograptus
 * † Staurograptus dichotomus
 * † Stegerhynchus
 * † Stegerhynchus pusillum
 * † Stenoblepharum
 * † Stenoblepharum astinil – type locality for species
 * † Stenoblepharum astinil
 * † Stenoblepharum sp.
 * † Stenozone
 * † Stenozone argentinus
 * † Stolodus
 * † Stolodus sp.
 * † Strachanognathus
 * † Strachanognathus sp.
 * † Straparollus
 * † Straparollus sp.
 * † Streblochondria – tentative report
 * † Streblochondria
 * † Streblochondria sp.
 * † Streblochondria sueroi – type locality for species
 * † Streblochondria sueroi
 * † Streblopteria
 * † Streblopteria lagunensis
 * † Streblopteria minuta – type locality for species
 * † Streblopteria minuta
 * † Streblopteria montgomeryi – type locality for species
 * † Streblopteria montgomeryi
 * † Streblopteria sp. – type locality for species
 * † Streblopteria sp.
 * † Strepsodiscus
 * † Strepsodiscus austrinus – type locality for species
 * † Strepsodiscus austrinus
 * † Streptorhynchus – tentative report
 * † Streptorhynchus
 * † Streptorhynchus inaequiornatus
 * † Streptorhynchus sp.
 * † Striatodontus
 * † Striatodontus sp.
 * † Strictagnostus – tentative report
 * † Strictagnostus micropeltis
 * † Strictagnostus sp.
 * † Strobeus
 * † Strobeus sp.
 * † Stutchburia
 * † Stutchburia sp.
 * † Sueroa – type locality for genus
 * † Sueroa
 * † Sueroa andreisi – type locality for species
 * † Sueroa andreisi
 * † Sueroa chubutensis
 * † Sueroceras
 * † Sueroceras irregulare
 * † Sueroceras sp.
 * † Suria
 * † Suria ovalis
 * † Suriaspis
 * † Suriaspis sp.
 * † Suriorthis
 * † Suriorthis depressus
 * † Symphysurus
 * † Symphysurus sp.
 * † Synhomalanotus
 * † Synhomalanotus kobayashii
 * † Synhomalonotus
 * † Synhomalonotus sp.
 * † Syntrophia
 * † Syntrophia sanjuanina – type locality for species
 * † Syntrophia sanjuanina
 * † Syringothyris
 * † Syringothyris feruglioi – type locality for species
 * † Taffia
 * † Taffia anomala
 * † Taffia sp.
 * † Taiophlebia
 * † Taiophlebia ferreirai – type locality for species
 * † Talacastella
 * † Talacastella herrerai
 * † Talacastonia – type locality for genus
 * † Talacastonia
 * † Talacastonia chela – type locality for species
 * † Talacastonia sp.
 * † Taphrorthis
 * † Taphrorthis sp.
 * † Tarfaya – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Tarfaya grandis
 * † Tarphophragma
 * † Tarphophragma multitabulata – or unidentified related form
 * † Telephina
 * † Telephina sp.
 * † Teridontus
 * † Teridontus obesus
 * † Teridontus sp.
 * † Terograptus
 * † Terograptus sp.
 * † Tetragraptus
 * † Tetragraptus akzharensis – or unidentified comparable form
 * † Tetragraptus akzharensis
 * † Tetragraptus amii – or unidentified comparable form
 * † Tetragraptus approximatus
 * † Tetragraptus bigsbyi
 * † Tetragraptus phyllograptoides
 * † Tetragraptus quadribrachiatus – or unidentified comparable form
 * † Tetragraptus quadribrachiatus
 * † Tetragraptus reclinatus – or unidentified comparable form
 * † Tetragraptus sp.
 * † Tetraporina
 * † Tetraporina horologia
 * † Tetraporina sibirica – or unidentified comparable form
 * † Tetraporina sp.informal
 * † Thalassinoides
 * † Thalassinoides paradoxicus
 * † Thamnograptus
 * † Thamnograptus sp.
 * † Thlipsurella
 * † Thlipsurella ellipsoclefta – or unidentified related form
 * † Thysanopyge – tentative report
 * † Thysanopyge
 * † Thysanopyge argentina
 * † Thysanopyge clavijoi
 * † Thysanopyge latelimbata
 * † Thysanopyge sp.
 * † Tissintia
 * † Tissintia sp.
 * † Tivertonia
 * † Tivertonia jachalensis
 * † Tivertonia pillahuincensis – type locality for species
 * † Toernquistia – type locality for genus
 * † Toernquistia
 * † Toernquistia sanchezae – type locality for species
 * † Toernquistia sanchezae
 * † Toernquistia sp.
 * † Tolmachovia
 * † Tolmachovia andina – type locality for species
 * † Tolmachovia sp.
 * † Tomagnostella
 * † Tomagnostella exsculpta
 * † Tomiopsis
 * † Tomiopsis harringtoni – type locality for species
 * † Tomiopsis harringtoni
 * † Tornquistia – tentative report
 * † Tornquistia sp.
 * † Tortilicaulis – or unidentified comparable form
 * † Tortilicaulis sp.
 * † Triarthrus
 * † Triarthrus jachalensis
 * † Triarthrus parchaensis
 * † Triarthrus parchanensis
 * † Triarthrus parchensis
 * † Triarthrus rectifrons
 * † Triarthrus shinetonensis
 * † Triarthrus sp.
 * † Triarthrus tertragonalis
 * † Trigonirhynchia
 * † Trigonirhynchia sp.
 * † Trigonoconcha – type locality for genus
 * † Trigonoconcha acuta – type locality for species
 * † Trigonodictya
 * † Trigonodictya cirrita
 * † Trigonodictya parvula
 * † Trigonograptus
 * † Trigonograptus sp.
 * † Trigonostrophia
 * † Trigonostrophia reversa
 * † Trigonotreta – tentative report
 * † Trigonotreta
 * † Trigonotreta sp.
 * † Trilobagnostus – tentative report
 * † Trilobagnostus sp.
 * † Trimerus
 * † Trimerus flexuosus
 * † Trimerus grandis
 * † Trimerus kayseri
 * † Trimerus sp.
 * † Trinodus – tentative report
 * † Trinodus
 * † Trinodus jujuyensis
 * † Trinodus saltaensis
 * † Trinodus sp.
 * † Trinucleus
 * † Trinucleus sp.
 * † Trispinatia
 * † Trispinatia sp.
 * † Tristichograptus
 * † Tristichograptus sp.
 * † Tritoechia
 * † Tritoechia mollesensis
 * † Tritoechia preandina – type locality for species
 * † Tritoechia preandina
 * † Tritoechia prima – type locality for species
 * † Tritoechia prima
 * † Tritoechia sp.
 * † Tropidodiscus
 * † Tropidodiscus sp.
 * † Tropodus
 * † Tropodus sp.
 * † Tupacsala – type locality for genus
 * † Tupacsala niunamenos – type locality for species
 * † Tupelosia – type locality for genus
 * † Tupelosia paganzoensis – type locality for species
 * † Tvaerenella
 * † Tvaerenella sp.
 * † Ucumaris – type locality for genus
 * † Ucumaris conradoi – type locality for species
 * † Ucumaropsis – type locality for genus
 * † Ucumaropsis
 * † Ucumaropsis lermaensis – type locality for species
 * † Ucumaropsis lermaensis
 * † Ugartecladus
 * † Ugartecladus sp. 1informal
 * † Ulrichodina
 * † Ulrichodina sp.
 * † Undulograptus
 * † Undulograptus sp.
 * † Uromystrum
 * † Uromystrum sp.
 * † Utahconus – or unidentified related form
 * † Utahconus
 * † Utahconus longipinnatus – or unidentified related form
 * † Utahconus longipinnatus
 * † Vacunella – tentative report
 * † Vacunella
 * † Vacunella camachoi – type locality for species
 * † Vacunella sp.
 * † Valcourea
 * † Valcourea sp.
 * † Velisoptera – type locality for genus
 * † Velisoptera taschi – type locality for species
 * † Velizphlebia – type locality for genus
 * † Velizphlebia cruzi – type locality for species
 * † Verrucosisporites
 * † Verrucosisporites minutus
 * † Villicumia – type locality for genus
 * † Villicumia canteraensis – type locality for species
 * † Vojnowskya
 * † Vojnowskya argentina
 * † Waisfeldaspis
 * † Waisfeldaspis sp.
 * † Walkomiella
 * † Walkomiella sp. 1informal
 * † Westonoceras
 * † Westonoceras sp.
 * † Whiteavesia
 * † Whiteavesia sp.
 * † Wiedeioceras
 * † Wiedeioceras argentinense
 * † Wilkingia
 * † Wilkingia riojana
 * † Wurmiella
 * † Wurmiella excavata
 * † Xenoptera – type locality for genus
 * † Xenoptera riojaensis – type locality for species
 * † Yachalicystis – type locality for genus
 * † Yachalicystis triangularis – type locality for species
 * † Yagonia
 * † Yagonia furquei
 * † Yunnania
 * † Yunnania pygmaeus
 * † Zaphrenthis – tentative report
 * † Zaphrenthis sp.
 * † Zaplaops
 * † Zaplaops zaplensis
 * † Zondarella – type locality for genus
 * † Zondarella communis – type locality for species
 * † Zorotoxotis
 * † Zorotoxotis sp. – type locality for species
 * † Zuninaspis
 * † Zuninaspis acuminatus
 * † Zuninaspis sp.
 * † Zygograptus
 * † Zygograptus sp.

Mesozoic

 * † Abelichnus – type locality for genus
 * † Abelichnus
 * † Abelichnus astigarrae – type locality for species
 * † Abelichnus astigarrae
 * † Abelisaurus – type locality for genus
 * † Abelisaurus comahuensis – type locality for species
 * † Acanthodiscus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Acanthodiscus
 * † Acanthodiscus radiatus – or unidentified comparable form
 * † Acanthodiscus vaceki
 * † Acanthodiscus wichmanni
 * † Acanthohoplites
 * † Acanthohoplites sp.
 * † Acanthopleuroceras
 * † Acanthopleuroceras stahli – or unidentified comparable form
 * † Acesta
 * † Acesta latens
 * † Acesta sp.
 * † Achillesaurus – type locality for genus
 * † Achillesaurus manazzonei – type locality for species
 * † Acicularia
 * † Acicularia sp.
 * † Acteon
 * † Acteon andinus
 * † Acteon australis
 * † Actinastrea
 * † Actinastrea piveteaui – or unidentified comparable form
 * † Actinastrea sp.
 * † Aculea
 * † Aculea bifida
 * † Ademosyne
 * † Ademosyne arcucciae – type locality for species
 * † Ademosyne arcucciae
 * † Ademosyne elongatus – type locality for species
 * † Ademosyne elongatus
 * † Ademosyne hexacostata – type locality for species
 * † Ademosyne hexacostata
 * † Ademosyne llantenesensis – type locality for species
 * † Ademosyne punctuada – type locality for species
 * † Ademosyne punctuada
 * † Ademosyne rosenfeldi – type locality for species
 * † Ademosyne umutu – type locality for species
 * † Adeopapposaurus – type locality for genus
 * † Adeopapposaurus
 * † Adeopapposaurus mognai – type locality for species
 * † Adeopapposaurus mognai
 * † Adiantopteris
 * † Adiantopteris tripinnata – type locality for species
 * † Aegocrioceras
 * † Aegocrioceras sp.
 * † Aeolosaurus – type locality for genus
 * † Aeolosaurus
 * † Aeolosaurus colhuehuapensis – type locality for species
 * † Aeolosaurus rionegrinus – type locality for species
 * † Aeolosaurus sp.
 * † Aequipecten
 * † Aequipecten octoplicoides
 * † Aequitriradites
 * † Aequitriradites baculatus
 * † Aequitriradites sp.
 * † Aequitriradites spinulosus
 * † Aequitriradites superspinulosus – or unidentified comparable form
 * † Aequitriradites superspinulosus
 * † Aequitriradites verrucosus
 * † Aerosteon – type locality for genus
 * † Aerosteon riocoloradensis – type locality for species
 * † Aerotitan – type locality for genus
 * † Aerotitan sudamericanus – type locality for species
 * † Aetosauroides – type locality for genus
 * † Aetosauroides
 * † Aetosauroides scagliai – type locality for species
 * † Aetosauroides scagliai
 * † Aetosauroides sp.
 * † Afropollis
 * † Afropollis jardinus – or unidentified related form
 * † Afropollis operculatus
 * † Afropollis sp.informal
 * † Afropollis zonatus
 * † Agassiceras
 * † Agassiceras scipionianum – or unidentified comparable form
 * † Agassiceras sp.
 * † Agathoxylon
 * † Agathoxylon sp.informal
 * † Agerchlamys
 * † Agerchlamys wunschae
 * † Aguilerella
 * † Aguilerella neuquensis – type locality for species
 * † Agustinia – type locality for genus
 * † Agustinia ligabuei – type locality for species
 * † Alamitophis – type locality for genus
 * † Alamitophis
 * † Alamitophis argentinus
 * † Alamitophis elongatus
 * † Alamitophis rionegrinus – type locality for species
 * † Alamitornis – type locality for genus
 * † Alamitornis minutus – type locality for species
 * † Alatacythere – tentative report
 * † Alatacythere rocana
 * † Alisporites
 * † Alisporites similis
 * † Alisporites sp.informal
 * † Alkastrobus – type locality for genus
 * † Alkastrobus peltatus – type locality for species
 * † Almadasuchus – type locality for genus
 * † Almadasuchus figarii – type locality for species
 * † Alnashetri – type locality for genus
 * † Alnashetri cerropoliciensis – type locality for species
 * † Alsatites – tentative report
 * † Alsatites liasicus – or unidentified comparable form
 * † Alsophilidites
 * † Alsophilidites sp.informal
 * † Alterbidinium
 * † Alterbidinium acutulum
 * † Alvarezsaurus – type locality for genus
 * † Alvarezsaurus calvoi – type locality for species
 * † Amargasaurus – type locality for genus
 * † Amargasaurus cazaui – type locality for species
 * † Amargasuchus – type locality for genus
 * † Amargasuchus minor – type locality for species
 * † Ambercyclus – tentative report
 * † Ambercyclus
 * † Ambercyclus espinosus – type locality for species
 * † Ambercyclus isabelensis
 * † Ambigostrea
 * † Ambigostrea arcotensis
 * † Ambigostrea clarae
 * † Ambigostrea vulselloides
 * † Amblypterus
 * † Amblypterus lujanensis
 * † Ameghinichnus – type locality for genus
 * † Ameghinichnus
 * † Ameghinichnus manantialensis – type locality for species
 * † Ameghinichnus patagonicus – type locality for species
 * † Ammodiscus
 * † Ammodiscus sp.
 * † Amphidonte
 * † Amphidonte mendozana
 * † Amphidonte minos
 * † Amphidonte sp.
 * † Amygdalodon – type locality for genus
 * † Amygdalodon patagonicus – type locality for species
 * † Anabisetia – type locality for genus
 * † Anabisetia
 * † Anabisetia saldiviai – type locality for species
 * † Anabisetia saldiviai
 * † Anablatta – type locality for genus
 * † Anablatta compacta – type locality for species
 * † Anacanthotriletes
 * † Anacanthotriletes sp. 1informal
 * † Anacolosidites
 * † Anacolosidites diffusa
 * † Anagaudryceras
 * † Anagaudryceras politissimum – or unidentified comparable form
 * † Anatoia
 * † Anatoia debilis – type locality for species
 * † Anatoia semiovata – type locality for species
 * † Ancanamunia
 * † Ancanamunia mollensis – type locality for species
 * † Anchisauripus
 * † Anchisauripus australis – type locality for species
 * † Andalusiella
 * † Andalusiella sp.
 * † Andenipora
 * † Andenipora sp.
 * † Andesaurus – type locality for genus
 * † Andesaurus delgadoi – type locality for species
 * † Andescynodon – type locality for genus
 * † Andescynodon mendozensis – type locality for species
 * † Andesites
 * † Andesites curvatus
 * † Andiceras
 * † Andiceras fallax
 * † Andicoeloceras
 * † Andicoeloceras sp. Ainformal
 * † Andidiscus
 * † Andidiscus behrendseni – type locality for species
 * † Andidiscus behrendseni – or unidentified comparable form
 * † Andidiscus behrendseni
 * † Andidiscus carinatus – type locality for species
 * † Andidiscus carinatus – or unidentified comparable form
 * † Andidiscus carinatus
 * † Andidiscus multiformis – type locality for species
 * † Andidiscus multiformis
 * † Andidiscus piutrinensis – type locality for species
 * † Andidiscus piutrinensis
 * † Andidiscus prorsiflexus – type locality for species
 * † Andidiscus prorsiflexus
 * † Andidiscus volkheimeri – type locality for species
 * † Andidiscus volkheimeri
 * † Anditrigonia
 * † Anditrigonia eximia
 * † Anditrigonia lamberti
 * † Angiosperm
 * † Angiosperm tetrade
 * † Angulaticeras
 * † Angulaticeras marmoreum – or unidentified comparable form
 * † Aniksosaurus – type locality for genus
 * † Aniksosaurus darwini – type locality for species
 * † Anomia
 * † Anomia solitaria
 * † Anomia sp.
 * † Antarctosaurus – type locality for genus
 * † Antarctosaurus
 * † Antarctosaurus giganteus – type locality for species
 * † Antarctosaurus wichmannianus – type locality for species
 * † Antevsia
 * † Antevsia sp. 1informal
 * † Anthonya
 * † Anthonya jarai – type locality for species
 * † Anthonya jarai
 * † Antulsporites
 * † Antulsporites baculatus
 * † Antulsporites sp.informal
 * † Anulifera
 * † Anulifera chubutensis – type locality for species
 * † Aonikenkissus – type locality for genus
 * † Aonikenkissus zamunerae – type locality for species
 * † Aoniraptor – type locality for genus
 * † Aoniraptor libertatem – type locality for species
 * † Aphrodina
 * † Aphrodina australis
 * † Aphrodina quintucoensis
 * † Aphrodina sp.
 * † Aphrodina thomsoni – or unidentified comparable form
 * † Aphrodina wilckensi
 * † Apiculatisporites
 * † Apiculatisporites sp.
 * † Apoderoceras – tentative report
 * † Apoderoceras sp.
 * † Appendicisporites
 * † Appendicisporites giganticus – or unidentified comparable form
 * † Appendicisporites potomacensis – or unidentified comparable form
 * † Appendicisporites potomacensis
 * † Appendicisporites pschekhaensis – or unidentified comparable form
 * † Appendicisporites sp. 1informal
 * † Appendicisporites sp. 2informal
 * † Appendicisporites spp.informal
 * † Appendicisporites spp. 1informal
 * † Appendicisporites spp. 2informal
 * † Appendicisporites spp. 3informal
 * † Appendicisporites spp. 4informal
 * † Appendicisporites spp. 5informal
 * † Appendicisporites spp. 6informal
 * † Appendicisporites spp. 7informal
 * † Appendicisporites spp. 8informal
 * † Appendicisporites tricornitatus
 * † Appendicisporites unicus – or unidentified comparable form
 * † Apteodinium
 * † Apteodinium granulatum
 * † Apteodinium sp.
 * † Aquatilavipes – or unidentified comparable form
 * † Aquatilavipes sp.
 * † Araliaephyllum
 * † Araliaephyllum cachetamanense – type locality for species
 * † Araripesuchus
 * † Araripesuchus buitreraensis – type locality for species
 * † Araripesuchus patagonicus – type locality for species
 * † Araripesuchus sp.
 * † Aratrisporites
 * † Aratrisporites sp.informal
 * † Araucanastrea – type locality for genus
 * † Araucanastrea
 * † Araucanastrea majuscula – type locality for species
 * † Araucanastrea minuscula – type locality for species
 * † Araucanites
 * † Araucanites prereyesi
 * † Araucanites reyesi – or unidentified related form
 * † Araucanites reyesi – or unidentified comparable form
 * † Araucanites reyesi
 * † Araucanites sp.
 * † Araucanites stipanicici
 * † Araucaria
 * † Araucaria grandifolia
 * † Araucaria mirabilis
 * † Araucaria sp. 1informal
 * † Araucariacites
 * † Araucariacites australis
 * † Araucariacites pergranulatus
 * † Araucarioxylon
 * † Araucarioxylon sp. 1informal
 * † Araucarites
 * † Araucarites sp. 1informal
 * † Araucarites sp. 2informal
 * † Arcellites
 * † Arcellites disciformis
 * † Arcellites humilis – type locality for species
 * † Arcellites humilis
 * † Arcellites pentagonalis – type locality for species
 * † Arcellites reticulatus – or unidentified comparable form
 * † Arcellites santacrucensis – type locality for species
 * † Arcellites santacrucensis
 * † Arcellites sp. Ainformal
 * † Archaeocenosphaera
 * † Archaeocenosphaera ruesti – or unidentified comparable form
 * † Archamphiroa
 * † Archamphiroa jurassica
 * † Archangelskya
 * † Archangelskya sp. 1informal
 * † Arecipites
 * † Arecipites minutiscabratus
 * † Arecipites sp.informal
 * † Arecipites sp.
 * † Arenicolites
 * † Arenicolites sp.
 * † Argenticyprina – type locality for genus
 * † Argenticyprina
 * † Argenticyprina mulensis – type locality for species
 * † Argenticyprina mulensis
 * † Argentinoblatta – type locality for genus
 * † Argentinoblatta
 * † Argentinoblatta herbsti – type locality for species
 * † Argentinoblatta sp.
 * † Argentinoblattula – type locality for genus
 * † Argentinoblattula
 * † Argentinoblattula revelata – type locality for species
 * † Argentinoblattula revelata – tentative report
 * † Argentinocicada – type locality for genus
 * † Argentinocicada
 * † Argentinocicada magna – type locality for species
 * † Argentinocicada minima – type locality for species
 * † Argentinocupes – type locality for genus
 * † Argentinocupes
 * † Argentinocupes abdalai – type locality for species
 * † Argentinocupes pulcher – type locality for species
 * † Argentinocupes pulcher
 * † Argentinocupes sara – type locality for species
 * † Argentinoglosselytrina – type locality for genus
 * † Argentinoglosselytrina pulchella – type locality for species
 * † Argentinopanorpa – type locality for genus
 * † Argentinopanorpa miguezi – type locality for species
 * † Argentinoperlidium – type locality for genus
 * † Argentinoperlidium rogersi – type locality for species
 * † Argentinopetala – type locality for genus
 * † Argentinopetala archangelskyi – type locality for species
 * † Argentinopheloscyta – type locality for genus
 * † Argentinopheloscyta forsterae – type locality for species
 * † Argentinosaurus – type locality for genus
 * † Argentinosaurus huinculensis – type locality for species
 * † Argentinoscytina – type locality for genus
 * † Argentinoscytina clara – type locality for species
 * † Argentinosuchus – type locality for genus
 * † Argentinosuchus bonapartei – type locality for species
 * † Argentinosyne
 * † Argentinosyne bonapartei – type locality for species
 * † Argentinosyne duraznoensis – type locality for species
 * † Argentinosyne frenguellii – type locality for species
 * † Argentinosyne frenguellii
 * † Argentinosyne gonaldiae – type locality for species
 * † Argentinosyne gonaldiae
 * † Argentinosyne gualoensis – type locality for species
 * † Argentinosyne ischichucaensis – type locality for species
 * † Argentinosyne ischichucaensis
 * † Argentinosyne losrastrosensis – type locality for species
 * † Argentinosyne losrastrosensis
 * † Argentinosyne rugosa – type locality for species
 * † Argentinosyne rugosa
 * † Argentoconodon – type locality for genus
 * † Argentoconodon fariasorum – type locality for species
 * † Argentodites – type locality for genus
 * † Argentodites coloniensis – type locality for species
 * † Argyrosaurus – type locality for genus
 * † Argyrosaurus superbus – type locality for species
 * † Aristonectes – type locality for genus
 * † Aristonectes
 * † Aristonectes parvidens – type locality for species
 * † Aristonectes parvidens – or unidentified comparable form
 * † Arnioceras
 * † Arnioceras oppeli – or unidentified comparable form
 * † Arnioceras sp.
 * † Arriagadoolithus – type locality for genus
 * † Arriagadoolithus patagoniensis – type locality for species
 * † Arthropterygius
 * † Arthropterygius sp.
 * † Arthrotaxites
 * † Arthrotaxites ungeri
 * † Asfaltomylos – type locality for genus
 * † Asfaltomylos patagonicus – type locality for species
 * † Aspidoceras
 * † Aspidoceras haynoldi – or unidentified related form
 * † Aspidoceras rafaeli
 * † Aspidoceras sp.
 * † Asplenites
 * † Asplenites lanceolatus
 * † Asplenium
 * † Asplenium dicksonianum
 * † Astarte – tentative report
 * † Astarte
 * † Astarte elongata
 * † Astarte sp.
 * † Asterisporites
 * † Asterisporites chlonovae
 * † Asteropollis
 * † Asteropollis asteroides
 * † Asteropollis sp.informal
 * † Asteropollis transitorius
 * † Asterotheca
 * † Asterotheca sp. 1informal
 * † Astraraea
 * † Astraraea fungiformis – or unidentified comparable form
 * † Athrotaxis
 * † Athrotaxis ungeri
 * † Athrotaxites
 * † Athrotaxites sp. 1informal
 * † Atractosteus – or unidentified comparable form
 * † Atractosteus sp.
 * † Atreta
 * † Atreta intusstriata – or unidentified comparable form
 * † Aucasaurus – type locality for genus
 * † Aucasaurus garridoi – type locality for species
 * † Aucellina
 * † Aucellina andina
 * † Aucellina euglypha
 * † Aucellina radiatostriata
 * † Aucellina sp.
 * † Aulaconphinctes
 * † Aulaconphinctes mangaensis
 * † Aulacosphinctes
 * † Aulacosphinctes sp.
 * † Aulacosphinctoides
 * † Aulacosphinctoides sp.
 * † Aulasconphinctes
 * † Aulasconphinctes proximus
 * † Auriculozonospora
 * † Auriculozonospora spongiosa – type locality for species
 * † Auritulina
 * † Auritulina sp.informal
 * † Auritulinasporites
 * † Auritulinasporites sp.informal
 * † Australiceras
 * † Australiceras hallei
 * † Australiceras sp.
 * † Australocicada
 * † Australocicada arcucciae – type locality for species
 * † Australoneilo
 * † Australoneilo gracilis
 * † Australophis – type locality for genus
 * † Australophis
 * † Australophis anilioides – type locality for species
 * † Australophis anilioides
 * † Australoseris – type locality for genus
 * † Australoseris
 * † Australoseris radialis – type locality for species
 * † Australoseris radialis
 * † Australoseris sp.
 * † Austroaporrhais
 * † Austroaporrhais gregaria – or unidentified comparable form
 * † Austrocardium
 * † Austrocardium acuticostatum
 * † Austrocheirus – type locality for genus
 * † Austrocheirus isasii – type locality for species
 * † Austrolepidotes
 * † Austrolepidotes cuyanus
 * † Austroraptor – type locality for genus
 * † Austroraptor
 * † Austroraptor cabazai – type locality for species
 * † Austroraptor cabazai
 * † Austrotriconodon – type locality for genus
 * † Austrotriconodon
 * † Austrotriconodon mckennai – type locality for species
 * † Austrotriconodon sepulvedai – type locality for species
 * † Austrotrigonia – or unidentified comparable form
 * † Austrotrigonia
 * † Austrotrigonia pampeana
 * † Austrotrigonia sobrali
 * † Avitabatrachus – type locality for genus
 * † Avitabatrachus uliana – type locality for species
 * † Azolla
 * † Azolla cretacea
 * † Azolla rhizosperma
 * † Azolla sp.
 * † Azollopsis
 * † Azollopsis polyancyra
 * † Azollopsis tormentosa
 * † Babuskaya – type locality for genus
 * † Babuskaya elaterata – type locality for species
 * † Baculatisporites
 * † Baculatisporites comaumensis
 * † Baculatisporites kachaikensis – type locality for species
 * † Baculatisporites kachaikensis
 * † Baculatisporites sp.informal
 * † Baculatisporites sp.
 * † Baculites
 * † Baculites kirki – or unidentified comparable form
 * † Baculites sp.
 * † Bacutriletes
 * † Bacutriletes guttula
 * † Bacutriletes sp. Ainformal
 * † Bacutriletes triangulatus – type locality for species
 * † Bacutriletes triangulatus
 * † Badouxia
 * † Badouxia canadensis
 * † Bagotum
 * † Bagotum modestum
 * † Baiera
 * † Baiera australis – or unidentified comparable form
 * † Baiera sp. 1informal
 * † Bakevellia
 * † Bakevellia pintadae – type locality for species
 * † Bakevellia pintadae
 * † Bakevellia sp.
 * † Balmeiopsis
 * † Balmeiopsis limbatus
 * † Balmeisporites
 * † Balmeisporites holodictyus
 * † Baluchicardia
 * † Baluchicardia sp.
 * † Barberenia – type locality for genus
 * † Barberenia
 * † Barberenia allenensis – type locality for species
 * † Barberenia araujoae – type locality for species
 * † Barcinosuchus – type locality for genus
 * † Barcinosuchus gradilis – type locality for species
 * † Barrosasaurus – type locality for genus
 * † Barrosasaurus casamiquelai – type locality for species
 * † Barrosopus – type locality for genus
 * † Barrosopus slobodai – type locality for species
 * † Batiacasphaera
 * † Batiacasphaera kekerengensis – or unidentified comparable form
 * † Bayomesasuchus – type locality for genus
 * † Bayomesasuchus hernandezi – type locality for species
 * † Beaupreaidites
 * † Beaupreaidites elegansiformis
 * † Beaupreaidites sp.
 * † Beaupreaidites sp. 1informal
 * † Belemnopsis
 * † Belemnopsis gladiatoris – or unidentified comparable form
 * † Belemnopsis madagascariensis – or unidentified comparable form
 * † Belemnopsis patagoniensis
 * † Belemnopsis sp.
 * † Berenicea – tentative report
 * † Berenicea sp.
 * † Berriasella
 * † Berriasella calistoides
 * † Berriasella espinulosa
 * † Berriasella mendozana
 * † Berriasella sp.
 * † Berriasiella
 * † Berriasiella sp.
 * † Besairieceras
 * † Besairieceras pseudoregale
 * † Beudanticeras
 * † Beudanticeras laevigatum – or unidentified comparable form
 * † Beudanticeras revoili
 * † Bicentenaria – type locality for genus
 * † Bicentenaria argentina – type locality for species
 * † Bicorbula
 * † Bicorbula sp.
 * † Bignonites
 * † Bignonites chalianus
 * † Biretisporites – tentative report
 * † Biretisporites
 * † Biretisporites crassilabratus – or unidentified comparable form
 * † Biretisporites potoniaei – or unidentified comparable form
 * † Biretisporites potoniei – or unidentified comparable form
 * † Biretisporites sp.informal
 * † Biretisporites sp.
 * † Biretisporites sp. Ainformal
 * † Biretisporites sp. Binformal
 * † Biretisporites sp. Cinformal
 * † Bisulcocypris
 * † Bisulcocypris sp.
 * † Blattulopsis – type locality for genus
 * † Blattulopsis popovi – type locality for species
 * † Bolilaspirifer
 * † Bolilaspirifer riccardii – type locality for species
 * † Bombacacidites
 * † Bombacacidites sp. 1informal
 * † Bonaparteichnium – type locality for genus
 * † Bonaparteichnium tali – type locality for species
 * † Bonapartemys – type locality for genus
 * † Bonapartemys bajobarrealis – type locality for species
 * † Bonapartenykus – type locality for genus
 * † Bonapartenykus
 * † Bonapartenykus ultimus – type locality for species
 * † Bonapartenykus ultimus
 * † Bonarelliella – type locality for genus
 * † Bonarelliella
 * † Bonarelliella ameghinorum
 * † Bonarelliella brackebuschii – type locality for species
 * † Bonarelliella jueya – type locality for species
 * † Bonarelliella multicosta
 * † Bonatitan – type locality for genus
 * † Bonatitan reigi – type locality for species
 * † Bondesius – type locality for genus
 * † Bondesius ferox – type locality for species
 * † Bonitasaura – type locality for genus
 * † Bonitasaura
 * † Bonitasaura salgadoi – type locality for species
 * † Bonitasaura salgadoi
 * † Bositra
 * † Bositra ornati
 * † Bositra sp.
 * † Botryococcus
 * † Botryococcus sp.informal
 * † Botryococcus sp.
 * † Brachidontes
 * † Brachidontes sp.
 * † Brachiphyllum
 * † Brachiphyllum sp.
 * † Brachycerithium
 * † Brachycerithium evolutum
 * † Brachycerithium ferugloi
 * † Brachycerithium minus
 * † Brachychirotherium – or unidentified comparable form
 * † Brachychirotherium sp.
 * † Brachyoxylon
 * † Brachyoxylon sp.informal
 * † Brachyphyllum
 * † Brachyphyllum kachaikensis – type locality for species
 * † Brachyphyllum menendezi
 * † Brachyphyllum sp.
 * † Brachyphyllum sp. 1informal
 * † Brachyphyllum sp. 2informal
 * † Brachytrachelopan – type locality for genus
 * † Brachytrachelopan mesai – type locality for species
 * † Brandonia – type locality for genus
 * † Brandonia – or unidentified comparable form
 * † Brandonia intermedia – type locality for species
 * † Brandonia sp.
 * † Brenneripollis
 * † Brenneripollis sp.informal
 * † Brenneripollis sp. 1informal
 * † Brenneripollis sp. 2informal
 * † Bressanichnus – type locality for genus
 * † Bressanichnus
 * † Bressanichnus patagonicus – type locality for species
 * † Bressanichnus patagonicus
 * † Brodieia
 * † Brodieia alticarinata – or unidentified comparable form
 * † Brunoa
 * † Brunoa santarrosensis
 * † Buitreraptor – type locality for genus
 * † Buitreraptor gonzalezorum – type locality for species
 * † Cabochonicus
 * † Cabochonicus carbunculus – or unidentified comparable form
 * † Cabochonicus carbunculus
 * † Cacheutacicada – type locality for genus
 * † Cacheutacicada kurtzae – type locality for species
 * † Calibarichnus – type locality for genus
 * † Calibarichnus ayestarani – type locality for species
 * † Caligodinium
 * † Caligodinium sp.
 * † Callaiosphaeridium
 * † Callaiosphaeridium asymmetricum – or unidentified comparable form
 * † Callialasporites
 * † Callialasporites dampieri
 * † Callialasporites sp.informal
 * † Callialasporites spp.informal
 * † Callialasporites trilobatus
 * † Callianassa
 * † Callianassa burckhardi
 * † Callianassa burckhardti
 * † Callianassa peruviana – or unidentified related form
 * † Callianassa sp.
 * † Calliotropis – tentative report
 * † Calliotropis
 * † Calliotropis keideli – or unidentified comparable form
 * † Calliotropis keideli
 * † Calliotropis sp.
 * † Calliphylloceras
 * † Calliphylloceras bicicolae – or unidentified comparable form
 * † Calliphylloceras disputabile
 * † Caloceras
 * † Caloceras peruvianum – or unidentified comparable form
 * † Camarozonosporites
 * † Camarozonosporites ohaiensis
 * † Camarozonosporites spp.
 * † Caminchaia
 * † Caminchaia draghii – type locality for species
 * † Camptonectes – tentative report
 * † Camptonectes
 * † Camptonectes auritus – tentative report
 * † Camptonectes auritus
 * † Camptonectes mahuidaensis
 * † Camptonectes sp.
 * † Camptonectes subulatus – or unidentified comparable form
 * † Camptonectes tutorae – or unidentified related form
 * † Camptonectes tutorae
 * † Campylodoniscus – type locality for genus
 * † Campylodoniscus sp. – type locality for species
 * † Canavaria
 * † Canavaria finitima – or unidentified comparable form
 * † Canavaria naxensis – or unidentified comparable form
 * † Canavaria pulcherrima – or unidentified comparable form
 * † Candonopsis
 * † Candonopsis sp.
 * † Canningia
 * † Canningia pistica – or unidentified comparable form
 * † Canteronecta – type locality for genus
 * † Canteronecta irajae – type locality for species
 * † Canutus
 * † Canutus rennellensis
 * † Capsispora – type locality for genus
 * † Capsispora vulcanica – type locality for species
 * † Cardinia
 * † Cardinia andium
 * † Cardinia desestriata
 * † Cardiosyne – type locality for genus
 * † Cardiosyne
 * † Cardiosyne elegans – type locality for species
 * † Cardiosyne obesa – type locality for species
 * † Cardiosyne obesa
 * † Carmarozonosporites
 * † Carmarozonosporites microalveolatus
 * † Carnotaurus – type locality for genus
 * † Carnotaurus sastrei – type locality for species
 * † Carpolithes
 * † Carpolithes sp. 1informal
 * † Carpolithes sp. 2informal
 * † Carpolithus
 * † Carpolithus sp. 1informal
 * † Casamiquelia – type locality for genus
 * † Casamiquelia rionegrina – type locality for species
 * † Cassianella
 * † Cassianella peruana – or unidentified comparable form
 * † Cathartesaura – type locality for genus
 * † Cathartesaura anaerobica – type locality for species
 * † Catutosphinctes
 * † Catutosphinctes guenenakenensis – type locality for species
 * † Catutosphinctes guenenakenensis – or unidentified comparable form
 * † Catutosphinctes guenenakenensis
 * † Catutosphinctes sp.
 * † Cayeuxia
 * † Cayeuxia sp.
 * † Caypullisaurus
 * † Caypullisaurus bonapartei
 * † Cenechoia – type locality for genus
 * † Cenechoia
 * † Cenechoia paramillensis – type locality for species
 * † Cenechoia sulcata – type locality for species
 * † Ceratodus – or unidentified comparable form
 * † Ceratodus
 * † Ceratodus iheringi
 * † Ceratodus sp.
 * † Ceratosporites
 * † Ceratosporites equalis
 * † Ceratosporites setosus
 * † Ceratosporites sp.informal
 * † Ceratosporites sp. Ainformal
 * † Ceratosporites sp. Binformal
 * † Cerbia
 * † Cerbia tabulata
 * † Cerithium
 * † Cerithium heeri – or unidentified comparable form
 * † Cerodinium
 * † Cerodinium diebelii
 * † Cerodinium sp.
 * † Chacaicosaurus – type locality for genus
 * † Chacaicosaurus cayi – type locality for species
 * † Chacantuceras
 * † Chacantuceras ornatum
 * † Chaliminia – type locality for genus
 * † Chaliminia
 * † Chaliminia musteloides – type locality for species
 * † Chaliminia musteloides
 * † Challaia – type locality for genus
 * † Challaia
 * † Challaia cacheutensis
 * † Challaia magna – type locality for species
 * † Challaia multidentata – type locality for species
 * † Challaia striata
 * † Chanaresuchus – type locality for genus
 * † Chanaresuchus
 * † Chanaresuchus bonapartei – type locality for species
 * † Chanaresuchus bonapartei
 * † Chartronella
 * † Chartronella gradata
 * † Chiniquodon – type locality for genus
 * † Chiniquodon
 * † Chiniquodon sanjuanensis – type locality for species
 * † Chiniquodon sp.
 * † Chiniquodon theotonicus – type locality for species
 * † Chiniquodon theotonicus
 * † Chirotherium
 * † Chirotherium bairdii
 * † Chirotherium sp.
 * † Chlamys – tentative report
 * † Chlamys – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Chlamys
 * † Chlamys discors – or unidentified comparable form
 * † Chlamys robinaldina
 * † Chlamys textoria
 * † Choffatia
 * † Choffatia aequalis – or unidentified related form
 * † Choffatia gottschei
 * † Choffatia jupiter
 * † Choffatia neumayri – or unidentified related form
 * † Choffatia poculum – or unidentified comparable form
 * † Choffatia schilleri – type locality for species
 * † Choffatia sp.
 * † Choffatia subbackeriae
 * † Choffatia suborion
 * † Choicensisphinctes
 * † Choicensisphinctes australis
 * † Choicensisphinctes erinoides – or unidentified comparable form
 * † Choicensisphinctes erinoides
 * † Choicensisphinctes platyconus – type locality for species
 * † Choicensisphinctes platyconus – or unidentified comparable form
 * † Choicensisphinctes platyconus
 * † Choicensisphinctes windhauseni
 * † Chomotriletes
 * † Chomotriletes minor
 * † Chondrites
 * † Chondrites sp.
 * † Choristoceras
 * † Choristoceras marshi – or unidentified comparable form
 * † Choristoceras sp.
 * † Chromogisaurus – type locality for genus
 * † Chromogisaurus novasi – type locality for species
 * † Chubutemys
 * † Chubutemys copelloi
 * † Chubutisaurus – type locality for genus
 * † Chubutisaurus insignis – type locality for species
 * † Cibotiidites
 * † Cibotiidites sp.informal
 * † Cibotiumspora
 * † Cibotiumspora jurienensis
 * † Cicatricocisporites
 * † Cicatricocisporites ticoensis – or unidentified comparable form
 * † Cicatricosisporites
 * † Cicatricosisporites annulatus
 * † Cicatricosisporites australiensis
 * † Cicatricosisporites baqueroensis
 * † Cicatricosisporites cuneiformis
 * † Cicatricosisporites ethmos – or unidentified comparable form
 * † Cicatricosisporites giganteus
 * † Cicatricosisporites hallei – or unidentified comparable form
 * † Cicatricosisporites hughesi
 * † Cicatricosisporites hughesii
 * † Cicatricosisporites minutaestriatus – or unidentified comparable form
 * † Cicatricosisporites pramparoana
 * † Cicatricosisporites pseudotripartitus
 * † Cicatricosisporites sp.informal
 * † Cicatricosisporites sp.
 * † Cicatricosisporites Sp. 1informal
 * † Cicatricosisporites sp. 2informal
 * † Cicatricosisporites spp. 1informal
 * † Cicatricosisporites spp. 2informal
 * † Cicatricosisporites spp. Cinformal
 * † Cicatricosisporites ticoensis
 * † Cicatricosisporites venustus – or unidentified comparable form
 * † Cieneguiticeras
 * † Cieneguiticeras perlaevis
 * † Cingulatisporites
 * † Cingulatisporites sp.informal
 * † Cingutriletes
 * † Cingutriletes sp.informal
 * † Cinnamomun
 * † Cinnamomun heeri
 * † Cinulia
 * † Cinulia pauper
 * † Circulina
 * † Circulina sp.informal
 * † Circulodinium
 * † Circulodinium brevispinosum
 * † Circulodinium distinctum
 * † Cissites
 * † Cissites parvifolius
 * † Cladophlebis
 * † Cladophlebis australis
 * † Cladophlebis browniana – or unidentified comparable form
 * † Cladophlebis kurtzi – or unidentified comparable form
 * † Cladophlebis patagonica
 * † Cladophlebis sp. 1informal
 * † Cladophlebis sp. 2informal
 * † Cladophlebis sp. 3informal
 * † Cladophlebis sp. 4informal
 * † Clasmodosaurus – type locality for genus
 * † Clasmodosaurus spatula – type locality for species
 * † Classopollis
 * † Classopollis classoides – or unidentified comparable form
 * † Classopollis classoides
 * † Classopollis intrareticulatus
 * † Classopollis martinotti
 * † Classopollis simplex
 * † Classopollis sp.informal
 * † Classopollis sp.
 * † Classopollis spp.informal
 * † Clathropteris
 * † Clathropteris sp.
 * † Clathropteris sp. 1informal
 * † Clavamonocolpites
 * † Clavamonocolpites sp. 1informal
 * † Clavatipollenites
 * † Clavatipollenites hughesii
 * † Clavatipollenites rotundus – or unidentified comparable form
 * † Clavatipollenites sp.informal
 * † Clavatipollenites sp.
 * † Clavatipollenites spp.informal
 * † Clavatricolpites
 * † Clavatricolpites sp. 1informal
 * † Clavifera
 * † Clavifera sp.informal
 * † Clavifera sp. Ainformal
 * † Clavifera triplex – or unidentified comparable form
 * † Clavifera triplex
 * † Cleistosphaeridium
 * † Cleistosphaeridium sp.
 * † Cleoniceras
 * † Cleoniceras santacrucense – or unidentified comparable form
 * † Coelodus
 * † Coelodus toncoensis
 * † Colchidites
 * † Colchidites vulanensis
 * † Collignonastraea – tentative report
 * † Collignonastraea sp.
 * † Collotia
 * † Collotia falloti – or unidentified comparable form
 * † Coloniatherium – type locality for genus
 * † Coloniatherium
 * † Coloniatherium cilinskii – type locality for species
 * † Coloniatherium cilinskii
 * † Coloradisaurus – type locality for genus
 * † Coloradisaurus
 * † Coloradisaurus brevis – type locality for species
 * † Coloradisaurus brevis
 * † Colpomphalus – tentative report
 * † Colpomphalus
 * † Colpomphalus musacchioi
 * † Colpomphalus sp.
 * † Columastrea
 * † Columastrea antiqua
 * † Comahuesaurus – type locality for genus
 * † Comahuesaurus windhauseni – type locality for species
 * † Comahuesuchus – type locality for genus
 * † Comahuesuchus – or unidentified related form
 * † Comahuesuchus
 * † Comahuesuchus brachybuccalis – type locality for species
 * † Comahuesuchus brachybuccalis
 * † Comahuesuchus sp.
 * † Complexastraeopsis
 * † Complexastraeopsis caracolensis
 * † Complexastraeopsis sp.
 * † Conbaculatisporites
 * † Conbaculatisporites sp.
 * † Concavisporites
 * † Concavisporites laticrassus – or unidentified comparable form
 * † Concavisporites semiangulatus – or unidentified comparable form
 * † Concavisporites sp. Ainformal
 * † Concavissimisporites
 * † Concavissimisporites apiverrucatus
 * † Concavissimisporites penolaensis
 * † Concavissimisporites punctatus
 * † Concavissimisporites sp. Ainformal
 * † Concavissimisporites verrucosus
 * † Concavites – tentative report
 * † Concavites sp.
 * † Condorblatta – type locality for genus
 * † Condorblatta
 * † Condorblatta lutzae – type locality for species
 * † Condorblatta lutzae
 * † Condorchelys – type locality for genus
 * † Condorchelys antiqua – type locality for species
 * † Condorodon – type locality for genus
 * † Condorodon spanios – type locality for species
 * † Condorraptor – type locality for genus
 * † Condorraptor currumili – type locality for species
 * † Confossia
 * † Confossia vulgaris
 * † Coniopteris
 * † Coniopteris sp. 1informal
 * † Contignisporites
 * † Contignisporites burgerii
 * † Contignisporites cooksoniae
 * † Contignisporites cooksonii
 * † Contignisporites glebulentus
 * † Converrucosisporites
 * † Converrucosisporites sp. Ainformal
 * † Converrucosisporites sp. Binformal
 * † Convexastrea – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Convexastrea weaveri
 * † Convolutispora
 * † Convolutispora sp. 1informal
 * † Convolutispora sp. 2informal
 * † Coptospora
 * † Coptospora foveolata
 * † Coptospora spp. 1informal
 * † Coptospora spp. 2informal
 * † Copytus
 * † Copytus sp.
 * † Corbicula
 * † Corbicula pehuenchensis
 * † Corbicula sp.
 * † Corongoceras
 * † Corongoceras alternans – or unidentified comparable form
 * † Corongoceras sp.
 * † Coroniceras – tentative report
 * † Coroniceras
 * † Coroniceras alcinoe – or unidentified comparable form
 * † Coroniceras charlesi – or unidentified comparable form
 * † Coroniceras paolinae – or unidentified comparable form
 * † Coroniceras sp.
 * † Couperisporites
 * † Couperisporites lilianae
 * † Couperisporites sp. Ainformal
 * † Crassitricolporites
 * † Crassitricolporites sp.informal
 * † Craticularia
 * † Craticularia parallela
 * † Crescentiella – tentative report
 * † Crescentiella sp.
 * † Cretacacaeiporites
 * † Cretacacaeiporites polygonalis
 * † Cretacaeiporites
 * † Cretacaeiporites scabratus – or unidentified comparable form
 * † Cretacaeiporites scabratus
 * † Cribroperidinium
 * † Cribroperidinium edwarsii
 * † Cribroperidinium orthoceras
 * † Cribroperidinium sp.
 * † Cribroperidinium spp.
 * † Cribrospongia
 * † Cribrospongia cucullata
 * † Cribrospongia reticulata
 * † Cribrospongia sp.
 * † Cricosaurus
 * † Cricosaurus araucanensis – type locality for species
 * † Cricosaurus araucanensis
 * † Cricosaurus lithographicus – type locality for species
 * † Cricosaurus sp.
 * † Crioceratites
 * † Crioceratites sp.
 * † Cromptodon – type locality for genus
 * † Cromptodon mamiferoides – type locality for species
 * † Cronopio – type locality for genus
 * † Cronopio dentiacutus – type locality for species
 * † Crucella
 * † Crucella mijo
 * † Crybelosporites
 * † Crybelosporites australis – type locality for species
 * † Crybelosporites berberioides – or unidentified comparable form
 * † Crybelosporites punctatus – or unidentified comparable form
 * † Crybelosporites sp. Ainformal
 * † Crybelosporites striatus
 * † Crybelosporites stylosus
 * † Cryptaulax
 * † Cryptaulax damboreneae – type locality for species
 * † Cryptaulax damboreneae – or unidentified comparable form
 * † Cryptaulax damboreneae
 * † Cryptaulax redelii – type locality for species
 * † Cryptoclidus – or unidentified comparable form
 * † Cryptoclidus sp.
 * † Cryptocrioceras
 * † Cryptocrioceras yrigoyeni
 * † Cryptorhytis – or unidentified comparable form
 * † Cryptorhytis
 * † Cryptorhytis philippiana
 * † Cryptorhytis sp. Ainformal
 * † Ctenis
 * † Ctenis sp. 1informal
 * † Ctenocheles
 * † Ctenocheles sp.
 * † Ctenostreon
 * † Ctenostreon sp.
 * † Cubasphinctes
 * † Cubasphinctes cubanensis
 * † Cubasphinctes durangensis – or unidentified related form
 * † Cubasphinctes durangensis
 * † Cubasphinctes durangesis – or unidentified related form
 * † Cubasphinctes herreroduclouxi – or unidentified comparable form
 * † Cubasphinctes herreroduclouxi
 * † Cubaspidoceras
 * † Cubaspidoceras carribeanum – or unidentified related form
 * † Cucullaea – tentative report
 * † Cucullaea
 * † Cucullaea antarctica – or unidentified comparable form
 * † Cucullaea antarctica
 * † Cucullaea argentina
 * † Cucullaea gabrielis
 * † Cucullaea jaworskii – or unidentified comparable form
 * † Cucullaea jaworskii
 * † Cucullaea rocana
 * † Cucullaea rothi – or unidentified comparable form
 * † Cucullaea rothi
 * † Cucullaea sp.
 * † Cupanieidites – tentative report
 * † Cupanieidites sp.informal
 * † Cuyosuchus – type locality for genus
 * † Cuyosuchus huenei – type locality for species
 * † Cyatheacidites
 * † Cyatheacidites annulatus
 * † Cyatheacidites sp.informal
 * † Cyatheacidites sp.
 * † Cyatheacidites tectifera
 * † Cyathidites
 * † Cyathidites australis
 * † Cyathidites minor – or unidentified comparable form
 * † Cyathidites minor
 * † Cyathidites patagonicus
 * † Cyathidites punctatus – or unidentified comparable form
 * † Cyathidites sp.
 * † Cyathidites sp. Binformal
 * † Cyathophylliopsis
 * † Cyathophylliopsis delabechei
 * † Cycadites
 * † Cycadites sp. 1informal
 * † Cycadocarpidium
 * † Cycadocarpidium sp. 1informal
 * † Cycadocarpidium sp. 2informal
 * † Cycadocarpidium sp. 3informal
 * † Cycadolepis
 * † Cycadolepis coriacea
 * † Cycadolepis involuta
 * † Cycadolepis sp.
 * † Cycadopites
 * † Cycadopites follicularis
 * † Cycadopites nitidus
 * † Cycadopites punctatus
 * † Cycadopites sp.informal
 * † Cycadopites sp.
 * † Cycadopites spp.informal
 * † Cycadopites spp.
 * † Cyclusphaera
 * † Cyclusphaera euribei
 * † Cyclusphaera psilata
 * † Cyclusphaera radiata – or unidentified comparable form
 * † Cyclusphaera radiata
 * † Cyclusphaera sp.informal
 * † Cymatoceras
 * † Cymatoceras patagonicum – type locality for species
 * † Cymatoceras perstriatum
 * † Cymatoceras sp.
 * † Cynodontosuchus – type locality for genus
 * † Cynodontosuchus rothi – type locality for species
 * † Cynognathus
 * † Cynognathus crateronotus – type locality for species
 * † Cytherella
 * † Cytherella araucana – type locality for species
 * † Cytherura – tentative report
 * † Cytherura
 * † Cytherura argentinensis – type locality for species
 * † Cytherura jaguelensis – type locality for species
 * † Cytherura sp.
 * † Cyzicus
 * † Cyzicus codoensis – or unidentified related form
 * † Cyzicus sp.
 * † Czekanowskia
 * † Czekanowskia sp. 1informal
 * † Dakosaurus
 * † Dakosaurus andiniensis – type locality for species
 * † Dakosaurus andiniensis – or unidentified comparable form
 * † Dakosaurus andiniensis
 * † Dakosaurus sp.
 * † Darwinula
 * † Darwinula sp.
 * † Decliveites
 * † Decliveites crassicostatus
 * † Decliveites sp.
 * † Defarrariischnium – type locality for genus
 * † Defarrariischnium
 * † Defarrariischnium mapuchensis – type locality for species
 * † Defarrariischnium mapuchensis
 * † Delatorrichnus – type locality for genus
 * † Delatorrichnus goyenechei – type locality for species
 * † Delphinella
 * † Delphinella sp.
 * † Delpuenteblatta – type locality for genus
 * † Delpuenteblatta dangeloi – type locality for species
 * † Delpuentesyne – type locality for genus
 * † Delpuentesyne menendezi – type locality for species
 * † Deltamya
 * † Deltamya sp.
 * † Deltoidospora
 * † Deltoidospora australis
 * † Deltoidospora inconspicua
 * † Deltoidospora minor
 * † Deltoidospora sp.
 * † Deltoidospora sp. Ainformal
 * † Deltoidospora sp. Binformal
 * † Deltoidospora sp. Cinformal
 * † Deltoidospora sp. Dinformal
 * † Densoisporites
 * † Densoisporites corrugatus
 * † Densoisporites velatus
 * † Desmiophyllum
 * † Desmiophyllum sp. 1informal
 * † Dhondtichlamys
 * † Dhondtichlamys bagualensis
 * † Diademodon
 * † Diademodon tetragonus
 * † Diconodinium
 * † Diconodinium sp.
 * † Dicroidiopsis
 * † Dicroidiopsis sp. 1informal
 * † Dicroidium
 * † Dicroidium sp. 1informal
 * † Dicroidium sp. 2informal
 * † Dicroidium sp. 3informal
 * † Dicroidium sp. 4informal
 * † Dicroidium sp. 5informal
 * † Dicroidium sp. 6informal
 * † Dicroidium sp. 7informal
 * † Dicroloma – tentative report
 * † Dicroloma sp.
 * † Dictyophyllidites
 * † Dictyophyllidites mortoni
 * † Dictyophyllidites sp.informal
 * † Dictyophyllidites sp.
 * † Dictyophyllum
 * † Dictyophyllum sp. 1informal
 * † Dictyophyllum sp. 2informal
 * † Dictyothylakos
 * † Dictyothylakos sp.
 * † Dictyotosporites
 * † Dictyotosporites complex
 * † Dictyozamites
 * † Dictyozamites sp. 1informal
 * † Dictyozamites sp. 2informal
 * † Dictyozamites sp. 3informal
 * † Dictyozamites sp. 4informal
 * † Dictyozamites sp. 5informal
 * † Dictyozamites sp. 6informal
 * † Dicynodontipus – or unidentified comparable form
 * † Dicynodontipus sp.
 * † Dimorphosoma
 * † Dimorphosoma weaveri
 * † Dingodinium
 * † Dingodinium cerviculum
 * † Dinilysia – type locality for genus
 * † Dinilysia
 * † Dinilysia patagonica – type locality for species
 * † Dinilysia patagonica
 * † Dinilysia sp.
 * † Dinodontosaurus – type locality for genus
 * † Dinodontosaurus
 * † Dinodontosaurus pedroanum – type locality for species
 * † Dinodontosaurus pedroanum
 * † Dinodontosaurus platiceps
 * † Diplodon
 * † Diplodon bodenbenderi
 * † Diplodon sp.
 * † Dipoloceras
 * † Dipoloceras cristatum
 * † Dipoloceras elegans
 * † Disparilia
 * † Disparilia sp.
 * † Distichomeandra
 * † Distichomeandra austriaca – or unidentified comparable form
 * † Djurjuriceras
 * † Djurjuriceras catutosense
 * † Djurjuriceras sp.
 * † Dolichochampsa – type locality for genus
 * † Dolichochampsa
 * † Dolichochampsa minima – type locality for species
 * † Dolichochampsa minima
 * † Dozyia
 * † Dozyia venatorum
 * † Dreadnoughtus – type locality for genus
 * † Dreadnoughtus schrani – type locality for species
 * † Droltus
 * † Droltus hecatensis
 * † Dromomeron
 * † Dromomeron gigas – type locality for species
 * † Drusilasaura – type locality for genus
 * † Drusilasaura deseadensis – type locality for species
 * † Dryadopollis
 * † Dryadopollis argus – or unidentified comparable form
 * † Dryadopollis sp.informal
 * † Dryopterites
 * † Dryopterites problematicus
 * † Dubariceras
 * † Dubariceras argentinicum – type locality for species
 * † Dubariceras argentinicum
 * † Dubariceras freboldi
 * † Duraznoscarta – type locality for genus
 * † Duraznoscarta ramosa – type locality for species
 * † Echentaia
 * † Echentaia obesa – type locality for species
 * † Echimonocolpites
 * † Echimonocolpites sp.informal
 * † Echinatisporis
 * † Echinatisporis sp.
 * † Echinorhinus
 * † Echinorhinus sp.
 * † Echinosporis
 * † Echinosporis sp.
 * † Ecteninion – type locality for genus
 * † Ecteninion lunensis – type locality for species
 * † Eisenackia
 * † Eisenackia circumtabulata
 * † Ekrixinatosaurus – type locality for genus
 * † Ekrixinatosaurus novasi – type locality for species
 * † Elaltitan – type locality for genus
 * † Elaltitan lilloi – type locality for species
 * † Elateroplicites
 * † Elateroplicites africaensis
 * † Elatocladus
 * † Elatocladus sp.
 * † Elatocladus sp. 1informal
 * † Elatocladus sp. 2informal
 * † Elbretornis – type locality for genus
 * † Elbretornis
 * † Elbretornis bonapartei – type locality for species
 * † Elbretornis sp.
 * † Emileia
 * † Emileia multiformis
 * † Enantiornis – type locality for genus
 * † Enantiornis
 * † Enantiornis leali – type locality for species
 * † Enantiornis sp.
 * † Enoploclytia
 * † Enoploclytia sp.
 * † Entolium
 * † Entolium argentinum – or unidentified comparable form
 * † Entolium disciforme – tentative report
 * † Entolium disciforme
 * † Entolium lunare – or unidentified comparable form
 * † Entolium mahuidaensis
 * † Entolium mapuche – type locality for species
 * † Entolium mapuche – tentative report
 * † Entolium mapuche
 * † Entolium membranaceum
 * † Entolium molestus
 * † Entolium sp.
 * † Entylissa
 * † Entylissa sp.
 * † Eoabelisaurus – type locality for genus
 * † Eoabelisaurus mefi – type locality for species
 * † Eoamaltheus
 * † Eoamaltheus arayaensis – type locality for species
 * † Eoamaltheus arayaensis
 * † Eoamaltheus blancoensis – type locality for species
 * † Eoamaltheus blancoensis
 * † Eoamaltheus intermissus – type locality for species
 * † Eoamaltheus meridianus
 * † Eoamaltheus multicostatus – type locality for species
 * † Eoamaltheus multicostatus
 * † Eoamaltheus ovatoides – type locality for species
 * † Eoamaltheus ovatoides
 * † Eoamaltheus ovatus
 * † Eoamaltheus parameridianus – type locality for species
 * † Eoamaltheus parameridianus
 * † Eoamaltheus paraovatus – type locality for species
 * † Eoamaltheus paraovatus – or unidentified comparable form
 * † Eoamaltheus paraovatus
 * † Eoamaltheus sp.
 * † Eodromaeus – type locality for genus
 * † Eodromaeus murphi – type locality for species
 * † Eomarshallites
 * † Eomarshallites espinosum
 * † Eomarshallites hibridum
 * † Eopecten
 * † Eopecten hartzi – tentative report
 * † Eopecten sp.
 * † Eopecten velatus – or unidentified comparable form
 * † Eoraptor – type locality for genus
 * † Eoraptor lunensis – type locality for species
 * † Epachthosaurus – type locality for genus
 * † Epachthosaurus
 * † Epachthosaurus sciuttoi – type locality for species
 * † Epachthosaurus sciuttoi
 * † Epachthosaurus sp.
 * † Ephedra
 * † Ephedra verticillata – type locality for species
 * † Ephedripites
 * † Ephedripites caichiguensis
 * † Ephedripites multicostatus
 * † Ephedripites notensis
 * † Ephedripites sp.informal
 * † Ephedripites sp. 1informal
 * † Ephedripites sp. 2informal
 * † Epophioceras – tentative report
 * † Epophioceras
 * † Epophioceras cognitum – or unidentified comparable form
 * † Epophioceras sp.
 * † Equisetites
 * † Equisetites sp.
 * † Equisetites sp. 1informal
 * † Equisetosporites
 * † Equisetosporites albertensis – or unidentified comparable form
 * † Equisetosporites cancellatus – or unidentified comparable form
 * † Equisetosporites evidens – or unidentified comparable form
 * † Equisetosporites irregularis
 * † Equisetosporites multicostatus
 * † Equisetosporites ovatus
 * † Equisetosporites sp.informal
 * † Equisetosporites sp.
 * † Equisetosporites sp. 1informal
 * † Equisetosporites sp. 2informal
 * † Ericipites
 * † Ericipites microtectanum
 * † Ericipites scabratus
 * † Eriphyla – tentative report
 * † Eriphyla
 * † Eriphyla argentina
 * † Eriphyla meridiana
 * † Eriphyla sp.
 * † Erlansonisporites
 * † Erlansonisporites sparassis
 * † Erlansonisporites verrucatus – type locality for species
 * † Erlansonisporites verrucatus
 * † Eryma
 * † Eryma sulcata – or unidentified comparable form
 * † Eryphila
 * † Eryphila sp.
 * † Eselaevitrigonia
 * † Eselaevitrigonia regina
 * † Espora
 * † Espora Tipo Ainformal
 * † Espora Tipo Binformal
 * † Estheria
 * † Estheria sp.
 * † Etallonasteria
 * † Etallonasteria sp.
 * † Etea
 * † Etea carolinensis – or unidentified related form
 * † Euagassiceras
 * † Euagassiceras sp.
 * † Euaptetoceras
 * † Euaptetoceras amplectens
 * † Euaspidoceras
 * † Euaspidoceras ajax – or unidentified comparable form
 * † Euaspidoceras ajax
 * † Euaspidoceras depereti – or unidentified comparable form
 * † Euaspidoceras ovale – or unidentified related form
 * † Euaspidoceras raynaudi – or unidentified related form
 * † Euaspidoceras subbabeanum – or unidentified comparable form
 * † Euaspidoceras tarapacaense
 * † Euaspidoceras veranadaense
 * † Eubaculites
 * † Eubaculites sp.
 * † Euestheria
 * † Euestheria forbesi
 * † Eumorphotis
 * † Eumorphotis asapha
 * † Eumorphotis campbellorum
 * † Eunerinea
 * † Eunerinea mendozana
 * † Eurycephalites – tentative report
 * † Eurycephalites
 * † Eurycephalites extremus – or unidentified related form
 * † Eurycephalites extremus
 * † Eurycephalites gottschei – or unidentified related form
 * † Eurycephalites gottschei
 * † Eurycephalites involutus
 * † Eurycephalites rotundus – or unidentified comparable form
 * † Eurycephalites rotundus
 * † Eurycephalites sp.
 * † Eurycephalites vergarensis
 * † Eurynotus
 * † Eurynotus uspallatensis – type locality for species
 * † Eurysternum – tentative report
 * † Eurysternum neuquinum
 * † Euspira
 * † Euspira pueyrredonensis – or unidentified comparable form
 * † Euvirgalithacoceras
 * † Euvirgalithacoceras malarguense
 * † Exaeretodon
 * † Exaeretodon sp.
 * † Exelissa – tentative report
 * † Exelissa arcuatoconcava – type locality for species
 * † Exelissa arcuatoconcava
 * † Exochosphaeridium
 * † Exochosphaeridium bifidum
 * † Exochosphaeridium phragmites
 * † Exochosphaeridium sp.
 * † Exogyra
 * † Exogyra caudoni
 * † Exogyra couloni
 * † Exogyra latissimun
 * † Exogyra sp.
 * † Falcimytilus – tentative report
 * † Falcimytilus gigantoides
 * † Fanninoceras
 * † Fanninoceras fannini
 * † Fanninoceras latum – or unidentified comparable form
 * † Fanninoceras leptodiscus – type locality for species
 * † Fanninoceras sp.
 * † Fanninoceras sp. Ainformal
 * † Farcus
 * † Farcus graylockensis
 * † Fasolasuchus – type locality for genus
 * † Fasolasuchus tenax – type locality for species
 * † Favososporites
 * † Favososporites sp.
 * † Favososporites spinulosus – or unidentified comparable form
 * † Favrella
 * † Favrella americana
 * † Favrella wilckensi
 * † Feruglioa
 * † Feruglioa sp. 1informal
 * † Ferugliotherium – type locality for genus
 * † Ferugliotherium windhauseni – type locality for species
 * † Fisciniasporites
 * † Fisciniasporites brevilaesuratus – or unidentified comparable form
 * † Fisciniasporites sp.
 * † Fitzroya
 * † Fitzroya tertiaria
 * † Flabellaria
 * † Flabellaria sp.
 * † Flemingostrea
 * † Flemingostrea rionegrensis
 * † Florentinia
 * † Florentinia mantellii
 * † Florentinia sp.
 * † Foraminisporis – tentative report
 * † Foraminisporis
 * † Foraminisporis asymmetricus
 * † Foraminisporis dailyi
 * † Foraminisporis sp.
 * † Foraminisporis wonthaggiensis – or unidentified comparable form
 * † Foraminisporis wonthaggiensis
 * † Forcipites
 * † Forcipites longus
 * † Forcipites sabulosus
 * † Forcipites sp. Ainformal
 * † Foveogleicheniidites
 * † Foveogleicheniidites confossus
 * † Foveosporites
 * † Foveosporites foveoreticulatus
 * † Foveosporites sp. 1informal
 * † Foveosporites sp. 2informal
 * † Foveotriletes
 * † Foveotriletes parvirectus – or unidentified comparable form
 * † Fraxinoipollenites
 * † Fraxinoipollenites fragilis – or unidentified comparable form
 * † Fraxinoipollenites fragilis
 * † Frechiella
 * † Frechiella helvetica – or unidentified comparable form
 * † Frenelopsis
 * † Frenelopsis sp.
 * † Frenguelliella
 * † Frenguelliella inexspectata
 * † Frenguelliella sp.
 * † Frenguelliella tapiai – or unidentified comparable form
 * † Frenguelliella tapiai
 * † Frenguelliphlebia – type locality for genus
 * † Frenguelliphlebia labandeirai – type locality for species
 * † Frutexites
 * † Frutexites sp.
 * † Furcirhynchia
 * † Furcirhynchia trechmanni – or unidentified comparable form
 * † Futalognkosaurus – type locality for genus
 * † Futalognkosaurus dukei – type locality for species
 * † Gabonisporis
 * † Gabonisporis vigourouxii
 * † Galeacornea – tentative report
 * † Galeacornea sp.
 * † Gallegomorphoptila – type locality for genus
 * † Gallegomorphoptila
 * † Gallegomorphoptila acostai – type locality for species
 * † Gallegomorphoptila acostai
 * † Gallegomorphoptila breviptera – type locality for species
 * † Gallegomorphoptila gigantea – type locality for species
 * † Gallegomorphoptila kotejai – type locality for species
 * † Gallegomorphoptila pulcherrima – type locality for species
 * † Gallegosichnus – type locality for genus
 * † Gallegosichnus garridoi – type locality for species
 * † Gamerroites
 * † Gamerroites psilasaccus – or unidentified comparable form
 * † Gamerroites psilasaccus
 * † Gamerroites sp. Ainformal
 * † Gamerroites volkheimeri
 * † Garateastrea – type locality for genus
 * † Garateastrea
 * † Garateastrea bardanegrensis – type locality for species
 * † Garateastrea sp.
 * † Gasparinisaura – type locality for genus
 * † Gasparinisaura
 * † Gasparinisaura cincosaltensis – type locality for species
 * † Gasparinisaura cincosaltensis
 * † Gasparinisuchus – type locality for genus
 * † Gasparinisuchus
 * † Gasparinisuchus peirosauroides – type locality for species
 * † Gasparinisuchus peirosauroides
 * † Gasteroclupea
 * † Gasteroclupea branisai
 * † Gastrochaenolites
 * † Gastrochaenolites isp.
 * † Geinitzia
 * † Geinitzia sp.
 * † Gemelina – type locality for genus
 * † Gemelina
 * † Gemelina triangularis – type locality for species
 * † Gemelina triangularis
 * † Gemmatricolpites
 * † Gemmatricolpites sp.informal
 * † Gemmatricolpites sp.
 * † Genyodectes – type locality for genus
 * † Genyodectes serus – type locality for species
 * † Geosaurus
 * † Geosaurus araucaniensis
 * † Geosaurus sp.
 * † Gervillaria – tentative report
 * † Gervillaria
 * † Gervillaria alaeformis
 * † Gervillaria alatior
 * † Gervillaria palas
 * † Gervillaria pallas
 * † Gervillaria sp.
 * † Gervilleioperna
 * † Gervilleioperna turgida
 * † Gervillella
 * † Gervillella araucana – type locality for species
 * † Gervillella araucana
 * † Gervillella aviculoides
 * † Gervillella sp.
 * † Gervillia
 * † Gervillia anceps
 * † Gervillia sp.
 * † Giganotosaurus – type locality for genus
 * † Giganotosaurus
 * † Giganotosaurus carolinii – type locality for species
 * † Giganotosaurus carolinii
 * † Giganotosaurus sp.
 * † Ginkgocycadophytus
 * † Ginkgocycadophytus sp.informal
 * † Ginkgoites
 * † Ginkgoites skottsbergii
 * † Ginkgoites sp. 1informal
 * † Ginkgoites sp. 2informal
 * † Gleicheniidites
 * † Gleicheniidites aptianus – type locality for species
 * † Gleicheniidites juliensis
 * † Gleicheniidites rigidus – type locality for species
 * † Gleicheniidites senonicus
 * † Gleicheniidites serratus – type locality for species
 * † Gleicheniidites serratus
 * † Gleicheniidites sp.informal
 * † Gleicheniidites sp.
 * † Gleicheniidites sp. 1informal
 * † Gleicheniidites sp. 2informal
 * † Gleicheniidites sp. 3informal
 * † Gleicheniidites sp. Ainformal
 * † Gleicheniidites sp. Binformal
 * † Gleicheniidites sp. Cinformal
 * † Gleichenites
 * † Gleichenites gracilis – or unidentified related form
 * † Gleichenites micromerus – or unidentified comparable form
 * † Gleichenites san-martini
 * † Gleichenites sanmartini
 * † Gleichenites sp.informal
 * † Gleichenites sp.
 * † Gleichenites sp. 1informal
 * † Gleichenites sp. 2informal
 * † Globularia
 * † Globularia catanlilensis – or unidentified comparable form
 * † Globularia sp.
 * † Glomerula
 * † Glomerula lombricus
 * † Glomerula serpentina – or unidentified comparable form
 * † Glycymeris
 * † Glycymeris feruglioi – or unidentified comparable form
 * † Glycymeris feruglioli
 * † Glycymeris sp.
 * † Glyphea
 * † Glyphea oculata
 * † Glyphea sp.
 * † Gnetaceaepollenites
 * † Gnetaceaepollenites barghoornii
 * † Gnetaceaepollenites jansonii
 * † Gnetaceaepollenites sp.informal
 * † Gnetaceaepollenites sp.
 * † Goeppertella
 * † Goeppertella sp. 1informal
 * † Goldfussastrea – tentative report
 * † Goldfussastrea toarciensis – or unidentified comparable form
 * † Gondwanatherium – type locality for genus
 * † Gondwanatherium patagonicum – type locality for species
 * † Gondwanoperlidium – type locality for genus
 * † Gondwanoperlidium – tentative report
 * † Gondwanoperlidium
 * † Gondwanoperlidium argentina – type locality for species
 * † Gondwanoperlidium argentinarum – type locality for species
 * † Gondwanoperlidium mendozensis – type locality for species
 * † Goniomya
 * † Goniomya sp.
 * † Gonyaulacysta
 * † Gonyaulacysta spp.
 * † Gracilisuchus – type locality for genus
 * † Gracilisuchus
 * † Gracilisuchus stipanicicorum – type locality for species
 * † Gracilisuchus stipanicicorum
 * † Grallator
 * † Grallator sp.
 * † Grammatodon – tentative report
 * † Grammatodon
 * † Grammatodon costulatus
 * † Grammatodon sp.
 * † Grammatodon sulcatinus
 * † Grammatodon toyorensis – or unidentified comparable form
 * † Granulatisporites
 * † Granulatisporites sp.
 * † Granulatisporites spp.informal
 * † Grapnelispora
 * † Grapnelispora evansii
 * † Grapnelispora loncochensis
 * † Grapnelispora sp.
 * † Gregariella
 * † Gregariella amara – type locality for species
 * † Groebericeras
 * † Groebericeras bifrons – type locality for species
 * † Groebericeras bifrons
 * † Groebertherium – type locality for genus
 * † Groebertherium
 * † Groebertherium novasi – type locality for species
 * † Groebertherium stipanicici – type locality for species
 * † Groebertherium stipanicici
 * † Gryphaea
 * † Gryphaea sp.
 * † Gryphaeostrea
 * † Gryphaeostrea callophyla
 * † Gryphaeostrea callophylla
 * † Gryphaeostrea guaranitica
 * † Gualoscytina – type locality for genus
 * † Gualoscytina mayae – type locality for species
 * † Gualosuchus – type locality for genus
 * † Gualosuchus
 * † Gualosuchus reigi – type locality for species
 * † Gualosuchus reigi
 * † Guaymayenia – type locality for genus
 * † Guaymayenia paramillisensis – type locality for species
 * † Guidonia – tentative report
 * † Guidonia sp.
 * † Gyrochorte
 * † Gyrochorte comosa
 * † Gyrolepidoides
 * † Gyrolepidoides cuyanus
 * † Gyrolepidoides multistriatus
 * † Hadrosaurichnus – type locality for genus
 * † Hadrosaurichnus australis – type locality for species
 * † Hafniasphaera
 * † Hafniasphaera fluens – or unidentified comparable form
 * † Haloragacidites
 * † Haloragacidites harrisii
 * † Haloragacidites trioratus
 * † Hamulatisporis
 * † Hamulatisporis sp. Binformal
 * † Hamusina – tentative report
 * † Hamusina wahnishae – type locality for species
 * † Harpagodes
 * † Harpagodes sp.
 * † Harpax
 * † Harpax rapa
 * † Harpoceras
 * † Harpoceras sp.
 * † Harpoceras subexaratum – or unidentified related form
 * † Hatchericeras
 * † Hatchericeras patagonense
 * † Hatchericeras sp.
 * † Hausmannia
 * † Hausmannia papilio
 * † Hausmannia sp. 1informal
 * † Hecticoceras
 * † Hecticoceras discoides – or unidentified comparable form
 * † Hecticoceras discoides
 * † Hecticoceras hersilia
 * † Hecticoceras lairense – or unidentified related form
 * † Hecticoceras lairense – or unidentified comparable form
 * † Hecticoceras lairense
 * † Hecticoceras proximum
 * † Hecticoceras sp.
 * † Hecticoceras virguloides – or unidentified comparable form
 * † Hecticoceras virguloides
 * † Heidiphyllum
 * † Heidiphyllum sp. 1informal
 * † Helicancylus
 * † Helicancylus bonarellii – type locality for species
 * † Helicancylus bonarellii
 * † Helicancylus patagonicus
 * † Hemiprotosuchus – type locality for genus
 * † Hemiprotosuchus leali – type locality for species
 * † Henosferus – type locality for genus
 * † Henosferus molus – type locality for species
 * † Henrisporites
 * † Henrisporites elegans – type locality for species
 * † Henrisporites musachioi – type locality for species
 * † Henrisporites undulatus
 * † Herbstosaurus – type locality for genus
 * † Herbstosaurus pigmaeus – type locality for species
 * † Hermosablatta – type locality for genus
 * † Hermosablatta – tentative report
 * † Hermosablatta
 * † Hermosablatta crassatella – type locality for species
 * † Hermosablatta crassatella
 * † Hermosablatta pectinata – type locality for species
 * † Hermosablatta pygmaea – type locality for species
 * † Hermosablatta sp.
 * † Herrerasaurus – type locality for genus
 * † Herrerasaurus
 * † Herrerasaurus ischigualastensis – type locality for species
 * † Herrerasaurus ischigualastensis
 * † Herrerasaurus sp.
 * † Heteroceras
 * † Heteroceras elegans
 * † Heterodontosaurus – or unidentified comparable form
 * † Heterodontosaurus sp.
 * † Heteroterma
 * † Heteroterma sp. Ainformal
 * † Hibolithes
 * † Hibolithes jaculum – or unidentified related form
 * † Hildaites
 * † Hildaites sp.
 * † Hillichnus
 * † Hillichnus agrioensis
 * † Himalayites
 * † Himalayites sp.
 * † Holcoptychites
 * † Holcoptychites – type locality for speciesinformal
 * † Holcoptychites agrioensis
 * † Holcoptychites compressum
 * † Holcoptychites magdalenae – type locality for species
 * † Holcoptychites magdalenae – or unidentified comparable form
 * † Holcoptychites magdalenae
 * † Holcoptychites neuquensis – type locality for species
 * † Holcoptychites neuquensis
 * † Holcoptychites recopei – type locality for species
 * † Holcoptychites recopei – or unidentified comparable form
 * † Holcoptychites recopei
 * † Holcoptychites sp.
 * † Homoeoparonaella
 * † Homoeoparonaella reciproca
 * † Hoplites
 * † Hoplites vetustus
 * † Hoplitocrioceras – type locality for genus
 * † Hoplitocrioceras
 * † Hoplitocrioceras gentilii – type locality for species
 * † Hoplitocrioceras gentilii – or unidentified comparable form
 * † Hoplitocrioceras gentilii
 * † Hoplitocrioceras giovinei – type locality for species
 * † Hoplitocrioceras giovinei – or unidentified comparable form
 * † Hoplitocrioceras giovinei
 * † Hoplitocrioceras sp.
 * † Hoplitoplacenticeras
 * † Hoplitoplacenticeras plasticum
 * † Hoploparia
 * † Hoploparia antarctica
 * † Hoploparia arbei – type locality for species
 * † Hoploparia longimana
 * † Hoploparia sp.
 * † Horstisporites
 * † Horstisporites feruglioi – type locality for species
 * † Horstisporites harrisii – or unidentified comparable form
 * † Horstisporites iridodea – type locality for species
 * † Hughesisporites
 * † Hughesisporites patagonicus – type locality for species
 * † Hughesisporites patagonicus
 * † Hughesisporites rugulatus
 * † Huitrinipollenites
 * † Huitrinipollenites transitorius
 * † Huncalotis
 * † Huncalotis millaini – type locality for species
 * † Hydrobia
 * † Hydrobia sp.
 * † Hypophylloceras
 * † Hypophylloceras lestai
 * † Hypophylloceras sp.
 * † Hysteroceras
 * † Hysteroceras leanzai
 * † Hystrichosphaerina
 * † Hystrichosphaerina pulchrum
 * † Hystrichosphaerina schindewolfii
 * † Ignotosaurus – type locality for genus
 * † Ignotosaurus fragilis – type locality for species
 * † Ilexpollenites
 * † Ilexpollenites salamanquensis
 * † Ilokelesia – type locality for genus
 * † Ilokelesia aguadagrandensis – type locality for species
 * † Impagidinium
 * † Impagidinium sp.
 * † Inaperturopollenites
 * † Inaperturopollenites sp.
 * † Indosphinctes – tentative report
 * † Indosphinctes sp.
 * † Ingenierichnus – type locality for genus
 * † Ingenierichnus sierrai – type locality for species
 * † Iniskinites – tentative report
 * † Iniskinites
 * † Iniskinites cadoceroides – or unidentified comparable form
 * † Iniskinites crassus
 * † Iniskinites evolutus – type locality for species
 * † Iniskinites gulisanoi
 * † Iniskinites sp. Ainformal
 * † Iniskinites subtransiens – or unidentified related form
 * † Iniskinites subtransiens
 * † Inoceramus
 * † Inoceramus anomiaeformis – or unidentified related form
 * † Inoceramus mechanquilensis
 * † Inoceramus sp.
 * † Inoceramus urius – or unidentified comparable form
 * † Inoperna
 * † Inoperna sp.
 * † Interulobites
 * † Interulobites intraverrucatus
 * † Interulobites pseudoreticulatus – or unidentified comparable form
 * † Interulobites sp.informal
 * † Interulobites sp.
 * † Interulobites triangularis
 * † Intiornis – type locality for genus
 * † Intiornis inexpectatus – type locality for species
 * † Iotrigonia
 * † Iotrigonia sp.
 * † Isabelidinium
 * † Isabelidinium sp.
 * † Isaberrysaura – type locality for genus
 * † Isaberrysaura mollensis – type locality for species
 * † Isastrea
 * † Isastrea sp.
 * † Ischichucasyne
 * † Ischichucasyne cladocosta – type locality for species
 * † Ischigualastia – type locality for genus
 * † Ischigualastia
 * † Ischigualastia jenseni – type locality for species
 * † Ischigualastia sp.
 * † Ischyosporites
 * † Ischyosporites gremius
 * † Ischyosporites sp.informal
 * † Ischyosporites sp.
 * † Ischyosporites volkheimeri
 * † Isognomon
 * † Isognomon jupiter
 * † Isognomon leona
 * † Isognomon lotenoensis
 * † Isognomon nanus
 * † Isognomon ricordeanus
 * † Isognomon sp.
 * † Jabronella
 * † Jabronella michaelis – or unidentified related form
 * † Jachaleria – type locality for genus
 * † Jachaleria
 * † Jachaleria colorata – type locality for species
 * † Jachaleria platygnathus – type locality for species
 * † Jachaleria platygnathus
 * † Jaworskiella
 * † Jaworskiella sp.
 * † Johnstonia
 * † Johnstonia sp. 1informal
 * † Johnstonia sp. 2informal
 * † Johnstonia sp. 3informal
 * † Jonesia – tentative report
 * † Jonesia sp.
 * † Juraphyllites
 * † Juraphyllites libertus
 * † Juraphyllites planispira – or unidentified comparable form
 * † Juraphyllites sp.
 * † Jurassiphorus – tentative report
 * † Jurassiphorus triadicus – or unidentified comparable form
 * † Kachaikenia – type locality for genus
 * † Kachaikenia compuesta – type locality for species
 * † Kaikaifilusaurus – type locality for genus
 * † Kaikaifilusaurus calvoi – type locality for species
 * † Kalentera
 * † Kalentera sp.
 * † Kallosphaeridium
 * † Kallosphaeridium sp.
 * † Karakaschiceras
 * † Karakaschiceras attenuatus
 * † Karakaschiceras lycoris – type locality for species
 * † Karakaschiceras neumayri
 * † Karakaschiceras sp.
 * † Katepensaurus – type locality for genus
 * † Katepensaurus goicoecheai – type locality for species
 * † Kawasphenodon – type locality for genus
 * † Kawasphenodon expectatus – type locality for species
 * † Kilianiceras
 * † Kilianiceras damesi
 * † Kiokansium
 * † Kiokansium unituberculatum
 * † Klukisporites
 * † Klukisporites foveolatus
 * † Klukisporites labiatus – or unidentified comparable form
 * † Klukisporites sp.
 * † Klukisporites variegatus
 * † Kobyastraea
 * † Kobyastraea louisae – type locality for species
 * † Koilamasuchus – type locality for genus
 * † Koilamasuchus gonzalezdiazi – type locality for species
 * † Koloceras
 * † Koloceras talenkanum
 * † Kolymia
 * † Kolymia apollo – tentative report
 * † Kolymia apollo
 * † Kolymonectes
 * † Kolymonectes sp.
 * † Kolymonectes weaveri
 * † Kouphichnium
 * † Kouphichnium sp.
 * † Kurtziana
 * † Kurtziana sp. 1informal
 * † Kurtziana sp. 2informal
 * † Labeceras
 * † Labeceras crassetuberculatum
 * † Labeceras singulare
 * † Labeceras sp.
 * † Laevaptychus
 * † Laevaptychus sp.
 * † Laevigatosporites
 * † Laevigatosporites belfordii
 * † Laevigatosporites discordatus – or unidentified comparable form
 * † Laevigatosporites gracilis
 * † Laevigatosporites ovatus
 * † Laevigatosporites sp.
 * † Laevigatosporites vulgaris
 * † Lagerpeton – type locality for genus
 * † Lagerpeton
 * † Lagerpeton chanarensis – type locality for species
 * † Lagerpeton chanarensis
 * † Lagosuchus – type locality for genus
 * † Lagosuchus
 * † Lagosuchus sp.
 * † Lagosuchus talampayensis – type locality for species
 * † Lahillia
 * † Lahillia larseni
 * † Lahillia luisa
 * † Lahillia sp.
 * † Lahillia tetrica
 * † Lamarqueavis – type locality for genus
 * † Lamarqueavis australis – type locality for species
 * † Lamarquesaurus – type locality for genus
 * † Lamarquesaurus cabazai – type locality for species
 * † Laocoetis
 * † Laocoetis paradoxa
 * † Laocoetis procumbens
 * † Laocoetis sp.
 * † Lapampasaurus – type locality for genus
 * † Lapampasaurus cholinoi – type locality for species
 * † Laplatasaurus – type locality for genus
 * † Laplatasaurus
 * † Laplatasaurus araukanicus – type locality for species
 * † Laplatasaurus araukanicus
 * † Lariojablatta – type locality for genus
 * † Lariojablatta
 * † Lariojablatta chanarensis – type locality for species
 * † Lariojablatta neiffi – type locality for species
 * † Lariojaprosbole – type locality for genus
 * † Lariojaprosbole melchori – type locality for species
 * † Laurophyllum
 * † Laurophyllum hickenii – type locality for species
 * † Laurophyllum kurtzi
 * † Laurophyllum proteaefolium
 * † Lectavis – type locality for genus
 * † Lectavis bretincola – type locality for species
 * † Ledina
 * † Ledina lepida
 * † Leinkupal – type locality for genus
 * † Leinkupal laticauda – type locality for species
 * † Leiosphaeridia
 * † Leiosphaeridia hyalina
 * † Leiosphaeridia menendezii
 * † Leiosphaeridia sp. Binformal
 * † Leiosphaeridia spp. Einformal
 * † Leiosphaeridia spp. Finformal
 * † Leiosphaeridia spp. Ginformal
 * † Leiotriletes
 * † Leiotriletes regularis – or unidentified comparable form
 * † Leiotriletes sp.
 * † Leonardus – type locality for genus
 * † Leonardus cuspidatus – type locality for species
 * † Leonerasaurus – type locality for genus
 * † Leonerasaurus taquetrensis – type locality for species
 * † Lepidopteris
 * † Lepidopteris sp. 1informal
 * † Lepidotes
 * † Lepidotes pusillus
 * † Lepidotes sp.
 * † Leptolepidites
 * † Leptolepidites irregularis
 * † Leptolepidites macroverrucatus
 * † Leptolepidites macroverrucosus
 * † Leptolepidites major
 * † Leptolepidites proxigranulatus
 * † Leptolepidites sp.
 * † Leptolepidites verrucatus
 * † Leptomaria
 * † Leptomaria sp.
 * † Lessemsaurus – type locality for genus
 * † Lessemsaurus sauropoides – type locality for species
 * † Leufuichthys – type locality for genus
 * † Leufuichthys
 * † Leufuichthys minimus – type locality for species
 * † Leufuichthys minimus
 * † Lewalanipollis
 * † Lewalanipollis senectus
 * † Lewisuchus – type locality for genus
 * † Lewisuchus
 * † Lewisuchus admixtus – type locality for species
 * † Lewisuchus admixtus
 * † Leyesaurus – type locality for genus
 * † Leyesaurus marayensis – type locality for species
 * † Ligabueino – type locality for genus
 * † Ligabueino andesi – type locality for species
 * † Ligabuesaurus – type locality for genus
 * † Ligabuesaurus leanzai – type locality for species
 * † Liliacidites – tentative report
 * † Liliacidites
 * † Liliacidites crassibaculatus – or unidentified comparable form
 * † Liliacidites crassibaculatus
 * † Liliacidites crassilabratus
 * † Liliacidites kaitangataensis – or unidentified comparable form
 * † Liliacidites kaitangataensis
 * † Liliacidites regularis – or unidentified comparable form
 * † Liliacidites regularis
 * † Liliacidites sp.informal
 * † Liliacidites sp.
 * † Liliacidites sp. 1informal
 * † Liliacidites sp. 2informal
 * † Liliacidites sp. 3informal
 * † Liliacidites tectatus – or unidentified comparable form
 * † Liliacidites variegatus – or unidentified comparable form
 * † Liliacidites variegatus
 * † Liliacidites vermireticulatus
 * † Lilloettia
 * † Lilloettia steinmanni
 * † Lima
 * † Lima sp.
 * † Limatula
 * † Limatula sp.
 * † Limayichnus – type locality for genus
 * † Limayichnus
 * † Limayichnus major – type locality for species
 * † Limayichnus major
 * † Limaysaurus
 * † Limaysaurus tessonei – type locality for species
 * † Limaysaurus tessonei
 * † Limbicysta
 * † Limbicysta sp.
 * † Limenavis – type locality for genus
 * † Limenavis patagonica – type locality for species
 * † Linderochelys – type locality for genus
 * † Linderochelys rinconensis – type locality for species
 * † Linearis
 * † Linearis semicostata – or unidentified comparable form
 * † Linearis sp.
 * † Linguifolium
 * † Linguifolium sp. 1informal
 * † Linguifolium sp. 2informal
 * † Linonema
 * † Linonema calyx
 * † Lioceratoides
 * † Lioceratoides sp.informal
 * † Liopleurodon
 * † Liopleurodon sp.
 * † Liostrea
 * † Liostrea sp.
 * † Liparoceras
 * † Liparoceras bechei – or unidentified comparable form
 * † Liparoceras cheltiense – or unidentified comparable form
 * † Liquidambar
 * † Liquidambar integrifolium
 * † Lissoceratoides
 * † Lissoceratoides erato – or unidentified comparable form
 * † Lissoceratoides erato
 * † Lissochilus – or unidentified comparable form
 * † Lissochilus sp. nov.informal
 * † Lithacoceras – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Lithacoceras
 * † Lithacoceras picunleufuense – type locality for species
 * † Lithacoceras picunleufuense
 * † Lithacosphinctes
 * † Lithacosphinctes janus – or unidentified related form
 * † Lithacosphinctes janus
 * † Lithancylus
 * † Lithancylus guanacoense
 * † Lithodinia
 * † Lithodinia sp.
 * † Lithophaga
 * † Lithophaga sp.
 * † Lithotrochus
 * † Lithotrochus humboldtii
 * † Lithotrochus rothi – or unidentified comparable form
 * † Llanosuchus – type locality for genus
 * † Llanosuchus tamaensis – type locality for species
 * † Lobifolia
 * † Lobifolia sp. 1informal
 * † Lobonotus
 * † Lobonotus lobulata
 * † Lobonotus sp.
 * † Lomalatachelys – type locality for genus
 * † Lomalatachelys neuquina – type locality for species
 * † Lomasuchus – type locality for genus
 * † Lomasuchus palpebrosus – type locality for species
 * † Loncosaurus – type locality for genus
 * † Loncosaurus argentinus – type locality for species
 * † Longapertites
 * † Longapertites patagonicus
 * † Longapertites sp.
 * † Longapertites vaneendenburgi – or unidentified related form
 * † Lucina – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Lucina
 * † Lucina antarctandica
 * † Lucina laevis – tentative report
 * † Lucina neuquensis – or unidentified comparable form
 * † Lucina neuquensis
 * † Lucina sp.
 * † Luperosuchus – type locality for genus
 * † Luperosuchus
 * † Luperosuchus fractus – type locality for species
 * † Luperosuchus fractus
 * † Lusatisporis
 * † Lusatisporis sp.informal
 * † Lycettia
 * † Lycettia hypertrigona – type locality for species
 * † Lycettia hypertrigona
 * † Lycettia hypertrigonia
 * † Lycopodiumsporites
 * † Lycopodiumsporites austroclavatidites
 * † Lycopodiumsporites sp. 1informal
 * † Lycopodiumsporites sp. 2informal
 * † Lygistepollenites
 * † Lygistepollenites florinii
 * † Lygodiidites
 * † Lygodiidites sp. 1informal
 * † Lyriochlamys
 * † Lyriochlamys modestus
 * † Lyticoceras
 * † Lyticoceras pseudoregale
 * † Maccoyella
 * † Maccoyella sp.
 * † Macrogryphosaurus – type locality for genus
 * † Macrogryphosaurus gondwanicus – type locality for species
 * † Macrurosaurus – or unidentified comparable form
 * † Macrurosaurus sp.
 * † Maeandrostylis – tentative report
 * † Maeandrostylis jaworskii
 * † Malarguesaurus – type locality for genus
 * † Malarguesaurus
 * † Malarguesaurus florenciae – type locality for species
 * † Malarguesaurus florenciae
 * † Malletia
 * † Malletia pencanoides
 * † Mancusoblatta – type locality for genus
 * † Mancusoblatta pulchella – type locality for species
 * † Manidens – type locality for genus
 * † Manidens condorensis – type locality for species
 * † Manumiella – or unidentified comparable form
 * † Manumiella
 * † Manumiella complex
 * † Manumiella cretacea
 * † Manumiella druggii
 * † Mapucheastrea – type locality for genus
 * † Mapucheastrea
 * † Mapucheastrea andina – type locality for species
 * † Mapucheastrea andina
 * † Mapusaurus – type locality for genus
 * † Mapusaurus roseae – type locality for species
 * † Maputrigonia
 * † Maputrigonia pichimoncolensis
 * † Marasuchus
 * † Marasuchus lilloensis – type locality for species
 * † Marasuchus lilloensis
 * † Marattia
 * † Marattia sp. 1informal
 * † Marattisporites
 * † Marattisporites sacabratus
 * † Marattisporites scabratus
 * † Maresaurus – type locality for genus
 * † Maresaurus coccai – type locality for species
 * † Martinavis
 * † Martinavis minor – type locality for species
 * † Martinavis saltariensis – type locality for species
 * † Martinavis sp.
 * † Martinavis vincei – type locality for species
 * † Martinavis whetstonei – type locality for species
 * † Masculostrobus
 * † Masculostrobus sp. 1informal
 * † Massetognathus – type locality for genus
 * † Massetognathus
 * † Massetognathus pascuali – type locality for species
 * † Massetognathus pascuali
 * † Matonidium
 * † Matonidium sp. 1informal
 * † Matonisporites
 * † Matonisporites sp.informal
 * † Matonisporites sp.
 * † Mauisaurus – or unidentified comparable form
 * † Mauisaurus sp.
 * † Mecochirus
 * † Mecochirus robbianoi – type locality for species
 * † Megacucullaea
 * † Megacucullaea kraussi – or unidentified comparable form
 * † Megaloolithus
 * † Megaloolithus jabalpurensis – type locality for species
 * † Megaloolithus jabalpurensis
 * † Megalosaurus
 * † Megalosaurus chubutensis – type locality for species
 * † Megalosaurus inexpectatus – type locality for species
 * † Megaraptor – type locality for genus
 * † Megaraptor
 * † Megaraptor namunhuaiquii – type locality for species
 * † Megaraptor namunhuaiquii
 * † Meleagrinella
 * † Meleagrinella sp.
 * † Membranilarnacia
 * † Membranilarnacia angustivela
 * † Membranosphaera – tentative report
 * † Membranosphaera sp.informal
 * † Mendicodinium
 * † Mendicodinium sp.
 * † Mendocinichthys – type locality for genus
 * † Mendocinichthys brevis – type locality for species
 * † Mendozachelys – type locality for genus
 * † Mendozachelys wichmanni – type locality for species
 * † Mendozachorista – type locality for genus
 * † Mendozachorista volkheimeri – type locality for species
 * † Mendozasaurus – type locality for genus
 * † Mendozasaurus neguyelap – type locality for species
 * † Meretrix
 * † Meretrix chalcedonica
 * † Meridiceras
 * † Meridiceras amolanasense
 * † Meridiceras celericrescens
 * † Meridiceras densicostatum – type locality for species
 * † Meridiceras externum – or unidentified comparable form
 * † Mesocallista
 * † Mesocallista solitaria – or unidentified related form
 * † Mesocallista solitaria
 * † Mesosingeria
 * † Mesosingeria oblonga – type locality for species
 * † Mesungulatum – type locality for genus
 * † Mesungulatum
 * † Mesungulatum houssayi – type locality for species
 * † Mesungulatum lamarquensis – type locality for species
 * † Metaceratodus – or unidentified comparable form
 * † Metaceratodus sp.
 * † Metriorhynchus
 * † Metriorhynchus brachyrhynchus – or unidentified related form
 * † Metriorhynchus sp.
 * † Meyerella
 * † Meyerella rapax
 * † Mica
 * † Mica sp.informal
 * † Micracanthoceras
 * † Micracanthoceras sp.
 * † Micracanthoceras spinulosum
 * † Microcachrydites
 * † Microcachrydites sp.informal
 * † Microcachrydites spp.informal
 * † Microcachryidites – or unidentified comparable form
 * † Microcachryidites
 * † Microcachryidites antarcticus
 * † Microcachryidites sp.
 * † Microcachryridites
 * † Microcachryridites antarcticus
 * † Microcoelus – type locality for genus
 * † Microcoelus patagonicus – type locality for species
 * † Microderoceras
 * † Microderoceras birchi – or unidentified comparable form
 * † Microfoveolatosporis
 * † Microfoveolatosporis sp.
 * † Microfoveolatosporis sp. Ainformal
 * † Microphyllia – tentative report
 * † Microphyllia
 * † Microphyllia flemingi – or unidentified comparable form
 * † Microphyllia sp.
 * † Microreticulatisporites
 * † Microreticulatisporites sp.
 * † Microsuchus – type locality for genus
 * † Microsuchus schilleri – type locality for species
 * † Miltoceras – tentative report
 * † Miltoceras
 * † Miltoceras chilcaense – type locality for species
 * † Miltoceras chilcaense
 * † Miltoceras reductispinosum – type locality for species
 * † Miltoceras sellae – or unidentified comparable form
 * † Miltoceras sp.
 * † Miltoceras sp. Ainformal
 * † Minerisporites
 * † Minerisporites aequatus – type locality for species
 * † Minerisporites cheblii – type locality for species
 * † Minerisporites laceratus – type locality for species
 * † Minerisporites laceratus
 * † Minerisporites marginatus – or unidentified comparable form
 * † Minerisporites patagonicus
 * † Minerisporites sp.
 * † Minetrigonia – tentative report
 * † Minetrigonia multicostata
 * † Miomina
 * † Miomina mendozina – type locality for species
 * † Miomina riojana – type locality for species
 * † Mixtipecten
 * † Mixtipecten chilensis
 * † Modiolus – tentative report
 * † Modiolus
 * † Modiolus baylei – tentative report
 * † Modiolus baylei
 * † Modiolus gerthi – type locality for species
 * † Modiolus gerthi
 * † Modiolus sp.
 * † Modiolus sp. Binformal
 * † Modiolus subsimplex – or unidentified comparable form
 * † Modiolus thiollierei – or unidentified comparable form
 * † Modiolus thiollieri – or unidentified comparable form
 * † Mohriopsis – or unidentified comparable form
 * † Mohriopsis plastica
 * † Mollesaurus – type locality for genus
 * † Mollesaurus
 * † Mollesaurus periallus
 * † Mollesaurus perihallus – type locality for species
 * † Momipites
 * † Momipites fragilis
 * † Monosulcites
 * † Monosulcites sp.
 * † Montlivaltia – tentative report
 * † Montlivaltia
 * † Montlivaltia kobyi – or unidentified related form
 * † Montlivaltia sp.
 * † Mucroserpula
 * † Mucroserpula mucroserpula
 * † Muderongia
 * † Muderongia brachialis
 * † Muderongia pariata – or unidentified comparable form
 * † Muderongia siciliana – or unidentified comparable form
 * † Muderongia spp.
 * † Muderongia staurota
 * † Muraenosaurus – or unidentified comparable form
 * † Muraenosaurus sp.
 * † Muricingulisporis
 * † Muricingulisporis annulatus – or unidentified comparable form
 * † Muricingulisporis annulatus
 * † Murospora
 * † Murospora sp.informal
 * † Murusraptor – type locality for genus
 * † Murusraptor barrosaensis – type locality for species
 * † Muscites
 * † Muscites sp.
 * † Muscites sp. 1informal
 * † Musculus
 * † Musculus sp.
 * † Mussaurus – type locality for genus
 * † Mussaurus
 * † Mussaurus patagonicus – type locality for species
 * † Mussaurus patagonicus
 * † Muyelensaurus – type locality for genus
 * † Muyelensaurus pecheni – type locality for species
 * † Myloceras
 * † Myloceras andinus
 * † Myloceras sp.
 * † Myoconcha
 * † Myoconcha neuquena
 * † Myoconcha sp.
 * † Myoconcha transatlantica
 * † Myophorella – tentative report
 * † Myophorella
 * † Myophorella araucana – or unidentified comparable form
 * † Myophorella araucana
 * † Myophorella garatei
 * † Myophorella sp.
 * † Myophorella tuberculata – or unidentified comparable form
 * † Myophorella volkheimeri
 * † Myrcia
 * † Myrcia acutifolia
 * † Myrcia santacruzensis
 * † Myriolepis
 * † Myriolepis sp.
 * † Myriophyllum
 * † Myriophyllum sp.
 * † Mytilaster
 * † Mytilaster edseli – tentative report
 * † Nacella – or unidentified comparable form
 * † Nacella ovata
 * † Naiaditaspora
 * † Naiaditaspora gemmata
 * † Najash – type locality for genus
 * † Najash rionegrina – type locality for species
 * † Namuncurania – type locality for genus
 * † Namuncurania malarguense – type locality for species
 * † Narambuenatitan – type locality for genus
 * † Narambuenatitan palomoi – type locality for species
 * † Naricopsina – tentative report
 * † Naricopsina sp.
 * † Nathorstia
 * † Nathorstia alata
 * † Natica
 * † Natica bulimoides – or unidentified comparable form
 * † Natica sp.
 * † Neilo
 * † Neilo pencana
 * † Neilo sp.
 * † Neiloides
 * † Neiloides rudis
 * † Neithea
 * † Neithea hauthali
 * † Nematosphaeropsis
 * † Nematosphaeropsis sp.
 * † Neoaetosauroides – type locality for genus
 * † Neoaetosauroides
 * † Neoaetosauroides engaeus – type locality for species
 * † Neoaetosauroides engaeus
 * † Neoastieria
 * † Neoastieria patagonica – type locality for species
 * † Neoastieria patagonica
 * † Neocalamites
 * † Neocalamites sp. 1informal
 * † Neocampylites
 * † Neocampylites delmontanus – or unidentified comparable form
 * † Neochallaia – type locality for genus
 * † Neochallaia
 * † Neochallaia leonensis
 * † Neochallaia tellecheai – type locality for species
 * † Neochetoceras – tentative report
 * † Neochetoceras sp.
 * † Neocomites – tentative report
 * † Neocomites
 * † Neocomites crassicostatus
 * † Neocomites sp.
 * † Neocomites transgrediens
 * † Neocorbicula
 * † Neocorbicula dinosauriorum
 * † Neocorbicula pehuenchensis
 * † Neocosmoceras
 * † Neocosmoceras sp.
 * † Neohoploceras
 * † Neohoploceras arnoldi
 * † Neomicrorbis – tentative report
 * † Neomicrorbis sp.
 * † Neoprionoceras
 * † Neoprionoceras girardoti
 * † Neoprionoceras henrici – or unidentified comparable form
 * † Neoraistrichia
 * † Neoraistrichia sp.
 * † Neoraistrickia
 * † Neoraistrickia sp 1informal
 * † Neoraistrickia sp.informal
 * † Neoraistrickia sp.
 * † Neoraistrickia sp. Ainformal
 * † Neoraistrickia truncatus
 * † Neorotodactylus – type locality for genus
 * † Neorotodactylus leonardii – type locality for species
 * † Neosemionotus
 * † Neosemionotus puntanus – type locality for species
 * † Neosemionotus puntanus
 * † Nerinea – tentative report
 * † Nerinea sp. 1informal
 * † Nerinea sp. 2informal
 * † Neuqueniceras
 * † Neuqueniceras bodenbenderi – or unidentified comparable form
 * † Neuqueniceras steinmanni
 * † Neuquenornis – type locality for genus
 * † Neuquenornis
 * † Neuquenornis volans – type locality for species
 * † Neuquenornis volans
 * † Neuquenraptor – type locality for genus
 * † Neuquenraptor argentinus – type locality for species
 * † Neuquensaurus – type locality for genus
 * † Neuquensaurus – tentative report
 * † Neuquensaurus – or unidentified related form
 * † Neuquensaurus
 * † Neuquensaurus australis – type locality for species
 * † Neuquensaurus australis
 * † Neuquensaurus robustus – type locality for species
 * † Neuquensaurus sp.
 * † Neuquensuchus – type locality for genus
 * † Neuquensuchus universitas – type locality for species
 * † Neuquinosmilia
 * † Neuquinosmilia gerthi – type locality for species
 * † Neuquinosmilia lospozonensis
 * † Neusticemys
 * † Neusticemys neuquina
 * † Nevesisporites
 * † Nevesisporites radiatus
 * † Nevesisporites vallatus
 * † Nicaniella – tentative report
 * † Nicaniella
 * † Nicaniella incae – or unidentified comparable form
 * † Nilsonia
 * † Nilsonia sp.informal
 * † Nilsonia sp.
 * † Noasaurus – type locality for genus
 * † Noasaurus leali – type locality for species
 * † Nodicoeloceras
 * † Nodicoeloceras sp.
 * † Nodomytilus – type locality for genus
 * † Nodomytilus trigonimimus – type locality for species
 * † Nodosisporites
 * † Nodosisporites crenimurus
 * † Nodosisporites macrobaculatus – type locality for species
 * † Nodosisporites macrobaculatus
 * † Nodosisporites sp.informal
 * † Nodosisporites sp.
 * † Noeggerathiopsis
 * † Noeggerathiopsis sp. 1informal
 * † Nopcsaspondylus – type locality for genus
 * † Nopcsaspondylus alarconensis – type locality for species
 * † Nothofagidites
 * † Nothofagidites aspera
 * † Nothofagidites dorotensis
 * † Nothofagidites kaitangataensis
 * † Nothofagidites nana
 * † Nothofagidites rocaensis – type locality for species
 * † Nothofagidites rocaensis
 * † Nothofagidites saraensis
 * † Notidanodon
 * † Notidanodon dentatus
 * † Notobatrachus – type locality for genus
 * † Notobatrachus
 * † Notobatrachus degiustoi – type locality for species
 * † Notobatrachus degiustoi
 * † Notobatrachus reigi – type locality for species
 * † Notoceratops – type locality for genus
 * † Notoceratops bonarelli – type locality for species
 * † Notocolossus – type locality for genus
 * † Notocolossus
 * † Notocolossus gonzalezparejasi – type locality for species
 * † Notocolossus gonzalezparejasi
 * † Notodectes
 * † Notodectes argentinus – type locality for species
 * † Notodonax
 * † Notodonax annae-eugenieae
 * † Notoemys – type locality for genus
 * † Notoemys
 * † Notoemys laticentralis – type locality for species
 * † Notoemys laticentralis
 * † Notohypsilophodon – type locality for genus
 * † Notohypsilophodon comodorensis – type locality for species
 * † Notonecta
 * † Notonecta mazzoniae – type locality for species
 * † Notonecta mazzoniae
 * † Notopamphagopsis – type locality for genus
 * † Notopamphagopsis – tentative report
 * † Notopamphagopsis bolivari – type locality for species
 * † Notopamphagopsis sp. 1informal
 * † Notopamphagopsis sp. 2informal
 * † Notopamphagopsis sp. 3informal
 * † Notosuchus – type locality for genus
 * † Notosuchus
 * † Notosuchus terrestris – type locality for species
 * † Notosuchus terrestris
 * † Nucula
 * † Nucula oblonga
 * † Nucula sp.
 * † Nucula suboblonga
 * † Nuculana
 * † Nuculana amuriensis – or unidentified comparable form
 * † Nuculana ovum – or unidentified comparable form
 * † Nuculana sp.
 * † Nymphaeites
 * † Nymphaeites sp.
 * † Nyssapollenites
 * † Nyssapollenites lanosus – or unidentified comparable form
 * † Nyssapollenites squamosus – or unidentified comparable form
 * † Obtusisporis
 * † Obtusisporis obtusangulus
 * † Obtusisporis sp. Ainformal
 * † Occisucysta
 * † Occisucysta tentoria
 * † Ochotochlamys
 * † Ochotochlamys sp.
 * † Ocuyuntaia – type locality for genus
 * † Ocuyuntaia arquata – type locality for species
 * † Ogmoconchella
 * † Ogmoconchella ellipsoidea
 * † Ogmoconchella sp.
 * † Olcostephanus
 * † Olcostephanus agrioensis – type locality for species
 * † Olcostephanus agrioensis
 * † Olcostephanus araucanus
 * † Olcostephanus atherstoni
 * † Olcostephanus boesei
 * † Olcostephanus curacoensis
 * † Olcostephanus duraznoensis – type locality for species
 * † Olcostephanus duraznoensis
 * † Olcostephanus laticosta – type locality for species
 * † Olcostephanus laticosta
 * † Olcostephanus minigrammi
 * † Olcostephanus permolestus
 * † Olcostephanus sp.
 * † Olcostephanus subandina
 * † Olcostephanus variegatus
 * † Oligosphaeridium
 * † Oligosphaeridium complex
 * † Oligosphaeridium dividuum
 * † Oligosphaeridium poculum
 * † Oligosphaeridium pulcherrimun
 * † Omphaloptycha
 * † Omphaloptycha jaworskii – or unidentified comparable form
 * † Oosterella
 * † Oosterella sp.
 * † Operculodinium
 * † Operculodinium centrocarpum
 * † Operculodinium radiculatum
 * † Opertochasma
 * † Opertochasma cazadoriana
 * † Ophiomorpha
 * † Ophiomorpha sp.
 * † Ophthalmosaurus
 * † Ophthalmosaurus icenicus – type locality for species
 * † Ophthalmosaurus monocharactus
 * † Ophthalmosaurus sp.
 * † Oplites
 * † Oplites wallichi – tentative report
 * † Oppelismilia – tentative report
 * † Oppelismilia sp.
 * † Orbiculiforma
 * † Orbiculiforma sp. Ainformal
 * † Orbiculiformella
 * † Orbiculiformella incognita – or unidentified comparable form
 * † Orbiculiformella sp.
 * † Ordinatus
 * † Ordinatus sp.
 * † Orkoraptor – type locality for genus
 * † Orkoraptor burkei – type locality for species
 * † Ornamentifera
 * † Ornamentifera echinata – or unidentified comparable form
 * † Ornamentifera sp.
 * † Ornamentifera sp. Ainformal
 * † Ornamentifera spp.informal
 * † Ornamentifera tuberculata – or unidentified comparable form
 * † Ornamentifera tuberculata
 * † Orthosphinctes – tentative report
 * † Orthosphinctes sp.
 * † Oscillopha
 * † Oscillopha hermanii
 * † Osmundacidites
 * † Osmundacidites sp.informal
 * † Osmundacidites sp.
 * † Osmundacidites sp. Ainformal
 * † Osmundacidites wellmanii – or unidentified comparable form
 * † Osmundacidites wellmanii
 * † Osmundacidites wellmannii
 * † Osmundocaulis
 * † Osmundocaulis sp. 1informal
 * † Ostrea – or unidentified comparable form
 * † Ostrea
 * † Ostrea damboreneae
 * † Ostrea minos
 * † Ostrea sp.
 * † Ostrea vulselloides
 * † Ostrea wilckensi
 * † Otapiria – tentative report
 * † Otapiria
 * † Otapiria dissimilis – or unidentified comparable form
 * † Otapiria neuquensis – type locality for species
 * † Otapiria neuquensis
 * † Otapiria pacifica
 * † Otapiria sp.
 * † Otozamites
 * † Otozamites archangelskyi – type locality for species
 * † Otozamites archangelskyi
 * † Otozamites patagonicus – type locality for species
 * † Otozamites sp.
 * † Otozamites sp. 1informal
 * † Otozamites sp. 2informal
 * † Otozamites sp. 3informal
 * † Otozamites sp. 4informal
 * † Otozamites sp. 5informal
 * † Otozamites volkheimeri
 * † Otuminisaurus – type locality for genus
 * † Otuminisaurus limensis – type locality for species
 * † Overosaurus – type locality for genus
 * † Overosaurus paradasorum – type locality for species
 * † Oxycerites – tentative report
 * † Oxycerites
 * † Oxycerites oxynotus
 * † Oxycerites sp.
 * † Oxycerites tenuistriatus
 * † Oxytoma
 * † Oxytoma cygnipes – or unidentified comparable form
 * † Oxytoma inequivalvis
 * † Oxytoma sp.
 * † Pachydermophyllum
 * † Pachydermophyllum sp. 1informal
 * † Pachydermophyllum sp. 2informal
 * † Pachydermophyllum sp. 3informal
 * † Pachymya
 * † Pachymya sp.
 * † Pachypteris
 * † Pachypteris crassa – type locality for species
 * † Pachypteris sanjuanina
 * † Pachypteris sp. 1informal
 * † Pacitrigonia
 * † Pacitrigonia de-stefanii
 * † Pacitrigonia hanetiana
 * † Pacitrigonia pampeana
 * † Pacitrigonia patagonica
 * † Pacitrigonia sobrali
 * † Pacitrigonia sp.
 * † Pagiophyllum
 * † Pagiophyllum sp. 1informal
 * † Pagiophyllum sp. 2informal
 * † Palaciosichnus – type locality for genus
 * † Palaciosichnus zettii – type locality for species
 * † Palaeastacus
 * † Palaeastacus sussexiensis
 * † Palaeastacus terraereginae
 * † Palaeocardita
 * † Palaeocardita peruviana – or unidentified comparable form
 * † Palaeochersis – type locality for genus
 * † Palaeochersis talampayensis – type locality for species
 * † Palaeocystodinium
 * † Palaeocystodinium lidiae
 * † Palaeocystodinium sp.
 * † Palaeomohria
 * † Palaeomohria patagonica
 * † Palaeomohria sp 1informal
 * † Palaeomohria Type 1informal
 * † Palaeomohria Type 2informal
 * † Palaeomohria Type 3informal
 * † Palaeoneilo
 * † Palaeoneilo elliptica – or unidentified comparable form
 * † Palaeoneilo galatea – tentative report
 * † Palaeoneilo patagonidica – or unidentified comparable form
 * † Palaeoneilo patagonidica
 * † Palaeophrynops – type locality for genus
 * † Palaeophrynops patagonicus – type locality for species
 * † Palaeophycus – or unidentified comparable form
 * † Palaeophycus
 * † Palaeophycus sp.
 * † Paleoanculosa
 * † Paleoanculosa sp.
 * † Paleoazolla – type locality for genus
 * † Paleoazolla patagonica – type locality for species
 * † Paleomutella
 * † Paleomutella sp.
 * † Palissya
 * † Palissya sp. 1informal
 * † Palissya sp. 2informal
 * † Palmophyllum
 * † Palmophyllum sp.
 * † Pamparaptor – type locality for genus
 * † Pamparaptor micros – type locality for species
 * † Panamericansaurus – type locality for genus
 * † Panamericansaurus schroederi – type locality for species
 * † Panopea – tentative report
 * † Panopea
 * † Panopea clausa – or unidentified comparable form
 * † Panopea clausa
 * † Panopea dupiniana
 * † Panopea gurgitis
 * † Panopea hauthali
 * † Panopea inferior
 * † Panopea neocomiensis
 * † Panopea pastorei
 * † Panopea patagonica
 * † Panopea simplex
 * † Panopea sp.
 * † Panopea sp. Cinformal
 * † Panphagia – type locality for genus
 * † Panphagia protos – type locality for species
 * † Pantanellium
 * † Pantanellium inornatum
 * † Parabatrachopus – type locality for genus
 * † Parabatrachopus argentina – type locality for species
 * † Paracuariceras – tentative report
 * † Paracuariceras sp.
 * † Paracytheridea
 * † Paracytheridea rionegrina – type locality for species
 * † Parahoplites
 * † Parahoplites nutfieldiensisex gr.
 * † Parahsuum
 * † Parahsuum izeense
 * † Parahsuum simplum
 * † Paralcidia – tentative report
 * † Paralcidia sp.
 * † Parallelodon
 * † Parallelodon groeberi – type locality for species
 * † Parallelodon groeberi
 * † Parallelodon riccardii – type locality for species
 * † Parallelodon riccardii – tentative report
 * † Parallelodon riccardii
 * † Parallelodon sp.
 * † Paranomia
 * † Paranomia sp.
 * † Parapallasiceras
 * † Parapallasiceras sp.
 * † Pararaucaria
 * † Pararaucaria sp. 1informal
 * † Parasyrinx – or unidentified comparable form
 * † Parasyrinx sp.
 * † Parodontoceras
 * † Parodontoceras sp.
 * † Paronaella
 * † Paronaella corpulenta – or unidentified related form
 * † Paronaella sp. 1informal
 * † Paronaella sp. 2informal
 * † Paronaella variabilis
 * † Parsimonia
 * † Parsimonia antiquata
 * † Parsimonia sp.
 * † Partschiceras
 * † Partschiceras striatocostatum
 * † Parvamussium
 * † Parvamussium pumilum
 * † Pasambaya
 * † Pasambaya tellecheai
 * † Pascualgnathus – type locality for genus
 * † Pascualgnathus polanskii – type locality for species
 * † Pasottia
 * † Pasottia andina
 * † Passendorferia
 * † Passendorferia sp.
 * † Passendorferia teresiformis – or unidentified comparable form
 * † Passendorferia teresiformis
 * † Patagocardia
 * † Patagocardia peterseni
 * † Patagoniaemys
 * † Patagoniaemys gasparinae – type locality for species
 * † Patagoniaemys gasparinae
 * † Patagonichnornis – type locality for genus
 * † Patagonichnornis venetiorum – type locality for species
 * † Patagoniophis – type locality for genus
 * † Patagoniophis
 * † Patagoniophis parvus – type locality for species
 * † Patagoniophis parvus
 * † Patagonykus – type locality for genus
 * † Patagonykus puertai – type locality for species
 * † Patagopteryx – type locality for genus
 * † Patagopteryx deferrariisi – type locality for species
 * † Patagosaurus – type locality for genus
 * † Patagosaurus
 * † Patagosaurus fariasi – type locality for species
 * † Patagosaurus fariasi
 * † Patagosaurus sp.
 * † Patagosuchus – type locality for genus
 * † Patagosuchus anielensis – type locality for species
 * † Paulckella
 * † Paulckella covacevichi
 * † Paulckella nepos
 * † Paxillitriletes
 * † Paxillitriletes kachaikense – type locality for species
 * † Paxillitriletes kachaikense
 * † Paxillitriletes menendezii
 * † Pecten
 * † Pecten sp.
 * † Pecten vacaensis
 * † Pediastrum
 * † Pediastrum boryanum – or unidentified related form
 * † Pediastrum sp.informal
 * † Pehuenchesuchus – type locality for genus
 * † Pehuenchesuchus enderi – type locality for species
 * † Pellegrinisaurus – type locality for genus
 * † Pellegrinisaurus powelli – type locality for species
 * † Peltoceras
 * † Peltoceras athleta – or unidentified comparable form
 * † Peltoceras athleta
 * † Peltoceras convexum – or unidentified comparable form
 * † Peltoceras convexum
 * † Peltoceratoides
 * † Peltoceratoides ballenaensis
 * † Peltoceratoides eugenii – or unidentified comparable form
 * † Peltoceratoides intercissus – or unidentified comparable form
 * † Peltoceratoides pressulus
 * † Peltocrioceras
 * † Peltocrioceras deeckei
 * † Peltocrioceras sp.
 * † Peninsulapollis
 * † Peninsulapollis askiniae
 * † Peninsulapollis gillii
 * † Peninsulapollis sp. 1informal
 * † Peninsulapollis sp. 2informal
 * † Peninsulapollis truswelliae – or unidentified comparable form
 * † Peninsulapollis truswellidae – or unidentified comparable form
 * † Peninsulapollis truswellidae
 * † Penion – or unidentified related form
 * † Penion proavitus
 * † Pennipollis
 * † Pennipollis peroreticulatus
 * † Pentacrinus
 * † Pentacrinus sp.
 * † Pentasauropus
 * † Pentasauropus sp.
 * † Percossmanella – type locality for genus
 * † Percossmanella steinmannii – type locality for species
 * † Perinopollenites
 * † Perinopollenites elatoides
 * † Periporopollenites
 * † Periporopollenites demarcatus
 * † Perisphinctes – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Perisphinctes
 * † Perisphinctes – type locality for species Ainformal
 * † Perisphinctes hillebrandti – or unidentified related form
 * † Perisphinctes hillebrandti – or unidentified comparable form
 * † Perisphinctes hillebrandti
 * † Perisphinctes mazuricus – or unidentified comparable form
 * † Perisphinctes mindowe – or unidentified comparable form
 * † Perisphinctes picteti – or unidentified comparable form
 * † Perisphinctes promiscuus – or unidentified related form
 * † Perisphinctes promiscuus
 * † Perisphinctes sp.
 * † Peristerothyris
 * † Peristerothyris columbiniformis
 * † Permoshurabia
 * † Permoshurabia argentina – type locality for species
 * † Peromonolites
 * † Peromonolites sp.informal
 * † Peromonolites sp. 1informal
 * † Peromonolites sp. 2informal
 * † Peromonolites vellosus
 * † Peronoceras
 * † Peronoceras sp.
 * † Perotrilites
 * † Perotrilites majus
 * † Perseophyllum
 * † Perseophyllum hauthalianum
 * † Petrobrasaurus – type locality for genus
 * † Petrobrasaurus puestohernandezi – type locality for species
 * † Phacelostylophyllum
 * † Phacelostylophyllum peruvianum – or unidentified comparable form
 * † Phellinites
 * † Phellinites sp. 1informal
 * † Phelopteria
 * † Phelopteria huitriniana – type locality for species
 * † Phelopteria huitriniana
 * † Phelopteria sp.
 * † Phoberocysta
 * † Phoberocysta neocomica
 * † Pholadomya
 * † Pholadomya agrioensis
 * † Pholadomya ambigua – or unidentified comparable form
 * † Pholadomya gigantea
 * † Pholadomya sp.
 * † Pholadomya spp.
 * † Pholidophorus
 * † Pholidophorus dentatus
 * † Pholidophorus vallejensis – type locality for species
 * † Phylites
 * † Phylites sp.
 * † Phylloceras
 * † Phylloceras hebertinum
 * † Phylloceras sp.
 * † Phylloceras trifoliatum – or unidentified comparable form
 * † Phyllocladidites
 * † Phyllocladidites mawsonii
 * † Phyllopachyceras
 * † Phyllopachyceras sp.
 * † Phyllopteroides
 * † Phyllopteroides laevis – or unidentified comparable form
 * † Phyllotheca
 * † Phyllotheca sp. 1informal
 * † Physa
 * † Physa wichmanni
 * † Physodoceras
 * † Physodoceras sp. Ainformal
 * † Piatnitzkyceras
 * † Piatnitzkyceras bonarellii – type locality for species
 * † Piatnitzkysaurus – type locality for genus
 * † Piatnitzkysaurus floresi – type locality for species
 * † Piatnitzyceras – tentative report
 * † Piatnitzyceras infirmum
 * † Pictetia
 * † Pictetia ovalis
 * † Picunichnus – type locality for genus
 * † Picunichnus benedettoi – type locality for species
 * † Pilosisporites
 * † Pilosisporites trichopapillosus
 * † Pilosisporites verus
 * † Pilula
 * † Pilula penita – or unidentified comparable form
 * † Pinna
 * † Pinna cretacia – or unidentified related form
 * † Pinna folium – or unidentified comparable form
 * † Pinna freneixae – or unidentified comparable form
 * † Pinna morenoi
 * † Pinna robinaldina
 * † Pinna sp.
 * † Pisanosaurus – type locality for genus
 * † Pisanosaurus mertii – type locality for species
 * † Pitekunsaurus – type locality for genus
 * † Pitekunsaurus macayai – type locality for species
 * † Placenticeras
 * † Placenticeras sp.
 * † Placostegus
 * † Placostegus conchophilus – or unidentified comparable form
 * † Placunopsis – tentative report
 * † Placunopsis
 * † Placunopsis pichi – type locality for species
 * † Placunopsis pichi
 * † Placunopsis sp.
 * † Placunopsis striatula – or unidentified comparable form
 * † Plagiostoma – tentative report
 * † Plagiostoma
 * † Plagiostoma sp.
 * † Planammatoceras
 * † Planammatoceras gerthi
 * † Planammatoceras planinsigne – or unidentified related form
 * † Planolites
 * † Planolites sp.
 * † Plateosaurus – or unidentified comparable form
 * † Plateosaurus sp.
 * † Platycythereis – tentative report
 * † Platycythereis velata – type locality for species
 * † Platyperla
 * † Platyperla marquati – type locality for species
 * † Platypterygius – type locality for genus
 * † Platypterygius hauthali – type locality for species
 * † Plegiocidaris
 * † Plegiocidaris sp.
 * † Plesiopinna
 * † Plesiopinna pampeana – type locality for species
 * † Pleuromeia
 * † Pleuromeia sp. 1informal
 * † Pleuromya – tentative report
 * † Pleuromya
 * † Pleuromya sp.
 * † Pleurotomaria
 * † Pleurotomaria gerthi
 * † Pleurotomaria sp.
 * † Plicacesta
 * † Plicacesta sp.
 * † Plicatula – tentative report
 * † Plicatula
 * † Plicatula georgiana
 * † Plicatula rapa
 * † Plicatula sp.
 * † Pliosaurus
 * † Pliosaurus patagonicus – type locality for species
 * † Pliosaurus sp.
 * † Podocarpidites
 * † Podocarpidites auriculatus
 * † Podocarpidites canadensis – or unidentified comparable form
 * † Podocarpidites elegans
 * † Podocarpidites elliptcus – or unidentified comparable form
 * † Podocarpidites ellipticus – or unidentified comparable form
 * † Podocarpidites ellipticus
 * † Podocarpidites futa
 * † Podocarpidites marwicki – or unidentified comparable form
 * † Podocarpidites marwickii
 * † Podocarpidites microreticuloidata
 * † Podocarpidites otagoensis – or unidentified comparable form
 * † Podocarpidites parviauriculata
 * † Podocarpidites parviauriculatus – or unidentified comparable form
 * † Podocarpidites parviauriculatus
 * † Podocarpidites rugulosus
 * † Podocarpidites sp.informal
 * † Podocarpidites sp.
 * † Podocarpidites sp. 2informal
 * † Podocarpidites spp.
 * † Podocarpidites verrucosus – or unidentified comparable form
 * † Podocarpidites vestitus – or unidentified comparable form
 * † Podocarpidites vestitus
 * † Podocarpus
 * † Podocarpus sp. 1informal
 * † Podosporites
 * † Podosporites sp. 1informal
 * † Podozamites – tentative report
 * † Podozamites
 * † Podozamites sp.
 * † Podozamites sp. 1informal
 * † Polycingulatisporites
 * † Polycingulatisporites reduncus – or unidentified comparable form
 * † Polygonatium
 * † Polygonatium sphaeroides
 * † Polypodiaceoisporites
 * † Polypodiaceoisporites elegans
 * † Polypodiidites
 * † Polypodiidites sp.
 * † Polypodiidites sp. Ainformal
 * † Polyptychoceras
 * † Polyptychoceras sp.
 * † Popovigocimex – type locality for genus
 * † Popovigocimex yurii – type locality for species
 * † Portezueloemys – type locality for genus
 * † Portezueloemys patagonica – type locality for species
 * † Posidonotis
 * † Posidonotis cancellata
 * † Potrerillia – type locality for genus
 * † Potrerillia nervosa – type locality for species
 * † Potrerilloblatta – type locality for genus
 * † Potrerilloblatta stipanicici – type locality for species
 * † Potrerilloxyela – type locality for genus
 * † Potrerilloxyela menendezi – type locality for species
 * † Praechlamys – tentative report
 * † Praechlamys
 * † Praechlamys valoniensis – or unidentified comparable form
 * † Praechlamys valoniensis
 * † Praeconocaryomma
 * † Praeconocaryomma sp.
 * † Praeconocaryomma whiteavesi – or unidentified comparable form
 * † Praeconosphaera
 * † Praeconosphaera sphaeraconus
 * † Praeleptosphinctes
 * † Praeleptosphinctes jaworskii – type locality for species
 * † Praeparvicingula
 * † Praeparvicingula elementaria
 * † Praeparvicingula sp. 1informal
 * † Praeparvicingula sp. 2informal
 * † Praeparvicingula tlellensis
 * † Priosphenodon – type locality for genus
 * † Priosphenodon
 * † Priosphenodon avelasi – type locality for species
 * † Priosphenodon minimus – type locality for species
 * † Priosphenodon minimus
 * † Priscaphander – or unidentified comparable form
 * † Priscaphander sp. Binformal
 * † Probainognathus – type locality for genus
 * † Probainognathus
 * † Probainognathus jenseni – type locality for species
 * † Probainognathus jenseni
 * † Procerithium
 * † Procerithium nodosum – type locality for species
 * † Procerithium nulloi – type locality for species
 * † Procerithium nulloi
 * † Prochelidella – type locality for genus
 * † Prochelidella
 * † Prochelidella argentinae – type locality for species
 * † Prochelidella cerrobarcinae – type locality for species
 * † Prochelidella portezuelae – type locality for species
 * † Profragum
 * † Profragum sanctacruzense
 * † Prohinnites
 * † Prohinnites sp.
 * † Propeamussium
 * † Propeamussium sp.
 * † Propomatoceros
 * † Propomatoceros semicostatus
 * † Propomatoceros sulcicarinatus
 * † Propylipollis
 * † Propylipollis ambiguus
 * † Propylipollis sp.
 * † Propylipollis tenuiexinus
 * † Propyllipollis – tentative report
 * † Propyllipollis sp.informal
 * † Protagelus
 * † Protagelus gratus
 * † Proteacidites – tentative report
 * † Proteacidites
 * † Proteacidites angulatus
 * † Proteacidites beddoesii
 * † Proteacidites parvus
 * † Proteacidites sp.informal
 * † Proteacidites sp.
 * † Proteacidites sp. Ainformal
 * † Proteacidites sp. Binformal
 * † Proteacidites subscabratus
 * † Proteacidites tenuiexinus
 * † Proterochampsa – type locality for genus
 * † Proterochampsa
 * † Proterochampsa barrionuevoi – type locality for species
 * † Proterochampsa barrionuevoi
 * † Proterochampsa sp.
 * † Protocallianassa
 * † Protocallianassa patagonica
 * † Protocardia
 * † Protocardia sp. – type locality for species
 * † Protogrammoceras
 * † Protogrammoceras normannianumex gr.
 * † Protogrammoceras sp.
 * † Protohemichenopus
 * † Protohemichenopus neuquensis
 * † Protophylum
 * † Protophylum rugosum – or unidentified comparable form
 * † Protosqualus
 * † Protosqualus argentinensis – type locality for species
 * † Proxapertites – tentative report
 * † Proxapertites sp.informal
 * † Pseudaptetoceras
 * † Pseudaptetoceras moerickei
 * † Pseudaptetoceras tricolore – type locality for species
 * † Pseudaptetoceras tricolore
 * † Pseudhesperosuchus – type locality for genus
 * † Pseudhesperosuchus jachaleri – type locality for species
 * † Pseudhimalayites
 * † Pseudhimalayites subpretiosus
 * † Pseudobeaconia – type locality for genus
 * † Pseudobeaconia
 * † Pseudobeaconia bracaccinii – type locality for species
 * † Pseudobeaconia celestae – type locality for species
 * † Pseudobeaconia celestae
 * † Pseudobeaconia cuyana
 * † Pseudobeaconia elegans – type locality for species
 * † Pseudoceratium
 * † Pseudoceratium pelliferum
 * † Pseudoceratium sp.
 * † Pseudochampsa
 * † Pseudochampsa ischigualastensis – type locality for species
 * † Pseudocoeniopsis
 * † Pseudocoeniopsis wintoni – or unidentified comparable form
 * † Pseudoctenis
 * † Pseudoctenis sp. 1informal
 * † Pseudofavrella – tentative report
 * † Pseudofavrella
 * † Pseudofavrella angulatiformis
 * † Pseudofavrella garatei
 * † Pseudofavrella sp.
 * † Pseudolagosuchus – type locality for genus
 * † Pseudolagosuchus
 * † Pseudolagosuchus major – type locality for species
 * † Pseudolagosuchus major
 * † Pseudolimea
 * † Pseudolimea angusta
 * † Pseudolimea riccardii
 * † Pseudolimea symmetricainformal
 * † Pseudolissoceras
 * † Pseudolissoceras zitteli
 * † Pseudomelania
 * † Pseudomelania feruglioi
 * † Pseudomelania sp.
 * † Pseudopantanellium
 * † Pseudopantanellium floridum
 * † Pseudopecten
 * † Pseudopecten equivalvis – or unidentified related form
 * † Pseudopeltoceras
 * † Pseudopeltoceras chauvinianum – or unidentified comparable form
 * † Pseudosilesites
 * † Pseudosilesites russoi
 * † Pseudotoites
 * † Pseudotoites argentinus – type locality for species
 * † Pseudotoites sphaeroceroides
 * † Pseudotoites transatlanticus – type locality for species
 * † Pseudowinterapollis
 * † Pseudowinterapollis couperi
 * † Psilatricolpites
 * † Psilatricolpites inargutus
 * † Psilatricolpites patagonicus
 * † Psilatricolpites sp.informal
 * † Psilatricolpites sp.
 * † Psilatricolpites sp. 1informal
 * † Psilatricolporites
 * † Psilatricolporites salamanquensis – or unidentified comparable form
 * † Psilatricolporites sp.informal
 * † Psilatricolporites sp.
 * † Psilatricolporites sp. 1informal
 * † Psilatricolporites sp. 2informal
 * † Psiloceras
 * † Psiloceras rectocosatum – or unidentified comparable form
 * † Psiloceras rectocostatum – or unidentified comparable form
 * † Psiloceras tilmanni – or unidentified comparable form
 * † Pteraichnus
 * † Pteraichnus sp.
 * † Pterodaustro – type locality for genus
 * † Pterodaustro guinazui – type locality for species
 * † Pteromyrtea
 * † Pteromyrtea sp.
 * † Pteroperna
 * † Pteroperna sp.
 * † Pterophyllum
 * † Pterophyllum sp. 1informal
 * † Pterophyllum trichomatosum
 * † Pterotrigonia
 * † Pterotrigonia cazadoriana
 * † Pterotrigonia coihuicoensis
 * † Pterotrigonia windhauseniana
 * † Pteruchus
 * † Pteruchus sp. 1informal
 * † Ptilophyllum
 * † Ptilophyllum acutifolium
 * † Ptilophyllum angustus – type locality for species
 * † Ptilophyllum antarcticum
 * † Ptilophyllum sp. 1informal
 * † Ptilophyllum sp. 2informal
 * † Ptilophyllum sp. 3informal
 * † Ptilophyllum sp. 4informal
 * † Ptilophyllum valvatum
 * † Ptychoceras
 * † Ptychoceras sp.
 * † Ptychomya
 * † Ptychomya koeneni
 * † Ptychomya sp.
 * † Ptychomya vacaensis
 * † Pucapristis
 * † Pucapristis branisi
 * † Puchenquia – tentative report
 * † Puchenquia
 * † Puchenquia compressa – type locality for species
 * † Puchenquia compressa
 * † Puchenquia malarguensis
 * † Puchenquia mendozana – type locality for species
 * † Puchenquia mendozana
 * † Puertasaurus – type locality for genus
 * † Puertasaurus reuili – type locality for species
 * † Pugnellus
 * † Pugnellus hauthali – or unidentified related form
 * † Pulchellablatta – type locality for genus
 * † Pulchellablatta nana – type locality for species
 * † Pulvinites
 * † Pulvinites liasicus – type locality for species
 * † Pulvinites liasicus
 * † Pulvinites sp.
 * † Punctatisporites
 * † Punctatisporites scabratus
 * † Punctatisporites sp.informal
 * † Purranisaurus – type locality for genus
 * † Purranisaurus potens – type locality for species
 * † Puzosia
 * † Puzosia vegaensis
 * † Pycnodonte
 * † Pycnodonte groeberi
 * † Pycnodonte mendozana
 * † Pycnodonte pyrotheriorum
 * † Pycnodonte regionis
 * † Pycnodonte vesicularis
 * † Pyropsis
 * † Pyropsis sp.
 * † Quadraplanus
 * † Quadraplanus brossus
 * † Quetecsaurus – type locality for genus
 * † Quetecsaurus rusconii – type locality for species
 * † Quilmesaurus – type locality for genus
 * † Quilmesaurus curriei – type locality for species
 * † Quirogatherium – type locality for genus
 * † Quirogatherium major – type locality for species
 * † Racemonocolpites – tentative report
 * † Racemonocolpites sp.informal
 * † Radstockiceras
 * † Radstockiceras sp.
 * † Radulonectites
 * † Radulonectites sosneadoensis
 * † Rastellum
 * † Rastellum clarae
 * † Rayososaurus – type locality for genus
 * † Rayososaurus agrioensis – type locality for species
 * † Rehmannia
 * † Rehmannia brancoi
 * † Rehmannia patagoniense – or unidentified comparable form
 * † Rehmannia patagoniense
 * † Rehmannia patagoniensis – or unidentified comparable form
 * † Rehmannia patagoniensis
 * † Rehmannia paucicostata
 * † Rehmannia stehni
 * † Reigitherium – type locality for genus
 * † Reigitherium
 * † Reigitherium bunodontum – type locality for species
 * † Reigitherium bunodontum
 * † Reineckeia – tentative report
 * † Reineckeia
 * † Reineckeia sp.
 * † Reineckeia stehni
 * † Reineckeia steinmanni
 * † Reineckeia striolata
 * † Restrepophyllum – type locality for genus
 * † Restrepophyllum chiguoides – type locality for species
 * † Reticulatisporites
 * † Reticulatisporites arcuatus
 * † Reticuloidosporites
 * † Reticuloidosporites tenellis
 * † Reticulosporis
 * † Reticulosporis sp. 1informal
 * † Reticulosporis sp. 2informal
 * † Reticulosporis sp. 3informal
 * † Retidiporites
 * † Retidiporites camachoii
 * † Retimonocolpites
 * † Retimonocolpites peroreticulatus – or unidentified comparable form
 * † Retimonocolpites peroreticulatus
 * † Retimonocolpites sp.informal
 * † Retimonocolpites sp.
 * † Retimonocolpites spp.informal
 * † Retiophyllia – tentative report
 * † Retiophyllia sp.
 * † Retitricolporites
 * † Retitricolporites chubutensis
 * † Retitricolporites sp. 1informal
 * † Retitriletes
 * † Retitriletes austroclavatidites – or unidentified comparable form
 * † Retitriletes austroclavatidites
 * † Retitriletes baqueroense
 * † Retitriletes boqueroense
 * † Retitriletes douglasii
 * † Retitriletes eminulus – or unidentified comparable form
 * † Retitriletes sp.informal
 * † Retitriletes sp.
 * † Retitriletes sp. Ainformal
 * † Retroceramus
 * † Retroceramus galoi – or unidentified related form
 * † Retroceramus galoi
 * † Retroceramus patagonicus – or unidentified comparable form
 * † Retroceramus patagonicus
 * † Retroceramus stehni – type locality for species
 * † Rhabdocolpus
 * † Rhabdocolpus patagoniensis – type locality for species
 * † Rhizocorallium
 * † Rhizocorallium sp.
 * † Rhizomopteris
 * † Rhizomopteris sp. 1informal
 * † Rhoipites
 * † Rhoipites baculatus
 * † Rhoipites minusculus
 * † Rhoipites sp.
 * † Rhoipites sp. 1informal
 * † Rhoipites sp. Binformal
 * † Rhynchodiniopsis
 * † Rhynchodiniopsis sp.
 * † Rhynchosauroides
 * † Rhynchosauroides sp.
 * † Ricciopsis
 * † Ricciopsis grandensis – type locality for species
 * † Rigalites – type locality for genus
 * † Rigalites ischigualastianus – type locality for species
 * † Rinconsaurus – type locality for genus
 * † Rinconsaurus caudamirus – type locality for species
 * † Rinetrigonia
 * † Rinetrigonia bustamantina
 * † Rinetrigonia wilckensi
 * † Rinetrigonia windhauseniana
 * † Riojasaurus – type locality for genus
 * † Riojasaurus
 * † Riojasaurus incertus – type locality for species
 * † Riojasaurus incertus
 * † Riojasuchus – type locality for genus
 * † Riojasuchus tenuisceps – type locality for species
 * † Rionegrochelys – type locality for genus
 * † Rionegrochelys caldieroi – type locality for species
 * † Rionegrophis – type locality for genus
 * † Rionegrophis madtsoioides – type locality for species
 * † Rocasaurus – type locality for genus
 * † Rocasaurus – or unidentified comparable form
 * † Rocasaurus muniozi – type locality for species
 * † Rocasaurus sp.
 * † Rogerbaletichnus – type locality for genus
 * † Rogerbaletichnus
 * † Rogerbaletichnus aguilerai – type locality for species
 * † Rogerbaletichnus aguilerai
 * † Rogersia
 * † Rogersia australis – type locality for species
 * † Rosannia
 * † Rosannia manika
 * † Rotularia
 * † Rotularia sp.
 * † Roudairia
 * † Roudairia pampaensis
 * † Rousea
 * † Rousea microreticulata
 * † Rousea patagonica – or unidentified comparable form
 * † Rousea patagonica
 * † Rousea sp.informal
 * † Rousea sp.
 * † Rouseisporites
 * † Rouseisporites reticulatus
 * † Ruffordia
 * † Ruffordia sp. 1informal
 * † Ruffordiaspora
 * † Ruffordiaspora australiensis
 * † Ruffordiaspora cardielensis
 * † Ruffordiaspora ludbrookiae
 * † Ruffordiaspora Sp. 1informal
 * † Ruffordiaspora sp. Ainformal
 * † Ruffordiaspora ticoensis – or unidentified comparable form
 * † Ruffordiaspora ticoensis
 * † Rugubivesiculites
 * † Rugubivesiculites sp. 2informal
 * † Rugubivesiculites spp. 1informal
 * † Rugulatisporites
 * † Rugulatisporites chubutensis
 * † Rugulatisporites neuquenensis
 * † Rugulatisporites sp.informal
 * † Ruprechtia – tentative report
 * † Ruprechtia castilloensis – type locality for species
 * † Rutitrigonia
 * † Rutitrigonia kauffmani
 * † Saaloscytina – type locality for genus
 * † Saaloscytina carmonae – type locality for species
 * † Saccella
 * † Saccella tumida – or unidentified comparable form
 * † Sagenopteris
 * † Sagenopteris sp. 1informal
 * † Sagenopteris sp. 2informal
 * † Sakawairhynchia
 * † Sakawairhynchia marokopana
 * † Sakawairhynchia mokauensis – or unidentified comparable form
 * † Salfitichnus – type locality for genus
 * † Salfitichnus mentoor – type locality for species
 * † Salix
 * † Salix proteafolia
 * † Salpingoporella
 * † Salpingoporella sp.
 * † Saltasaurus – type locality for genus
 * † Saltasaurus loricatus – type locality for species
 * † Saltenia – type locality for genus
 * † Saltenia
 * † Saltenia ibanezi – type locality for species
 * † Saltenia ibanezi
 * † Salvinia
 * † Salvinia preauriculata – or unidentified related form
 * † Samaroblatta
 * † Samaroblatta corrientesina – type locality for species
 * † Samaroblatta gualoensis – type locality for species
 * † Samaroblatta sp.
 * † Sanjuansaurus – type locality for genus
 * † Sanjuansaurus gordilloi – type locality for species
 * † Sanmartinoceras
 * † Sanmartinoceras africanum
 * † Sanmartinoceras cardielense
 * † Sanmartinoceras sp.
 * † Sanmartinoceras sp. Ainformal
 * † Sanmartinoceras sp. Binformal
 * † Sanmartinoceras walshense
 * † Sarcinella
 * † Sarcinella occidentalis
 * † Sarcinella sp.
 * † Sarmientichnus – type locality for genus
 * † Sarmientichnus scagliai – type locality for species
 * † Sarmientosaurus – type locality for genus
 * † Sarmientosaurus musacchioi – type locality for species
 * † Sassafras
 * † Sassafras acutilobum
 * † Sauropodichnus – type locality for genus
 * † Sauropodichnus
 * † Sauropodichnus giganteus – type locality for species
 * † Sauropodichnus giganteus
 * † Saurosuchus – type locality for genus
 * † Saurosuchus
 * † Saurosuchus galilei – type locality for species
 * † Saurosuchus galilei
 * † Scaphonyx – tentative report
 * † Scaphonyx
 * † Scaphonyx sp.
 * † Scenedesmus
 * † Scenedesmus bijuga – or unidentified related form
 * † Schinopsis – tentative report
 * † Schinopsis dubia
 * † Schizaeoisporites
 * † Schizaeoisporites sp.
 * † Schizosporis
 * † Schizosporis sp.informal
 * † Schlotheimia
 * † Schlotheimia sp.
 * † Schlotheimia stenorhyncha – or unidentified comparable form
 * † Schrankipollis
 * † Schrankipollis kachaikensis – or unidentified comparable form
 * † Schrankipollis kachaikensis
 * † Schrankipollis sp.informal
 * † Scleropteris
 * † Scleropteris furcata
 * † Scleropteris sp. 1informal
 * † Scleropteris sp. 2informal
 * † Scoyenia
 * † Scoyenia sp.
 * † Scriniodinium
 * † Scriniodinium sp.
 * † Scurriopsis – tentative report
 * † Scurriopsis sp.
 * † Secernosaurus – type locality for genus
 * † Secernosaurus
 * † Secernosaurus koerneri – type locality for species
 * † Secernosaurus koerneri
 * † Semionotus
 * † Semionotus mendozaensis – type locality for species
 * † Semionotus unicristatus
 * † Semionotus vallejensis – type locality for species
 * † Senipites
 * † Senipites sp.
 * † Senipites tercrassata
 * † Septifer
 * † Septifer mayai – type locality for species
 * † Septocardia – tentative report
 * † Septocardia
 * † Septocardia peruviana – tentative report
 * † Septocardia peruviana – or unidentified comparable form
 * † Septocardia sp.
 * † Serpula
 * † Serpula sp.
 * † Sestrosporites
 * † Sestrosporites pseudoalveolatus
 * † Shimmelia – type locality for genus
 * † Shimmelia chirotheroides – type locality for species
 * † Sillosuchus – type locality for genus
 * † Sillosuchus longicervix – type locality for species
 * † Singhia
 * † Singhia montanaensis
 * † Singhia multicostata
 * † Singhia sp.informal
 * † Singhia sp.
 * † Sinuarbullina – tentative report
 * † Sinuarbullina
 * † Sinuarbullina melehuensis – type locality for species
 * † Sinuarbullina melehuensis
 * † Sinzovia
 * † Sinzovia leanzai
 * † Sinzovia piatnitzkyi
 * † Skorpiovenator – type locality for genus
 * † Skorpiovenator bustingorryi – type locality for species
 * † Solemya – tentative report
 * † Solemya sp.
 * † Solyma
 * † Solyma levis – or unidentified comparable form
 * † Solyma levis
 * † Sonninia
 * † Sonninia espinazitensi
 * † Sonninia espinazitensis
 * † Soroavisaurus – type locality for genus
 * † Soroavisaurus australis – type locality for species
 * † Sotasporites
 * † Sotasporites elegans
 * † Sotasporites sp. Ainformal
 * † Sousaichnium
 * † Sousaichnium monettae – type locality for species
 * † Sparganiaceaepollenites
 * † Sparganiaceaepollenites barungensis
 * † Sparganiaceaepollenites sp.
 * † Sphaerovum – or unidentified comparable form
 * † Sphaerovum
 * † Sphaerovum erbeni
 * † Sphenobaiera
 * † Sphenobaiera sp. 1informal
 * † Sphenobaiera sp. 2informal
 * † Sphenocondor – type locality for genus
 * † Sphenocondor gracilis – type locality for species
 * † Sphenopteris – or unidentified comparable form
 * † Sphenopteris
 * † Sphenopteris goepperti
 * † Sphenopteris naktongensis – or unidentified comparable form
 * † Sphenopteris patagonica
 * † Sphenopteris psilotoides
 * † Sphenopteris sp.
 * † Sphenopteris sp. 1informal
 * † Sphenopteris sp. 2informal
 * † Sphenopteris sp. 3informal
 * † Sphenotitan – type locality for genus
 * † Sphenotitan
 * † Sphenotitan leyesi – type locality for species
 * † Sphenotitan leyesi
 * † Spiniferites
 * † Spiniferites ramosus
 * † Spiniferites spp.
 * † Spinitricolpites
 * † Spinitricolpites sp.
 * † Spinizonocolpites
 * † Spinizonocolpites hialinus
 * † Spinizonocolpites sp.informal
 * † Spinizonocolpites sp.
 * † Spinizonocolpites sp. 1informal
 * † Spiriferina
 * † Spiriferina sp.
 * † Spiriferina tumida
 * † Spiropteris
 * † Spiropteris sp.
 * † Spiropteris sp. 1informal
 * † Spiticeras
 * † Spiticeras hauthali
 * † Spitidiscus
 * † Spitidiscus kilapiae
 * † Spitidiscus riccardii
 * † Spitidiscus sp.
 * † Spondylus
 * † Spondylus sp.
 * † Spongodinium
 * † Spongodinium reticulatum
 * † Spongodinium sp.
 * † Staplinisporites
 * † Staplinisporites caminus
 * † Stauroderma – or unidentified comparable form
 * † Stauroderma sp.
 * † Steevesipollenites
 * † Steevesipollenites sp.informal
 * † Stehnocephalites
 * † Stehnocephalites crassicostatus
 * † Stehnocephalites gerthi
 * † Steinmanella
 * † Steinmanella erycina
 * † Steinmanella pehuenmapuensis
 * † Steinmanella quintucoensis
 * † Steinmanella raimondii
 * † Steinmanella sp.
 * † Steinmanella transitoria – or unidentified comparable form
 * † Steinmanella transitoria
 * † Steinmanella vacaensis
 * † Stelidioseris
 * † Stelidioseris sp.
 * † Steneosaurus
 * † Steneosaurus gerthi
 * † Stenopterygius
 * † Stenopterygius grandis – type locality for species
 * † Stephanastrea
 * † Stephanastrea ramulifera
 * † Stephanastrea sp.
 * † Stephanocolpites
 * † Stephanocolpites mastandreai
 * † Sterculia
 * † Sterculia patagonica
 * † Sterculia platanoides
 * † Stereisporites
 * † Stereisporites antiquasporites – or unidentified comparable form
 * † Stereisporites antiquasporites
 * † Stereisporites maastrichtiensis
 * † Stereisporites sp.
 * † Stereisporites sp. Ainformal
 * † Stereocaenia
 * † Stereocaenia triboleti
 * † Steueroceras
 * † Steueroceras ellipsostomum
 * † Steueroceras incertum
 * † Steueroceras koeneni
 * † Steueroceras rotumdatus
 * † Steueroceras subfasciatum – tentative report
 * † Stipanicichnus – type locality for genus
 * † Stipanicichnus bonetti – type locality for species
 * † Stolleyiceras
 * † Stolleyiceras desmoceratoides
 * † Stoverisporites
 * † Stoverisporites lunaris
 * † Striatoconulus
 * † Striatoconulus sp.
 * † Striatricolporites
 * † Striatricolporites gamerroi
 * † Striatricolporites sp.
 * † Striatriletes
 * † Striatriletes areolatus – type locality for species
 * † Striatriletes areolatus
 * † Striatriletes reticulatus
 * † Striatriletes sulcatus
 * † Struthioptera
 * † Struthioptera haastiana – or unidentified comparable form
 * † Stylophyllopsis – tentative report
 * † Stylophyllopsis victoriae – or unidentified comparable form
 * † Substeueroceras
 * † Substeueroceras sp.
 * † Substeueroceras striolatissimum – or unidentified comparable form
 * † Subvinalesphinctes – tentative report
 * † Subvinalesphinctes
 * † Subvinalesphinctes prophetae
 * † Subvinalesphinctes pseudokranaus – type locality for species
 * † Subvinalesphinctes pseudokranaus
 * † Subvinalesphinctes sp. Ainformal
 * † Sueria – type locality for genus
 * † Sueria rectinervis – type locality for species
 * † Sulcusuchus – type locality for genus
 * † Sulcusuchus
 * † Sulcusuchus erraini – type locality for species
 * † Sulcusuchus erraini
 * † Sutneria
 * † Sutneria sp. Ainformal
 * † Syncolporites – tentative report
 * † Syncolporites sp.informal
 * † Systematophora
 * † Systematophora sp.
 * † Taenidium
 * † Taenidium sp.
 * † Taeniopteris
 * † Taeniopteris sp. 1informal
 * † Taeniopteris sp. 2informal
 * † Talenkauen – type locality for genus
 * † Talenkauen santacrucensis – type locality for species
 * † Tanyosphaeridium
 * † Tanyosphaeridium isocalamum – or unidentified comparable form
 * † Tanyosphaeridium magneticum
 * † Tanyosphaeridium salpinx
 * † Tanyosphaeridium xanthiopyxides
 * † Taponichnus – type locality for genus
 * † Taponichnus donottoi – type locality for species
 * † Taramelliceras – tentative report
 * † Taramelliceras sp.
 * † Tarjadia – type locality for genus
 * † Tarjadia
 * † Tarjadia ruthae – type locality for species
 * † Tarjadia ruthae
 * † Taurocusporites
 * † Taurocusporites segmentatus
 * † Taurocusporites sp.informal
 * † Taurocusporites sp. 2informal
 * † Tauromeniceras
 * † Tauromeniceras sp.informal
 * † Taurovenator – type locality for genus
 * † Taurovenator violantei – type locality for species
 * † Taxites
 * † Taxites sp. 1informal
 * † Tectatodinium
 * † Tectatodinium rugulatum
 * † Tehamadinium
 * † Tehamadinium sousensis – or unidentified comparable form
 * † Tehamadinium sp.
 * † Tehuelchesaurus – type locality for genus
 * † Tehuelchesaurus benitezii – type locality for species
 * † Telemachus
 * † Telemachus sp. 1informal
 * † Telemachus sp. 2informal
 * † Telosichnus – type locality for genus
 * † Telosichnus saltensis – type locality for species
 * † Tenellisporites
 * † Tenellisporites coronatus – type locality for species
 * † Tenellisporites coronatus
 * † Terquemia – tentative report
 * † Terquemia andina – type locality for species
 * † Terquemia andina
 * † Tethyoceramus
 * † Tethyoceramus madagascariensis
 * † Tetragonites
 * † Tetragonites heterosulcatus
 * † Tetrasauropus
 * † Tetrasauropus sp.
 * † Thalassinoides
 * † Thalassinoides sp.
 * † Thamnasteria
 * † Thamnasteria sp.
 * † Thaumatopteris
 * † Thaumatopteris sp. 1informal
 * † Thecosmilia
 * † Thecosmilia sp.
 * † Therangospodus – or unidentified comparable form
 * † Therangospodus pandemicus
 * † Thorhallenia – type locality for genus
 * † Thorhallenia
 * † Thorhallenia dentata – type locality for species
 * † Thorhallenia form Ainformal
 * † Thorhallenia form Binformal
 * † Thorphyllum – type locality for genus
 * † Thorphyllum patagonica – type locality for species
 * † Thracia
 * † Thracia lenticularis
 * † Thracia sp.
 * † Thurmania
 * † Thurmania fraudans
 * † Thurmanniceras
 * † Thurmanniceras sp.
 * † Tipulidites – type locality for genus
 * † Tipulidites affinis – type locality for species
 * † Tipuloidea – type locality for genus
 * † Tipuloidea rhaetica – type locality for species
 * † Titanopodus – type locality for genus
 * † Titanopodus mendozensis – type locality for species
 * † Titanosaurus – tentative report
 * † Titanosaurus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Titanosaurus
 * † Titanosaurus nanus – type locality for species
 * † Titanosaurus sp.
 * † Todisporites
 * † Todisporites major
 * † Todisporites minor
 * † Todisporites sp.
 * † Todisporites sp. Ainformal
 * † Todites
 * † Todites sp. 1informal
 * † Tomaxellia
 * † Tomaxellia sp. 1informal
 * † Tonohamites
 * † Tonohamites aequicingulatus
 * † Torpidoceras
 * † Torpidoceras sp.
 * † Torquatisphinctes
 * † Torquatisphinctes mendozanus – or unidentified comparable form
 * † Torquatisphinctes proximus
 * † Toxoceratoides – tentative report
 * † Toxoceratoides
 * † Toxoceratoides biplex – or unidentified comparable form
 * † Toxoceratoides haughtoni
 * † Toxoceratoides nagerai
 * † Toxoceratoides sp.
 * † Trachyleberis
 * † Trachyleberis princeps
 * † Trapalcochelys – type locality for genus
 * † Trapalcochelys sulcata – type locality for species
 * † Trapalcotherium – type locality for genus
 * † Trapalcotherium matuastensis – type locality for species
 * † Traukutitan – type locality for genus
 * † Traukutitan eocaudata – type locality for species
 * † Treptichnus
 * † Treptichnus pollardi
 * † Trialestes – type locality for genus
 * † Trialestes
 * † Trialestes romeri – type locality for species
 * † Trialestes romeri
 * † Triasseuryptilon
 * † Triasseuryptilon acostai – type locality for species
 * † Triassoblatta – tentative report
 * † Triassoblatta
 * † Triassoblatta argentina – type locality for species
 * † Triassoblatta sp.
 * † Triassothemis – type locality for genus
 * † Triassothemis mendozensis – type locality for species
 * † Triatriopollenites
 * † Triatriopollenites bertelsii
 * † Triatriopollenites lateflexus – or unidentified comparable form
 * † Triatriopollenites lateflexus
 * † Triatriopollenites sp.
 * † Triatriopollenites sp. 1informal
 * † Trichites – tentative report
 * † Trichites sp.
 * † Trichotomosulcites
 * † Trichotomosulcites microsaccatus
 * † Tricolpate
 * † Tricolpate sp.informal
 * † Tricolpites
 * † Tricolpites bibaculatus
 * † Tricolpites reticulatus – or unidentified comparable form
 * † Tricolpites reticulatus
 * † Tricolpites sagax – or unidentified comparable form
 * † Tricolpites sp.informal
 * † Tricolpites sp.
 * † Tricolpites sp. 1informal
 * † Tricolpites sp. 2informal
 * † Tricolpites variabilis – or unidentified comparable form
 * † Tricolporites
 * † Tricolporites sp. 1informal
 * † Tricolporoidites
 * † Tricolporoidites sp.informal
 * † Tricolporoidites sp.
 * † Tricotomosulcado
 * † Tricotomosulcado sp.informal
 * † Tridigitichnus – type locality for genus
 * † Tridigitichnus inopinatus – type locality for species
 * † Trigonia
 * † Trigonia aliexpandita
 * † Trigonia carinata
 * † Trigonia mirandaensis
 * † Trigonia sp.
 * † Trigonia weidmanni
 * † Trihennigma – type locality for genus
 * † Trihennigma zavattierii – type locality for species
 * † Trileites
 * † Trileites murrayi – or unidentified comparable form
 * † Trileites spp.
 * † Trilites
 * † Trilites sp.informal
 * † Trilites sp. 1informal
 * † Trilites volkheimerii
 * † Trillus
 * † Trillus elkhornensis
 * † Trilobosporites
 * † Trilobosporites purverulentus
 * † Trilobosporites trioreticulosus
 * † Trimarginites
 * † Trimarginites eucaris – or unidentified comparable form
 * † Trimarginites eucharis – or unidentified comparable form
 * † Triporoletes
 * † Triporoletes asper
 * † Triporoletes reticulatus
 * † Triporopollenites
 * † Triporopollenites ambiguus – or unidentified comparable form
 * † Triporopollenites minor
 * † Triporopollenites sp.
 * † Trisaccites
 * † Trisaccites microsaccatum
 * † Trisaccites microsaccatus
 * † Tropaeum – tentative report
 * † Tropaeum
 * † Tropaeum inflatum
 * † Tropaeum sp.
 * † Tropidoceras – tentative report
 * † Tropidoceras
 * † Tropidoceras atuelense – type locality for species
 * † Tropidoceras atuelense
 * † Tropidoceras demonense – or unidentified related form
 * † Tropidoceras demonense – or unidentified comparable form
 * † Tropidoceras flandrini – or unidentified comparable form
 * † Tropidoceras flandrini
 * † Tropidoceras hamulatum – type locality for species
 * † Tropidoceras hamulatum
 * † Tropidoceras mediterraneum – or unidentified comparable form
 * † Tropidoceras sp.
 * † Tropidoceras zitteliex gr.
 * † Tropidoceras zitteli – or unidentified comparable form
 * † Tropidosuchus – type locality for genus
 * † Tropidosuchus
 * † Tropidosuchus romeri – type locality for species
 * † Tropidosuchus romeri
 * † Tuarangisaurus
 * † Tuarangisaurus cabazai – type locality for species
 * † Tuberculatosporites
 * † Tuberculatosporites parvus
 * † Tuberculatosporites sp. Ainformal
 * † Tuberosciponoceras – type locality for genus
 * † Tuberosciponoceras
 * † Tuberosciponoceras insolitum – type locality for species
 * † Tuberosciponoceras insolitum
 * † Tubulifloridites
 * † Tubulifloridites lilliei
 * † Turritella
 * † Turritella lineolata – or unidentified related form
 * † Turritella malaspina
 * † Tutcheria
 * † Tutcheria densestriata – or unidentified related form
 * † Tylostoma
 * † Tylostoma jaworskii
 * † Typothorax
 * † Typothorax punctulatus – type locality for species
 * † Tyrannotitan – type locality for genus
 * † Tyrannotitan – or unidentified comparable form
 * † Tyrannotitan
 * † Tyrannotitan chubutensis – type locality for species
 * † Tyrannotitan chubutensis
 * † Tyrannotitan sp.
 * † Uhligella – tentative report
 * † Uhligella sp. ainformal
 * † Umsinenoceras
 * † Umsinenoceras cardielense – type locality for species
 * † Unenlagia – type locality for genus
 * † Unenlagia
 * † Unenlagia comahuensis – type locality for species
 * † Unenlagia paynemili – type locality for species
 * † Unquillosaurus – type locality for genus
 * † Unquillosaurus ceibalii – type locality for species
 * † Uptonia
 * † Uptonia sp.
 * † Vallizonosporites
 * † Vallizonosporites spinosus
 * † Vaugonia
 * † Vaugonia sp.
 * † Velocisaurus – type locality for genus
 * † Velocisaurus
 * † Velocisaurus unicus – type locality for species
 * † Velocisaurus unicus
 * † Venaticosuchus – type locality for genus
 * † Venaticosuchus rusconii – type locality for species
 * † Venericardia
 * † Venericardia burmeisteri
 * † Venericardia iheringi
 * † Venericardia sp.
 * † Veniella
 * † Veniella pampaensis
 * † Veranadaites
 * † Veranadaites palmicostatus – type locality for species
 * † Veranadaites palmicostatus
 * † Vermiceras
 * † Vermiceras coregonense – or unidentified comparable form
 * † Vermiceras gracile – or unidentified comparable form
 * † Vermiceras rursicostatum – or unidentified comparable form
 * † Vermiceras sp.
 * † Vermiceras spp.
 * † Verrucosisporites
 * † Verrucosisporites sp.
 * † Verrucosisporites sp. 1informal
 * † Verrucosisporites sp. Ainformal
 * † Verrucosisporites sp. Einformal
 * † Verrucosisporites varians – or unidentified comparable form
 * † Verrutricolpites
 * † Verrutricolpites sp.informal
 * † Verrutricolpites sp.
 * † Verrutriletes
 * † Verrutriletes tomtaylori
 * † Viavenator – type locality for genus
 * † Viavenator exxoni – type locality for species
 * † Vinalesphinctes
 * † Vinalesphinctes – type locality for species Ainformal
 * † Vincelestes – type locality for genus
 * † Vincelestes neuquenianus – type locality for species
 * † Vinceria – type locality for genus
 * † Vinceria
 * † Vinceria andina – type locality for species
 * † Vinceria argentinensis – type locality for species
 * † Vinceria vieja – type locality for species
 * † Vinceria vieja
 * † Vitreisporites
 * † Vitreisporites pallidus
 * † Volanoceras
 * † Volanoceras sp.
 * † Volkheimeria – type locality for genus
 * † Volkheimeria chubutensis – type locality for species
 * † Waehneroceras
 * † Waehneroceras longipontinum – or unidentified comparable form
 * † Walkeripollis
 * † Walkeripollis sp.informal
 * † Walkeripollis sp.
 * † Walkomia
 * † Walkomia sp. 1informal
 * † Waltzispora
 * † Waltzispora sp. Ainformal
 * † Wargosuchus – type locality for genus
 * † Wargosuchus australis – type locality for species
 * † Weavericeras
 * † Weavericeras vacaense
 * † Wenupteryx – type locality for genus
 * † Wenupteryx
 * † Wenupteryx uzi – type locality for species
 * † Wenupteryx uzi
 * † Weyla
 * † Weyla alata
 * † Weyla bodenbenderi
 * † Weyla bondenbenderi
 * † Weyla mexicana – tentative report
 * † Weyla sp.
 * † Weyla unca
 * † Wichmannella
 * † Wichmannella araucana
 * † Wichmannella cretacea – type locality for species
 * † Wildeichnus – type locality for genus
 * † Wildeichnus navesi – type locality for species
 * † Williamsonia
 * † Williamsonia sp. 1informal
 * † Willinakaqe – type locality for genus
 * † Willinakaqe salitralensis – type locality for species
 * † Windhauseniceras
 * † Windhauseniceras sp.
 * † Worsdellia
 * † Worsdellia bonettiae
 * † Xanthilites – tentative report
 * † Xanthilites gerthi
 * † Xenocephalites
 * † Xenocephalites araucanus – or unidentified comparable form
 * † Xenocephalites gottschei
 * † Xenocephalites neuquensis – or unidentified related form
 * † Xenocephalites neuquensis
 * † Xenocephalites sp.
 * † Xenocephalites sp. Ainformal
 * † Xenocephalites stipanicici
 * † Xenopus – or unidentified comparable form
 * † Xenopus sp.
 * † Xenotarsosaurus – type locality for genus
 * † Xenotarsosaurus bonapartei – type locality for species
 * † Xylopteris
 * † Xylopteris sp. 1informal
 * † Xylopteris sp. 2informal
 * † Yabeiella
 * † Yabeiella sp. 1informal
 * † Yabeiella sp. 2informal
 * † Yabeiella sp. 3informal
 * † Yabeiella sp. 4informal
 * † Yacoraitichnus – type locality for genus
 * † Yacoraitichnus avis – type locality for species
 * † Yaminuechelys – type locality for genus
 * † Yaminuechelys
 * † Yaminuechelys gasparinii – type locality for species
 * † Yaminuechelys gasparinii – or unidentified comparable form
 * † Yaminuechelys gasparinii
 * † Yaminuechelys maior – or unidentified related form
 * † Yungavolucris – type locality for genus
 * † Yungavolucris brevipedalis – type locality for species
 * † Yurigocimex – type locality for genus
 * † Yurigocimex popovi – type locality for species
 * † Zamites
 * † Zamites sp. 1informal
 * † Zapalasaurus – type locality for genus
 * † Zapalasaurus – or unidentified comparable form
 * † Zapalasaurus bonapartei – type locality for species
 * † Zapalasaurus sp.
 * † Zapalia
 * † Zapalia fascipartita
 * † Zapalia sp.
 * † Zetoceras
 * † Zetoceras iudicariense – or unidentified comparable form
 * † Zoophycos
 * † Zoophycos sp.
 * † Zuberia – tentative report
 * † Zuberia
 * † Zuberia barrealensis
 * † Zuberia feistmanteli
 * † Zuberia sahnii
 * † Zuberia sp. 1informal
 * † Zuberia sp. 2informal
 * † Zuberia zuberi – or unidentified comparable form
 * † Zuberia zuberi
 * † Zugmayerella – tentative report
 * † Zugmayerella koerneri – or unidentified comparable form
 * † Zupaysaurus – type locality for genus
 * † Zupaysaurus rougieri – type locality for species
 * † Zygadenia
 * † Zygadenia sp. 1informal

Cenozoic

 * † Abderites
 * † Abderites meridionalis
 * † Abderites sp.
 * † Abertella
 * † Abertella gualichensis – type locality for species
 * † Abertella gualichensis
 * † Abertella sp.
 * † Abrocoma
 * † Abrocoma antiqua – or unidentified comparable form
 * † Abrocoma sp.
 * † Abrothrix
 * † Abrothrix illuteus
 * † Abrothrix magnus
 * † Acaciapollenites
 * † Acaciapollenites acaciae – type locality for species
 * † Acaciapollenites myriosporites
 * † Acacioxylon
 * † Acacioxylon odonellii – type locality for species
 * † Acaena
 * † Acaena brandmayri
 * † Acaena sp.
 * † Acaena spp.
 * † Acamana – type locality for genus
 * † Acamana ambiguus – type locality for species
 * † Acantharodeia
 * † Acantharodeia sp.
 * † Acanthina
 * † Acanthina imbricata
 * † Acanthina monodon
 * † Acanthocephalonotum – type locality for genus
 * † Acanthocephalonotum martinsnetoi – type locality for species
 * † Acarechimys
 * † Acarechimys leucotheae – type locality for species
 * † Acarechimys minutissimus – or unidentified comparable form
 * † Acarechimys minutissimus
 * † Acarechimys sp.
 * † Acaremys
 * † Acaremys major – type locality for species
 * † Acaremys messor – type locality for species
 * † Acaremys murinus – type locality for species
 * † Acaremys murinus – or unidentified comparable form
 * † Acaremys murinus
 * † Acaremys preminutus – type locality for species
 * † Acaremys sp.
 * † Acaremys tricarinatus – type locality for species
 * † Acaremys tricarinatus
 * † Acdestis
 * † Acdestis lemairei
 * † Acdestis oweni
 * † Acesta
 * † Acesta excavata
 * † Acesta latens – or unidentified comparable form
 * † Acesta snowhillensis
 * † Acesta sp.
 * † Achradosporis
 * † Achradosporis lurensis – type locality for species
 * † Achradosporis lurensis
 * † Achradosporis sp.
 * † Acirsa – or unidentified related form
 * † Acirsa parvicostata
 * † Acmopyle
 * † Acmopyle engelhardti
 * † Acoelodus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Acoelodus
 * † Acoelodus debilitatus – type locality for species
 * † Acoelodus oppositus – type locality for species
 * † Acoelodus proclivus – type locality for species
 * † Acoelodus terminalis – type locality for species
 * † Acoelohyrax – type locality for genus
 * † Acoelohyrax
 * † Acoelohyrax coalitus – type locality for species
 * † Acoelohyrax coarctatus – type locality for species
 * † Acoelohyrax complicatissimus – type locality for species
 * † Acoelohyrax coronatus – type locality for species
 * † Acoelohyrax sigma – type locality for species
 * † Acrocyon – or unidentified comparable form
 * † Acrocyon
 * † Acrocyon riggsi – type locality for species
 * † Acrocyon riggsi
 * † Acrocyon sectorius
 * † Acrodiclidium
 * † Acrodiclidium oligocaenicum
 * † Acropithecus
 * † Acropithecus rigidus – type locality for species
 * † Acropithecus rigidus – tentative report
 * † Acropithecus rigidus
 * † Actaeon
 * † Actaeon argentinus
 * † Actenomys
 * † Actenomys latidens
 * † Actenomys priscus
 * † Actenomys sp.
 * † Acteocina
 * † Acteocina piramidesia
 * † Acteon – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Acteon
 * † Acteon bajoensis
 * † Acteon chilensis
 * † Acteon semilaevis
 * † Acyon – type locality for genus
 * † Acyon
 * † Acyon tricuspidatus – type locality for species
 * † Acyon tricuspidatus
 * † Adelomedon
 * † Adelomedon brasiliensis
 * † Adelomedon sp.
 * † Adelomelon
 * † Adelomelon alta
 * † Adelomelon ancilla
 * † Adelomelon beckii
 * † Adelomelon burmeisteri
 * † Adelomelon cannada
 * † Adelomelon ferussacii
 * † Adelomelon posei
 * † Adelphomys
 * † Adelphomys candidus
 * † Adenocalymma
 * † Adenocalymma tertiaria – type locality for species
 * † Adianthus – type locality for genus
 * † Adianthus bucatus – type locality for species
 * † Adiantoides – type locality for genus
 * † Adiantoides
 * † Adiantoides leali – type locality for species
 * † Adiantoides magnus – type locality for species
 * † Adiantum
 * † Adiantum patagonicum – type locality for species
 * † Adiastaltus – type locality for genus
 * † Adiastaltus
 * † Adiastaltus habilis – type locality for species
 * † Adiastaltus habilis
 * † Adiastaltus procerus – type locality for species
 * † Adinotherium – tentative report
 * † Adinotherium
 * † Adinotherium ferum – type locality for species
 * † Adinotherium ferum
 * † Adinotherium ovinum
 * † Adinotherium paranense
 * † Adinotherium robustum
 * † Adinotherium sp.
 * † Admete
 * † Admete ameghinoi
 * † Aeneator
 * † Aeneator annae
 * † Aenigmys – type locality for genus
 * † Aenigmys diamantensis – type locality for species
 * † Aequipecten
 * † Aequipecten insuetus – type locality for species
 * † Aequipecten paraensis
 * † Aequipecten paranensis
 * † Aequipecten tehuelchus
 * † Aequitriradites
 * † Aequitriradites spinulosus
 * † Agathis
 * † Agathis zamunerae
 * † Agathistoma
 * † Agathistoma patagonicum
 * † Agathoxylon
 * † Agathoxylon sp.
 * † Aglaocetus
 * † Aglaocetus moreni – type locality for species
 * † Aglaocetus moreni
 * † Ailanthipites
 * † Ailanthipites sp.
 * † Ailanthipites sp. Ainformal
 * † Akania
 * † Akania patagonica
 * † Akania sp.
 * † Akodon
 * † Akodon azarae – or unidentified comparable form
 * † Akodon azarae
 * † Akodon iniscatus – or unidentified comparable form
 * † Akodon sp.
 * † Alaripeda – or unidentified comparable form
 * † Alaripeda sp.
 * † Albertipollenites
 * † Albertipollenites anguloluminosus
 * † Albertogaudrya – type locality for genus
 * † Albertogaudrya – tentative report
 * † Albertogaudrya
 * † Albertogaudrya carahuasensis
 * † Albertogaudrya sp.
 * † Albertogaudrya unica – type locality for species
 * † Albertogaudrya unica
 * † Allalmeia – type locality for genus
 * † Allalmeia atalaensis – type locality for species
 * † Allamanda
 * † Allamanda crassostipitata
 * † Allognathosuchus – or unidentified related form
 * † Allognathosuchus sp.
 * † Alloiomys
 * † Alloiomys sp.
 * † Allophyllus
 * † Allophyllus eduliformis – tentative report
 * † Allophyllus eduliformis
 * † Allophyllus graciliformis
 * † Allophylus – or unidentified comparable form
 * † Allophylus eduliformis
 * † Alnipollenites
 * † Alnipollenites verus
 * † Alsophila
 * † Alsophila antarctica
 * † Alsophilocaulis
 * † Alsophilocaulis calveloi – type locality for species
 * † Alsophilocaulis calveloi
 * † Ameghinomya
 * † Ameghinomya antiqua
 * † Ameghinomya meridonalis
 * † Amilnedwardsia
 * † Amilnedwardsia brevicula – type locality for species
 * † Ampelodaphne
 * † Ampelodaphne grandifolia
 * † Amphidolops – type locality for genus
 * † Amphidolops
 * † Amphidolops serrula – type locality for species
 * † Amphidolops serrula
 * † Amphidolops sp. nov. 1informal
 * † Amphidolops sp. nov. 2informal
 * † Amphidolops yapa – type locality for species
 * † Amphiocnus
 * † Amphiocnus paranense
 * † Amplaster
 * † Amplaster sp.
 * † Ampullina
 * † Ampullina australis
 * † Ampullina dubia
 * † Amusium
 * † Amusium darwinianum
 * † Amusium paris – type locality for species
 * † Amusium paris
 * † Amusium rorii
 * † Anacardites – tentative report
 * † Anacardites
 * † Anacardites brittoni – type locality for species
 * † Anacardites patagonicus – type locality for species
 * † Anacardites pichileufensis – type locality for species
 * † Anacolosidites
 * † Anacolosidites diffusa – type locality for species
 * † Anacolosidites diffusa
 * † Anadara
 * † Anadara australis
 * † Anadara bonplandiana
 * † Anadara bravardi
 * † Anadara lirata
 * † Anadara panensis
 * † Anagonia – type locality for genus
 * † Anagonia insulata – type locality for species
 * † Anantiosodon
 * † Anantiosodon rarus
 * † Anargyrolagus – type locality for genus
 * † Anargyrolagus primus – type locality for species
 * † Anas – or unidentified comparable form
 * † Anas
 * † Anas platalea – or unidentified comparable form
 * † Anas sp.
 * † Anathitus – type locality for genus
 * † Anathitus revelator – type locality for species
 * † Anatochoerus
 * † Anatochoerus sp.
 * † Anatolinites
 * † Anatolinites spp.
 * † Ancylocoelus
 * † Ancylocoelus frequens – type locality for species
 * † Ancylocoelus frequens
 * † Ancylocoelus minor – type locality for species
 * † Andalgalornis
 * † Andalgalornis sp.
 * † Andinomys
 * † Andinomys edax
 * † Andrewsornis – or unidentified comparable form
 * † Andrewsornis sp.
 * † Angelocabrerus – type locality for genus
 * † Angelocabrerus daptes – type locality for species
 * † Anisolambda
 * † Anisolambda amel – type locality for species
 * † Anisolambda amel
 * † Anisolambda fissidens – type locality for species
 * † Anisolambda fissidens
 * † Anisolambda nodulosa – type locality for species
 * † Anisolambda sp.
 * † Anisolornis
 * † Anisolornis excavatus
 * † Anisorhizus – type locality for genus
 * † Anisorhizus atriarius – type locality for species
 * † Anisotemnus
 * † Anisotemnus distentus – type locality for species
 * † Anisotemnus distentus
 * † Annulispora
 * † Annulispora folliculosa
 * † Anomalocardia
 * † Anomalocardia enterriana
 * † Anomalocardia entrerriana
 * † Anomia
 * † Anomia pileata
 * † Anomia sp.
 * † Anona
 * † Anona infestans – type locality for species
 * † Antalis
 * † Antalis dodecacostatum
 * † Antalis flechensis
 * † Antarctodarwinella
 * † Antarctodarwinella iheringi
 * † Antepithecus
 * † Antepithecus brachystephanus – type locality for species
 * † Antepithecus brachystephanus – tentative report
 * † Antepithecus brachystephanus
 * † Antepithecus innexus – type locality for species
 * † Antepithecus sp.
 * † Anthicus
 * † Anthicus sepultulus – type locality for species
 * † Anthocerisporis
 * † Anthocerisporis gandolfii
 * † Anthoceros
 * † Anthoceros spp.
 * † Anthocerotofitas
 * † Anthocerotofitas sp.
 * † Anthonomus – tentative report
 * † Anthonomus sunchalensis
 * † Antifer
 * † Antifer crassus – type locality for species
 * † Antimelatoma
 * † Antimelatoma cuevensis
 * † Antimelatoma quemadensis
 * † Antofagastia – type locality for genus
 * † Antofagastia – or unidentified comparable form
 * † Antofagastia sp.
 * † Antofagastia turneri – type locality for species
 * † Antulsporites
 * † Antulsporites clavus
 * † Aphrodina
 * † Aphrodina burckhardti
 * † Aphrodina wilckensi
 * † Apiculatisporites
 * † Apiculatisporites charahuillaensis – or unidentified comparable form
 * † Apocynophyllum
 * † Apocynophyllum chalianum – type locality for species
 * † Apterodytes
 * † Apterodytes ictus
 * † Araloselachus
 * † Araloselachus cuspidata
 * † Araucaria
 * † Araucaria marensii
 * † Araucaria nathorsti
 * † Araucaria pichileufensis – type locality for species
 * † Araucaria pichileufensis
 * † Araucaria sp.
 * † Araucaria TY0013informal
 * † Araucaria TY013informal
 * † Araucaria TY014informal
 * † Araucariacites
 * † Araucariacites australis
 * † Araucariacites sp.
 * † Arca
 * † Arca obliqua
 * † Arca particularis – type locality for species
 * † Arca patagonica
 * † Arca puntaensis
 * † Arca sp.
 * † Arca strangulata
 * † Archaeohyracotherium
 * † Archaeohyracotherium mediale – type locality for species
 * † Archaeohyrax – type locality for genus
 * † Archaeohyrax – tentative report
 * † Archaeohyrax
 * † Archaeohyrax patagonicus – type locality for species
 * † Archaeohyrax patagonicus
 * † Archaeohyrax sp.
 * † Archaeohyrax suniensis
 * † Archaeophylus – type locality for genus
 * † Archaeophylus
 * † Archaeophylus patrius – type locality for species
 * † Archaeophylus patrius
 * † Archaeopithecus – type locality for genus
 * † Archaeopithecus
 * † Archaeopithecus fossulatus – type locality for species
 * † Archaeopithecus rogeri – type locality for species
 * † Archaeopithecus rogeri – or unidentified comparable form
 * † Archaeoplus – type locality for genus
 * † Archaeoplus incipiens – type locality for species
 * † Archaeorycteropus
 * † Archaeorycteropus patagonicus – type locality for species
 * † Archaeotypotherium – or unidentified comparable form
 * † Archaeotypotherium
 * † Archaeotypotherium propheticus
 * † Archaeotypotherium sp.
 * † Archaeutatus
 * † Archaeutatus malaspinensis – or unidentified related form
 * † Archaeutatus malaspinensis
 * † Archaeutatus sp.
 * † Archaeutatus sp. nov.informal
 * † Archimyrmex – type locality for genus
 * † Archimyrmex piatnitzkyi – type locality for species
 * † Archimyrmex smekali – type locality for species
 * † Arcomytilus
 * † Arcomytilus primigenius – or unidentified comparable form
 * † Arctocephalus
 * † Arctocephalus sp.
 * † Arctodictis – type locality for genus
 * † Arctodictis – or unidentified comparable form
 * † Arctodictis
 * † Arctodictis munizi – type locality for species
 * † Arctodictis munizi
 * † Arctodictis sinclairi
 * † Arctodictis sp.
 * † Arctotherium
 * † Arctotherium sp.
 * † Ardisia
 * † Ardisia crassifolia
 * † Arecipites
 * † Arecipites asymmetricus
 * † Arecipites minutiscabratus – or unidentified comparable form
 * † Arecipites minutiscabratus
 * † Arecipites sp.
 * † Arecipites subverrucatus
 * † Argentavis – type locality for genus
 * † Argentavis
 * † Argentavis magnificens – type locality for species
 * † Argentavis magnificens
 * † Argopecten
 * † Argopecten gratus – type locality for species
 * † Argopecten insuetus – type locality for species
 * † Argopecten insuetus
 * † Argyrocetus – type locality for genus
 * † Argyrocetus patagonicus – type locality for species
 * † Argyrohippus
 * † Argyrohippus boulei – or unidentified comparable form
 * † Argyrohyrax – type locality for genus
 * † Argyrohyrax
 * † Argyrohyrax proavus – type locality for species
 * † Argyrohyrax proavus
 * † Argyrohyrax sp.
 * † Argyrolagus
 * † Argyrolagus palmeri
 * † Argyrolambda – type locality for genus
 * † Argyrolambda conidens – type locality for species
 * † Argyrolestes – type locality for genus
 * † Argyrolestes peralestinus – type locality for species
 * † Argyromanis – type locality for genus
 * † Argyromanis patagonicus – type locality for species
 * † Arminiheringia – type locality for genus
 * † Arminiheringia
 * † Arminiheringia auceta – type locality for species
 * † Arminiheringia auceta – tentative report
 * † Arminiheringia sp.
 * † Arrabidaea
 * † Arrabidaea patagonica – type locality for species
 * † Arrhoges
 * † Arrhoges gregaria
 * † Arthrodytes
 * † Arthrodytes andrewsi
 * † Arthrodytes sp.
 * † Asmithwoodwardia – type locality for genus
 * † Asmithwoodwardia
 * † Asmithwoodwardia sp.
 * † Asmithwoodwardia sp. nov.informal
 * † Asmithwoodwardia subtrigona – type locality for species
 * † Asmithwoodwardia subtrigona – or unidentified comparable form
 * † Asmithwoodwardia subtrigona
 * † Asmodeus
 * † Asmodeus circumflexus – type locality for species
 * † Asmodeus osborni
 * † Asmodeus petrasnerus – type locality for species
 * † Aspidocalyptus
 * † Aspidocalyptus castroi
 * † Aspidocalyptus sp.
 * † Asplenium
 * † Asplenium incertum – type locality for species
 * † Astarte
 * † Astarte venatorum – or unidentified comparable form
 * † Astarte venatorum
 * † Astegotherium – type locality for genus
 * † Astegotherium – or unidentified comparable form
 * † Astegotherium
 * † Astegotherium dichotomum – type locality for species
 * † Astegotherium sp.
 * † Asteracarpus – type locality for genus
 * † Asteracarpus gomezbelloi – type locality for species
 * † Asterias
 * † Asterias dugratii
 * † Asteromys – type locality for genus
 * † Asteromys – tentative report
 * † Asteromys
 * † Asteromys punctus – type locality for species
 * † Asteromys punctus
 * † Asterostemma – or unidentified comparable form
 * † Asterostemma depressa
 * † Asthenognathus
 * † Asthenognathus microspinus – type locality for species
 * † Asthenognathus sp.
 * † Astraponotus – type locality for genus
 * † Astraponotus
 * † Astraponotus assymmetrus – type locality for species
 * † Astraponotus dicksoni – type locality for species
 * † Astraponotus dilatatus – type locality for species
 * † Astraponotus holdichi – type locality for species
 * † Astraponotus thompsoni – type locality for species
 * † Astrapothericulus
 * † Astrapothericulus sp.
 * † Astrapotherium – tentative report
 * † Astrapotherium – or unidentified comparable form
 * † Astrapotherium
 * † Astrapotherium magnum
 * † Astrapotherium ruderarium – type locality for species
 * † Astrapotherium sp.
 * † Astronium
 * † Astronium argentinum – type locality for species
 * † Astroniumxylon
 * † Astroniumxylon parabalansae – type locality for species
 * † Atalophlebia – tentative report
 * † Atalophlebia sp. Ainformal
 * † Ataxocerithium
 * † Ataxocerithium juliana
 * † Ataxocerithium pardelensis
 * † Ataxocerithium piramidensis
 * † Ataxocerithium trespunta
 * † Atherospermophyllum – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Atherospermophyllum
 * † Atherospermophyllum guinazui
 * † Atrina
 * † Atrina magellanica
 * † Atrina rioturbiensis – type locality for species
 * † Atrina rioturbiensis – or unidentified comparable form
 * † Atrina sp. – tentative report
 * † Atrina sp.
 * † Aturia
 * † Aturia caroliameghinoi
 * † Aulacomya – tentative report
 * † Aulacomya
 * † Aulacomya atra – or unidentified comparable form
 * † Aulacomya atra
 * † Aulacomya sp.
 * † Auliscomys
 * † Auliscomys formosus
 * † Aulophyseter
 * † Aulophyseter rionegrensis – type locality for species
 * † Australohyaena
 * † Australohyaena antiqua – type locality for species
 * † Australohyaena antiqua
 * † Australoneilo – tentative report
 * † Australoneilo
 * † Australoneilo gracilis
 * † Australoneilo sp.
 * † Australoprocta – type locality for genus
 * † Australoprocta
 * † Australoprocta fleaglei – type locality for species
 * † Australoprocta fleaglei
 * † Austrocallista
 * † Austrocallista iheringi
 * † Austrocallista iheringii
 * † Austrocominella
 * † Austrocominella fueguensis
 * † Austrocominella sp.
 * † Austroimbricaria
 * † Austroimbricaria brugnii
 * † Austroimbricaria gracilior
 * † Austroimbricaria gracilor
 * † Austroimbricaria quemadensis
 * † Austrolibellula – type locality for genus
 * † Austrolibellula noroestenia – type locality for species
 * † Austromitra
 * † Austromitra patagonica – tentative report
 * † Austromitra patagonica
 * † Austropanorpodes – type locality for genus
 * † Austropanorpodes gennaken – type locality for species
 * † Austroperilestes – type locality for genus
 * † Austroperilestes hunco – type locality for species
 * † Austrosphaera
 * † Austrosphaera patagonica
 * † Austrotoma
 * † Austrotoma cuevensis
 * † Ayllusuchus – type locality for genus
 * † Ayllusuchus fernandezi – type locality for species
 * † Azara
 * † Azara celastriniforma – type locality for species
 * † Azara celastriniformis
 * † Azara tertiartia
 * † Azolla
 * † Azolla sp.
 * † Azolla TY004informal
 * † Azollopsis
 * † Azollopsis intermedia
 * † Azollopsis tomentosa
 * † Azollopsis tormentosa
 * † Azorella
 * † Azorella spp.
 * † Bachmannia – type locality for genus
 * † Bachmannia chubutensis – type locality for species
 * † Baculatisporites
 * † Baculatisporites comaumensis
 * † Baculatisporites sp.
 * † Baculatisporites turbioensis – type locality for species
 * † Baculatisporites turbioensis
 * † Badiostes
 * † Badiostes patagonicus
 * † Baibiancarpus – type locality for genus
 * † Baibiancarpus chubutensis – type locality for species
 * † Balaena
 * † Balaena dubia
 * † Balaena pampaea – type locality for species
 * † Balaenoptera – or unidentified comparable form
 * † Balaenoptera sp.
 * † Balanus
 * † Balanus foliatus
 * † Balanus psittacus
 * † Balanus sp.sensu lato
 * † Balanus sp.
 * † Balanus subconicus
 * † Balanus varians
 * † Balcis
 * † Balcis flechensis
 * † Banara – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Banara – or unidentified comparable form
 * † Banara
 * † Banara cuadrae
 * † Banara prehernandiensis – type locality for species
 * † Banara prehernandiensis
 * † Banaraphyllum – type locality for genus
 * † Banaraphyllum
 * † Banaraphyllum ovatum – type locality for species
 * † Banaraphyllum ovatum
 * † Banderomys
 * † Banderomys leanzai – type locality for species
 * † Banderomys leanzai
 * † Banisteria
 * † Banisteria patagonica – type locality for species
 * † Barbatia
 * † Barbatia juliana
 * † Barbatia juliania
 * † Barbatia sp.
 * † Bardalestes – type locality for genus
 * † Bardalestes
 * † Bardalestes hunco – type locality for species
 * † Bardalestes sp.
 * † Baricarcinus – type locality for genus
 * † Baricarcinus mariae – type locality for species
 * † Barinasuchus
 * † Barinasuchus sp.
 * † Barnea
 * † Barnea paucispina
 * † Barrancatatus – tentative report
 * † Barrancatatus
 * † Barrancatatus maddeni – type locality for species
 * † Barrancatatus rigidus – type locality for species
 * † Barrancatatus rigidus
 * † Barrancatatus sp.
 * † Bathelia
 * † Bathelia candida
 * † Baumannipollis
 * † Baumannipollis chubutensis
 * † Baumannipollis sp.
 * † Baumannipollis sp. 1informal
 * † Baumannipollis sp. 2informal
 * † Baumannipollis spp.
 * † Baumannipollis variaperturatus
 * † Beaupreaidites – or unidentified comparable form
 * † Beaupreaidites sp.
 * † Bellaspira
 * † Bellaspira sp.
 * † Berardius
 * † Berardius arnuxii
 * † Berberis – or unidentified related form
 * † Berberis
 * † Berberis corymbosifolia – type locality for species
 * † Berberis sp.
 * † Berroia – tentative report
 * † Berroia sp.
 * † Berthawyleria
 * † Berthawyleria sp.
 * † Biantholithus
 * † Biantholithus sparsus
 * † Bicorbula
 * † Bicorbula sp.
 * † Bignonia
 * † Bignonia pichileufuana – type locality for species
 * † Bignonites
 * † Bignonites chalianus – type locality for species
 * † Bignonites ovatus – type locality for species
 * † Biomphalaria
 * † Biomphalaria sp.
 * † Biretisporites
 * † Biretisporites crassilabratus – type locality for species
 * † Biretisporites crassilabratus
 * † Biretisporites potoniaei
 * † Biretisporites sp.
 * † Biretisporites sp. 1informal
 * † Biretisporites sp. Ainformal
 * † Biretisporites sp. Binformal
 * † Biretisporites sp. Iinformal
 * † Biretisporites sp. IIIinformal
 * † Biscutum
 * † Biscutum sp.
 * † Blastocerus
 * † Blastocerus sp.
 * † Blastoconus – type locality for genus
 * † Blastoconus robertsoni – type locality for species
 * † Blechnum
 * † Blechnum sp.
 * † Blechnum turbioense
 * † Boa – tentative report
 * † Boa
 * † Boa constrictor
 * † Boa sp.
 * † Bobbschaefferia
 * † Bobbschaefferia sp.
 * † Bolomys
 * † Bolomys obscurus
 * † Bombacacidites
 * † Bombacacidites isoreticulatus – or unidentified comparable form
 * † Bombacacidites sp. 1informal
 * † Bombax
 * † Bombax sp.
 * † Bonapartherium – type locality for genus
 * † Bonapartherium
 * † Bonapartherium hinakusijum – type locality for species
 * † Bonapartherium serrensis – type locality for species
 * † Boreastylops – type locality for genus
 * † Boreastylops
 * † Boreastylops lumbrerensis – type locality for species
 * † Boreastylops lumbrerensis
 * † Borhyaena
 * † Borhyaena macrodonta – type locality for species
 * † Borhyaena macrodonta
 * † Borhyaena tuberata – type locality for species
 * † Borhyaena tuberata
 * † Borhyaenidium – type locality for genus
 * † Borhyaenidium – or unidentified comparable form
 * † Borhyaenidium
 * † Borhyaenidium musteloides – type locality for species
 * † Borhyaenidium riggsi – type locality for species
 * † Borhyaenidium sp.
 * † Bororoa – type locality for genus
 * † Bororoa
 * † Bororoa andreisii
 * † Bororoa anzulovichii – type locality for species
 * † Borsonia
 * † Borsonia patagonica
 * † Bos
 * † Bos taurus
 * † Bostrycapulus
 * † Bostrycapulus aculeatus
 * † Bothrophoria
 * † Bothrophoria compressa – type locality for species
 * † Botrychium – or unidentified related form
 * † Botrychium sp.
 * † Botryococcus
 * † Botryococcus braunii
 * † Botryococcus sp.
 * † Botryococcus sp. 1informal
 * † Botryococcus sp. 2informal
 * † Botryococcus sp. 3informal
 * † Botryococcus sp. 4informal
 * † Bouchardia
 * † Bouchardia zitteli
 * † Bouchardia zittelli
 * † Brachidontes
 * † Brachidontes ortmanni
 * † Brachidontes purpuratus
 * † Brachidontes rodriguezi
 * † Brachidontes sp.
 * † Brachystephanus – type locality for genus
 * † Brachystephanus postremus – type locality for species
 * † Brachytherium
 * † Brachytherium cuspidatum
 * † Brachytherium laternarium
 * † Bradysia
 * † Bradysia aliciae – type locality for species
 * † Brandmayria
 * † Brandmayria simpsoni
 * † Branisamyopsis
 * † Branisamyopsis australis
 * † Branisamyopsis praesigmoides – type locality for species
 * † Branisamyopsis praesigmoides
 * † Bredeliapollis – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Bredeliapollis sp.
 * † Bretesuchus – type locality for genus
 * † Bretesuchus bonapartei – type locality for species
 * † Briaromys
 * † Briaromys sp.
 * † Bridelioxylon
 * † Bridelioxylon americanum – type locality for species
 * † Brigantedinium
 * † Brigantedinium sp.
 * † Brisaster
 * † Brisaster sp.
 * † Brontornis – type locality for genus
 * † Brontornis
 * † Brontornis burmeisteri – type locality for species
 * † Brontornis burmeisteri
 * † Bryanpattersonia – type locality for genus
 * † Bryanpattersonia
 * † Bryanpattersonia nesodontoides – type locality for species
 * † Bryanpattersonia sulcidens – type locality for species
 * † Bryanpattersonia sulcidens
 * † Buccinulum
 * † Buccinulum agnesia – or unidentified related form
 * † Buettneria
 * † Buettneria asterotrichaformis – tentative report
 * † Buettneria asterotrichiformis – type locality for species
 * † Buettneria lanceolatifolia – type locality for species
 * † Bulbus
 * † Bulbus sp.
 * † Bulimus
 * † Bulimus lutescens
 * † Bulinella
 * † Bulinella juliana
 * † Bulla
 * † Bulla sp.
 * † Bullia
 * † Bullia globulosus
 * † Bullia paytensis
 * † Bullia sp.
 * † Bumelia
 * † Bumelia australis – type locality for species
 * † Caesalpinioxylon
 * † Caesalpinioxylon sp.
 * † Caiman
 * † Caiman australis
 * † Caiman gasparinae – type locality for species
 * † Caiman jacare
 * † Caiman latirostris – or unidentified comparable form
 * † Caiman latirostris
 * † Caiman lutescens – type locality for species
 * † Caiman paranensis – type locality for species
 * † Caiman praecursor – type locality for species
 * † Caiman sp.
 * † Caiman yacare – or unidentified comparable form
 * † Calchaquitherium – type locality for genus
 * † Calchaquitherium mixtum – type locality for species
 * † Callialasporites
 * † Callialasporites trilobatus
 * † Callianassa
 * † Callianassa burckhardi
 * † Callianassa burckhardti
 * † Callianopsis
 * † Callianopsis australis – type locality for species
 * † Callichthys
 * † Callichthys callichthys
 * † Calliostoma
 * † Calliostoma ameghinoi
 * † Calliostoma argentinum
 * † Calliostoma bonorinoi
 * † Calliostoma caminosi
 * † Calliostoma castellanosae
 * † Calliostoma cossmani
 * † Calliostoma duplicatum
 * † Calliostoma garreti
 * † Calliostoma garretti
 * † Calliostoma malumiani
 * † Calliostoma mapuchei
 * † Calliostoma masiuku
 * † Calliostoma meisteri
 * † Calliostoma nativum
 * † Calliostoma negroensis
 * † Calliostoma nudum – or unidentified comparable form
 * † Calliostoma nulloi
 * † Calliostoma observationis
 * † Calliostoma peraratum
 * † Calliostoma planum
 * † Calliostoma punctatulum
 * † Calliostoma puntasium
 * † Calliostoma santacruzense
 * † Calliostoma santacruzensis
 * † Calliostoma sp.
 * † Calliostoma stpanicic
 * † Calliostoma suarezi
 * † Calliostoma trombottoi
 * † Callistoe – type locality for genus
 * † Callistoe
 * † Callistoe sp.
 * † Callistoe vincei – type locality for species
 * † Callistopollenites
 * † Callistopollenites sp.
 * † Callucina
 * † Callucina glauca
 * † Calodontotherium
 * † Calodontotherium varietatum – type locality for species
 * † Calomys
 * † Calomys callosus
 * † Calomys musculinus
 * † Calomys sp.
 * † Calophyllum – or unidentified comparable form
 * † Calophyllum TY034informal
 * † Calyptocephalella
 * † Calyptocephalella canqueli – type locality for species
 * † Calyptocephalella sp.
 * † Calyptraea – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Calyptraea
 * † Calyptraea americana
 * † Calyptraea discoidalis
 * † Calyptraea juliana
 * † Calyptraea merriami – or unidentified comparable form
 * † Calyptraea pileus
 * † Calyptraea sp.
 * † Camargomendesia
 * † Camargomendesia sp.
 * † Camarozonosporites
 * † Camarozonosporites ambigens
 * † Camarozonosporites spp.
 * † Campanile
 * † Campanile benecki – or unidentified related form
 * † Campanile rarinodosum – or unidentified comparable form
 * † Campanorco – type locality for genus
 * † Campanorco
 * † Campanorco inauguralis – type locality for species
 * † Campanorco sp.
 * † Camphoromoea
 * † Camphoromoea speciosa
 * † Camptonectes
 * † Camptonectes sp.
 * † Cancellaria
 * † Cancellaria gracilis
 * † Canchadelphys – type locality for genus
 * † Canchadelphys cristata – type locality for species
 * † Canis
 * † Canis avus
 * † Canis familiaris
 * † Canis griseus
 * † Canis gymnocercus – or unidentified related form
 * † Canis gymnocercus
 * † Canis sp.
 * † Canthiumidites
 * † Canthiumidites bellus – or unidentified related form
 * † Caperea
 * † Caperea marginata
 * † Capulus – tentative report
 * † Capulus
 * † Capulus ladyae
 * † Capulus piramidensis
 * † Capulus sp.
 * † Carabites
 * † Carabites harringtoni – type locality for species
 * † Carabites schueli – type locality for species
 * † Carcharhinus
 * † Carcharhinus sp.
 * † Carcharias
 * † Carcharias acutissima
 * † Carcharias taurus
 * † Carcharodon – or unidentified comparable form
 * † Carcharodon
 * † Carcharodon auriculatus
 * † Carcharodon hastalis
 * † Carcharodon plicatilis
 * † Carcharodon sp.
 * † Carcharoides
 * † Carcharoides catticus
 * † Carcinophora
 * † Carcinophora pachyura – type locality for species
 * † Cardiatherium
 * † Cardiatherium chasicoense
 * † Cardiatherium orientalis – or unidentified related form
 * † Cardiatherium paranense – type locality for species
 * † Cardiatherium patagonicum – type locality for species
 * † Cardiatherium patagonicum
 * † Cardiatherium sp.
 * † Cardiocardita
 * † Cardiocardita inaequalis
 * † Cardiomys – tentative report
 * † Cardiomys – or unidentified comparable form
 * † Cardiomys
 * † Cardiomys ameghinorum
 * † Cardiomys sp.
 * † Carditella
 * † Carditella flabellum
 * † Carditella naviformis
 * † Carditella semen
 * † Cardium – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Cardium
 * † Cardium muliradiatum
 * † Cardium pisum
 * † Cardium puelchun
 * † Cardium sp.
 * † Cardium squamiferum
 * † Cardium suborbicularis
 * † Cariama
 * † Cariama santacrucensis – type locality for species
 * † Carlesia
 * † Carlesia pendolai – or unidentified comparable form
 * † Carlesia sp.
 * † Carlocebus – tentative report
 * † Carlocebus – or unidentified comparable form
 * † Carlocebus
 * † Carlocebus carmenensis – type locality for species
 * † Carlocebus carmenensis – or unidentified comparable form
 * † Carlocebus carmenensis
 * † Carlocebus intermedius – type locality for species
 * † Carodnia – type locality for genus
 * † Carodnia
 * † Carodnia feruglioi – type locality for species
 * † Carodnia feruglioi – or unidentified comparable form
 * † Caroloameghinia – type locality for genus
 * † Caroloameghinia
 * † Caroloameghinia intermedia – type locality for species
 * † Caroloameghinia mater – type locality for species
 * † Caroloameghinia mater
 * † Caroloameghinia tenuis – type locality for species
 * † Caroloameghinia tenuis
 * † Carolodarwinia – type locality for genus
 * † Carolodarwinia pyramidentata – type locality for species
 * † Carolopaulacoutoia
 * † Carolopaulacoutoia sp.
 * † Carolozittelia – type locality for genus
 * † Carolozittelia tapiroides – type locality for species
 * † Carpilius – tentative report
 * † Carpilius sp.
 * † Carpolithus
 * † Carpolithus bivascularis – type locality for species
 * † Carpolithus mirhojanus – type locality for species
 * † Carpolithus patagonicus – type locality for species
 * † Carpolithus patagonicus
 * † Carpolithus pichileufensis – type locality for species
 * † Caryocorbula
 * † Caryocorbula pulchella
 * † Casearia
 * † Casearia patagonica – type locality for species
 * † Cassia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Cassia
 * † Cassia argentinensis – type locality for species
 * † Cassia argentinensis
 * † Cassia longifolia
 * † Cassia oxleyi
 * † Cassia patagonica – type locality for species
 * † Cassia sp.
 * † Casuarina
 * † Casuarina palagonica – type locality for species
 * † Catagonus – or unidentified comparable form
 * † Catagonus
 * † Catagonus sp.
 * † Cathartes
 * † Cathartes fossilis – type locality for species
 * † Catinipollis
 * † Catinipollis geiseltalensis
 * † Catogenus
 * † Catogenus punctatus – type locality for species
 * † Cavia
 * † Cavia aperea
 * † Cavia sp.
 * † Caviocricetus – type locality for genus
 * † Caviocricetus
 * † Caviocricetus lucasi – type locality for species
 * † Caviocricetus lucasi
 * † Caviodon
 * † Caviodon australis
 * † Caviodon multiplicatus
 * † Caviodon sp.
 * † Cedrela
 * † Cedrela fissilis
 * † Cedrela mexicaniformis – type locality for species
 * † Cedrela pichileufuana – type locality for species
 * † Celastrophyllum
 * † Celastrophyllum elaeodendriforme – type locality for species
 * † Celastrophyllum fraunhoferifolium – type locality for species
 * † Celinapterix – type locality for genus
 * † Celinapterix bellissima – type locality for species
 * † Celtis – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Celtis
 * † Celtis ameghenoi – type locality for species
 * † Celtis ameghenoi
 * † Celtis ameghinoi
 * † Celtis sp.
 * † Cephalanthus
 * † Cephalanthus glabratifolius – type locality for species
 * † Cephalomyopsis
 * † Cephalomyopsis hipselodontus
 * † Cephalomyopsis morphotype 3informal
 * † Cephalomyopsis sp.
 * † Cephalomys – type locality for genus
 * † Cephalomys
 * † Cephalomys arcidens – type locality for species
 * † Cephalomys arcidens
 * † Cephalomys ceciae – type locality for species
 * † Cephalomys plexus – type locality for species
 * † Cephalomys plexus
 * † Cephalomys sp.
 * † Cephalorhynchus
 * † Cephalorhynchus eutropia – type locality for species
 * † Cerambycites
 * † Cerambycites wilmattae – type locality for species
 * † Ceratophrys
 * † Ceratophrys ameghinorum
 * † Ceratophrys sp.
 * † Ceratosporites
 * † Ceratosporites equalis
 * † Cerithiopsis
 * † Cerithiopsis juliana
 * † Cerithium
 * † Cerithium americanum
 * † Cerithium armoricense – or unidentified comparable form
 * † Cerodinium
 * † Cerodinium sp.
 * † Chaceon
 * † Chaceon peruvianus
 * † Chaetophractus
 * † Chaetophractus sp.
 * † Chaetophractus villosus – or unidentified comparable form
 * † Chaetophractus villosus
 * † Changquin – type locality for genus
 * † Changquin woodi – type locality for species
 * † Chapalmalania
 * † Chapalmalania alteafrontis
 * † Chasichimys
 * † Chasichimys bonaerense
 * † Chasicobradys – type locality for genus
 * † Chasicobradys intermedius – type locality for species
 * † Chasicostylus – type locality for genus
 * † Chasicostylus castroi – type locality for species
 * † Chasicotatus
 * † Chasicotatus ameghinoi
 * † Chasicotatus peiranoi – or unidentified comparable form
 * † Chasicotatus sp.
 * † Chasicotatus spinozai
 * † Chelonoidis
 * † Chelonoidis australis – type locality for species
 * † Chelonoidis australis – or unidentified comparable form
 * † Chenopodiineae
 * † Chenopodiineae sp.
 * † Chenopodipollis
 * † Chenopodipollis chenopodiaceoides
 * † Chenopodipollis multicavus
 * † Chenopodipollis sp.
 * † Chenopus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Chenopus santacruzensis
 * † Chesapecten
 * † Chesapecten patagonensis – type locality for species
 * † Chesapecten patagonensis
 * † Chicoreus
 * † Chicoreus guadalupei
 * † Chinchekoala – type locality for genus
 * † Chinchekoala qunita – type locality for species
 * † Chione – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Chione
 * † Chione casa
 * † Chione eupyga
 * † Chione patagonica
 * † Chione sp.
 * † Chione volckmanni
 * † Chionopsis
 * † Chionopsis australis – type locality for species
 * † Chionopsis sp.
 * † Chironectes
 * † Chironectes sp.
 * † Chlamyphractus
 * † Chlamyphractus pressulus
 * † Chlamys – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Chlamys
 * † Chlamys eupatagonicus
 * † Chlamys geminata
 * † Chlamys hupeanus
 * † Chlamys iheringi
 * † Chlamys iheringii
 * † Chlamys nicolasi
 * † Chlamys praenuncius – or unidentified comparable form
 * † Chlamys puntana
 * † Chlamys riggsi – type locality for species
 * † Chlamys salamanca – or unidentified related form
 * † Chlamys sp.
 * † Chloephaga
 * † Chloephaga sp. 1informal
 * † Chloephaga sp. 2informal
 * † Chlorophora
 * † Chlorophora tinctoria
 * † Chlorostoma
 * † Chlorostoma atrum
 * † Chorobates
 * † Chorobates scalabrini
 * † Chorobates sp.
 * † Chorobates villosissimus
 * † Chrysomelites
 * † Chrysomelites danielis – type locality for species
 * † Chrysophrys
 * † Chrysophrys sp.
 * † Chubutomys – type locality for genus
 * † Chubutomys
 * † Chubutomys leucoreios – type locality for species
 * † Chubutomys navaensis – type locality for species
 * † Chubutomys simpsoni – type locality for species
 * † Chubutomys simpsoni
 * † Chubutophis – type locality for genus
 * † Chubutophis grandis – type locality for species
 * † Chukimys – type locality for genus
 * † Chukimys favaloroi – type locality for species
 * † Chunga
 * † Chunga incerta
 * † Cicatricosisporites
 * † Cicatricosisporites sp.
 * † Cimomia
 * † Cimomia camachoi
 * † Cingulatisporites
 * † Cingulatisporites sp.
 * † Cingulotriletes
 * † Cingulotriletes australis
 * † Cingutriletes
 * † Cingutriletes australis
 * † Circulus
 * † Circulus pardelensis
 * † Cirsonella
 * † Cirsonella sp.
 * † Cirsotrema
 * † Cirsotrema cossmanni
 * † Cirsotrema rugulosa
 * † Cissites
 * † Cissites patagonica – type locality for species
 * † Cissites patagonicum
 * † Cissus
 * † Cissus pichileufensis – type locality for species
 * † Cladocora – tentative report
 * † Cladocora
 * † Cladocora gracilis – or unidentified comparable form
 * † Cladocora sp.
 * † Cladornis
 * † Cladornis pachypus
 * † Cladosictis – type locality for genus
 * † Cladosictis
 * † Cladosictis centralis – type locality for species
 * † Cladosictis patagonica – type locality for species
 * † Cladosictis patagonica – or unidentified comparable form
 * † Cladosictis patagonica
 * † Cladosictis sp. – type locality for species
 * † Cladosictis sp.
 * † Claenodon – tentative report
 * † Claenodon patagonicus – type locality for species
 * † Classopolis
 * † Classopolis sp. 2informal
 * † Classopollis
 * † Classopollis classoides
 * † Classopollis sp.
 * † Classopollis sp. 1informal
 * † Classopollis sp. 2informal
 * † Classopollis spp.
 * † Clausinella
 * † Clausinella gayi
 * † Clavatipollenites
 * † Clavatipollenites sp.
 * † Clavifera
 * † Clavifera triplex
 * † Clavipholas – tentative report
 * † Clavipholas pholadoides
 * † Clavus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Clavus
 * † Clavus bracaccinni
 * † Clavus santacrucensis
 * † Clavus santacruzensis
 * † Clavus sp.
 * † Clenia – type locality for genus
 * † Clenia
 * † Clenia brevis – type locality for species
 * † Clenia minuscula – type locality for species
 * † Clyomys – or unidentified related form
 * † Clyomys sp.
 * † Clypeotherium – type locality for genus
 * † Clypeotherium magnum – type locality for species
 * † Cnemidaria
 * † Cnemidaria sp.
 * † Cocatherium – type locality for genus
 * † Cocatherium lefipanum – type locality for species
 * † Coccodentalium
 * † Coccodentalium sp.
 * † Coccolithus
 * † Coccolithus cavus
 * † Coccoloba
 * † Coccoloba ruizianiforma – type locality for species
 * † Cochilius – type locality for genus
 * † Cochilius
 * † Cochilius fumensis – type locality for species
 * † Cochilius sp.
 * † Cochliomya
 * † Cochliomya macellaria
 * † Cochlops
 * † Cochlops muricatus
 * † Cochlops sp.
 * † Cochlospermaceae – tentative report
 * † Cochlospermaceae SA 019informal
 * † Cochlospermum – or unidentified comparable form
 * † Cochlospermum
 * † Cochlospermum previtifolium – type locality for species
 * † Cochlospermum previtifolium
 * † Coelastrum
 * † Coelastrum sp.
 * † Coelopis
 * † Coelopis striata
 * † Coelosoma
 * † Coelosoma eversa
 * † Coelostylodon – type locality for genus
 * † Coelostylodon
 * † Coelostylodon caroloameghinoi – type locality for species
 * † Coelostylodon florentinoameghinoi – type locality for species
 * † Coelutaetus – type locality for genus
 * † Coelutaetus cribellatus – type locality for species
 * † Colaptes
 * † Colaptes campestris
 * † Colbertia – type locality for genus
 * † Colbertia
 * † Colbertia lumbrerense – type locality for species
 * † Colbertia sp.
 * † Colhuapia – type locality for genus
 * † Colhuapia rosei – type locality for species
 * † Colhueconus
 * † Colhueconus simpsoni
 * † Colhuelia – type locality for genus
 * † Colhuelia fruhi – type locality for species
 * † Collonista
 * † Collonista philippi
 * † Colomys
 * † Colomys sp.
 * † Colossoma
 * † Colossoma macropomus
 * † Colpodon – or unidentified comparable form
 * † Colpodon
 * † Colpodon distinctus – type locality for species
 * † Colpodon distinctus
 * † Colpodon sp.
 * † Colpospirella
 * † Colpospirella algida
 * † Colpostemma
 * † Colpostemma sp.
 * † Columbarium
 * † Columbarium archimedis
 * † Columbrarum
 * † Columbrarum archimedes
 * † Colus – or unidentified related form
 * † Colus delrioae
 * † Comaphorus
 * † Comaphorus concisus
 * † Cominella
 * † Cominella patagonica
 * † Cominella tumida
 * † Compositoipollenites
 * † Compositoipollenites tarragoensis – or unidentified related form
 * † Concavisporites
 * † Concavisporites sp. Iinformal
 * † Concavisporites sp. IIinformal
 * † Concolpites
 * † Concolpites leptos
 * † Confertisulcites
 * † Confertisulcites sp. 1informal
 * † Confertisulcites sp. 2informal
 * † Contracavia
 * † Contracavia sp.
 * † Contrerascynus – type locality for genus
 * † Contrerascynus borhyaenoides – type locality for species
 * † Conus
 * † Conus infulatus – or unidentified related form
 * † Conus patagonicus
 * † Conus sp.
 * † Converrucosisporites
 * † Converrucosisporites sp.
 * † Convolutispora
 * † Convolutispora sp. 1informal
 * † Coona – type locality for genus
 * † Coona
 * † Coona gaudryi – type locality for species
 * † Coona gutierrezi – type locality for species
 * † Coona pattersoni – type locality for species
 * † Coprosma – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Coprosma
 * † Coprosma incerta – type locality for species
 * † Coprosma incerta
 * † Coprosma spathulatifolia – type locality for species
 * † Coprosoma
 * † Coprosoma incerta
 * † Coptospora
 * † Coptospora archangelskyi
 * † Coptospora sp.
 * † Coquenia – type locality for genus
 * † Coquenia – or unidentified comparable form
 * † Coquenia bondi – type locality for species
 * † Coquenia sp.
 * † Corbicula
 * † Corbicula pehuenchensis
 * † Corbula
 * † Corbula juliana
 * † Cordana
 * † Cordana sp.
 * † Cordioxylon
 * † Cordioxylon prototrichotoma – type locality for species
 * † Coresodon
 * † Coresodon scalpridens
 * † Coresodon sp.
 * † Corizus – tentative report
 * † Corizus deflagratus
 * † Corrugatisporites
 * † Corrugatisporites argentinus
 * † Corsinipollenites
 * † Corsinipollenites atlantica
 * † Corsinipollenites sp.
 * † Corydoras
 * † Corydoras paleatus
 * † Coscinocercus
 * † Coscinocercus brachyurus
 * † Coscinocercus marcalaini
 * † Coscinocercus sp.
 * † Cossonus – tentative report
 * † Cossonus devoratus
 * † Costacopluma
 * † Costacopluma australis – type locality for species
 * † Costacopluma salamanca – type locality for species
 * † Coussarea
 * † Coussarea tertiaria – type locality for species
 * † Cramauchenia – type locality for genus
 * † Cramauchenia
 * † Cramauchenia normalis – type locality for species
 * † Cramauchenia normalis
 * † Cranithlastus – type locality for genus
 * † Cranithlastus xibiensis – type locality for species
 * † Cranwellipollis
 * † Cranwellipollis apiculatus – or unidentified comparable form
 * † Crassatella
 * † Crassatella brandmayri – type locality for species
 * † Crassatella kokeni
 * † Crassatella patagonica
 * † Crassatella sp.
 * † Crassiorites – type locality for genus
 * † Crassiorites
 * † Crassiorites australis – type locality for species
 * † Crassiorites australis
 * † Crassostrea – tentative report
 * † Crassostrea
 * † Crassostrea hatcheri – tentative report
 * † Crassostrea hatcheri – or unidentified comparable form
 * † Crassostrea hatcheri
 * † Crassostrea patagonica
 * † Crassotrea
 * † Crassotrea hatcheri
 * † Crepidula
 * † Crepidula ancestra
 * † Crepidula gregaria
 * † Crepidula onyx
 * † Crepidula protea
 * † Crepidula sp.
 * † Crepipatella
 * † Crepipatella dilatata
 * † Cricetinarum
 * † Cricetinarum sp.
 * † Cricotriporites – or unidentified comparable form
 * † Cricotriporites
 * † Cricotriporites guianensis
 * † Cricotriporites sp.
 * † Crossea
 * † Crossea pilula
 * † Crucibulum
 * † Crucibulum multicostatum
 * † Cruciplacolithus
 * † Cruciplacolithus primus
 * † Cruschedula
 * † Cruschedula revola
 * † Cryptocaryoides – type locality for genus
 * † Cryptocaryoides mariasantisimensis – type locality for species
 * † Cryptophagus
 * † Cryptophagus sunchalensis – type locality for species
 * † Cryptorhytis
 * † Cryptorhytis sp. Ainformal
 * † Ctenocheles
 * † Ctenocheles sp.
 * † Ctenomys
 * † Ctenomys chapadmalensis
 * † Ctenomys kraglievichi
 * † Ctenomys lujanensis
 * † Ctenomys magellanicus
 * † Ctenomys sp.
 * † Ctenomys talarum – or unidentified comparable form
 * † Ctenomys talarum
 * † Cubitostrea
 * † Cubitostrea alvarezii
 * † Cubitostrea primordialis – type locality for species
 * † Cubitostrea sp.
 * † Cucullaea – tentative report
 * † Cucullaea
 * † Cucullaea alta – or unidentified comparable form
 * † Cucullaea alta
 * † Cucullaea antarctica
 * † Cucullaea barbara
 * † Cucullaea fuegunensis – type locality for species
 * † Cucullaea grahamensis
 * † Cucullaea marshalli – type locality for species
 * † Cucullaea marshalli – or unidentified comparable form
 * † Cucullaea marshalli
 * † Cucullaea patagonensis
 * † Cucullaea plana
 * † Cucullaea sp.
 * † Cucullaea sp. Cinformal
 * † Cucullaria
 * † Cucullaria darwini
 * † Cullinia
 * † Cullinia sp.
 * † Cunampaia – type locality for genus
 * † Cunampaia simplex – type locality for species
 * † Cupania – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Cupania
 * † Cupania cordinii – type locality for species
 * † Cupania grosse-serrata
 * † Cupania grosseserrata
 * † Cupania incerta – type locality for species
 * † Cupania latifolioides – type locality for species
 * † Cupania latifolioides
 * † Cupania patagonica – type locality for species
 * † Cupania sp.
 * † Cupania vernaliformis – type locality for species
 * † Cupanieidites
 * † Cupanieidites reticularis
 * † Cupressinoxylon
 * † Cupressinoxylon sp.
 * † Curculionites
 * † Curculionites angustior – type locality for species
 * † Curculionites epistictus – type locality for species
 * † Curculionites eustictus – type locality for species
 * † Curculionites harringtoni
 * † Curculionites jujuyensis
 * † Curculionites latiusculus – type locality for species
 * † Curculionites magdalinus – type locality for species
 * † Curculionites megastictus – type locality for species
 * † Curculionites microstictus – type locality for species
 * † Curculionites parastictus – type locality for species
 * † Curculionites stebingeri – type locality for species
 * † Curculionites sunchalicus – type locality for species
 * † Curculionites wielandi
 * † Currugatisporites
 * † Currugatisporites argentinus
 * † Curviarculia – type locality for genus
 * † Curviarculia
 * † Curviarculia delicata – type locality for species
 * † Curviarculia lamasi – type locality for species
 * † Cuspidaria
 * † Cuspidaria sp.
 * † Cuyenopteris – type locality for genus
 * † Cuyenopteris
 * † Cuyenopteris patagoniensis – type locality for species
 * † Cuyenopteris patagoniensis
 * † Cyamium
 * † Cyamium sp.
 * † Cyanoliseus
 * † Cyanoliseus patagonus – or unidentified comparable form
 * † Cyatheacidites
 * † Cyatheacidites annulata – or unidentified comparable form
 * † Cyatheacidites annulatus
 * † Cyathidites
 * † Cyathidites australis
 * † Cyathidites congoensis
 * † Cyathidites minor
 * † Cyathidites paleospora
 * † Cyathidites patagonicus
 * † Cyathidites spp.
 * † Cycadopites
 * † Cycadopites sp.
 * † Cycadopites spp.
 * † Cyclagelosphaera
 * † Cyclagelosphaera sp.
 * † Cyclapophysis
 * † Cyclapophysis monmouthensis
 * † Cyclocardia
 * † Cyclocardia compressum
 * † Cyclocardia nortensis
 * † Cyclocephala
 * † Cyclocephala signaticollis
 * † Cyclotella
 * † Cyclotella sp.
 * † Cyclusphaera
 * † Cyclusphaera psilata – or unidentified comparable form
 * † Cylindriscala
 * † Cylindriscala sp.
 * † Cymatium – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Cymatium
 * † Cymatium rada
 * † Cymatium usurpator
 * † Cyonasua
 * † Cyonasua argentina
 * † Cyonasua brevirostris
 * † Cyonasua groeberi – type locality for species
 * † Cyonasua pascuali – type locality for species
 * † Cyonasua prebrevirostris
 * † Cyonasua sp.
 * † Cyperaceaepollis
 * † Cyperaceaepollis neogenicus
 * † Cyperocarpus
 * † Cyperocarpus sp. 1informal
 * † Cyprinodon – tentative report
 * † Cyprinodon primulus – type locality for species
 * † Cyrtopleura
 * † Cyrtopleura lanceolata
 * † Cytherea
 * † Cytherea munsteri
 * † Dacrycarpites
 * † Dacrycarpites australiensis – or unidentified comparable form
 * † Dacrycarpites australiensis
 * † Dacrycarpites australliensis
 * † Dacrycarpites sp.
 * † Dacrycarpus
 * † Dacrycarpus puertae
 * † Dacrydiumites
 * † Dacrydiumites florinii
 * † Dacrydiumites praecupressinoides
 * † Dalbergia
 * † Dalbergia patagonica – type locality for species
 * † Damassadinium
 * † Damassadinium californicum
 * † Dasyatis
 * † Dasyatis sp.
 * † Dasypodidarum
 * † Dasypodidarum sp.
 * † Dasypus
 * † Dasypus hybridus
 * † Dasypus neogaeus
 * † Degonia
 * † Degonia sympathica – type locality for species
 * † Delectopecten
 * † Delectopecten neuquenensis
 * † Deltoidospora
 * † Deltoidospora australis
 * † Deltoidospora minor
 * † Deltoidospora neddeni
 * † Deltoidospora sp.
 * † Dendrocygna
 * † Dendrocygna sp.
 * † Densoisporites
 * † Densoisporites velatus
 * † Dentalium
 * † Dentalium asperum
 * † Dentalium cazadoriana
 * † Dentalium giganteum
 * † Dentalium iheringi
 * † Dentalium magnumcostatum
 * † Dentalium pardelensis
 * † Dentalium preservatum
 * † Dentalium prudens
 * † Dentalium sp.
 * † Dentalium sulcosum
 * † Dentalium superbus
 * † Depressiscala
 * † Depressiscala nitidella – or unidentified related form
 * † Dermestes
 * † Dermestes maculatus
 * † Derorhynchus
 * † Derorhynchus minutus – or unidentified related form
 * † Derorhynchus minutus – or unidentified comparable form
 * † Derorhynchus sp.
 * † Deseadomys – type locality for genus
 * † Deseadomys
 * † Deseadomys arambourgi – type locality for species
 * † Deseadomys arambourgi
 * † Deuterotherium
 * † Deuterotherium distichum
 * † Deuterotherium sp.
 * † Devincenzia – tentative report
 * † Devincenzia sp.
 * † Diadiaphorus – tentative report
 * † Diadiaphorus – or unidentified comparable form
 * † Diadiaphorus
 * † Diadiaphorus caniadensis – type locality for species
 * † Diadiaphorus laternarium
 * † Diadiaphorus majusculus
 * † Diadiaphorus paranensis
 * † Diadiaphorus robustus – type locality for species
 * † Diadiaphorus sp.
 * † Diaphorocetus – type locality for genus
 * † Diaphorocetus poucheti – type locality for species
 * † Diaphoromys
 * † Diaphoromys sp.
 * † Diatenopteryx
 * † Diatenopteryx fossilis – type locality for species
 * † Diatenopteryx sorbifoliiforma – type locality for species
 * † Dicardia
 * † Dicardia fissa
 * † Dicellaesporites
 * † Dicellaesporites spp.
 * † Dicksonia
 * † Dicksonia patagonica – type locality for species
 * † Dictyophyllidites
 * † Dictyophyllidites arcuatus
 * † Dictyophyllidites chiquimilense
 * † Dictyophyllidites concavus
 * † Dictyophyllidites harrisii
 * † Dictyophyllidites mortoni
 * † Dictyophyllidites sp.
 * † Didelphis
 * † Didelphis brachyodonta
 * † Didelphis reigi – type locality for species
 * † Didelphis reigi
 * † Didelphis sp.
 * † Didelphopsis
 * † Didelphopsis sp.
 * † Didolodus – type locality for genus
 * † Didolodus
 * † Didolodus latigonus – type locality for species
 * † Didolodus magnus – type locality for species
 * † Didolodus minor – type locality for species
 * † Didolodus minor
 * † Didolodus multicuspis – type locality for species
 * † Didolodus multicuspis
 * † Didolodus sp.
 * † Diloboderus
 * † Diloboderus abderus
 * † Dilobodon
 * † Dilobodon lutarius
 * † Dilwynites
 * † Dilwynites tuberculatus – or unidentified comparable form
 * † Dinocardium
 * † Dinocardium novus – type locality for species
 * † Dinoflagellate
 * † Dinoflagellate cysts
 * † Dinotoxodon
 * † Dinotoxodon paranensis
 * † Dioon
 * † Dioon sp.informal
 * † Dioplotherium
 * † Dioplotherium sp.
 * † Diplodetis
 * † Diplodetis nutrix
 * † Diplodon – type locality for genus
 * † Diplodon
 * † Diplodon ampliatus – type locality for species
 * † Diplodon glaucus
 * † Diplodon sp.
 * † Diplodonta
 * † Diplodonta vilardeboaena
 * † Diporicellaesporites
 * † Diporicellaesporites sp.
 * † Diporisporites
 * † Diporisporites elongatus
 * † Diporisporites sp.
 * † Diporites
 * † Diporites aspis
 * † Dipsidripella
 * † Dipsidripella sp.
 * † Dischides
 * † Dischides patagonicum
 * † Disparilia
 * † Disparilia sp.
 * † Distaverrusporites
 * † Distaverrusporites simplex – or unidentified comparable form
 * † Distylophorus – type locality for genus
 * † Distylophorus
 * † Distylophorus alouatinus – type locality for species
 * † Distylophorus alouatinus
 * † Doedicurus
 * † Doedicurus clavicaudatus
 * † Doedicurus sp.
 * † Doellomys
 * † Doellomys sp.
 * † Doellotatus – or unidentified comparable form
 * † Doellotatus
 * † Doellotatus chapadmalensis
 * † Doellotatus inornatus – or unidentified comparable form
 * † Doellotatus inornatus
 * † Doellotatus praecursor – or unidentified comparable form
 * † Doellotatus sp.
 * † Dolicavia
 * † Dolicavia minuscula
 * † Dolicavia sp.
 * † Dolichocebus
 * † Dolichocebus gaimanensis
 * † Dolichoderus – tentative report
 * † Dolichoderus sp.
 * † Dolichostylodon – type locality for genus
 * † Dolichostylodon saltensis – type locality for species
 * † Dolichotis
 * † Dolichotis patagonum
 * † Dolichotis sp.
 * † Doliocarpus
 * † Doliocarpus oblongifolia
 * † Doroteoxylon
 * † Doroteoxylon vicentiperezii
 * † Dosinia
 * † Dosinia burmeisteri
 * † Dosinia cuspidata – type locality for species
 * † Dosinia laeviuscula
 * † Dosinia laeviusucula
 * † Dosinia meridionalis
 * † Dosinia meridonalis
 * † Dosinia salarensis
 * † Dosinia sp.
 * † Draconomys – type locality for genus
 * † Draconomys verai – type locality for species
 * † Drimys
 * † Drimys patagonica – type locality for species
 * † Dryadopollis
 * † Dryadopollis sp.1informal
 * † Dryophyllum
 * † Dryophyllum australis – type locality for species
 * † Dryophyllum australis
 * † Dryopteris
 * † Dryopteris sp.
 * † Dryornis – type locality for genus
 * † Dryornis pampeanus – type locality for species
 * † Dryoxylon
 * † Dryoxylon spp.
 * † Drytomomys
 * † Drytomomys sp.
 * † Dudumus – type locality for genus
 * † Dudumus ruigomezi – type locality for species
 * † Dusicyon
 * † Dusicyon avus
 * † Dusicyon sp.
 * † Dyadosporites
 * † Dyadosporites annulatus
 * † Eatoniella
 * † Eatoniella sp.
 * † Echinorhinus
 * † Echinorhinus pozzii
 * † Echinosporis
 * † Echinosporis sp.
 * † Echiperiporites
 * † Echiperiporites parviechinatus
 * † Echiperiporites sp.
 * † Echites
 * † Echites tertiaria – type locality for species
 * † Echitriporites
 * † Echitriporites sp.
 * † Edvardocopeia – type locality for genus
 * † Edvardocopeia sinuosa – type locality for species
 * † Edvardotrouessartia – type locality for genus
 * † Edvardotrouessartia
 * † Edvardotrouessartia sola – type locality for species
 * † Edvardotrouessartia sola
 * † Elaeocarpoxylon
 * † Elaeocarpoxylon sloaneoides – type locality for species
 * † Elassotherium
 * † Elassotherium altirostre
 * † Elassotherium sp.
 * † Elaterites
 * † Elaterites bruchi – type locality for species
 * † Elaterites microstictus – type locality for species
 * † Electroma
 * † Electroma patagonica – type locality for species
 * † Eleutherocercus
 * † Eleutherocercus antiquus
 * † Eleutherocercus paranensis
 * † Eligmodontia
 * † Eligmodontia typus – or unidentified comparable form
 * † Eligmodontia typus
 * † Elmerriggsia – type locality for genus
 * † Elmerriggsia fieldia – type locality for species
 * † Embothriophyllum
 * † Embothriophyllum dubium
 * † Embothrites
 * † Embothrites sp.informal
 * † Embothrium – tentative report
 * † Embothrium
 * † Embothrium precoccineum – type locality for species
 * † Embothrium precoccineum
 * † Embothrium pregrandiflorum – type locality for species
 * † Embothrium pregrandiflorum
 * † Encinepeltus
 * † Encinepeltus petesatus
 * † Enneoconus
 * † Enneoconus parvidens – type locality for species
 * † Ensis
 * † Ensis macha
 * † Entobia
 * † Entobia sp.
 * † Eoastrapostylops – type locality for genus
 * † Eoastrapostylops riolorense – type locality for species
 * † Eoauchenia
 * † Eoauchenia cingulata
 * † Eoauchenia primitiva – or unidentified related form
 * † Eoauchenia primitiva – or unidentified comparable form
 * † Eoauchenia primitiva
 * † Eoauchenia sp.
 * † Eocaiman – type locality for genus
 * † Eocaiman
 * † Eocaiman cavernensis – type locality for species
 * † Eocaiman palaeocenicus – type locality for species
 * † Eocaiman palaeocenicus
 * † Eocardia
 * † Eocardia excavata
 * † Eocardia montana
 * † Eocardia sp.
 * † Eocoelophorus
 * † Eocoelophorus chapalmalensis
 * † Eohegetotherium – type locality for genus
 * † Eohegetotherium priscum – type locality for species
 * † Eohyrax – tentative report
 * † Eohyrax
 * † Eohyrax brachyodus – type locality for species
 * † Eohyrax isotemnoides – type locality for species
 * † Eohyrax isotemnoides – tentative report
 * † Eohyrax isotemnoides
 * † Eohyrax platyodus – type locality for species
 * † Eohyrax praerusticus – type locality for species
 * † Eohyrax praerusticus
 * † Eohyrax rusticus – type locality for species
 * † Eohyrax rusticus
 * † Eohyrax sp.
 * † Eolicaphrium – type locality for genus
 * † Eolicaphrium primarium – type locality for species
 * † Eomegatherium
 * † Eomegatherium nanum
 * † Eomicrobiotherium
 * † Eomicrobiotherium matutinum – type locality for species
 * † Eomicrobiotherium matutinum
 * † Eomicrobiotherium mykerum – type locality for species
 * † Eomicrobiotherium mykerum
 * † Eomicrobiotherium sp.
 * † Eomorphippus – type locality for genus
 * † Eomorphippus – tentative report
 * † Eomorphippus
 * † Eomorphippus obscurus – type locality for species
 * † Eomorphippus obscurus
 * † Eomorphippus pascuali – type locality for species
 * † Eomorphippus pascuali
 * † Eomorphippus sp.
 * † Eoneornis
 * † Eoneornis australis
 * † Eopachyrucos – type locality for genus
 * † Eopachyrucos
 * † Eopachyrucos pliciferus – type locality for species
 * † Eopachyrucos pliciferus
 * † Eopachyrucos pliciformis – type locality for species
 * † Eopachyrucos pliciformis
 * † Eopachyrucos sp.
 * † Eophractus – type locality for genus
 * † Eophractus casamayorensis – type locality for species
 * † Eosclerocalyptus
 * † Eosclerocalyptus planus
 * † Eosclerocalyptus proximus
 * † Eosclerocalyptus sp.
 * † Eosclerocalyptus tapinocephalus
 * † Eosteiromys – tentative report
 * † Eosteiromys
 * † Eosteiromys annectens
 * † Eosteiromys homogenidens – or unidentified comparable form
 * † Eosteiromys homogenidens
 * † Eosteiromys segregatus
 * † Eosteiromys sp.
 * † Eoturris
 * † Eoturris jorgensis
 * † Eoturris sanatacrucensis
 * † Eoturris santacrucensis
 * † Eoturris unifascialis
 * † Eoviscaccia – tentative report
 * † Eoviscaccia
 * † Eoviscaccia australis – type locality for species
 * † Eoviscaccia australis
 * † Eoviscaccia sp.
 * † Epecuenia
 * † Epecuenia thoatherioides
 * † Ephedra
 * † Ephedra sp.
 * † Ephedripites
 * † Ephedripites claricristatus
 * † Ephedripites lusaticus
 * † Ephedripites sp.
 * † Epidolops
 * † Epidolops sp.
 * † Epieuryceros
 * † Epieuryceros sp.
 * † Epieuryceros truncus
 * † Epiklohnia – type locality for genus
 * † Epiklohnia verticalis – type locality for species
 * † Epipatriarchus
 * † Epipatriarchus sp.
 * † Epipedonota
 * † Epipedonota cristallisata
 * † Epitonium
 * † Epitonium albidum
 * † Epitonium angulatum
 * † Epitonium brocherti
 * † Epitonium chubutinum
 * † Epitonium cingolanii
 * † Epitonium cionei
 * † Epitonium georgettinum
 * † Epitonium humphreysii
 * † Epitonium leptosomum
 * † Epitonium multistriatum
 * † Epitonium novangliae – or unidentified related form
 * † Epitonium quirogai
 * † Epitonium rugolosa
 * † Epitonium rugulosa
 * † Epitonium sp.
 * † Epitonium tonni
 * † Epitonium unifasciatum
 * † Epitonium venosum
 * † Epitypotherium – type locality for genus
 * † Epitypotherium cancellatum – type locality for species
 * † Equisetosporites
 * † Equisetosporites claricristatus
 * † Equisetosporites lusaticus
 * † Equisetosporites notensis
 * † Equisetosporites sp.
 * † Equus
 * † Equus caballus – or unidentified comparable form
 * † Equus caballus
 * † Equus curvidens – or unidentified comparable form
 * † Equus sp.
 * † Erethizon
 * † Erethizon sp.
 * † Eretiscus – type locality for genus
 * † Eretiscus
 * † Eretiscus tonnii – type locality for species
 * † Eretiscus tonnii
 * † Erichosaurus – type locality for genus
 * † Erichosaurus
 * † Erichosaurus bombimaxila – type locality for species
 * † Erichosaurus debilis – type locality for species
 * † Erichosaurus diminutus – type locality for species
 * † Ericipites
 * † Ericipites microtectanum
 * † Ericipites microtectatum – type locality for species
 * † Ericipites microtectatum
 * † Ericipites scabratus
 * † Eriphyla
 * † Eriphyla drygalskiana
 * † Eriphyla meridiana
 * † Ernestohaeckelia – type locality for genus
 * † Ernestohaeckelia
 * † Ernestohaeckelia aculeata – type locality for species
 * † Ernestohaeckelia acutidens – type locality for species
 * † Ernestokokenia – or unidentified comparable form
 * † Ernestokokenia
 * † Ernestokokenia chaishoer – type locality for species
 * † Ernestokokenia nitida – type locality for species
 * † Ernestokokenia nitida
 * † Ernestokokenia patagonica – type locality for species
 * † Ernestokokenia sp.
 * † Ernestokokenia trigonalis – type locality for species
 * † Ernestokokenia yirunhor – type locality for species
 * † Ernestokokenia yirunhor – tentative report
 * † Erythrina
 * † Erythrina cristagalli
 * † Erythroxylon
 * † Erythroxylon cuneifolioides – type locality for species
 * † Erythroxylon cuneifolioides
 * † Escallonia – tentative report
 * † Escallonia
 * † Escallonia sp.
 * † Escallonia TY043informal
 * † Escalloniiphyllum
 * † Escalloniiphyllum sp.
 * † Escribania – type locality for genus
 * † Escribania
 * † Escribania chubutensis – type locality for species
 * † Escribania talonicuspis – type locality for species
 * † Ethelomys – type locality for genus
 * † Ethelomys loomisi – type locality for species
 * † Eubalaena
 * † Eubalaena sp.
 * † Eucalyptus
 * † Eucalyptus caldericola
 * † Eucalyptus frenguelliana
 * † Eucelophorus
 * † Eucelophorus cabrerai
 * † Eucelophorus chapalmalensis – or unidentified comparable form
 * † Eucholoeops
 * † Eucholoeops fronto – or unidentified comparable form
 * † Eucholoeops fronto
 * † Eucholoeops ingens
 * † Eucholoeops sp.informal
 * † Eucholoeops sp.
 * † Euclastes – type locality for genus
 * † Euclastes
 * † Euclastes meridionalis – type locality for species
 * † Euclastes meridionalis
 * † Eucryphia
 * † Eucryphia tertiaria – type locality for species
 * † Eucryphiaceoxylon
 * † Eucryphiaceoxylon eucryphioides
 * † Eudolium
 * † Eudolium lissiei
 * † Eudolops – type locality for genus
 * † Eudolops
 * † Eudolops hernandezi – type locality for species
 * † Eudolops tetragonus – type locality for species
 * † Eudolops tetragonus
 * † Eudromia
 * † Eudromia elegans – or unidentified comparable form
 * † Eudromia sp.
 * † Eulamaops
 * † Eulamaops paralellus
 * † Eulima
 * † Eulima subventricosa
 * † Eumarcia
 * † Eumarcia arenosa – or unidentified related form
 * † Eumegamys – tentative report
 * † Eumegamys
 * † Eumegamys sp.
 * † Eumegamysops
 * † Eumegamysops sp.
 * † Eumetopias
 * † Eumetopias jubata
 * † Eumetula
 * † Eumetula michaelseni
 * † Eumetula pulla
 * † Eumysops
 * † Eumysops cavoides
 * † Eumysops formosus
 * † Eumysops laeviplicatus
 * † Eumysops parodii
 * † Eumysops sp.
 * † Eunotia
 * † Eunotia sp.
 * † Euphractus
 * † Euphractus patagonicus – or unidentified comparable form
 * † Euphractus patagonicus
 * † Eupsophus
 * † Eupsophus sp.
 * † Eurhomalea – tentative report
 * † Eurhomalea
 * † Eurhomalea difficilis
 * † Eurhomalea exalbida
 * † Eurhomalea fuenzalidai – or unidentified comparable form
 * † Eurygenium – type locality for genus
 * † Eurygenium latirostris – type locality for species
 * † Eurystephanodon
 * † Eurystephanodon cattanii – type locality for species
 * † Eurystephanodon crassatus – type locality for species
 * † Euspira
 * † Euspira pueyrredonensis – or unidentified comparable form
 * † Euspira santacruzensis
 * † Euspira sp.
 * † Eutatus
 * † Eutatus carinatus
 * † Eutatus deleo
 * † Eutatus lagena
 * † Eutatus seguini – or unidentified comparable form
 * † Eutatus seguini
 * † Eutatus sp.
 * † Eutelornis
 * † Eutelornis patagonicus
 * † Eutomodus
 * † Eutomodus elautus
 * † Eutrachytherus
 * † Eutrachytherus grandis – type locality for species
 * † Eutrephoceras
 * † Eutrephoceras sp.
 * † Eutrochodon – type locality for genus
 * † Eutrochodon inceptus – type locality for species
 * † Euxylophoroxylon – type locality for genus
 * † Euxylophoroxylon chiquichanense – type locality for species
 * † Evolestes
 * † Evolestes sp.
 * † Fagara
 * † Fagara serrata – type locality for species
 * † Fagnanoa
 * † Fagnanoa dubiosa
 * † Fagnonoa
 * † Fagnonoa aequistriata
 * † Fagophyllum
 * † Fagophyllum duseni – type locality for species
 * † Fagophyllum duseni
 * † Fagus
 * † Fagus dicksoni
 * † Fagus integrifolia
 * † Fagus subferruginea
 * † Fagus subferrunginea
 * † Fannia
 * † Fannia sp.
 * † Faramea
 * † Faramea miocenica – type locality for species
 * † Faveasporis
 * † Faveasporis areapunctatis
 * † Favitricolpites
 * † Favitricolpites australis – type locality for species
 * † Favitricolporites
 * † Favitricolporites australis – type locality for species
 * † Favitricolporites australis
 * † Felis
 * † Felis listai
 * † Ficus
 * † Ficus carolina
 * † Ficus distans
 * † Ficus patagonica – type locality for species
 * † Ficus posadasensis
 * † Ficus sp.
 * † Ficus tressensii
 * † Fieratherium – type locality for genus
 * † Fieratherium sorex – type locality for species
 * † Filicites
 * † Filicites sp.
 * † Fissurella
 * † Fissurella oriens
 * † Fissurella picta
 * † Fissurella radiosa
 * † Fissurella sp.
 * † Fissurellidea
 * † Fissurellidea hiantula – or unidentified related form
 * † Fitzroya
 * † Fitzroya tertiaria – type locality for species
 * † Fitzroya tertiaria
 * † Flabellipecten
 * † Flabellipecten pyramidesensis
 * † Flabellum
 * † Flabellum cuneiforme – or unidentified comparable form
 * † Flabellum sp.
 * † Florentinoameghinia – type locality for genus
 * † Florentinoameghinia
 * † Florentinoameghinia mystica – type locality for species
 * † Florentinoameghinia mystica
 * † Foetopterus – type locality for genus
 * † Foetopterus ambiguus – type locality for species
 * † Forcipites
 * † Forcipites longus – or unidentified comparable form
 * † Foveosporites
 * † Foveosporites lacunosus – or unidentified comparable form
 * † Foveotriletes
 * † Foveotriletes microfoveolatus
 * † Foveotriletes palaequetrus – or unidentified comparable form
 * † Foveotriletes palaequetrus
 * † Foveotriletes parvirectus – or unidentified comparable form
 * † Frenguellia – type locality for genus
 * † Frenguellia
 * † Frenguellia iglesiasi – type locality for species
 * † Frenguellia patagonica – type locality for species
 * † Fuchsia
 * † Fuchsia sp.
 * † Fuegotrophon
 * † Fuegotrophon asperum
 * † Fuegotrophon flinti
 * † Fuegotrophon turneri
 * † Fusimitra
 * † Fusimitra carlosi
 * † Fusinus
 * † Fusinus patagoniensis – type locality for species
 * † Fusinus sp.
 * † Fyfea
 * † Fyfea beui
 * † Fyfea lirata
 * † Fyfea sp.
 * † Gabonisporis
 * † Gabonisporis vigourouxii
 * † Gaffneylania – type locality for genus
 * † Gaffneylania auricularis – type locality for species
 * † Gaimanomys – type locality for genus
 * † Gaimanomys alwinea – type locality for species
 * † Gaimanophis – type locality for genus
 * † Gaimanophis tenuis – type locality for species
 * † Galea
 * † Galea musteloides
 * † Galea sp.
 * † Galeocerdo
 * † Galeocerdo aduncus
 * † Galeodea – or unidentified related form
 * † Galeodea mirabilis
 * † Galictis
 * † Galictis sorgentini
 * † Galileomys – type locality for genus
 * † Galileomys
 * † Galileomys antelucanus – type locality for species
 * † Galileomys antelucanus
 * † Galileomys baios – type locality for species
 * † Galileomys colloncurensis – type locality for species
 * † Galileomys eurygnathus – type locality for species
 * † Galileomys eurygnathus
 * † Gamerroides
 * † Gamerroides psilasaccus – or unidentified comparable form
 * † Gamerroites
 * † Gamerroites psilasaccus – or unidentified comparable form
 * † Gamerroites psilasaccus
 * † Gamerroites psilassacus
 * † Gari – tentative report
 * † Gari sp.
 * † Garridomys – type locality for genus
 * † Garridomys curunuquem – type locality for species
 * † Gashternia – type locality for genus
 * † Gashternia
 * † Gashternia ctalehor – type locality for species
 * † Gashternia ctalehor
 * † Gashternia sp.
 * † Gastrochaenolites
 * † Gastrochaenolites sp.
 * † Gauthieria
 * † Gauthieria menuthiae
 * † Gelasinicysta
 * † Gelasinicysta vangeelii
 * † Gemmatricolpites
 * † Gemmatricolpites sp. 1informal
 * † Gemmatricolpites subsphaericus – type locality for species
 * † Gemmatricolpites subsphaericus – or unidentified comparable form
 * † Gemmatricolpites subsphaericus
 * † Genotia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Genotia cruzensis
 * † Geochelone
 * † Geochelone gringorum – type locality for species
 * † Geochelone gringorum
 * † Geochelone sp.
 * † Gibbula
 * † Gibbula dalli
 * † Gibbula diametralis
 * † Gibbula iheringi
 * † Gibbula margaritoides
 * † Gibbula philippi
 * † Ginkgo
 * † Ginkgo patagonica
 * † Gleicheniidites
 * † Gleicheniidites argentinus – or unidentified comparable form
 * † Gleicheniidites cercinidites
 * † Gleicheniidites circinidites
 * † Gleicheniidites senonicus
 * † Gleicheniidites sp.
 * † Glencopollis
 * † Glencopollis ornatus
 * † Globanomalina
 * † Globanomalina planocompressa
 * † Globicephala
 * † Globicephala macrorhynchus
 * † Glossotheriopsis – type locality for genus
 * † Glossotheriopsis pascuali – type locality for species
 * † Glossotherium
 * † Glossotherium emmersoni – type locality for species
 * † Glossotherium myloides
 * † Glossotherium robustum
 * † Glossotherium sp.
 * † Glycymeris
 * † Glycymeris camaronesia – or unidentified comparable form
 * † Glycymeris camaronesia
 * † Glycymeris cuevensis – or unidentified comparable form
 * † Glycymeris cuevensis
 * † Glycymeris feruglioi – or unidentified comparable form
 * † Glycymeris ibari – or unidentified comparable form
 * † Glycymeris ibari
 * † Glycymeris longioriformis – type locality for species
 * † Glycymeris magna – type locality for species
 * † Glycymeris magna
 * † Glycymeris pseudocuevensis
 * † Glycymeris sp.
 * † Glyphithyreus – tentative report
 * † Glyphithyreus wichmanni – type locality for species
 * † Glyphithyreus wichmanni
 * † Glyptatelus
 * † Glyptatelus fractus – type locality for species
 * † Glyptoactis
 * † Glyptoactis inaequalis
 * † Glyptodon
 * † Glyptodon clavipes
 * † Glyptodon munizi
 * † Glyptodon perforatus
 * † Glyptodon reticulatus – or unidentified comparable form
 * † Glyptodon reticulatus
 * † Glyptodon rudimentarius
 * † Glyptodon sp.
 * † Glyptodontidarum
 * † Glyptodontidarum sp.
 * † Gmelinmagas – tentative report
 * † Gmelinmagas
 * † Gmelinmagas plicata
 * † Gmelinmagas sp.
 * † Goeppertia
 * † Goeppertia ovalifolia
 * † Gomphechinus
 * † Gomphechinus sp.
 * † Gomphrenipollis
 * † Gomphrenipollis sp.
 * † Goniopteris
 * † Goniopteris patagoniana – type locality for species
 * † Gothanipollis
 * † Gothanipollis bassensis
 * † Graminidites
 * † Graminidites media
 * † Graminidites sp.
 * † Graminidites spp.
 * † Grammatodon
 * † Grammatodon sulcatinus
 * † Grampus
 * † Grampus griseus
 * † Granodiporites
 * † Granodiporites nebulosus
 * † Gregariella
 * † Gregariella amara – type locality for species
 * † Greniodon – type locality for genus
 * † Greniodon sylvaticus – type locality for species
 * † Griphotherion – type locality for genus
 * † Griphotherion peiranoi – type locality for species
 * † Groeberia – type locality for genus
 * † Groeberia
 * † Groeberia minoprioi – type locality for species
 * † Groeberia pattersoni – type locality for species
 * † Gruipeda
 * † Gruipeda dominguensis – type locality for species
 * † Gruipeda dominguensis
 * † Gryllites
 * † Gryllites vocalis – type locality for species
 * † Gryllus
 * † Gryllus vociferans – type locality for species
 * † Gryphaeostrea
 * † Gryphaeostrea callophyla
 * † Gryphaeostrea callophylla
 * † Grypolophodon – type locality for genus
 * † Grypolophodon
 * † Grypolophodon imperfectus – type locality for species
 * † Grypolophodon morenoi – type locality for species
 * † Grypolophodon tuberculosis – type locality for species
 * † Gryposuchus
 * † Gryposuchus neogaeus
 * † Gualta – type locality for genus
 * † Gualta cuyana – type locality for species
 * † Guggenheimia
 * † Guggenheimia crocheti
 * † Guilielmofloweria – type locality for genus
 * † Guilielmofloweria plicata – type locality for species
 * † Guilielmoscottia – type locality for genus
 * † Guilielmoscottia
 * † Guilielmoscottia plicifera – type locality for species
 * † Guilielmoscottia plicifera
 * † Guilielmoscottia sp.
 * † Guiomys
 * † Guiomys unica
 * † Gunnera
 * † Gunnera chilensis – or unidentified related form
 * † Gunnera magellanica – or unidentified related form
 * † Gunnera sp.
 * † Gymnogeophagus
 * † Gymnogeophagus eocenicus – type locality for species
 * † Gymnostoma
 * † Gymnostoma sp.
 * † Gymnostoma spp.
 * † Gyremys – or unidentified comparable form
 * † Gyremys sp.
 * † Gyriabrus
 * † Gyriabrus sp.
 * † Gyrocochlea
 * † Gyrocochlea sp.
 * † Gyroidinoides
 * † Gyroidinoides nitidus
 * † Hadriania – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Hadriania
 * † Hadriania jorgensis
 * † Haimesiastraea
 * † Haimesiastraea conferta
 * † Haloragacidites
 * † Haloragacidites harrisii
 * † Haloragacidites myriophylloides
 * † Haloragacidites trioratus
 * † Haloragracidites
 * † Haloragracidites trioratus
 * † Hapalops – or unidentified comparable form
 * † Hapalops
 * † Hapalops angustipalatus
 * † Hapalops elongatus
 * † Hapalops indifferens
 * † Hapalops longiceps
 * † Hapalops platycephalus
 * † Hapalops ponderosus – type locality for species
 * † Hapalops sp.
 * † Hapalops sp. 1informal
 * † Hapalops sp. 2informal
 * † Haplodontherium
 * † Haplodontherium limun
 * † Haplomastodon
 * † Haplomastodon sp.
 * † Haplostropha
 * † Haplostropha sp.
 * † Haruspex – tentative report
 * † Haruspex defectus
 * † Hedecardium – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Hedecardium
 * † Hedecardium patagonicum
 * † Hedecardium philippi
 * † Hedecardium sp. 1informal
 * † Hedecardium sp. 2informal
 * † Hedralophus – type locality for genus
 * † Hedralophus bicostatus – type locality for species
 * † Hegetotheriopsis
 * † Hegetotheriopsis sulcatus
 * † Hegetotherium
 * † Hegetotherium mirabile
 * † Hegetotherium sp.
 * † Helix
 * † Helix dentata
 * † Hemiauchenia – or unidentified comparable form
 * † Hemiauchenia
 * † Hemiauchenia paradoxa
 * † Hemiauchenia sp.
 * † Hemihegetotherium
 * † Hemihegetotherium lazai
 * † Hemihegetotherium robustum
 * † Hemihegetotherium torresi – or unidentified comparable form
 * † Hemipristis
 * † Hemipristis serra
 * † Henricofilholia
 * † Henricofilholia lustrata – type locality for species
 * † Henricofilholia vucetichia – type locality for species
 * † Henricosbornia – type locality for genus
 * † Henricosbornia – tentative report
 * † Henricosbornia
 * † Henricosbornia ampla – type locality for species
 * † Henricosbornia ampla
 * † Henricosbornia lophodonta – type locality for species
 * † Henricosbornia lophodonta – tentative report
 * † Henricosbornia lophodonta
 * † Henricosbornia minuta – type locality for species
 * † Henricosbornia sp.
 * † Henricosbornia waitehor – type locality for species
 * † Hercoglossa
 * † Hercoglossa rionegrensis
 * † Hercoglossa romeroi
 * † Hercoglossa walteri – or unidentified related form
 * † Herkosporites
 * † Herkosporites elliottii
 * † Herpailurus
 * † Herpailurus yaguaroundi – or unidentified comparable form
 * † Heteraulacysta
 * † Heteraulacysta campanula
 * † Heterodontus
 * † Heterodontus sp.
 * † Heteroglyphis – type locality for genus
 * † Heteroglyphis dewoletzky – type locality for species
 * † Heterolophodon – type locality for genus
 * † Heterolophodon ampliatus – type locality for species
 * † Heteroterma
 * † Heteroterma elegans
 * † Heteroterma sp. Ainformal
 * † Heteroterma tumida – or unidentified comparable form
 * † Hexacorbula
 * † Hexacorbula caduca – type locality for species
 * † Hexanchus
 * † Hexanchus griseus
 * † Hiatella
 * † Hiatella arctica
 * † Hiatella solida
 * † Hippidion
 * † Hippidion chapalmalensis
 * † Hippidion devillei
 * † Hippidion principale
 * † Hippidion saldiasi
 * † Hippidion sp.
 * † Hipponix
 * † Hipponix costata
 * † Hipponix flechensis
 * † Hipponix oligocostata
 * † Hoffmannia
 * † Hoffmannia protogaea
 * † Hoffmannia protogea
 * † Holochilus
 * † Holochilus brasiliensis
 * † Holozaedyus
 * † Holozaedyus laevisculptus
 * † Homalodontotherium
 * † Homalodontotherium sp.
 * † Homalodotherium
 * † Homalodotherium cunninghami
 * † Homalostylops
 * † Homalostylops interlissus – type locality for species
 * † Homalostylops parvus – type locality for species
 * † Homalostylops parvus
 * † Homalostylops sp.
 * † Homarus
 * † Homarus meridionalis
 * † Homunculus – type locality for genus
 * † Homunculus
 * † Homunculus patagonicus – type locality for species
 * † Homunculus patagonicus
 * † Homunculus sp.
 * † Hondonadia
 * † Hondonadia fierroensis – or unidentified comparable form
 * † Hondonadia parca – type locality for species
 * † Hondonadia praecipitia – type locality for species
 * † Hondonadia pumila – type locality for species
 * † Hondonadia pumila – or unidentified comparable form
 * † Hondonadia sp.
 * † Hoploparia
 * † Hoploparia arbei – or unidentified comparable form
 * † Hoplophorus
 * † Hoplophorus sp.
 * † Hoplophorus verus
 * † Huncoaeshna – type locality for genus
 * † Huncoaeshna corrugata – type locality for species
 * † Hydrangea – tentative report
 * † Hydrangea incerta – type locality for species
 * † Hydrangea incerta
 * † Hydrangeiphyllum
 * † Hydrangeiphyllum affine
 * † Hydraspis – tentative report
 * † Hydraspis arenarius – type locality for species
 * † Hydrochoeropsis
 * † Hydrochoeropsis dasseni
 * † Hydrochoeropsis fontanai
 * † Hydrochoerus – type locality for genus
 * † Hydrochoerus
 * † Hydrochoerus ballesterensis – type locality for species
 * † Hydrochoerus sp.
 * † Hydromedusa
 * † Hydromedusa casamayorensis – or unidentified comparable form
 * † Hydromedusa tectifera
 * † Hydrurga
 * † Hydrurga leptonyx
 * † Hypechinus
 * † Hypechinus patagonensis
 * † Hyperdidelphys
 * † Hyperdidelphys inexpectata
 * † Hyperdidelphys pattersoni
 * † Hyperleptus – or unidentified comparable form
 * † Hyperleptus
 * † Hyperleptus sp.
 * † Hyperoodon
 * † Hyperoodon planifrons
 * † Hypocixius – type locality for genus
 * † Hypocixius oblitescens – type locality for species
 * † Hypsosteiromys
 * † Hypsosteiromys axiculus – type locality for species
 * † Hypsosteiromys nectus – type locality for species
 * † Hypsosteiromys sp.
 * † Hystichokolpoma
 * † Hystichokolpoma sp.
 * † Icica
 * † Icica pichileufuana – type locality for species
 * † Icica tertiaria – type locality for species
 * † Ideodelphys – type locality for genus
 * † Ideodelphys
 * † Ideodelphys microscopicus – type locality for species
 * † Ideodelphys microscopicus
 * † Idiorophus
 * † Idiorophus patagonicus – type locality for species
 * † Iheringiella
 * † Iheringiella patagonensis
 * † Iheringiella sp.
 * † Iheringinucula
 * † Iheringinucula crassirugata
 * † Iheringinucula sp.
 * † Iheringinucula tricesima
 * † Iheringithyris
 * † Iheringithyris ameghinoi
 * † Ilchunaia – type locality for genus
 * † Ilchunaia parva – type locality for species
 * † Ilexpollenites
 * † Ilexpollenites clifdenensis
 * † Ilynassa
 * † Ilynassa sp.
 * † Inacayalestes – type locality for genus
 * † Inacayalestes aikunhuapi – type locality for species
 * † Inapertisporites
 * † Inapertisporites sp. Ainformal
 * † Inapertisporites spp.
 * † Inaperturopollenites
 * † Inaperturopollenites hiatus
 * † Inaperturopollenites sp.
 * † Inaperturopollenites sp. Einformal
 * † Incamys
 * † Incamys bolivianus
 * † Incamys menniorum – type locality for species
 * † Indalecia – type locality for genus
 * † Indalecia grandensis – type locality for species
 * † Inga
 * † Inga patagonica – type locality for species
 * † Integritetradites
 * † Integritetradites sp.
 * † Interatherium
 * † Interatherium excavatum
 * † Interatherium extensum
 * † Interatherium robustum
 * † Interatherium robustus
 * † Interatherium sp.
 * † Interhippus – type locality for genus
 * † Interhippus deflexus – type locality for species
 * † Interlobulites
 * † Interlobulites sp.
 * † Interlobulites variabilis – or unidentified comparable form
 * † Interlobulites variabilis
 * † Intratriporopollenites
 * † Intratriporopollenites sp.
 * † Ischyosporites
 * † Ischyosporites sp.
 * † Ischyrorhynchus – type locality for genus
 * † Ischyrorhynchus vanbenedeni – type locality for species
 * † Isechinus
 * † Isechinus praecursor
 * † Iselica
 * † Iselica dessantii
 * † Isoetes
 * † Isoetes savatieri – or unidentified related form
 * † Isognomon
 * † Isognomon quadrisulcata
 * † Isognomon sp.
 * † Isognomon valvanoi
 * † Isolophodon
 * † Isolophodon aplanatus – type locality for species
 * † Isostylomys
 * † Isostylomys sp.
 * † Isostylops
 * † Isostylops fretus – type locality for species
 * † Isotemnus – type locality for genus
 * † Isotemnus – tentative report
 * † Isotemnus
 * † Isotemnus colhuehuapiensis – type locality for species
 * † Isotemnus consummatus – type locality for species
 * † Isotemnus ctalego – type locality for species
 * † Isotemnus haugi – type locality for species
 * † Isotemnus latidens – type locality for species
 * † Isotemnus latidens
 * † Isotemnus primitivus – type locality for species
 * † Isotemnus primitivus – tentative report
 * † Isotemnus primitivus – or unidentified comparable form
 * † Isotemnus primitivus
 * † Isotemnus sp. – type locality for species
 * † Isotemnus sp.
 * † Isotypotherium – type locality for genus
 * † Isotypotherium annulatum – type locality for species
 * † Itaboraidelphys – or unidentified comparable form
 * † Itaboraidelphys sp.
 * † Itaboraitherium
 * † Itaboraitherium sp.
 * † Jagolucina
 * † Jagolucina psephenata
 * † Jorgechlamys
 * † Jorgechlamys centralis
 * † Jorgechlamys juliana
 * † Josepholeidya
 * † Josepholeidya adunca – type locality for species
 * † Josepholeidya adunca
 * † Josepholeidya deculca – type locality for species
 * † Jujusia – type locality for genus
 * † Jujusia maizgorda – type locality for species
 * † Jussitriporites
 * † Jussitriporites menendezii – type locality for species
 * † Kawas – type locality for genus
 * † Kawas benegasorum – type locality for species
 * † Kawasphenodon
 * † Kawasphenodon peligrensis – type locality for species
 * † Kelenken – type locality for genus
 * † Kelenken guillermoi – type locality for species
 * † Kentriodon – or unidentified comparable form
 * † Kentriodon sp.
 * † Kibenikhoria – type locality for genus
 * † Kibenikhoria
 * † Kibenikhoria get – type locality for species
 * † Kibenikhoria sp.
 * † Klohnia
 * † Klohnia major – type locality for species
 * † Klohnia major – or unidentified comparable form
 * † Klukisporites
 * † Klukisporites sp.
 * † Klukisporites variegatus
 * † Knightia
 * † Knightia andreae
 * † Kraglievichia
 * † Kraglievichia paranense
 * † Kraglievichia sp.
 * † Kramadolops
 * † Kramadolops fissuratus – type locality for species
 * † Kramadolops maximus – type locality for species
 * † Kramadolops mayoi – type locality for species
 * † Kramadolops mayoi
 * † Labrodon
 * † Labrodon sp.
 * † Lacrimaesporonites
 * † Lacrimaesporonites spp.
 * † Lacrimasporonites
 * † Lacrimasporonites sp.
 * † Lactoris
 * † Lactoris sp.
 * † Laevicardium
 * † Laevicardium sp.
 * † Laevidentalium
 * † Laevidentalium feruglioi
 * † Laevigatosporites
 * † Laevigatosporites ovatus
 * † Laevigatosporites sp. Ainformal
 * † Laevilitorina
 * † Laevilitorina caliginosa
 * † Lafkenia – type locality for genus
 * † Lafkenia
 * † Lafkenia schmidti – type locality for species
 * † Lafkenia sulcifera – type locality for species
 * † Lagopterus – type locality for genus
 * † Lagopterus minutus – type locality for species
 * † Lagostomus
 * † Lagostomus euplasius
 * † Lagostomus incises
 * † Lagostomus maximus
 * † Lagostomus pretrichodactyla – or unidentified comparable form
 * † Lagostomus sp.
 * † Lahilla
 * † Lahilla patagonica
 * † Lahillia
 * † Lahillia angulata – or unidentified comparable form
 * † Lahillia angulata
 * † Lahillia gigantea
 * † Lahillia patagonica
 * † Lama
 * † Lama glama
 * † Lama gracilis
 * † Lama guanicoe
 * † Lama sp.
 * † Lambdaconus – type locality for genus
 * † Lambdaconus
 * † Lambdaconus elegans – type locality for species
 * † Lambdaconus suinus – type locality for species
 * † Lammuastacus – type locality for genus
 * † Lammuastacus
 * † Lammuastacus longirostris – type locality for species
 * † Lammuastacus longirostris
 * † Lamna
 * † Lamna amplibasidens
 * † Lamna serridens
 * † Lamna totuserrata
 * † Lamna unicuspidens
 * † Landolphia
 * † Landolphia paraparaensis – type locality for species
 * † Larus
 * † Larus spp.
 * † Lasaea
 * † Lasaea sp.
 * † Laternula
 * † Laternula sp.
 * † Latibasalia – type locality for genus
 * † Latibasalia
 * † Latibasalia elongata – type locality for species
 * † Latibasalia quispeae – type locality for species
 * † Laurelia
 * † Laurelia amarillana – type locality for species
 * † Laurophyllum
 * † Laurophyllum chalianum – type locality for species
 * † Laurophyllum chubutensis – type locality for species
 * † Laurophyllum chubutensis
 * † Laurophyllum piatnitzkyi – type locality for species
 * † Laurophyllum piatnitzkyi
 * † Lebia
 * † Lebia harrelli – type locality for species
 * † Ledina
 * † Ledina lepida
 * † Leguminosites
 * † Leguminosites calliandraformis – type locality for species
 * † Leguminosites patagonicus – type locality for species
 * † Leguminosites sp.
 * † Leiosaurus
 * † Leiosaurus marellii – type locality for species
 * † Leiosphaeridia
 * † Leiosphaeridia hyalina
 * † Leiosphaeridia sp.
 * † Leiotriletes
 * † Leiotriletes regularis – or unidentified comparable form
 * † Leiotriletes regularis
 * † Leiotriletes sp.
 * † Lejeunecysta
 * † Lejeunecysta communis
 * † Lejeunecysta globosa
 * † Lejeunecysta pulchra
 * † Lejeunecysta spp.
 * † Lemudeus – type locality for genus
 * † Lemudeus angustidens – type locality for species
 * † Lentinia
 * † Lentinia sp.
 * † Leontinia – tentative report
 * † Leontinia
 * † Leontinia freqens
 * † Leontinia gaudryi – tentative report
 * † Leontinia gaudryi – or unidentified comparable form
 * † Leontinia gaudryi
 * † Leontinia sp.
 * † Leopardus
 * † Leopardus vorohuensis – type locality for species
 * † Lepidobatrachus
 * † Lepidobatrachus laevis
 * † Lepidosiren
 * † Lepidosiren paradoxa
 * † Leptodactylus
 * † Leptodactylus sp.
 * † Leptolepidites
 * † Leptolepidites densus – type locality for species
 * † Leptolepidites major
 * † Leptolepidites sp.
 * † Leptolobium
 * † Leptolobium prenitens – type locality for species
 * † Leptoptilos
 * † Leptoptilos patagonicus – type locality for species
 * † Leptorramphus – type locality for genus
 * † Leptorramphus entrerrianus – type locality for species
 * † Lepus
 * † Lepus europaeus
 * † Lestodelphys
 * † Lestodelphys halli – or unidentified comparable form
 * † Lestodelphys halli
 * † Lestodelphys juga – or unidentified comparable form
 * † Lestodelphys sp.
 * † Lestodon
 * † Lestodon armatus
 * † Lestodon castellanosi – tentative report
 * † Lestodon gaudryi
 * † Lestodon sp.
 * † Lestodon trigonidens
 * † Leucokephalos – type locality for genus
 * † Leucokephalos zeffiae – type locality for species
 * † Leukoma – tentative report
 * † Leukoma
 * † Leukoma argentina
 * † Leukoma darwini
 * † Leukoma meridionalis
 * † Leukoma sp.
 * † Lewalanipollis
 * † Lewalanipollis senectus
 * † Lewalanipollis sp.
 * † Liarthrus – type locality for genus
 * † Liarthrus
 * † Liarthrus copei – type locality for species
 * † Liarthrus copei
 * † Libocedrus
 * † Libocedrus prechilensis – type locality for species
 * † Licaphrium
 * † Licaphrium floweri
 * † Licaphrium mesopotamiense
 * † Licaphrops
 * † Licaphrops festinus
 * † Liliacidites
 * † Liliacidites regularis – type locality for species
 * † Liliacidites regularis
 * † Liliacidites sp. 1informal
 * † Liliacidites sp. 2informal
 * † Liliacidites spp.
 * † Liliacidites variegatus
 * † Liliacidites vermireticulatus
 * † Lilloiconcha
 * † Lilloiconcha sp.
 * † Lima
 * † Lima sp.
 * † Limaria
 * † Limaria patagonia
 * † Limaria patagonica
 * † Limatula
 * † Limatula cossmanni
 * † Limatula pisum
 * † Limatula pygmaea
 * † Limopsis
 * † Limopsis insolita – or unidentified comparable form
 * † Limopsis insolita
 * † Limopsis patagoniensis
 * † Limopsis sp.
 * † Lingulodinium
 * † Lingulodinium hemicystum
 * † Linthia
 * † Linthia gaudryii – type locality for species
 * † Liotia
 * † Liotia terrugii
 * † Liptornis
 * † Liptornis hesternus
 * † Liquidambarpollenites
 * † Liquidambarpollenites brandonensis – or unidentified comparable form
 * † Liquidambarpollenites brandonensis
 * † Lissarca
 * † Lissarca miliaris
 * † Lissodelphis
 * † Lissodelphis peronii
 * † Lithophaga
 * † Lithophaga exilis – or unidentified comparable form
 * † Lithophaga ostricola
 * † Lithophaga patagonicus
 * † Litodontomys – type locality for genus
 * † Litodontomys
 * † Litodontomys chubutensis – type locality for species
 * † Litodontomys chubutensis
 * † Littoraria
 * † Littoraria nebulosa
 * † Littoridina
 * † Littoridina sp.
 * † Littorina
 * † Littorina gigantea
 * † Littorina piramidesia
 * † Littorina saxatilis
 * † Littorina ziczac – or unidentified related form
 * † Llankibatrachus – type locality for genus
 * † Llankibatrachus
 * † Llankibatrachus truebae – type locality for species
 * † Llankibatrachus truebae
 * † Llitun – type locality for genus
 * † Llitun notuca – type locality for species
 * † Lobonotus
 * † Lobonotus lobulata – type locality for species
 * † Lobonotus lobulata
 * † Lomaphorelus – type locality for genus
 * † Lomaphorelus depstus – type locality for species
 * † Lomaphorops
 * † Lomaphorops corallinus
 * † Lomatia
 * † Lomatia hirsuta
 * † Lomatia occidentalis
 * † Lomatia patagonica
 * † Lomatia preferruginea – type locality for species
 * † Lomatia preferruginea
 * † Lomatites
 * † Lomatites occidentalis – type locality for species
 * † Loncolicu – type locality for genus
 * † Loncolicu tretos – type locality for species
 * † Longapertites
 * † Longapertites andreisii – type locality for species
 * † Longapertites andreisii
 * † Longapertites patagonicus – type locality for species
 * † Longapertites patagonicus
 * † Longapertites sp.
 * † Longapertites vaneendenburgi – or unidentified related form
 * † Longapertites vaneendenburgi – or unidentified comparable form
 * † Lontra
 * † Lontra longicaudis
 * † Lopha
 * † Lopha radiata
 * † Lophiodonticulus – type locality for genus
 * † Lophiodonticulus
 * † Lophiodonticulus patagonicus – type locality for species
 * † Lophiodonticulus retroversus – type locality for species
 * † Lophosoria
 * † Lophosoria sp.
 * † Lorosuchus – type locality for genus
 * † Lorosuchus nodosus – type locality for species
 * † Loxornis
 * † Loxornis clivus
 * † Luantus
 * † Luantus initialis
 * † Luantus minor – type locality for species
 * † Luantus propheticus – type locality for species
 * † Luantus propheticus
 * † Luantus sp. nov. – tentative reportinformal
 * † Luantus toldensis – type locality for species
 * † Luantus toldensis
 * † Lucapinella
 * † Lucapinella eurytreta
 * † Lucina – tentative report
 * † Lucina – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Lucina
 * † Lucina crucialis
 * † Lucina dalli
 * † Lucina neglecta – or unidentified comparable form
 * † Lucina neglecta
 * † Lucina ortmanni
 * † Lucina sp.
 * † Lucinisca
 * † Lucinisca sp.
 * † Lucinoma
 * † Lucinoma promaucana
 * † Lucinopsis
 * † Lucinopsis concentricum
 * † Lumbrerasaurus – type locality for genus
 * † Lumbrerasaurus scagliai – type locality for species
 * † Lumbreratherium – type locality for genus
 * † Lumbreratherium oblitum – type locality for species
 * † Lunatia
 * † Lunatia constricta – or unidentified comparable form
 * † Lunatia pueyrredonensis
 * † Lundomys
 * † Lundomys sp.
 * † Lutraria
 * † Lutraria sp.
 * † Lutraria vetula – or unidentified comparable form
 * † Lutreolina
 * † Lutreolina crassicaudata – or unidentified comparable form
 * † Lutreolina sp.
 * † Lycopodium
 * † Lycopodium sp.
 * † Lycopodiumsporites
 * † Lycopodiumsporites austroclavatidites
 * † Lycopodiumsporites eminulus – or unidentified comparable form
 * † Lycopodiumsporites eminulus
 * † Lycopodiumsporites spp.
 * † Lycopsis – type locality for genus
 * † Lycopsis
 * † Lycopsis torresi – type locality for species
 * † Lycopsis torresi
 * † Lycopsis viverensis – type locality for species
 * † Lygistepollenites
 * † Lygistepollenites florinii
 * † Lymingtonia
 * † Lymingtonia sp.
 * † Lyncodon
 * † Lyncodon patagonicus
 * † Lyria – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Lyria dalli
 * † Macanopsis
 * † Macanopsis sp.
 * † Macaranga – or unidentified comparable form
 * † Macaranga TY046informal
 * † Machlydotherium – type locality for genus
 * † Machlydotherium – tentative report
 * † Machlydotherium
 * † Machlydotherium asperum – type locality for species
 * † Machlydotherium asperum
 * † Machlydotherium ater – type locality for species
 * † Machlydotherium ater
 * † Machlydotherium intortum – type locality for species
 * † Machlydotherium sparsum – type locality for species
 * † Macoma
 * † Macoma perplana
 * † Macrahinga
 * † Macrahinga paranensis
 * † Macrauchenia – tentative report
 * † Macrauchenia
 * † Macrauchenia latidens
 * † Macrauchenia patagonica
 * † Macrauchenia sp.
 * † Macraucheniopsis
 * † Macraucheniopsis ensenadensis
 * † Macrauchenopsis – tentative report
 * † Macrauchenopsis ensenadensis
 * † Macrocavia
 * † Macrocavia simpsoni
 * † Macrochorobates
 * † Macrochorobates chapadmalensis
 * † Macrochorobates scalabrinii
 * † Macroeuphractus
 * † Macroeuphractus australis
 * † Macroeuphractus morenoi – or unidentified comparable form
 * † Macroeuphractus morenoi
 * † Macroeuphractus retusus
 * † Macroeuphractus scalabrini
 * † Mactra – tentative report
 * † Mactra
 * † Mactra darwini
 * † Mactra garreti
 * † Mactra indistincta
 * † Mactra isabelleana
 * † Mactra patagonica – or unidentified comparable form
 * † Mactra patagonica
 * † Mactra steinmanni – or unidentified related form
 * † Mactromeris
 * † Mactromeris longa – type locality for species
 * † Maddenia – type locality for genus
 * † Maddenia lapidaria – type locality for species
 * † Madrepora
 * † Madrepora sp.
 * † Madrynornis – type locality for genus
 * † Madrynornis mirandus – type locality for species
 * † Madtsoia – type locality for genus
 * † Madtsoia – tentative report
 * † Madtsoia
 * † Madtsoia bai – type locality for species
 * † Madtsoia bai – or unidentified comparable form
 * † Madtsoia sp.
 * † Magellania – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Magellania
 * † Magellania lenticularis
 * † Magellania sp.
 * † Magnaperiporites
 * † Magnaperiporites sp.
 * † Magnatica
 * † Magnatica hansi
 * † Malletia
 * † Malletia rudis
 * † Maluacipolloides
 * † Maluacipolloides comodonoensis
 * † Malvacarpis – type locality for genus
 * † Malvacarpis tertiarius – type locality for species
 * † Malvacarpus
 * † Malvacarpus guinazui – type locality for species
 * † Malvacearumpollis
 * † Malvacearumpollis mannanensis
 * † Malvaciphyllum
 * † Malvaciphyllum quenquiadensis
 * † Malvacipollis
 * † Malvacipollis argenlina
 * † Malvacipollis argentina – type locality for species
 * † Malvacipollis argentina
 * † Malvacipollis comodoroensis
 * † Malvacipollis sp. 1informal
 * † Malvacipollis sp. 2informal
 * † Malvacipollis sp. 3informal
 * † Malvacipollis subtilis
 * † Malvacipolloides
 * † Malvacipolloides comodoroensis
 * † Margarella
 * † Margarella violacea
 * † Margarita
 * † Margarita punctulata
 * † Margarites
 * † Margarites striatus
 * † Marginella – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Marginella deuterolivella
 * † Margocolporites
 * † Margocolporites sp.
 * † Margocolporites sp.1informal
 * † Margocolporites tenuireticulatus
 * † Margocolporites vanwijhei
 * † Marmosa
 * † Marmosa contrerasi – type locality for species
 * † Marmosa sp.
 * † Marmosopsis
 * † Marmosopsis sp.
 * † Martesia
 * † Martesia cazadoriana
 * † Martinmiguelia – type locality for genus
 * † Martinmiguelia fernandezi – type locality for species
 * † Maruchito – type locality for genus
 * † Maruchito trilofodonte – type locality for species
 * † Mascagnia
 * † Mascagnia sepiumoides – type locality for species
 * † Matayba
 * † Matayba marginatifolia – type locality for species
 * † Mathilda
 * † Mathilda malvinarum – or unidentified related form
 * † Matonisporites
 * † Matonisporites crassiangulatus
 * † Matonisporites equiexinus
 * † Matonisporites ornamentalis
 * † Matonisporites sp.
 * † Maxschlosseria
 * † Maxschlosseria anatoma – type locality for species
 * † Maxschlosseria consumata – type locality for species
 * † Maxschlosseria consumata
 * † Maxschlosseria expansa – type locality for species
 * † Maxschlosseria minima – type locality for species
 * † Maxschlosseria minima
 * † Maxschlosseria minuta – type locality for species
 * † Maxschlosseria minuta
 * † Maxschlosseria praeterita – type locality for species
 * † Maxschlosseria praeterita
 * † Maxschlosseria rusticula – type locality for species
 * † Maxschlosseria rusticula
 * † Maxschlosseria septa – type locality for species
 * † Maytenus – or unidentified related form
 * † Maytenus
 * † Maytenus ellipticus – type locality for species
 * † Maytenus latifolioides – type locality for species
 * † Maytenus latifolioides
 * † Maytenus spp.
 * † Mazzonicebus – type locality for genus
 * † Mazzonicebus almendrae – type locality for species
 * † Mazzoniphractus
 * † Mazzoniphractus ingens
 * † Medistylus – type locality for genus
 * † Medistylus
 * † Medistylus dorsatus – type locality for species
 * † Medistylus dorsatus
 * † Megabradys – type locality for genus
 * † Megabradys
 * † Megabradys darwini – type locality for species
 * † Megabradys darwini
 * † Megalonychops
 * † Megalonychops primigenius
 * † Megapaloelodus
 * † Megapaloelodus sp.
 * † Megapiranha – type locality for genus
 * † Megapiranha
 * † Megapiranha paranensis – type locality for species
 * † Megapiranha paranensis
 * † Megascyliorhinus
 * † Megascyliorhinus trelewensis – type locality for species
 * † Megascyliorhinus trelewensis
 * † Megastus
 * † Megastus sp.
 * † Megatebennus
 * † Megatebennus pardelensis
 * † Megathericulus
 * † Megathericulus patagonicus
 * † Megatherium
 * † Megatherium americanum – or unidentified comparable form
 * † Megatherium americanum
 * † Megatherium sp.
 * † Megatherium tarijensis – or unidentified comparable form
 * † Megatherium uquiensis – tentative report
 * † Melongena
 * † Melongena distans – or unidentified comparable form
 * † Melongena ventricosa – tentative report
 * † Melosira
 * † Melosira sp.
 * † Mendozahippus – type locality for genus
 * † Mendozahippus – or unidentified comparable form
 * † Mendozahippus
 * † Mendozahippus fierensis – type locality for species
 * † Mendozahippus fierensis
 * † Menucoa
 * † Menucoa cazaui
 * † Meretrix
 * † Meretrix antarctica
 * † Meretrix australis
 * † Meretrix chalcedonica
 * † Meretrix rothi
 * † Mesembriornis
 * † Mesembriornis milneedwardsi
 * † Mesembrioxylon
 * † Mesembrioxylon mazzonii – type locality for species
 * † Mesembrioxylon mazzonii
 * † Mesotherium
 * † Mesotherium sp.
 * † Mespilodaphne
 * † Mespilodaphne longifolia
 * † Metacarcinus – tentative report
 * † Metacarcinus sp.
 * † Metaxytherium
 * † Metaxytherium sp.
 * † Meteutatus
 * † Meteutatus attonsus – type locality for species
 * † Meteutatus lagenaformis – or unidentified related form
 * † Meteutatus lagenaformis
 * † Meteutatus percarinatus – type locality for species
 * † Meteutatus percarinatus
 * † Meteutatus sp.
 * † Metheutria
 * † Metheutria martensi
 * † Metopotoxus
 * † Metopotoxus laevatus
 * † Microbiotherium – type locality for genus
 * † Microbiotherium
 * † Microbiotherium acicula – type locality for species
 * † Microbiotherium acicula
 * † Microbiotherium gallegosense – type locality for species
 * † Microbiotherium gallegosense – or unidentified comparable form
 * † Microbiotherium patagonicum – type locality for species
 * † Microbiotherium patagonicum
 * † Microbiotherium praecursor – type locality for species
 * † Microbiotherium sp.
 * † Microbiotherium tehuelchum – type locality for species
 * † Microbiotherium tehuelchum
 * † Microcachrydites
 * † Microcachrydites antarcticus
 * † Microcachryidites
 * † Microcachryidites antarcticus
 * † Microcardiodon – type locality for genus
 * † Microcardiodon – or unidentified comparable form
 * † Microcardiodon williensis – type locality for species
 * † Microcardiodon williensis
 * † Microcavia
 * † Microcavia australis
 * † Microcavia robusta
 * † Microcavia sp.
 * † Microdiscula – tentative report
 * † Microdiscula sp.
 * † Microfoveolatosporis
 * † Microfoveolatosporis sp.
 * † Microfoveolatosporites
 * † Microfoveolatosporites sp.
 * † Micropsis
 * † Micropsis desori
 * † Microthallites
 * † Microthallites sp.
 * † Microtragulus
 * † Microtragulus catamarcensis
 * † Microtragulus rusconii – type locality for species
 * † Microtragulus rusconii
 * † Microtragulus sp.
 * † Milfordia
 * † Milfordia argentina
 * † Milfordia sp.
 * † Miomelon – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Miomelon
 * † Miomelon becki
 * † Miomelon gracilis – or unidentified comparable form
 * † Miomelon gracilis
 * † Miomelon gracilor
 * † Miomelon orbignyana
 * † Miomelon petersoni
 * † Mirandatherium
 * † Mirandatherium sp.
 * † Mirounga
 * † Mirounga leonina
 * † Misodendrum
 * † Misodendrum spp.
 * † Mixtipecten – or unidentified related form
 * † Mixtipecten sp.
 * † Modiolarca
 * † Modiolarca prisca
 * † Modiolus
 * † Modiolus ameghinoi
 * † Modiolus sp.
 * † Modiolus sp. Ainformal
 * † Modiolus sp. Binformal
 * † Modiolus thomsoni – or unidentified comparable form
 * † Modiomytilus
 * † Modiomytilus pseudochorus
 * † Molanna – tentative report
 * † Molanna derosa
 * † Momipites
 * † Momipites dilatus
 * † Momisia
 * † Momisia australia – type locality for species
 * † Monodelphopsis
 * † Monodelphopsis sp.
 * † Monogemmites
 * † Monogemmites gemmatus
 * † Monolites
 * † Monolites alveolatus
 * † Monophoraster
 * † Monophoraster darwini
 * † Monosulcites
 * † Monosulcites minutiscabratus
 * † Monosulcites sp.
 * † Monotrematum – type locality for genus
 * † Monotrematum sudamericanum – type locality for species
 * † Morenelaphus – or unidentified comparable form
 * † Morenelaphus
 * † Morenelaphus azpeitianus
 * † Morenelaphus lujanensis
 * † Morenelaphus sp.
 * † Morenia
 * † Morenia sp.
 * † Morenocetus – type locality for genus
 * † Morenocetus parvus – type locality for species
 * † Mormopterus
 * † Mormopterus barrancae – type locality for species
 * † Mougeotia
 * † Mougeotia laetevirens – or unidentified related form
 * † Mougeotia laetivirens – or unidentified related form
 * † Mougeotia sp. Tipo Ainformal
 * † Mourasuchus – type locality for genus
 * † Mourasuchus arendsi – type locality for species
 * † Mtchedlishvilia
 * † Mtchedlishvilia saltenia
 * † Mulinia
 * † Mulinia edulis
 * † Multicellaesporites
 * † Multicellaesporites spp.
 * † Munida
 * † Munida casadioi
 * † Munida deangelii
 * † Munida sp.
 * † Munizia
 * † Munizia paranensis
 * † Muricingulisporis
 * † Muricingulisporis chenquensis
 * † Muricingulisporis chequensis
 * † Muricingulisporis verrucosus
 * † Mutisiapollis
 * † Mutisiapollis patersonii
 * † Mutisiapollis sp.
 * † Mutisiapollis viteauensis
 * † Mya
 * † Mya nucleoides
 * † Mycrocachryidites
 * † Mycrocachryidites antarcticus
 * † Myliobatis
 * † Myliobatis americanus
 * † Mylodon
 * † Mylodon listai
 * † Mylodon sp.
 * † Myocastor
 * † Myocastor coipus
 * † Myocastor columnaris
 * † Myocastor coypus
 * † Myocastor priscus
 * † Myocastor sp.
 * † Myochlamys
 * † Myochlamys foyela
 * † Myrceugenia
 * † Myrceugenia chubutense
 * † Myrceugenia sp.
 * † Myrceugenia tertiaria – type locality for species
 * † Myrcia
 * † Myrcia chubutensis
 * † Myrcia deltiodea
 * † Myrcia nitens
 * † Myrcia obovata – type locality for species
 * † Myrcia reticulato-venosa
 * † Myrciophyllum
 * † Myrciophyllum sp. 1informal
 * † Myrciophyllum sp. 2informal
 * † Myrciophyllum tucumanensis
 * † Myrica – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Myrica
 * † Myrica chubutensis – type locality for species
 * † Myrica mira – type locality for species
 * † Myrica mira
 * † Myrica premira – type locality for species
 * † Myrica premira
 * † Myriophyllum
 * † Myriophyllum sp.
 * † Myristica – tentative report
 * † Myristica fossilis
 * † Myrtaceidites
 * † Myrtaceidites mesonesus
 * † Myrtaceidites sp.
 * † Myrtaceidites sp. Ainformal
 * † Myrtaceidites sp. Binformal
 * † Myrtaceidites verrucosus – or unidentified related form
 * † Myrtaceidites verrucosus
 * † Myrtiphyllum
 * † Myrtiphyllum bagualense
 * † Myrtipites
 * † Myrtipites sp.
 * † Mysella
 * † Mysella miniuscula – or unidentified related form
 * † Mytilus
 * † Mytilus edulis
 * † Mytilus sp.
 * † Mytilus trigonus
 * † Nacella – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Nacella – or unidentified comparable form
 * † Nacella
 * † Nacella deaurata – or unidentified related form
 * † Nacella deaurata
 * † Nacella delicatissima
 * † Nacella magellanica
 * † Nacella ovata
 * † Nacella sp.
 * † Naiadochelys
 * † Naiadochelys patagonica – type locality for species
 * † Naiadochelys patagonica – or unidentified comparable form
 * † Nassa – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Nassa fueguina
 * † Natica
 * † Natica borelloi
 * † Natica limbata
 * † Natica pastorei
 * † Natica sp.
 * † Necrobia
 * † Necrobia rufipes
 * † Necrolestes
 * † Necrolestes mirabilis – type locality for species
 * † Necrolestes patagonensis
 * † Necromys
 * † Necromys bonapartei
 * † Necromys lactens – or unidentified comparable form
 * † Necrosuchus – type locality for genus
 * † Necrosuchus ionensis – type locality for species
 * † Nectandra
 * † Nectandra patagonica – type locality for species
 * † Nectandra patagonica
 * † Nectandra prolicifa – type locality for species
 * † Nectandra saltensis
 * † Neilo
 * † Neilo biradiata
 * † Neilo doellojuradoi – type locality for species
 * † Neilo ornata – or unidentified comparable form
 * † Neilo ornata
 * † Neilo ortmanni
 * † Neilo sp.
 * † Nematherium
 * † Nematherium sp.
 * † Nemathosphaeropsis
 * † Nemathosphaeropsis spp.
 * † Nematosphaeropsis
 * † Nematosphaeropsis rigida
 * † Nemolestes – type locality for genus
 * † Nemolestes – tentative report
 * † Nemolestes sp.
 * † Nemolestes spalacotherinus – type locality for species
 * † Neobrachytherium
 * † Neobrachytherium ameghinoi
 * † Neobrachytherium sp.
 * † Neocavia
 * † Neocavia depressidens – type locality for species
 * † Neocavia sp.
 * † Neochoerus
 * † Neochoerus sulcidens
 * † Neochoerus tarijensis – or unidentified comparable form
 * † Neoepiblema
 * † Neoepiblema ambrosettianus
 * † Neoepiblema horridula
 * † Neoepiblema sp.
 * † Neoguraleus
 * † Neoguraleus pilsbry
 * † Neoguraleus pilsbryi
 * † Neohapalops
 * † Neohapalops rothi
 * † Neoimbricaria
 * † Neoimbricaria patagonica
 * † Neoinoceramus
 * † Neoinoceramus ameghinoi
 * † Neolepton
 * † Neolepton sp.
 * † Neophanomys
 * † Neophanomys biplicatus
 * † Neophanomys sp.
 * † Neoprocoela – type locality for genus
 * † Neoprocoela edentatus – type locality for species
 * † Neoraistrichia
 * † Neoraistrichia sp.
 * † Neoraistrickia
 * † Neoraistrickia sp.
 * † Neoreomys
 * † Neoreomys australis
 * † Neoreomys pinturensis – type locality for species
 * † Neoreomys pinturensis
 * † Neoreomys sp.
 * † Neosclerocalyptus
 * † Neosclerocalyptus gouldi – type locality for species
 * † Neosclerocalyptus heusseri – or unidentified comparable form
 * † Neosclerocalyptus paskoensis – or unidentified comparable form
 * † Neosclerocalyptus paskoensis
 * † Neosclerocalyptus sp.
 * † Neosteiromys
 * † Neosteiromys sp.
 * † Neosteiromys tordillense – type locality for species
 * † Neotamandua – tentative report
 * † Neotamandua
 * † Neotamandua australis – type locality for species
 * † Neotamandua conspicua – type locality for species
 * † Neothoracophorus
 * † Neothoracophorus depressus
 * † Neothoracophorus elevatus
 * † Neotomys
 * † Neotomys ebriosus
 * † Nephrolithus
 * † Nephrolithus frequens
 * † Nesodon
 * † Nesodon imbricatus
 * † Nesodon marmoratus – type locality for species
 * † Nesodon sp.
 * † Neuryurus
 * † Neuryurus giganteus – or unidentified comparable form
 * † Neuryurus sp. – tentative report
 * † Neuryurus sp.
 * † Neuryurus trabeculatus – type locality for species
 * † Neverita
 * † Neverita chiloensis
 * † Neverita groeberi
 * † Neverita keideli
 * † Nicaniella
 * † Nicaniella sp.
 * † Niolamia – type locality for genus
 * † Niolamia
 * † Niolamia argentina – type locality for species
 * † Nodipecten
 * † Nodipecten salis
 * † Notaphoebe
 * † Notaphoebe neogaea – type locality for species
 * † Notaphoebe ovatifolia – type locality for species
 * † Nothofagidites
 * † Nothofagidites acromegacanthus
 * † Nothofagidites americanus
 * † Nothofagidites aspera
 * † Nothofagidites brachispinulosa – or unidentified comparable form
 * † Nothofagidites brachispinulosa
 * † Nothofagidites brassii
 * † Nothofagidites cincta
 * † Nothofagidites cranwellae
 * † Nothofagidites deminuta
 * † Nothofagidites dorotensis
 * † Nothofagidites flemingii
 * † Nothofagidites fortispinulosus
 * † Nothofagidites fuegiensis
 * † Nothofagidites fusca
 * † Nothofagidites saraensis
 * † Nothofagidites sp.
 * † Nothofagidites sp. 1informal
 * † Nothofagidites sp. 4informal
 * † Nothofagidites sp. 5informal
 * † Nothofagidites sp. 6informal
 * † Nothofagidites spp.
 * † Nothofagidites suggatei
 * † Nothofagidites tehuelchesii
 * † Nothofagidites Tipo Dombeyiinformal
 * † Nothofagidites visserensis – type locality for species
 * † Nothofagidites visserensis
 * † Nothofagidites waipawaensis
 * † Nothofagoxylon
 * † Nothofagoxylon menendezii
 * † Nothofagoxylon paraprocera
 * † Nothofagoxylon triseriatum
 * † Nothofagus
 * † Nothofagus australis
 * † Nothofagus crenulata
 * † Nothofagus densinervosa
 * † Nothofagus elongata
 * † Nothofagus lanceolata
 * † Nothofagus magelhaenica – or unidentified comparable form
 * † Nothofagus magellanica
 * † Nothofagus obliqua – or unidentified comparable form
 * † Nothofagus serrulata
 * † Nothofagus simplicidens
 * † Nothofagus sp.
 * † Nothofagus variabilis
 * † Nothopollenites
 * † Nothopollenites sp.
 * † Nothura
 * † Nothura darwini
 * † Nothura sp.
 * † Notictis – type locality for genus
 * † Notictis
 * † Notictis ortizii – type locality for species
 * † Notictis ortizii
 * † Notiocetus – type locality for genus
 * † Notiocetus
 * † Notiocetus platensis – type locality for species
 * † Notiocetus romerianus – type locality for species
 * † Notocaiman – type locality for genus
 * † Notocaiman stromeri – type locality for species
 * † Notocetus – type locality for genus
 * † Notocetus
 * † Notocetus vanbenedeni – type locality for species
 * † Notocetus vanbenedeni
 * † Notocochlis
 * † Notocochlis isabelleana
 * † Notocynus – type locality for genus
 * † Notocynus hermosicus – type locality for species
 * † Notodiaphorus – type locality for genus
 * † Notodiaphorus crassus – type locality for species
 * † Notoetayoa – type locality for genus
 * † Notoetayoa gargantuai – type locality for species
 * † Notogale
 * † Notogale mitis
 * † Notogale tenuis
 * † Notohippus
 * † Notohippus sp.
 * † Notonychops – type locality for genus
 * † Notonychops powelli – type locality for species
 * † Notopachyrucos
 * † Notopachyrucos tambuttoi
 * † Notopithecus – tentative report
 * † Notopithecus
 * † Notopithecus adapinus – type locality for species
 * † Notopithecus adapinus – tentative report
 * † Notopithecus adapinus – or unidentified comparable form
 * † Notopithecus adapinus
 * † Notopithecus amplidens – type locality for species
 * † Notopithecus amplidens
 * † Notopithecus sp.
 * † Notopithecus summus – type locality for species
 * † Notopithecus trigodontoides – type locality for species
 * † Notorhinus – type locality for genus
 * † Notorhinus
 * † Notorhinus denticulatus – type locality for species
 * † Notorhinus haroldi – type locality for species
 * † Notostylops – type locality for genus
 * † Notostylops – tentative report
 * † Notostylops – or unidentified comparable form
 * † Notostylops
 * † Notostylops appressus – type locality for species
 * † Notostylops appressus
 * † Notostylops aspectans – type locality for species
 * † Notostylops bicinctus – type locality for species
 * † Notostylops brachycephalus – type locality for species
 * † Notostylops murinus – type locality for species
 * † Notostylops murinus – or unidentified comparable form
 * † Notostylops murinus
 * † Notostylops pendens – type locality for species
 * † Notostylops pendens
 * † Notostylops pigafettai – type locality for species
 * † Notostylops sp. – type locality for species
 * † Notostylops sp.
 * † Notoziphius – type locality for genus
 * † Notoziphius bruneti – type locality for species
 * † Nucula
 * † Nucula crassirugata
 * † Nucula dynastes
 * † Nucula grandis – type locality for species
 * † Nucula grandis
 * † Nucula guillermensis – type locality for species
 * † Nucula lunulae
 * † Nucula patagonica
 * † Nucula pisum
 * † Nucula reticularis
 * † Nucula semiundulata
 * † Nucula sp.
 * † Nucula stationis
 * † Nucula suboblonga – or unidentified comparable form
 * † Nucula suboblonga
 * † Nuculana – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Nuculana
 * † Nuculana amuriensis – or unidentified comparable form
 * † Nuculana sp.
 * † Nunezia – type locality for genus
 * † Nunezia caroloameghinoi – type locality for species
 * † Nyctaginites
 * † Nyctaginites ellipticus – type locality for species
 * † Nyctelia
 * † Nyctelia picipes
 * † Nyssapollenites
 * † Nyssapollenites endobalteus
 * † Oamaruia – tentative report
 * † Oamaruia cruzalis
 * † Oamaruia cruzialis
 * † Oamaruia gracilis
 * † Oamaruia observatoria
 * † Octodontotherium
 * † Octodontotherium sp.
 * † Octomylodon
 * † Octomylodon aversus
 * † Ocypode
 * † Ocypode vericoncava
 * † Odontaspis
 * † Odontaspis abbatei
 * † Odontaspis macrota
 * † Odontocymbiola
 * † Odontocymbiola magellanica
 * † Odontocymbiola pardelensis
 * † Odontocymbiola sp.
 * † Odontogryphaea
 * † Odontogryphaea burckhardti
 * † Odontogryphaea sp. – type locality for species
 * † Odontomysops – type locality for genus
 * † Odontomysops spiniferus – type locality for species
 * † Odontophrynus
 * † Odontophrynus americanus
 * † Odostomia
 * † Odostomia euryope
 * † Odostomia suturalis
 * † Odostomia synarthrota
 * † Oldfieldthomasia
 * † Oldfieldthomasia anfractuosa – type locality for species
 * † Oldfieldthomasia debilitata – type locality for species
 * † Oldfieldthomasia debilitata – or unidentified comparable form
 * † Oldfieldthomasia debilitata
 * † Oldfieldthomasia parvidens – type locality for species
 * † Oldfieldthomasia sp.
 * † Oldfieldthomasia transversa – type locality for species
 * † Oligobiotherium – type locality for genus
 * † Oligobiotherium
 * † Oligobiotherium divisum – type locality for species
 * † Oligobiotherium divisum
 * † Oligoryzomys
 * † Oligoryzomys flavescens – or unidentified comparable form
 * † Oligoryzomys longicaudatus – or unidentified comparable form
 * † Olivancillaria
 * † Olivancillaria fracassoensis
 * † Olivancillaria prisca
 * † Olivancillaria uretai – or unidentified related form
 * † Olivella
 * † Olivella fracassoensis
 * † Olivella plata – or unidentified related form
 * † Olivella puelcha
 * † Olsacheria
 * † Olsacheria argentina
 * † Omalogyra
 * † Omalogyra antarctica
 * † Omphalea
 * † Omphalea patagonica – type locality for species
 * † Onoba
 * † Onoba sp.
 * † Opalia
 * † Opalia rugulosa
 * † Opaliopsis
 * † Opaliopsis linaresi
 * † Operculodinium
 * † Operculodinium centrocarpum
 * † Operculodium
 * † Operculodium centrocarpum
 * † Ophiocrossota
 * † Ophiocrossota kollenbergorum
 * † Ophioglossisporites
 * † Ophioglossisporites cullensis
 * † Opisthodactylus
 * † Opisthodactylus kirchneri – type locality for species
 * † Opisthodactylus patagonicus
 * † Orapollis
 * † Orapollis sp.
 * † Oreodaphne
 * † Oreodaphne preacutifolia – type locality for species
 * † Oreodaphne sp.
 * † Oreopanax
 * † Oreopanax guinazui – type locality for species
 * † Ormenis
 * † Ormenis devincta – type locality for species
 * † Orthoarthrus – type locality for genus
 * † Orthoarthrus mixtus – type locality for species
 * † Orthogeniops – type locality for genus
 * † Orthogeniops ameghinoi – type locality for species
 * † Ortholophodon – type locality for genus
 * † Ortholophodon prolongus – type locality for species
 * † Orthomyctera
 * † Orthomyctera andina
 * † Orthomyctera lacunosa – or unidentified comparable form
 * † Orthomyctera sp.
 * † Ortmannia
 * † Ortmannia ortmanni
 * † Ortotherium
 * † Ortotherium brevirostrum
 * † Ortotherium laticurvatum
 * † Ortotherium robustum
 * † Osachila
 * † Osachila valdesensis
 * † Osmundacidites
 * † Osmundacidites ciliatus
 * † Osteophorus
 * † Osteophorus typus
 * † Ostrea – or unidentified comparable form
 * † Ostrea
 * † Ostrea agglomerans
 * † Ostrea alvarezi
 * † Ostrea axillata
 * † Ostrea damboreneae
 * † Ostrea elongata
 * † Ostrea entreriana
 * † Ostrea foliiformis
 * † Ostrea guaranitica – or unidentified comparable form
 * † Ostrea ingens
 * † Ostrea orbignyi
 * † Ostrea philippii
 * † Ostrea rionegrensis
 * † Ostrea semitabulata
 * † Ostrea sp.
 * † Ostrea strangulata
 * † Ostrea tehuelcha
 * † Ostrea vulselloides
 * † Ostrea wilckensi
 * † Ostrea wilckensis
 * † Otaria
 * † Otaria fischeri – type locality for species
 * † Otaria sp.
 * † Othnielmarshia – type locality for genus
 * † Othnielmarshia – tentative report
 * † Othnielmarshia
 * † Othnielmarshia curvicrista – type locality for species
 * † Othnielmarshia lacunifera – type locality for species
 * † Othnielmarshia lacunifera
 * † Othnielmarshia reflexa – type locality for species
 * † Othnielmarshia sp.
 * † Otiorhynchites
 * † Otiorhynchites aterrimus
 * † Otiorhynchites crassus – type locality for species
 * † Otodus
 * † Otodus megalodon
 * † Otrhonia – type locality for genus
 * † Otrhonia
 * † Otrhonia muehlbergi – type locality for species
 * † Otrhonia muehlbergi
 * † Ouratea
 * † Ouratea firmifolia
 * † Ovoidites
 * † Ovoidites spp.
 * † Oxybunotherium – type locality for genus
 * † Oxybunotherium praecursor – type locality for species
 * † Oxymycterus
 * † Oxymycterus sp.
 * † Oxymycterus wayku
 * † Oxyodontherium – tentative report
 * † Oxyodontherium
 * † Oxyodontherium piramydatus
 * † Oxyodontherium sp.
 * † Oxyodontherium zeballozi
 * † Ozotoceros
 * † Ozotoceros bezoarticus
 * † Pachimagas
 * † Pachimagas venter
 * † Pachybiotherium – type locality for genus
 * † Pachybiotherium
 * † Pachybiotherium acclinum – type locality for species
 * † Pachybiotherium acclinum – or unidentified comparable form
 * † Pachybiotherium illuminatum – type locality for species
 * † Pachycymbiola
 * † Pachycymbiola ameghinoi
 * † Pachycymbiola arriolensis
 * † Pachycymbiola brasiliana – or unidentified related form
 * † Pachycymbiola camachoi
 * † Pachymagas
 * † Pachymagas piramidesia
 * † Pachymagas sp.
 * † Pachymagus
 * † Pachymagus pyramidesia
 * † Pachymagus venter – or unidentified comparable form
 * † Pachynodon
 * † Pachynodon modicus
 * † Pachypithecus – type locality for genus
 * † Pachypithecus macrognathus – type locality for species
 * † Pachyrukhos
 * † Pachyrukhos moyani
 * † Pachyrukhos sp.
 * † Paedotherium
 * † Paedotherium bonaerense
 * † Paedotherium minor – or unidentified comparable form
 * † Paedotherium minor
 * † Paedotherium sp.
 * † Paedotherium typicum
 * † Paginula – type locality for genus
 * † Paginula
 * † Paginula parca – type locality for species
 * † Paginula parca
 * † Pagodula
 * † Pagodula carcellesi
 * † Pagodula carduelis – or unidentified related form
 * † Palacolama
 * † Palacolama weddelli
 * † Palaeobalaena – type locality for genus
 * † Palaeobalaena
 * † Palaeobalaena bergi – type locality for species
 * † Palaeobalaena bergi
 * † Palaeobalaena dubia
 * † Palaeocavia
 * † Palaeocavia sp.
 * † Palaeociconia
 * † Palaeociconia australis
 * † Palaeocoprosmadites
 * † Palaeocoprosmadites sp.
 * † Palaeocoprosmadites zelandiae
 * † Palaeoctodon
 * † Palaeoctodon simplicidens – or unidentified related form
 * † Palaeocystodinium
 * † Palaeocystodinium sp.
 * † Palaeohoplophorus
 * † Palaeohoplophorus antiquus
 * † Palaeolama
 * † Palaeolama sp.
 * † Palaeomacromia – type locality for genus
 * † Palaeomacromia multicellulata – type locality for species
 * † Palaeomelon
 * † Palaeomelon triplicata
 * † Palaeomyrmidon – type locality for genus
 * † Palaeomyrmidon incomptus – type locality for species
 * † Palaeopeltis
 * † Palaeopeltis inornatus
 * † Palaeopeltis tesseratus – type locality for species
 * † Palaeoperidinium
 * † Palaeoperidinium pyrophorum
 * † Palaeophya – type locality for genus
 * † Palaeophya argentina – type locality for species
 * † Palaeospheniscus – type locality for genus
 * † Palaeospheniscus
 * † Palaeospheniscus affinis
 * † Palaeospheniscus bergi – type locality for species
 * † Palaeospheniscus bergi
 * † Palaeospheniscus bilocular – type locality for species
 * † Palaeospheniscus gracilis
 * † Palaeospheniscus intermedius
 * † Palaeospheniscus interruptus
 * † Palaeospheniscus patagonicus – type locality for species
 * † Palaeospheniscus patagonicus
 * † Palaeospheniscus planus
 * † Palaeospheniscus rothi
 * † Palaeospheniscus wimani
 * † Palaeothentes
 * † Palaeothentes aratae
 * † Palaeothentes chubutensis
 * † Palaeothentes intermedius
 * † Palaeothentes lemoinei
 * † Palaeothentes lucina – type locality for species
 * † Palaeothentes lucina
 * † Palaeothentes minutus – tentative report
 * † Palaeothentes minutus
 * † Palaeothentes pascuali
 * † Palaeothentes praecursor – type locality for species
 * † Palaeothentes sp.
 * † Palaeotoxodon – tentative report
 * † Palaeotoxodon
 * † Palaeotoxodon paranensis
 * † Palaeotoxodon protoburmeisteri
 * † Palaeotoxodon virgatus
 * † Palangania – type locality for genus
 * † Palangania
 * † Palangania brandmayri – type locality for species
 * † Palangania brandmayri – or unidentified comparable form
 * † Palangania sp.
 * † Paleocavia
 * † Paleocavia sp.
 * † Paleospheniscus
 * † Paleospheniscus gracillis
 * † Paleuphractus
 * † Paleuphractus sp.
 * † Palmoxylon
 * † Palmoxylon patagonicum – type locality for species
 * † Palmoxylon patagonicum
 * † Palmoxylon sp. 1informal
 * † Palmoxylon sp. 2informal
 * † Pampahippus – type locality for genus
 * † Pampahippus – or unidentified comparable form
 * † Pampahippus
 * † Pampahippus arenalesi – type locality for species
 * † Pampahippus arenalesi
 * † Pampahippus powelli – type locality for species
 * † Pampahippus secundus – type locality for species
 * † Pampahippus sp.
 * † Pampamys
 * † Pampamys emmonsae
 * † Pampatemnus – type locality for genus
 * † Pampatemnus
 * † Pampatemnus deuteros – type locality for species
 * † Pampatemnus infernalis – type locality for species
 * † Pampatherium
 * † Pampatherium sp.
 * † Pampatherium typus
 * † Pandaniidites
 * † Pandaniidites sp.
 * † Panochthus
 * † Panochthus sp. – tentative report
 * † Panochthus sp.
 * † Panochthus tuberculatus
 * † Panopea
 * † Panopea clausa – or unidentified comparable form
 * † Panopea hauthali – or unidentified comparable form
 * † Panopea ibari
 * † Panopea inferior – or unidentified comparable form
 * † Panopea malvernensis – or unidentified comparable form
 * † Panopea nucleus – or unidentified related form
 * † Panopea nucleus
 * † Panopea pastorei
 * † Panopea patagonica
 * † Panopea prenucleus
 * † Panopea quemadensis – or unidentified comparable form
 * † Panopea quemadensis
 * † Panopea regularis
 * † Panopea sierrana
 * † Panopea simplex – or unidentified related form
 * † Panopea sp.
 * † Panopea sp. Ainformal
 * † Panopea sp. Dinformal
 * † Panopea thomasi
 * † Panopea torresi – or unidentified comparable form
 * † Panopea undatoides
 * † Panopea zinsmeisteri – type locality for species
 * † Panopeus
 * † Panopeus piramidensis
 * † Panthera
 * † Panthera onca
 * † Panthera platensis
 * † Pantostylops
 * † Pantostylops typus – type locality for species
 * † Papuacedrus
 * † Papuacedrus prechilensis
 * † Parabderites
 * † Parabderites bicrispatus
 * † Parabderites minusculus
 * † Parabderites sp.
 * † Paracacioxylon
 * † Paracacioxylon frenguellii – type locality for species
 * † Paradelphomys – type locality for genus
 * † Paradelphomys fissus – type locality for species
 * † Paradidelphys
 * † Paradidelphys pattersonii
 * † Paradoxomys
 * † Paradoxomys sp.
 * † Paraeuphractus
 * † Paraeuphractus prominens
 * † Paraeutatus
 * † Paraeutatus distans
 * † Paraeuthria
 * † Paraeuthria plumbea
 * † Paraglyptodon – or unidentified comparable form
 * † Paraglyptodon
 * † Paraglyptodon chapalmalensis
 * † Paraglyptodon paranensis
 * † Paraglyptodon uquiensis
 * † Parahoplophorus
 * † Parahoplophorus paranensis
 * † Parahyaenodon
 * † Parahyaenodon argentinus
 * † Parahydraspis – type locality for genus
 * † Parahydraspis paranaensis – type locality for species
 * † Paramyocastor
 * † Paramyocastor diligens – or unidentified comparable form
 * † Paramyocastor diligens
 * † Paranabradys – type locality for genus
 * † Paranabradys vucetichae – type locality for species
 * † Paranamys
 * † Paranamys sp.
 * † Paranauchenia
 * † Paranauchenia denticulata
 * † Paranymphaea
 * † Paranymphaea aristolochiaformis – type locality for species
 * † Paranymphaea aristolochiaformis
 * † Paraptenodytes – type locality for genus
 * † Paraptenodytes
 * † Paraptenodytes antarcticus – type locality for species
 * † Paraptenodytes antarcticus
 * † Paraptenodytes brodkorbi – type locality for species
 * † Paraptenodytes robustus
 * † Parastegosimpsonia
 * † Parastegosimpsonia peruana – or unidentified comparable form
 * † Parasteiromys
 * † Parasteiromys friantae – type locality for species
 * † Parasteiromys uniformis – type locality for species
 * † Parastrapotherium – type locality for genus
 * † Parastrapotherium
 * † Parastrapotherium crassum – type locality for species
 * † Parastrapotherium holmbergi – type locality for species
 * † Parastrapotherium holmbergi
 * † Parastrapotherium martiale
 * † Parastrapotherium sp.
 * † Parastrapotherium symmetrum – type locality for species
 * † Parastrapotherium voghti – type locality for species
 * † Pareuthria
 * † Pareuthria plumbea
 * † Pareuthria sp.
 * † Parinomya
 * † Parinomya juliense
 * † Parinomya juliensis
 * † Parinomya patagonensis
 * † Parodimys – tentative report
 * † Parodimys
 * † Parodimys sp.
 * † Parsonsidites
 * † Parsonsidites multiporus
 * † Parutaetus
 * † Parutaetus chicoensis – type locality for species
 * † Parutaetus chicoensis
 * † Parutaetus chilensis – tentative report
 * † Parutaetus chilensis – or unidentified comparable form
 * † Parutaetus chilensis
 * † Parutaetus clusus – type locality for species
 * † Parutaetus punaensis – type locality for species
 * † Parutaetus punaensis
 * † Parutaetus signatus – type locality for species
 * † Pascualia
 * † Pascualia laeviplicata – or unidentified related form
 * † Pascualodus – type locality for genus
 * † Pascualodus patagoniensis – type locality for species
 * † Patagonhippus – type locality for genus
 * † Patagonhippus
 * † Patagonhippus canterensis – type locality for species
 * † Patagonhippus dukei – type locality for species
 * † Patagonia – type locality for genus
 * † Patagonia peregrina – type locality for species
 * † Patagonicardium
 * † Patagonicardium philippi
 * † Patagorhynchia
 * † Patagorhynchia patagonica
 * † Patagornis – type locality for genus
 * † Patagornis
 * † Patagornis marshi – type locality for species
 * † Patagornis marshi
 * † Patagosmilus – type locality for genus
 * † Patagosmilus goini – type locality for species
 * † Patagumbonium
 * † Patagumbonium australis
 * † Patene – type locality for genus
 * † Patene
 * † Patene coluapiensis – type locality for species
 * † Patene simpsoni
 * † Patene sp.
 * † Patinopecten
 * † Patinopecten sp.
 * † Pauladelphys
 * † Pauladelphys sp.
 * † Paullinia
 * † Paullinia prerufescens – type locality for species
 * † Paullinia rubiginosifolia – type locality for species
 * † Paulogervaisia
 * † Paulogervaisia celata – type locality for species
 * † Paulogervaisia inusta – type locality for species
 * † Paulogervaisia inusta
 * † Paulogervaisia mamma – type locality for species
 * † Paulogervaisia porca – type locality for species
 * † Pecopteris
 * † Pecopteris buhsei
 * † Pecten
 * † Pecten proximus
 * † Pectinodonta
 * † Pectinodonta sp.
 * † Pediastrum
 * † Pediastrum boryanum
 * † Pediastrum musterii
 * † Pediastrum sp.
 * † Pediastrum spp.
 * † Pediastrum tetras – or unidentified comparable form
 * † Pediolagus
 * † Pediolagus salinicola
 * † Pehuenia
 * † Pehuenia magna – type locality for species
 * † Pelecyodon
 * † Pelecyodon cristatus
 * † Peligrochelys – type locality for genus
 * † Peligrochelys walshae – type locality for species
 * † Peligrotherium – type locality for genus
 * † Peligrotherium tropicalis – type locality for species
 * † Peltephilus
 * † Peltephilus ferox
 * † Peltephilus giganteus
 * † Peltephilus nanus
 * † Peltephilus pumilus
 * † Peltephilus sp.
 * † Peltephilus strepens
 * † Peltephilus undulatus
 * † Peninsulapollis
 * † Peninsulapollis askiniae
 * † Peninsulapollis gillii
 * † Peninsulapollis sp. 2informal
 * † Peninsulapollis truswelliae – or unidentified comparable form
 * † Penion
 * † Penion patagonensis
 * † Penion subrecta
 * † Pentastylomys
 * † Pentastylomys sp.
 * † Peonza
 * † Peonza torquata
 * † Perathereutes – type locality for genus
 * † Perathereutes – tentative report
 * † Perathereutes
 * † Perathereutes pungens – type locality for species
 * † Perathereutes pungens
 * † Peratotoma – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Peratotoma iheringi
 * † Percichthys
 * † Percichthys hondoensis – type locality for species
 * † Percichthys sp.
 * † Perfotricolpites
 * † Perfotricolpites sp.
 * † Periakros – type locality for genus
 * † Periakros ambiguus – type locality for species
 * † Peridinium
 * † Peridinium limbatum – or unidentified related form
 * † Peridinium sp.
 * † Perimys – tentative report
 * † Perimys
 * † Perimys dissimilis
 * † Perimys erutus
 * † Perimys incavatus
 * † Perimys intermedius – type locality for species
 * † Perimys intermedius
 * † Perimys sp.
 * † Perimys transversus
 * † Peripantostylops – tentative report
 * † Peripantostylops
 * † Peripantostylops minutus – type locality for species
 * † Peripantostylops minutus
 * † Peripantostylops orehor – type locality for species
 * † Peripantostylops sp.
 * † Periphragnis – type locality for genus
 * † Periphragnis – tentative report
 * † Periphragnis
 * † Periphragnis cristatus – type locality for species
 * † Periphragnis exauctus – type locality for species
 * † Periphragnis exauctus
 * † Periphragnis harmeri – type locality for species
 * † Periphragnis harmeri
 * † Periphragnis palmeri – type locality for species
 * † Periphragnis sp.
 * † Periploma
 * † Periploma primaverensis – type locality for species
 * † Periporopollenites
 * † Periporopollenites demarcatus
 * † Periporopollenites pallidus
 * † Periporopollenites vesicus
 * † Perissodonta
 * † Perissodonta ameghinoi
 * † Perissodonta minor – or unidentified comparable form
 * † Perissoptera
 * † Perissoptera monodactyla – or unidentified comparable form
 * † Perissoptera schlagintweiti
 * † Peromonolites
 * † Peromonolites sp.
 * † Peromonolites sp. 1informal
 * † Peromonolites sp. 2informal
 * † Peromonolites vellosus
 * † Perotrilites
 * † Perotrilites sp.
 * † Persea
 * † Persea microphylla – or unidentified comparable form
 * † Pesavis
 * † Pesavis spp.
 * † Petaloconchus
 * † Petaloconchus sp.
 * † Peumus
 * † Peumus clarki – type locality for species
 * † Peumus clarki
 * † Phalacrocorax
 * † Phalacrocorax brasilianus
 * † Phalacrocorax spp.
 * † Phanomys – type locality for genus
 * † Phanomys
 * † Phanomys mixtmus
 * † Phanomys mixtus – type locality for species
 * † Phanomys mixtus
 * † Phanomys vetulus – type locality for species
 * † Pharsophorus
 * † Pharsophorus lacerans – or unidentified comparable form
 * † Pharsophorus lacerans
 * † Pharsophorus sp.
 * † Phasianella
 * † Phasianella fossilis
 * † Philander
 * † Philander entrerianus
 * † Philobrya
 * † Philobrya sublaevis – tentative report
 * † Phlyctaenopyga
 * † Phlyctaenopyga ameghinoi
 * † Phoberodon – type locality for genus
 * † Phoberodon arctirostris – type locality for species
 * † Phoberomys
 * † Phoberomys burmeisteri
 * † Phoberomys insolita – type locality for species
 * † Phoberomys lozanoi – type locality for species
 * † Phoberomys minima – type locality for species
 * † Phoberomys praecursor – type locality for species
 * † Phoberomys sp.
 * † Phocoena
 * † Phocoena dioptrica
 * † Phoebe
 * † Phoebe elliptica
 * † Phoebe lanceolata
 * † Pholadidea
 * † Pholadidea frenguellii – type locality for species
 * † Pholadidea patagonica
 * † Pholadidea sp.
 * † Phonocdromus – type locality for genus
 * † Phonocdromus
 * † Phonocdromus gracilis – type locality for species
 * † Phonocdromus gracilis
 * † Phoradiadius – type locality for genus
 * † Phoradiadius divortiensis – type locality for species
 * † Phorusrhacos – type locality for genus
 * † Phorusrhacos
 * † Phorusrhacos longissimus – type locality for species
 * † Phorusrhacos longissimus
 * † Phrynops
 * † Phrynops geoffroanus – or unidentified comparable form
 * † Phtoramys
 * † Phtoramys hidalguense – or unidentified comparable form
 * † Phtoramys hidalguense
 * † Phtoramys homogenidens
 * † Phugatherium – type locality for genus
 * † Phugatherium
 * † Phugatherium cataclisticum
 * † Phugatherium novum
 * † Phugatherium pisanoi – type locality for species
 * † Phugatherium sp.
 * † Phyllites
 * † Phyllites clarki – type locality for species
 * † Phyllites mollinediaformis
 * † Phyllites nirihuaoensis – type locality for species
 * † Phyllites sloaneaformis – type locality for species
 * † Phyllites sp. – type locality for species
 * † Phyllites sp.
 * † Phyllites sp. 2informal
 * † Phyllites sp. 3informal
 * † Phyllocladidites
 * † Phyllocladidites elongatus
 * † Phyllocladidites mawsonii
 * † Phyllocladidites sp.
 * † Phyllocladidites verruscosus – or unidentified comparable form
 * † Phyllocladoxylon
 * † Phyllocladoxylon sp.
 * † Phyllotis
 * † Phyllotis anitae
 * † Phyllotis sp.
 * † Physornis
 * † Physornis sp.
 * † Picturotherium – type locality for genus
 * † Picturotherium
 * † Picturotherium migueli – type locality for species
 * † Picturotherium migueli
 * † Picunia – type locality for genus
 * † Picunia nitida – type locality for species
 * † Pilchenia
 * † Pilchenia antiqua – type locality for species
 * † Pilchenia intermedia – type locality for species
 * † Pimelodella
 * † Pimelodella leticeps – or unidentified related form
 * † Pinna
 * † Pinna anderssoni – or unidentified related form
 * † Pinna freneixae – or unidentified comparable form
 * † Pinna robusta
 * † Pinna sp.
 * † Piptadenioxylon
 * † Piptadenioxylon paraexcelsa – type locality for species
 * † Pisanodon
 * † Pisanodon nazari
 * † Pitar
 * † Pitar julianum
 * † Pitar laziarina
 * † Pitar rostratus
 * † Pithanotomys – or unidentified related form
 * † Pithanotomys
 * † Pithanotomys columnaris
 * † Pithanotomys macer
 * † Pithanotomys sp.
 * † Pitheculites
 * † Pitheculites sp.
 * † Pityrogramma
 * † Pityrogramma sp.
 * † Plagiocoelus – type locality for genus
 * † Plagiocoelus obliquus – type locality for species
 * † Plaina
 * † Plaina intermedia – or unidentified comparable form
 * † Plaina sp.
 * † Planops
 * † Planops magnus – type locality for species
 * † Plantago
 * † Plantago sp.
 * † Platygonus
 * † Platygonus chapadmalensis
 * † Platygonus chapalmalensis
 * † Platygonus marplatensis – type locality for species
 * † Platygonus marplatensis
 * † Platygonus uquiensis
 * † Platypittamys – type locality for genus
 * † Platypittamys brachyodon – type locality for species
 * † Platypygus
 * † Platypygus posthumus
 * † Plaxhaplus
 * † Plaxhaplus canaliculatus
 * † Plesiocetopsis
 * † Plesiocetopsis notopelagicus – type locality for species
 * † Plesiocetus
 * † Plesiocetus dyticus – type locality for species
 * † Plesiofelis – type locality for genus
 * † Plesiofelis
 * † Plesiofelis schlosseri – type locality for species
 * † Plesiomegatherium – or unidentified comparable form
 * † Plesiomegatherium
 * † Plesiomegatherium sp.
 * † Pleuromeris
 * † Pleuromeris camaronesia
 * † Pleuromeris cannada
 * † Pleuromeris cruzensis
 * † Pleuromeris elegantoides
 * † Pleuromeris sp.
 * † Pleuromeris sulcolunularis
 * † Pleurostylodon – type locality for genus
 * † Pleurostylodon – tentative report
 * † Pleurostylodon – or unidentified comparable form
 * † Pleurostylodon
 * † Pleurostylodon bifidus – type locality for species
 * † Pleurostylodon complanatus – type locality for species
 * † Pleurostylodon crassiramis – type locality for species
 * † Pleurostylodon modicus – type locality for species
 * † Pleurostylodon modicus
 * † Pleurostylodon notabilis – type locality for species
 * † Pleurostylodon recticrista – type locality for species
 * † Pleurostylodon similis – type locality for species
 * † Pleurostylodon similis – or unidentified comparable form
 * † Pleurostylodon similis
 * † Pleurostylodon sp.
 * † Pleurostylops – type locality for genus
 * † Pleurostylops glebosus – type locality for species
 * † Plicacesta
 * † Plicacesta sp.
 * † Plicatopollis
 * † Plicatopollis cretacea
 * † Plicatopollis wodehousi
 * † Plicatula
 * † Plicatula georgiana
 * † Plicifera
 * † Plicifera delicata
 * † Plicirhynchia
 * † Plicirhynchia plicigera
 * † Plicirhynichia
 * † Plicirhynichia plicigera
 * † Pliodolichotis
 * † Pliodolichotis sp.
 * † Pliolestes
 * † Pliolestes tripotamicus
 * † Pliolestes venetus – type locality for species
 * † Pliolestes venetus
 * † Pliomegatherium
 * † Pliomegatherium lelongi
 * † Pliomorphus
 * † Pliomorphus mutilatus
 * † Pliomorphus robustus
 * † Plohophorus
 * † Plohophorus araucanus
 * † Plohophorus cuneiformis
 * † Plohophorus figuratus – or unidentified related form
 * † Plohophorus figuratus
 * † Plohophorus paranensis
 * † Plumeria
 * † Plumeria articulatafolia – type locality for species
 * † Pluricellaesporites
 * † Pluricellaesporites sp. Ainformal
 * † Pluricellaesporites spp.
 * † Poacites
 * † Poacites chloriformis – type locality for species
 * † Poacites sp.
 * † Podabrus – tentative report
 * † Podabrus santaritensis – type locality for species
 * † Podocarpidites
 * † Podocarpidites elegans – or unidentified comparable form
 * † Podocarpidites elegans
 * † Podocarpidites ellipticus – or unidentified comparable form
 * † Podocarpidites ellipticus
 * † Podocarpidites exiguus – or unidentified comparable form
 * † Podocarpidites exiguus
 * † Podocarpidites magnus
 * † Podocarpidites marwickii – or unidentified comparable form
 * † Podocarpidites marwickii
 * † Podocarpidites marwikii
 * † Podocarpidites microreticuloidata
 * † Podocarpidites microreticuloidatus
 * † Podocarpidites psilasaccus – type locality for species
 * † Podocarpidites rugulosus
 * † Podocarpidites sp.
 * † Podocarpidites sp. 1informal
 * † Podocarpidites sp. 2informal
 * † Podocarpidites spp.
 * † Podocarpidites torquatus
 * † Podocarpidites verrucosus
 * † Podocarpoxylon
 * † Podocarpoxylon mazzonii
 * † Podocarpus
 * † Podocarpus andiniformis – type locality for species
 * † Podocarpus andiniformis
 * † Pododesmus
 * † Pododesmus paucisquamatus
 * † Polinices – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Polinices
 * † Polinices australis
 * † Polinices cerreria
 * † Polinices consimilis
 * † Polinices famula
 * † Polinices finlayi – or unidentified comparable form
 * † Polinices jorgensis
 * † Polinices ortmanni
 * † Polinices sanatacrucensis
 * † Polinices santacrucensis
 * † Polinices secunda
 * † Polinices sp. – type locality for species
 * † Polinices sp.
 * † Polinices subtenuis
 * † Polioexolobus – type locality for genus
 * † Polioexolobus prenuntius – type locality for species
 * † Poluspissusites
 * † Poluspissusites sp.
 * † Poluspissusites sp.1informal
 * † Polyacrodon – type locality for genus
 * † Polyacrodon
 * † Polyacrodon lanciformis – type locality for species
 * † Polyacrodon lanciformis
 * † Polyacrodon ligatus – type locality for species
 * † Polyacrodon ligatus
 * † Polyadasporonites
 * † Polyadasporonites spp.
 * † Polyadopollenites
 * † Polyadopollenites sp.
 * † Polycolporopollenites
 * † Polycolporopollenites esobalteus
 * † Polycolporopollenites sp.
 * † Polydolops – type locality for genus
 * † Polydolops – tentative report
 * † Polydolops
 * † Polydolops borcurhor
 * † Polydolops clavulus – type locality for species
 * † Polydolops crassus – type locality for species
 * † Polydolops kamektsen – type locality for species
 * † Polydolops rothi – type locality for species
 * † Polydolops rothi
 * † Polydolops serra – type locality for species
 * † Polydolops serra
 * † Polydolops sp.
 * † Polydolops sp. nov. 1informal
 * † Polydolops sp. nov. 2informal
 * † Polydolops sp. nov. 3informal
 * † Polydolops thomasi – type locality for species
 * † Polydolops thomasi
 * † Polydolops unicus – type locality for species
 * † Polydolops unicus
 * † Polydolops winecage – type locality for species
 * † Polylepis
 * † Polylepis prenuntia – type locality for species
 * † Polymesoda
 * † Polymesoda solobris
 * † Polymorphis – type locality for genus
 * † Polymorphis
 * † Polymorphis alius – type locality for species
 * † Polymorphis lechei – type locality for species
 * † Polymorphis lechei
 * † Polymorphis planus – type locality for species
 * † Polyorificites
 * † Polyorificites sp.
 * † Polypodiaceoisporites
 * † Polypodiaceoisporites retirugatus – or unidentified comparable form
 * † Polypodiaceoisporites simplex
 * † Polypodiaceoisporites sp.
 * † Polypodiaceoisporites tumulatus
 * † Polypodiidites
 * † Polypodiidites sp.
 * † Polypodiidites speciosus
 * † Polypodiisporites
 * † Polypodiisporites inangahuensis
 * † Polypodiisporites irregularis
 * † Polypodiisporites minimus – or unidentified comparable form
 * † Polypodiisporites radiatus
 * † Polypodiisporites speciosus
 * † Polyporina
 * † Polyporina romeroi – type locality for species
 * † Polyporina romeroi
 * † Polystira
 * † Polystira cingula
 * † Polystira sp.
 * † Pontistes
 * † Pontistes rectifrons – type locality for species
 * † Pontistes rectifrons
 * † Pontivaga – type locality for genus
 * † Pontivaga fischeri – type locality for species
 * † Porphyrula
 * † Porphyrula sp.
 * † Potamarchus
 * † Potamarchus sp.
 * † Pouterlabatia – type locality for genus
 * † Pouterlabatia clarki – type locality for species
 * † Pouterlabatia lanceolata – type locality for species
 * † Praedens – type locality for genus
 * † Praedens aberrans – type locality for species
 * † Preaulophyseter – type locality for genus
 * † Preaulophyseter gualichensis – type locality for species
 * † Prepidolops – type locality for genus
 * † Prepidolops
 * † Prepidolops didelphoides – type locality for species
 * † Prepidolops molinai – type locality for species
 * † Prepotherium
 * † Prepotherium filholi – type locality for species
 * † Prepotherium potens
 * † Prepotherium sp.
 * † Prinsius
 * † Prinsius dimorphosus
 * † Prionodelphis – type locality for genus
 * † Prionodelphis rovereti – type locality for species
 * † Priscaphander – tentative report
 * † Priscaphander – or unidentified comparable form
 * † Priscaphander
 * † Priscaphander bracaccini
 * † Priscaphander patagonica
 * † Priscaphander sanjosensis
 * † Priscaphander sp. Ainformal
 * † Proacrodon – type locality for genus
 * † Proacrodon transformatus – type locality for species
 * † Proadiantus – type locality for genus
 * † Proadiantus
 * † Proadiantus excavatus – type locality for species
 * † Proadiantus excavatus
 * † Proadiantus gibbus – type locality for species
 * † Proadinotherium
 * † Proadinotherium leptognathus
 * † Proadinotherium muensteri – or unidentified comparable form
 * † Proadinotherium sp.
 * † Proargyrohyrax
 * † Proargyrohyrax curanderensis
 * † Proargyrohyrax sp.
 * † Proargyrolagus
 * † Proargyrolagus argentinus – type locality for species
 * † Proborhyaena
 * † Proborhyaena gigantea
 * † Proborhyaena gigantia
 * † Proborhyaena sp.
 * † Procaroloameghinia
 * † Procaroloameghinia pricei
 * † Procladosictis – type locality for genus
 * † Procladosictis
 * † Procladosictis anomala – type locality for species
 * † Procladosictis erecta – type locality for species
 * † Procolpodon – type locality for genus
 * † Procolpodon foratus – type locality for species
 * † Prodaedicurus
 * † Prodaedicurus chapalmalensis – or unidentified comparable form
 * † Prodolichotis
 * † Prodolichotis prisca
 * † Prodolichotis sp.
 * † Proectocion
 * † Proectocion argentinus – type locality for species
 * † Proectocion precisus – type locality for species
 * † Proeuphractus
 * † Proeuphractus limpidus
 * † Proeuphractus setiger
 * † Proeuphractus sp.
 * † Proeutatus
 * † Proeutatus oenophorum
 * † Proeutatus robustus – type locality for species
 * † Proeutatus robustus
 * † Proeutatus sp.
 * † Proeutatus sp. 1informal
 * † Proeutatus sp. 2informal
 * † Progaleopithecus – type locality for genus
 * † Progaleopithecus
 * † Progaleopithecus fissurellatus – type locality for species
 * † Progaleopithecus sp.
 * † Progaleopithecus tournoueri – type locality for species
 * † Progaleopithecus tournoueri
 * † Progarzonia – type locality for genus
 * † Progarzonia notostylopense – type locality for species
 * † Prohegetotherium – type locality for genus
 * † Prohegetotherium
 * † Prohegetotherium malalhuense – type locality for species
 * † Prohegetotherium schiaffinoi – type locality for species
 * † Prohegetotherium schiaffinoi
 * † Prohegetotherium sculptum – type locality for species
 * † Prohegetotherium sculptum – or unidentified comparable form
 * † Prohegetotherium sculptum
 * † Prohegetotherium sp.
 * † Proheptaconus – type locality for genus
 * † Proheptaconus
 * † Proheptaconus patagonicus – type locality for species
 * † Prolagostomus
 * † Prolagostomus sp.
 * † Prolestodon
 * † Prolestodon antiquus
 * † Prolestodon paranensis
 * † Prolicaphrium
 * † Prolicaphrium spectabile
 * † Promacrauchenia
 * † Promacrauchenia antiqua
 * † Promacrauchenia kraglievichi
 * † Promacrauchenia sp.
 * † Promegalestes – type locality for genus
 * † Promegalestes singularis – type locality for species
 * † Promegatherium
 * † Promegatherium parvulum
 * † Promegatherium smaltatus
 * † Promoeritherium – type locality for genus
 * † Promoeritherium australe – type locality for species
 * † Promylodon
 * † Promylodon paranensis
 * † Promysops – tentative report
 * † Promysops primarius – type locality for species
 * † Pronothrotherium
 * † Pronothrotherium mirabilis
 * † Propachyrucos
 * † Propachyrucos ameghinorum – type locality for species
 * † Propachyrucos ameghinorum
 * † Propachyrucos smithwoodwardi – or unidentified comparable form
 * † Propachyrucos sp.
 * † Propalaehoplophorus
 * † Propalaehoplophorus australis
 * † Propalaehoplophorus incisivus
 * † Propalaehoplophorus minus
 * † Propalaehoplophorus sp.
 * † Propediolagus
 * † Propediolagus sp.
 * † Properiptychus
 * † Properiptychus argentinus – type locality for species
 * † Properiptychus argentinus
 * † Propithecia – type locality for genus
 * † Propithecia neuquenensis – type locality for species
 * † Proplanodus – type locality for genus
 * † Proplanodus adnepos – type locality for species
 * † Proplatyarthrus – type locality for genus
 * † Proplatyarthrus longipes – type locality for species
 * † Propraopus
 * † Propraopus sp.
 * † Propraopus sulcatus
 * † Propylipollis
 * † Propylipollis concretus
 * † Propylipollis lateflexus
 * † Propylipollis reticuloscabratus
 * † Propylipollis tenuiexinus – or unidentified comparable form
 * † Propyrotherium – type locality for genus
 * † Propyrotherium
 * † Propyrotherium saxeum – type locality for species
 * † Propyrotherium saxeum – or unidentified comparable form
 * † Propyrotherium saxeum
 * † Propyrotherium sp.
 * † Proscaphella
 * † Proscaphella cossmanni
 * † Proscaphella santacrucensis
 * † Proscelidodon – or unidentified comparable form
 * † Proscelidodon
 * † Proscelidodon patrius – or unidentified comparable form
 * † Proscelidodon patrius
 * † Proscelidodon sp.
 * † Prosopis
 * † Prosopis nigra
 * † Prosopis sp.
 * † Prosotherium – or unidentified comparable form
 * † Prosotherium
 * † Prosotherium garzoni
 * † Prosotherium sp.
 * † Prosotherium triangulidens
 * † Prospaniomys – tentative report
 * † Prospaniomys
 * † Prospaniomys priscus – or unidentified comparable form
 * † Prospaniomys priscus
 * † Prospaniomys sp. 1informal
 * † Prospaniomys sp. 2informal
 * † Prosqualodon – type locality for genus
 * † Prosqualodon
 * † Prosqualodon australis – type locality for species
 * † Prosqualodon australis
 * † Prostegotherium – tentative report
 * † Prostegotherium
 * † Prostegotherium astrifer – type locality for species
 * † Prostegotherium astrifer – or unidentified comparable form
 * † Prostegotherium notostylopianum – type locality for species
 * † Prostegotherium notostylopianum
 * † Prostegotherium sp.
 * † Prostichomys
 * † Prostichomys bowni – or unidentified comparable form
 * † Prostichomys bowni
 * † Prostylophorus – type locality for genus
 * † Prostylophorus margeriei – type locality for species
 * † Protabrocoma
 * † Protabrocoma sp.
 * † Protacaremys – tentative report
 * † Protacaremys
 * † Protacaremys adilos – type locality for species
 * † Protacaremys avunculus
 * † Protacaremys denisae – type locality for species
 * † Protacaremys prior
 * † Protacaremys pulchellus
 * † Protacaremys sp.
 * † Protadelphomys
 * † Protadelphomys latus
 * † Protamandua – type locality for genus
 * † Protamandua
 * † Protamandua rothi – type locality for species
 * † Protamandua rothi
 * † Protarchaeohyrax
 * † Protarchaeohyrax minor – type locality for species
 * † Protarchaeohyrax minor
 * † Protautoga
 * † Protautoga longidens
 * † Proteacidites
 * † Proteacidites angulatus
 * † Proteacidites asperatus – or unidentified comparable form
 * † Proteacidites granulatus
 * † Proteacidites obscurus
 * † Proteacidites parvus
 * † Proteacidites pseudomoides
 * † Proteacidites sp.
 * † Proteacidites sp. 1informal
 * † Proteacidites sp. 2informal
 * † Proteacidites sp. 3informal
 * † Proteacidites sp. 4informal
 * † Proteacidites sp. Ainformal
 * † Proteacidites sp. Binformal
 * † Proteacidites sp. Cinformal
 * † Proteacidites sp. Dinformal
 * † Proteacidites stipplatus
 * † Proteacidites subscabratus
 * † Proteacidites symphyonemoides
 * † Proteacidites tenuiexinus
 * † Proterocara – type locality for genus
 * † Proterocara argentina – type locality for species
 * † Proterocarcinus
 * † Proterocarcinus corsolini – type locality for species
 * † Proterocarcinus latus
 * † Proterocarcinus lophos – type locality for species
 * † Proterocarinus
 * † Proterocarinus latis
 * † Proterotherium
 * † Proterotherium americanum
 * † Proterotherium australis
 * † Proterotherium cervioides
 * † Proterotherium gradatum
 * † Protheosodon
 * † Protheosodon coniferus
 * † Prothoatherium
 * † Prothoatherium lacerum
 * † Prothylacynus – type locality for genus
 * † Prothylacynus
 * † Prothylacynus patagonicus – type locality for species
 * † Prothylacynus patagonicus
 * † Protibis
 * † Protibis cnemialis
 * † Protobradys – type locality for genus
 * † Protobradys harmonicus – type locality for species
 * † Protocallianassa
 * † Protocallianassa sp.
 * † Protocyon
 * † Protocyon scagliaruen
 * † Protodidelphis
 * † Protodidelphis – or unidentified comparable form sp. nov.informal
 * † Protodidelphis sp.
 * † Protodidelphis sp. nov.informal
 * † Protoglyptodon
 * † Protoglyptodon primiformis
 * † Protomegalonyx
 * † Protomegalonyx chasicoensis
 * † Protomegalonyx doellojuradoi
 * † Protomegalonyx praecursor
 * † Protomegamys
 * † Protomegamys sp.
 * † Protorhea – type locality for genus
 * † Protorhea azarae – type locality for species
 * † Protosteiromys
 * † Protosteiromys asmeodeophilus – type locality for species
 * † Protosteiromys asmodeophilus
 * † Protosteiromys medianus – type locality for species
 * † Protosteiromys medianus
 * † Protypotherium – or unidentified comparable form
 * † Protypotherium
 * † Protypotherium antiquum
 * † Protypotherium attenuatum
 * † Protypotherium australe
 * † Protypotherium praerutilum
 * † Protypotherium sp.
 * † Proxapertites
 * † Proxapertites operculatus
 * † Proxapertites sp.
 * † Prozaedyus – tentative report
 * † Prozaedyus
 * † Prozaedyus exilis
 * † Prozaedyus humilis
 * † Prozaedyus impressus – or unidentified related form
 * † Prozaedyus impressus
 * † Prozaedyus planus
 * † Prozaedyus proximus
 * † Prozaedyus sp.
 * † Prunum
 * † Prunum sp.
 * † Psammechinus
 * † Psammechinus iheringi
 * † Psammechinus lahillei – type locality for species
 * † Psammechinus tournoueri – type locality for species
 * † Pseudeutatus – type locality for genus
 * † Pseudeutatus – tentative report
 * † Pseudeutatus
 * † Pseudeutatus circundatus – type locality for species
 * † Pseudeutatus clypeus – type locality for species
 * † Pseudeutatus cuneiformis – type locality for species
 * † Pseudeutatus depictus – type locality for species
 * † Pseudeutatus depictus
 * † Pseudeutatus sp.
 * † Pseudhalmarhiphus
 * † Pseudhalmarhiphus guaraniticus – type locality for species
 * † Pseudhyrax – type locality for genus
 * † Pseudhyrax
 * † Pseudhyrax eutrachytheroides – type locality for species
 * † Pseudhyrax eutrachytheroides – tentative report
 * † Pseudhyrax eutrachytheroides
 * † Pseudhyrax strangulatus – type locality for species
 * † Pseudhyrax strangulatus
 * † Pseudoacaremys – type locality for genus
 * † Pseudoacaremys
 * † Pseudoacaremys kramarzi – type locality for species
 * † Pseudoacaremys kramarzi
 * † Pseudocladosictis
 * † Pseudocladosictis determinabile – type locality for species
 * † Pseudoeuryurus
 * † Pseudoeuryurus lelongianus
 * † Pseudofax
 * † Pseudofax costellatus
 * † Pseudofax solitaria
 * † Pseudoglyptodon
 * † Pseudoglyptodon chilensis – or unidentified comparable form
 * † Pseudoglyptodon sp.
 * † Pseudolimea
 * † Pseudolimea sp.
 * † Pseudolimea symmetricainformal
 * † Pseudolops – type locality for genus
 * † Pseudolops princeps – type locality for species
 * † Pseudolycopsis
 * † Pseudolycopsis cabrerai
 * † Pseudomacrauchenia
 * † Pseudomacrauchenia yepesi
 * † Pseudonotictis
 * † Pseudonotictis pusillus – type locality for species
 * † Pseudonotictis pusillus
 * † Pseudopachyrucos – type locality for genus
 * † Pseudopachyrucos foliiformis – type locality for species
 * † Pseudoplataeomys
 * † Pseudoplataeomys formosus
 * † Pseudoportlandia
 * † Pseudoportlandia glabra
 * † Pseudoschizaea
 * † Pseudoschizaea circula
 * † Pseudosigmomys
 * † Pseudosigmomys sp.
 * † Pseudospheniscus
 * † Pseudospheniscus concavus
 * † Pseudostegotherium – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Pseudostegotherium
 * † Pseudostegotherium chubutanum – type locality for species
 * † Pseudostegotherium glangeaudi
 * † Pseudothylacynus – type locality for genus
 * † Pseudothylacynus rectus – type locality for species
 * † Pseudotoxodon
 * † Pseudotoxodon formosus
 * † Pseudotylostoma
 * † Pseudotylostoma romeroi – or unidentified comparable form
 * † Pseudotylostoma romeroi
 * † Pseudotylostoma sp.
 * † Pseudotypotherium
 * † Pseudotypotherium bravardi
 * † Pseudotypotherium carhuense
 * † Pseudotypotherium sp.
 * † Pseudotypotherium subinsigne
 * † Pseudowinterapollis
 * † Pseudowinterapollis couperi
 * † Psewdowinterapollis
 * † Psewdowinterapollis couperi
 * † Psidium
 * † Psidium araciforme – type locality for species
 * † Psilamonocolpites
 * † Psilamonocolpites grandis
 * † Psilaperiporites
 * † Psilaperiporites minimus – or unidentified comparable form
 * † Psilatricolpites
 * † Psilatricolpites inargutus
 * † Psilatricolpites patagonicus
 * † Psilatricolpites psilascabratus
 * † Psilatricolpites sp.
 * † Psilatricolporites
 * † Psilatricolporites cyamus
 * † Psilatricolporites salamanquensis – or unidentified comparable form
 * † Psilatricolporites salamanquensis
 * † Psilatricolporites sp.
 * † Psilatricolporites sp. – or unidentified comparable form salamanquensisinformal
 * † Psilatricolporites sp. – or unidentified comparable form salamanquesisinformal
 * † Psilatricolporites sp. 1informal
 * † Psilatricolporites sp. 2informal
 * † Psilonichnus
 * † Psilonichnus sp.
 * † Psilopterus – type locality for genus
 * † Psilopterus
 * † Psilopterus bachmanni – type locality for species
 * † Psilopterus bachmanni
 * † Psilopterus colzecus
 * † Psilopterus lemoinei – type locality for species
 * † Psilopterus lemoinei
 * † Pteris
 * † Pteris nirihuaoensis – type locality for species
 * † Pteris sp.
 * † Pterocnemia
 * † Pterocnemia pennata
 * † Pterodonta
 * † Pterodonta patagonica
 * † Pteromyrtea
 * † Pteromyrtea crucialis
 * † Pteromyrtea danieli
 * † Pteromyrtea sp.
 * † Pteronura
 * † Pteronura brasiliensis
 * † Pucatherium
 * † Pucatherium parvum
 * † Puelia – type locality for genus
 * † Puelia – tentative report
 * † Puelia
 * † Puelia plicata – type locality for species
 * † Puelia sigma – type locality for species
 * † Puelia sp.
 * † Puma
 * † Puma concolor
 * † Puma sp.
 * † Punadolops
 * † Punadolops alonsoi – type locality for species
 * † Punadolops alonsoi
 * † Punahyrax – type locality for genus
 * † Punahyrax
 * † Punahyrax bondesioi – type locality for species
 * † Punahyrax bondesioi
 * † Punahyrax sp.
 * † Punapithecus – type locality for genus
 * † Punapithecus
 * † Punapithecus minor – type locality for species
 * † Punapithecus minor
 * † Punatherium – type locality for genus
 * † Punatherium catamarcensis – type locality for species
 * † Purpura
 * † Purpura chicoana
 * † Purpurocardia
 * † Purpurocardia sp.
 * † Pycnodonte
 * † Pycnodonte burckhardti
 * † Pycnodonte miradonensis
 * † Pycnodonte vesicularis
 * † Pygopistes
 * † Pygopistes parrasae – type locality for species
 * † Pyramidon – type locality for genus
 * † Pyramidon klaatschi – type locality for species
 * † Pyramiodontherium
 * † Pyramiodontherium bergi
 * † Pyramiodontherium carlesi – tentative report
 * † Pyramiodontherium scillatoyanei – type locality for species
 * † Pyramiodontherium sp.
 * † Pyropsis – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Pyropsis sp.
 * † Pyrotherium
 * † Pyrotherium romeroi
 * † Pyrotherium sorondoi
 * † Pyrotherium sp.
 * † Quintiniapollis
 * † Quintiniapollis sp.1informal
 * † Quintiniapollis striatulosa
 * † Radiodiscus
 * † Radiodiscus sp.
 * † Raja
 * † Raja agassizi
 * † Ranculcus
 * † Ranculcus scalabrinianus
 * † Raninoides
 * † Raninoides sp.
 * † Ranunculacidites
 * † Ranunculacidites operculatus
 * † Raulvaccia – type locality for genus
 * † Raulvaccia peligrensis – type locality for species
 * † Rboipites
 * † Rboipites cienaguensis – or unidentified comparable form
 * † Reboulisporites – type locality for genus
 * † Reboulisporites
 * † Reboulisporites fuegiensis – type locality for species
 * † Reboulisporites fuegiensis
 * † Reigechimys
 * † Reigechimys octodontiformis
 * † Reigechimys plesiodon – or unidentified comparable form
 * † Reigechimys plesiodon
 * † Reigia – type locality for genus
 * † Reigia punae – type locality for species
 * † Reithrodon
 * † Reithrodon auritus
 * † Reithrodon physodes – or unidentified comparable form
 * † Reithrodon physodes
 * † Remijia
 * † Remijia tenuiflorafolia – type locality for species
 * † Requisia – type locality for genus
 * † Requisia vidmari – type locality for species
 * † Restioniidites
 * † Restioniidites pascualii – type locality for species
 * † Restioniidites pascualii
 * † Reticulatisporites
 * † Reticulatisporites sp.
 * † Reticulatosphaera – tentative report
 * † Reticulatosphaera
 * † Reticulatosphaera actinocoronata
 * † Reticulochlamys
 * † Reticulochlamys borjasensis
 * † Reticulochlamys borjasiensis
 * † Reticulochlamys proxima
 * † Reticulochlamys zinsmeisteri
 * † Reticuloidosporites
 * † Reticuloidosporites tenellis – or unidentified comparable form
 * † Reticuloidosporites tenellis
 * † Retidiporites
 * † Retidiporites camachoi – type locality for species
 * † Retidiporites camachoi
 * † Retistephanocolpites
 * † Retistephanocolpites sp.
 * † Retitricolporites
 * † Retitricolporites chubutensis – type locality for species
 * † Retitricolporites chubutensis – or unidentified comparable form
 * † Retitricolporites chubutensis
 * † Retitricolporites minutiformis – or unidentified comparable form
 * † Retitricolporites minutiformis
 * † Retitricolporites sp. 1informal
 * † Retitriletes
 * † Retitriletes austroclavatidites
 * † Retitriletes eminulus
 * † Retitriletes rosewoodensis
 * † Retitriletes spp.
 * † Retritricolporites
 * † Retritricolporites cienaguensis
 * † Retrotapes
 * † Retrotapes exalbida
 * † Retrotapes scutata
 * † Retrotapes striatolamellata
 * † Retusa
 * † Retusa scutata – or unidentified comparable form
 * † Rhabdosporites
 * † Rhabdosporites sp.
 * † Rhamnidium – tentative report
 * † Rhamnidium – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Rhamnidium
 * † Rhamnidium patagonicum – type locality for species
 * † Rhamnidium preglabrum – type locality for species
 * † Rhamnidium TY025informal
 * † Rhamphostomopsis – type locality for genus
 * † Rhamphostomopsis
 * † Rhamphostomopsis neogaeus – type locality for species
 * † Rhea
 * † Rhea americana – or unidentified comparable form
 * † Rhea americana
 * † Rhea fossilis – type locality for species
 * † Rhea pampeana – type locality for species
 * † Rhea sp.
 * † Rhea subpampeana – type locality for species
 * † Rhinella
 * † Rhinella pisanoi – or unidentified comparable form
 * † Rhizophagites
 * † Rhizophagites butleri
 * † Rhizophoroxylon
 * † Rhizophoroxylon spallettii – type locality for species
 * † Rhodonascia
 * † Rhodonascia sp.
 * † Rhoipites
 * † Rhoipites alveolatus
 * † Rhoipites baculatus – type locality for species
 * † Rhoipites baculatus
 * † Rhoipites cienaguensis
 * † Rhoipites exiguus
 * † Rhoipites karamuensis
 * † Rhoipites minusculus – type locality for species
 * † Rhoipites minusculus
 * † Rhoipites romeroi
 * † Rhoipites santafesii
 * † Rhoipites sp.
 * † Rhoipites sp. Ainformal
 * † Rhoipites sphaerica
 * † Rhoipites spp.
 * † Rhoophyllum
 * † Rhoophyllum nordenskjoldi
 * † Rhynchippus – tentative report
 * † Rhynchippus
 * † Rhynchippus equinus
 * † Rhynchippus pumilus
 * † Rhyphodon – type locality for genus
 * † Rhyphodon
 * † Rhyphodon angusticephalus – type locality for species
 * † Rhyphodon lankesteri – type locality for species
 * † Rhyphodon lankesteri
 * † Ribodon – type locality for genus
 * † Ribodon limbatus – type locality for species
 * † Ricardolydekkeria – type locality for genus
 * † Ricardolydekkeria
 * † Ricardolydekkeria cinctula – type locality for species
 * † Ricardolydekkeria lunulata – type locality for species
 * † Ricardolydekkeria praerupta – type locality for species
 * † Ricardolydekkeria praerupta – or unidentified comparable form
 * † Ricardolydekkeria profunda – type locality for species
 * † Ricardolydekkeria sp.
 * † Ricciaesporites
 * † Ricciaesporites sp.
 * † Ricciopsis
 * † Ricciopsis sp.
 * † Ringueletia
 * † Ringueletia simpsoni
 * † Riostegotherium
 * † Riostegotherium sp.
 * † Robus
 * † Robus primaverae
 * † Rochinia
 * † Rochinia boschii
 * † Rochinia hystrixex gr.
 * † Rollinia – tentative report
 * † Rollinia patagonica – type locality for species
 * † Romaleon
 * † Romaleon parspinosus
 * † Rondeletia
 * † Rondeletia longiflorifolia – type locality for species
 * † Rosannia
 * † Rosannia manika
 * † Rosendolops – type locality for genus
 * † Rosendolops
 * † Rosendolops ebaios – type locality for species
 * † Rosendolops ebaios – or unidentified comparable form
 * † Rosendolops primigenium – type locality for species
 * † Rosendolops primigenium
 * † Rosendolops sp.
 * † Rostellaria – tentative report
 * † Rostellaria – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Rostellaria
 * † Rostellaria dusenianus – or unidentified related form
 * † Rostellaria elegans
 * † Rostellaria noachinus
 * † Rostellaria sp.
 * † Rostellaria stromeri
 * † Rostellaria torosus
 * † Rotadiscus
 * † Rotadiscus sp.
 * † Rousea
 * † Rousea microreticulata
 * † Rousea minuscula
 * † Rousea patagonica – type locality for species
 * † Rousea patagonica
 * † Rousea sp.
 * † Rouseisporites
 * † Rouseisporites sp.
 * † Rubiacites
 * † Rubiacites chomeliifolia – type locality for species
 * † Rubipollis
 * † Rubipollis oblatus
 * † Rubus
 * † Rubus sp.
 * † Rugulatisporites
 * † Rugulatisporites caperatus
 * † Rugulatisporites chubutensis
 * † Rugumonoporites
 * † Rugumonoporites sp. Ainformal
 * † Ruprechtia
 * † Ruprechtia latipedunculata – type locality for species
 * † Rutimeyeria – type locality for genus
 * † Rutimeyeria conulifera – type locality for species
 * † Sabalpollenites
 * † Sabalpollenites sp.
 * † Saccella
 * † Saccella pueyrredona
 * † Saccella tumida – or unidentified comparable form
 * † Sadypus
 * † Sadypus ascendens – type locality for species
 * † Sadypus confluens – type locality for species
 * † Sadypus confluens – or unidentified related form
 * † Sadypus confluens
 * † Sadypus minutus – type locality for species
 * † Sadypus tortuosus
 * † Sagmatias
 * † Sagmatias australis
 * † Salacia
 * † Salacia floribundifolia – type locality for species
 * † Sallacyon – or unidentified comparable form
 * † Sallacyon hoffstetteri
 * † Salvinia
 * † Salvinia graui
 * † Salvinia minima – or unidentified comparable form
 * † Santiagorothia
 * † Santiagorothia chiliensis
 * † Sapindus
 * † Sapindus argentinus – type locality for species
 * † Sapindus argentinus
 * † Sapindus sp.
 * † Sarcoramphus
 * † Sarcoramphus fossilis – type locality for species
 * † Sargus
 * † Sargus incertus
 * † Sassia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Sassia
 * † Sassia armata
 * † Sassia bicegoi
 * † Sassia mathewi – or unidentified related form
 * † Sassia matthewi – or unidentified related form
 * † Sassia morgani
 * † Satshatemnus – type locality for genus
 * † Satshatemnus bonapartei – type locality for species
 * † Saurocetes – type locality for genus
 * † Saurocetes
 * † Saurocetes argentinus – type locality for species
 * † Saurocetes gigas – type locality for species
 * † Savatieria
 * † Savatieria frigida
 * † Saxegothopsis
 * † Saxegothopsis fuegianus
 * † Scaglia – type locality for genus
 * † Scaglia kraglievichorum – type locality for species
 * † Scalabrinitherium
 * † Scalabrinitherium bravardi
 * † Scalabrinitherium paranense
 * † Scalabrinitherium rothii
 * † Scalaria
 * † Scalaria minuta
 * † Scalaria rugulosa
 * † Scaphander
 * † Scaphander sp.
 * † Scapteromys
 * † Scapteromys hershkovitzi
 * † Scarrittia – type locality for genus
 * † Scarrittia
 * † Scarrittia barranquensis – type locality for species
 * † Scarrittia barranquensis
 * † Scarrittia canquelensis – type locality for species
 * † Scarrittia canquelensis – or unidentified comparable form
 * † Scelidodon – tentative report
 * † Scelidodon
 * † Scelidodon chiliense
 * † Scelidodon sp.
 * † Scelidotheridium
 * † Scelidotheridium sp.
 * † Scelidotherium
 * † Scelidotherium leptocephalum – or unidentified comparable form
 * † Scelidotherium leptocephalum
 * † Scelidotherium pendolai
 * † Scelidotherium sp.
 * † Scenedesmus
 * † Scenedesmus sp.
 * † Schinopsis
 * † Schinopsis balansiformis – type locality for species
 * † Schinopsis lorentzii – tentative report
 * † Schinopsis lorentzii – or unidentified related form
 * † Schinopsis lorentzii
 * † Schinopsis morongifolia – type locality for species
 * † Schinopsis patagonica – type locality for species
 * † Schinus
 * † Schinus herbstii
 * † Schinus molleformis – type locality for species
 * † Schismotherium
 * † Schismotherium rectangularis – type locality for species
 * † Schizaster – tentative report
 * † Schizaster
 * † Schizaster ameghinoi
 * † Schizaster patagonensis
 * † Schizaster sp.
 * † Schizosporis
 * † Schizosporis reticulatus
 * † Schmidelia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Schmidelia
 * † Schmidelia eduliforma – type locality for species
 * † Schmidelia graciliforma – type locality for species
 * † Schmidelia proedulis – type locality for species
 * † Schmidelia proedulis
 * † Sciamys
 * † Sciamys petisensis – type locality for species
 * † Sciamys sp.
 * † Scirpites
 * † Scirpites sp.
 * † Scirpitis
 * † Scirpitis sp.
 * † Scirrotherium
 * † Scirrotherium carinatum – type locality for species
 * † Scirrotherium carinatum
 * † Scissurella – tentative report
 * † Scissurella
 * † Scissurella scotti
 * † Scissurella timora – tentative report
 * † Sclerocalyptus
 * † Sclerocalyptus ornatus – or unidentified comparable form
 * † Scleromys
 * † Scleromys osbornianus
 * † Scleromys quadrangulatus – type locality for species
 * † Scleromys quadrangulatus
 * † Scleromys sp.
 * † Sconcia
 * † Sconcia ovolum
 * † Sconsia
 * † Sconsia magdai
 * † Scotamys – type locality for genus
 * † Scotamys
 * † Scotamys antiquus – type locality for species
 * † Scotamys antiquus
 * † Scotobius
 * † Scotobius pilularius
 * † Scurria
 * † Scurria scurra
 * † Scutella
 * † Scutella innominata
 * † Sebecus – type locality for genus
 * † Sebecus – tentative report
 * † Sebecus – or unidentified comparable form
 * † Sebecus
 * † Sebecus icaeorhinus – type locality for species
 * † Sebecus icaeorhinus
 * † Sebecus sp.
 * † Selaginella
 * † Selaginella perinata
 * † Selenopemphix
 * † Selenopemphix coronata – or unidentified comparable form
 * † Selenopemphix crenata – or unidentified comparable form
 * † Selenopemphix sp.
 * † Selenopemphix warriensis
 * † Senipites
 * † Senipites patagonica
 * † Senipites patogonica
 * † Senipites sp.
 * † Senipites sp.1informal
 * † Senipites tercrassata – type locality for species
 * † Senipites tercrassata
 * † Senna
 * † Senna sp.
 * † Senoniasphaera
 * † Senoniasphaera inornata
 * † Sepedonium
 * † Sepedonium sp.
 * † Septifer
 * † Septifer mayai – type locality for species
 * † Serjania
 * † Serjania sp.
 * † Serpula – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Serpula
 * † Serpula patagonica
 * † Serpula sp.
 * † Serratina
 * † Serratina sp.
 * † Sestrosporites
 * † Sestrosporites pseudoalveolatus
 * † Seudenius – type locality for genus
 * † Seudenius cteronc – type locality for species
 * † Shecenia – type locality for genus
 * † Shecenia
 * † Shecenia ctirneru – type locality for species
 * † Shecenia sp.
 * † Shelania – type locality for genus
 * † Shelania
 * † Shelania laurenti – type locality for species
 * † Shelania pascuali – type locality for species
 * † Shelania pascuali
 * † Siderastrea
 * † Siderastrea adkinsi
 * † Sideroseris
 * † Sideroseris durhami
 * † Sigapatella
 * † Sigapatella americana
 * † Silurus
 * † Silurus agassizii
 * † Simpsonotus – type locality for genus
 * † Simpsonotus
 * † Simpsonotus major – type locality for species
 * † Simpsonotus major
 * † Simpsonotus praecursor – type locality for species
 * † Sinhapalops
 * † Sinhapalops jujuyensis – tentative report
 * † Sipalocyon
 * † Sipalocyon externus – type locality for species
 * † Sipalocyon gracilis – type locality for species
 * † Sipalocyon gracilis
 * † Sipalocyon obusta – type locality for species
 * † Sipalocyon sp.
 * † Siphocypraea
 * † Siphocypraea posei
 * † Siphonalia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Siphonalia noachina
 * † Siphonalia ortmanni
 * † Siphonaria
 * † Siphonaria lessoni
 * † Smilacipites
 * † Smilacipites saltensis
 * † Smilacipites sp.
 * † Smilodon
 * † Smilodon bonaerensis
 * † Smilodon ensenadenis
 * † Smilodon populator
 * † Smilodon riggi
 * † Smilodon riggii
 * † Smilodon sp.
 * † Solanumxylon
 * † Solanumxylon paranensis – type locality for species
 * † Solariella
 * † Solariella dautzembergi
 * † Solariella osborni
 * † Solea
 * † Solea sp.
 * † Solena
 * † Solena crucis
 * † Solena hunickeni – type locality for species
 * † Soriacebus – or unidentified comparable form
 * † Soriacebus
 * † Soriacebus adrianae – type locality for species
 * † Soriacebus adrianae
 * † Soriacebus ameghinorum – type locality for species
 * † Soriacebus ameghinorum – or unidentified comparable form
 * † Soriacebus ameghinorum
 * † Soriacebus sp.
 * † Soriamys – type locality for genus
 * † Soriamys
 * † Soriamys gaimanensis – type locality for species
 * † Soriamys ganganensis – type locality for species
 * † Soriamys sp.
 * † Spaniomys
 * † Spaniomys modestus
 * † Sparassocynus
 * † Sparassocynus sp.
 * † Sparganiaceaepollenites
 * † Sparganiaceaepollenites barungensis
 * † Sparganiaceaepollenites delicata
 * † Sparganiaceaepollenites sp.
 * † Sparganiaceaepollenites sphericus
 * † Sparnotheriodon
 * † Sparnotheriodon epsilonoides
 * † Sparus
 * † Sparus antiquus
 * † Sphenotherus
 * † Sphenotherus paranensis
 * † Sphenotherus zavaletianus
 * † Sphenotrochus
 * † Sphenotrochus gardineri – or unidentified related form
 * † Sphirna
 * † Sphirna prisca
 * † Sphyrna
 * † Sphyrna sp.
 * † Spineilo
 * † Spineilo elongata – or unidentified comparable form
 * † Spineilo perdita
 * † Spiniferidae
 * † Spiniferidae spp.
 * † Spiniferites
 * † Spiniferites mirabilis
 * † Spiniferites sp.
 * † Spinitricolpites
 * † Spinitricolpites sp.
 * † Spinizonocolpites
 * † Spinizonocolpites complex
 * † Spinizonocolpites hialinus
 * † Spinizonocolpites sp.
 * † Spinizonocolpites spp.
 * † Spirocolpus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Spirocolpus
 * † Spirocolpus adapicis
 * † Spirocolpus feruglioi
 * † Spirocolpus pyramidesia
 * † Spirogalerus
 * † Spirogalerus laevis – or unidentified comparable form
 * † Spirogyra
 * † Spirogyra sp. 1informal
 * † Spirogyra sp. 2informal
 * † Spirogyra sp. Tipo Ainformal
 * † Spirogyra sp. Tipo Binformal
 * † Spirogyra sp. Tipo Cinformal
 * † Spissatella
 * † Spissatella longior
 * † Spissatella lyelli
 * † Squalus
 * † Squalus eocenus
 * † Squalus obliquidens
 * † Squalus sp.
 * † Squatina
 * † Squatina sp.
 * † Srivastavapollenites
 * † Srivastavapollenites exoticus
 * † Staurodon
 * † Staurodon supernus – type locality for species
 * † Staurolithites
 * † Staurolithites sp.
 * † Stegomastodon
 * † Stegomastodon platensis – or unidentified comparable form
 * † Stegomastodon platensis
 * † Stegomastodon sp.
 * † Stegomastodon superbus
 * † Stegosimpsonia
 * † Stegosimpsonia sp.
 * † Stegotherium
 * † Stegotherium notohippidensis – type locality for species
 * † Stegotherium notohippidensis
 * † Stegotherium tauberi
 * † Stegotherium tesselatum
 * † Stegotherium variegatum
 * † Steiromys
 * † Steiromys detentus
 * † Steiromys duplicatus
 * † Steiromys principalis
 * † Stenogenium
 * † Stenogenium aenigmaticum – type locality for species
 * † Stenotatus – tentative report
 * † Stenotatus – or unidentified comparable form
 * † Stenotatus
 * † Stenotatus hesternus
 * † Stenotatus ornatus – or unidentified related form
 * † Stenotatus sp.
 * † Stenotephanos
 * † Stenotephanos plicidens
 * † Stephadiscus
 * † Stephadiscus sp.
 * † Stephanoda
 * † Stephanoda mazzonii – tentative report
 * † Sterculia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Sterculia
 * † Sterculia acuminataloba – type locality for species
 * † Sterculia acuminataloba
 * † Sterculia guinazui – type locality for species
 * † Sterculia patagonica – type locality for species
 * † Sterculia patagonica
 * † Sterculia washburnii – type locality for species
 * † Sterculia washburnii
 * † Stereisporites
 * † Stereisporites antiquasporites
 * † Stereisporites regium
 * † Stereisporites sp.
 * † Stereisporites sp. 2informal
 * † Stichomys
 * † Stichomys sp.
 * † Stilotherium – type locality for genus
 * † Stilotherium
 * † Stilotherium dissimile – type locality for species
 * † Stilotherium dissimile
 * † Strabosodon
 * † Strabosodon acuticavus
 * † Strabosodon obtusicavus
 * † Stramonita
 * † Stramonita homogeneus
 * † Striasyncolpites
 * † Striasyncolpites laxus
 * † Striatopollis
 * † Striatopollis exiguus
 * † Striatopollis sp.
 * † Striatricolpopites
 * † Striatricolpopites gamerroi
 * † Striatricolporites
 * † Striatricolporites gamerroi – type locality for species
 * † Striatricolporites gamerroi
 * † Stromaphorus
 * † Stromaphorus compressidens
 * † Stromaphorus sp.
 * † Strophostephanos
 * † Strophostephanos sp.
 * † Struthiochenopus
 * † Struthiochenopus santacrucensis
 * † Struthiolarella
 * † Struthiolarella ameghinoi
 * † Struthiolarella cuevensis
 * † Struthiolarella densestriata
 * † Struthiolarella fueguina – or unidentified related form
 * † Struthiolarella multinodosa
 * † Struthiolarella ornata
 * † Struthiolarella patagoniensis
 * † Struthiolarella senoniana
 * † Struthiolaria
 * † Struthiolaria hatcheri
 * † Struthiolaria ornata
 * † Struthiolaria senoniana
 * † Struthiolariopsis
 * † Struthiolariopsis ferrieri – or unidentified related form
 * † Struthioptera
 * † Struthioptera osiris – or unidentified related form
 * † Struthioptera sp.
 * † Strychnos
 * † Strychnos mirhojana – type locality for species
 * † Strychnos patagonica
 * † Styloceras
 * † Styloceras tertiarium – type locality for species
 * † Stylocynus – type locality for genus
 * † Stylocynus
 * † Stylocynus paranensis – type locality for species
 * † Stylocynus paranensis
 * † Styrax
 * † Styrax acuminatiformis – type locality for species
 * † Styrax acuminatiformis
 * † Styrax glandulifera – type locality for species
 * † Succinea
 * † Succinea meridionalis
 * † Sudamerica – type locality for genus
 * † Sudamerica
 * † Sudamerica ameghinoi – type locality for species
 * † Sudamerica ameghinoi
 * † Suniodon – type locality for genus
 * † Suniodon
 * † Suniodon catamarcensis – type locality for species
 * † Suniodon sp.
 * † Sveltia
 * † Sveltia major
 * † Symplocos
 * † Symplocos commutatifolia – type locality for species
 * † Syndemicolpites
 * † Syndemicolpites petriellai – type locality for species
 * † Syndemicolpites petriellai
 * † Tabebuia
 * † Tabebuia ipiformis – type locality for species
 * † Tacheria – type locality for genus
 * † Tacheria troyana – type locality for species
 * † Tafimys – type locality for genus
 * † Tafimys powelli – type locality for species
 * † Tagelus
 * † Tagelus plebeius
 * † Taioma
 * † Taioma tricarinata – or unidentified comparable form
 * † Tanyosphaeridium
 * † Tanyosphaeridium sp.
 * † Tapes
 * † Tapes sp.
 * † Tapirus
 * † Tapirus greslebini – type locality for species
 * † Tapirus mesopotamicus – type locality for species
 * † Tasmacetus
 * † Tasmacetus shepherdi
 * † Tasmanites
 * † Tasmanites sp.
 * † Tasmanites spp.
 * † Tawera
 * † Tawera canalei
 * † Tawera gayi
 * † Tayassu
 * † Tayassu pecari
 * † Tayassu sp.
 * † Tayassu tajacu
 * † Tegula
 * † Tegula abavus
 * † Tegula americanus
 * † Tegula jeguaensis
 * † Tegula orbignyana
 * † Tegula princeps
 * † Tegula sp.
 * † Tegulorhynchia
 * † Tegulorhynchia squamosa
 * † Teinostoma
 * † Teinostoma andrium – or unidentified related form
 * † Teinostoma sp. Ainformal
 * † Teinostoma sp. Binformal
 * † Tellina – tentative report
 * † Tellina
 * † Tellina jeguaensis
 * † Tellina ovalleana
 * † Tellina patagonica – tentative report
 * † Tellina patagonica
 * † Tellina sp.
 * † Telmabates – type locality for genus
 * † Telmabates
 * † Telmabates antiquus – type locality for species
 * † Telmabates howardae – type locality for species
 * † Tenagodus
 * † Tenagodus cossmani
 * † Tenebrionites
 * † Tenebrionites inclinans
 * † Terebra
 * † Terebra laudata
 * † Terebra santacruzensis
 * † Terebratella
 * † Terebratella dorsata
 * † Terebratella paliquena
 * † Terebratella patagonica
 * † Terebratella sp.
 * † Terebratella sp. Ainformal
 * † Terebratella sp. Binformal
 * † Terminalioxylon
 * † Terminalioxylon concordiensis – type locality for species
 * † Testudo
 * † Testudo formosa – type locality for species
 * † Tetracera – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Tetracera
 * † Tetracera patagonica – type locality for species
 * † Tetracera patagonica
 * † Tetracera sp.
 * † Tetracolporites
 * † Tetracolporites spectabilis
 * † Tetracolporopollenites
 * † Tetracolporopollenites costatus
 * † Tetracolporopollenites megadolium
 * † Tetraedron
 * † Tetraedron minimum – or unidentified comparable form
 * † Tetramerorhinus
 * † Tetramerorhinus cingulatum – tentative report
 * † Tetramerorhinus cingulatum
 * † Tetramerorhinus fleaglei – type locality for species
 * † Tetramerorhinus fleaglei
 * † Tetramerorhinus fortis – type locality for species
 * † Tetramerorhinus lucarius
 * † Tetramerorhinus mixtum – type locality for species
 * † Tetramerorhinus mixtum
 * † Tetramerorhinus prosistens
 * † Tetramerorhinus sp.
 * † Tetrapteris
 * † Tetrapteris precrebrifolia – type locality for species
 * † Tetrastylus – tentative report
 * † Tetrastylus
 * † Tetrastylus araucanus
 * † Tetrastylus intermedius
 * † Tetrastylus sp.
 * † Thalassinoides
 * † Thalassinoides sp.
 * † Thaumastoplax
 * † Thaumastoplax rocaensis – type locality for species
 * † Thegornis
 * † Thegornis debilis
 * † Thegornis musculosus
 * † Theosodon – or unidentified comparable form
 * † Theosodon
 * † Theosodon garrettorum – type locality for species
 * † Theosodon gracilis
 * † Theosodon lydekkeri – type locality for species
 * † Theosodon lydekkeri
 * † Theosodon sp.
 * † Theridomysops
 * † Theridomysops parvulus
 * † Theriodictis
 * † Theriodictis sp.
 * † Thoatherium
 * † Thoatherium minusculum
 * † Thoatherium sp.
 * † Thomashuxleya – type locality for genus
 * † Thomashuxleya – or unidentified related form
 * † Thomashuxleya
 * † Thomashuxleya externa – type locality for species
 * † Thomashuxleya externa
 * † Thomashuxleya principialis – type locality for species
 * † Thomashuxleya rostrata – type locality for species
 * † Thomashuxleya rostrata
 * † Thomashuxleya sp.
 * † Thouinia
 * † Thouinia philippii
 * † Thracia – tentative report
 * † Thracia sp.
 * † Thylacosmilus
 * † Thylacosmilus atrox – or unidentified comparable form
 * † Thylacosmilus atrox
 * † Thylamys
 * † Thylamys pinei – type locality for species
 * † Thylamys pinei
 * † Thylamys pusillus
 * † Thylamys sp.
 * † Thylatheridium
 * † Thylatheridium dolgopolae
 * † Thylatheridium hudsoni
 * † Thylatheridium pascuali
 * † Thylatheridium sp.
 * † Thylophorops
 * † Thylophorops chapalmalensis
 * † Thyridates
 * † Thyridates novokschonovi – type locality for species
 * † Tibouchina
 * † Tibouchina sp.
 * † Tinamisornis
 * † Tinamisornis intermedius
 * † Tinamisornis parvulus
 * † Tindariopsis
 * † Tindariopsis sulculata
 * † Tinea
 * † Tinea biselliella
 * † Titanothentes
 * † Titanothentes sp.
 * † Todisporites
 * † Todisporites major
 * † Todisporites minor – or unidentified comparable form
 * † Todisporites minor
 * † Todisporites sp.
 * † Tolypeutes
 * † Tolypeutes pampaeus
 * † Tolypeutes sp.
 * † Tolypeutes tricinctus – or unidentified comparable form
 * † Tolypeutes tricinctus
 * † Tonostylops – type locality for genus
 * † Tonostylops spissus – type locality for species
 * † Torcellia
 * † Torcellia paranense
 * † Torcula
 * † Torcula magna
 * † Tornatellacea
 * † Tornatellacea patagonicus
 * † Tornatellaea – or unidentified comparable form
 * † Tornatellaea
 * † Tornatellaea guillermoi
 * † Tornatellaea morbosa – or unidentified comparable form
 * † Tornatellaea patagonica – or unidentified related form
 * † Tornatellaea sp.
 * † Toxodon
 * † Toxodon bilobidens
 * † Toxodon chapalmalensis
 * † Toxodon gezi – or unidentified comparable form
 * † Toxodon paranensis
 * † Toxodon platensis
 * † Toxodon sp.
 * † Toxodontherium
 * † Toxodontherium compressum
 * † Toxodontherium reverendum
 * † Toxodontherium sp.
 * † Trachelomonas
 * † Trachelomonas sp.
 * † Trachycalyptus – tentative report
 * † Trachycalyptus – or unidentified comparable form
 * † Trachycalyptus cingulatus
 * † Trachycalyptus sp.
 * † Trachycardium – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Trachycardium
 * † Trachycardium puelchum
 * † Trachytherus – type locality for genus
 * † Trachytherus
 * † Trachytherus mendocensis – type locality for species
 * † Trachytherus sp.
 * † Trachytherus spegazzinianus – type locality for species
 * † Trachytherus spegazzinianus – or unidentified comparable form
 * † Trachytherus spegazzinianus
 * † Trachytypotherium
 * † Trachytypotherium sp.
 * † Transeptaesporites – or unidentified comparable form
 * † Transeptaesporites spp.
 * † Transpithecus – type locality for genus
 * † Transpithecus
 * † Transpithecus obtentus – type locality for species
 * † Transpithecus obtentus – tentative report
 * † Transpithecus obtentus
 * † Transpithecus sp.
 * † Treleudytes
 * † Treleudytes crassa
 * † Tremacebus – type locality for genus
 * † Tremacebus harringtoni – type locality for species
 * † Tremacyllus – or unidentified comparable form
 * † Tremacyllus
 * † Tremacyllus impressus – or unidentified comparable form
 * † Tremacyllus impressus
 * † Tremacyllus latifrons
 * † Tremacyllus sp.
 * † Triatriopollenites
 * † Triatriopollenites bertelsii – type locality for species
 * † Triatriopollenites bertelsii
 * † Triatriopollenites lateflexus – type locality for species
 * † Triatriopollenites lateflexus
 * † Triatriopollenites sp. 1informal
 * † Trichilia
 * † Trichilia catignoides – type locality for species
 * † Trichilia moritziformis – type locality for species
 * † Trichodes – tentative report
 * † Trichodes stebingeri – type locality for species
 * † Trichopeltarion
 * † Trichopeltarion levis – type locality for species
 * † Trichosirius – tentative report
 * † Trichosirius patagonica
 * † Trichotomosulcites
 * † Trichotomosulcites subgranulatus
 * † Tricoelodus – type locality for genus
 * † Tricoelodus
 * † Tricoelodus bicuspidatus – type locality for species
 * † Tricoelodus bicuspidatus
 * † Tricolpites
 * † Tricolpites bibaculatus
 * † Tricolpites communis – type locality for species
 * † Tricolpites communis
 * † Tricolpites cummunis
 * † Tricolpites gillii
 * † Tricolpites lillie
 * † Tricolpites lumbrerensis
 * † Tricolpites perlongicolpus – or unidentified comparable form
 * † Tricolpites petriellai
 * † Tricolpites reticulata – or unidentified comparable form
 * † Tricolpites reticulata
 * † Tricolpites reticulatus – or unidentified comparable form
 * † Tricolpites reticulatus
 * † Tricolpites sp.
 * † Tricolpites sp. 1informal
 * † Tricolpites sp. 2informal
 * † Tricolpites sp. Ainformal
 * † Tricolpites sp. Binformal
 * † Tricolpites trioblatus
 * † Tricolpites vulgaris
 * † Tricolporites
 * † Tricolporites adelaidensis – or unidentified comparable form
 * † Tricolporites sp. 1informal
 * † Tricolporites sp. 3informal
 * † Tricolporites sp. Ainformal
 * † Tricolporites sp. Binformal
 * † Tricolporites sp. Cinformal
 * † Tricolporites valvatus
 * † Tricosirius – tentative report
 * † Tricosirius patagonica
 * † Trigodon
 * † Trigodon gaudryi
 * † Trigodonops – or unidentified comparable form
 * † Trigodonops sp.
 * † Trigonia
 * † Trigonia sp.
 * † Trigonolophodon
 * † Trigonolophodon modicus – type locality for species
 * † Trigonostylops – type locality for genus
 * † Trigonostylops – tentative report
 * † Trigonostylops
 * † Trigonostylops duplex – type locality for species
 * † Trigonostylops gegenbauri – type locality for species
 * † Trigonostylops sp.
 * † Trigonostylops wortmani – type locality for species
 * † Trigonostylops wortmani – tentative report
 * † Trigonostylops wortmani
 * † Trilete
 * † Trilete perisporiuminformal
 * † Trilites
 * † Trilites fasolae – type locality for species
 * † Trilites fasolae
 * † Trilites parvalatus
 * † Trilites parvallatus
 * † Trilites sp. 2informal
 * † Trilites tuberculiformis
 * † Trilites volkheimerii
 * † Trilobodon – type locality for genus
 * † Trilobodon
 * † Trilobodon brancoi – type locality for species
 * † Trilobodon brancoi
 * † Trilobosporites
 * † Trilobosporites sp.
 * † Trimerostephanos
 * † Trimerostephanos sp.
 * † Trimerostephanos ultimus – type locality for species
 * † Triorites
 * † Triorites minor
 * † Triorites orbiculatus – or unidentified comparable form
 * † Triorites orbiculatus
 * † Triporopollenites
 * † Triporopollenites ambiguus – or unidentified comparable form
 * † Triporopollenites ambiguus
 * † Triporopollenites minor
 * † Triporopollenites parviannulatus
 * † Tripospermum
 * † Tripospermum myrti
 * † Trisaccites
 * † Trisaccites microsaccatum
 * † Trisaccites microsaccatus
 * † Trithyrodinium
 * † Trithyrodinium evittii
 * † Triumfetta
 * † Triumfetta irregulariter-serrata
 * † Trochita – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Trochita
 * † Trochita pileolus
 * † Trochita pileus
 * † Trochus – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Trochus sp. – type locality for species
 * † Trochus sp.
 * † Trophon – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Trophon
 * † Trophon broggii
 * † Trophon cortatus
 * † Trophon geversianum
 * † Trophon harringtoni
 * † Trophon leanzai
 * † Trophon muriciformis
 * † Trophon pallidus
 * † Trophon patagonicus
 * † Trophon piramidensis
 * † Trophon plicatus
 * † Trophon retrorsum
 * † Trophon santacrucensis
 * † Trophon santacruzensis
 * † Trophon sp.
 * † Trophon varians
 * † Trophon vokesae
 * † Tropon
 * † Tropon varians
 * † Trypanites
 * † Trypanites sp.
 * † Tsamnichoria – type locality for genus
 * † Tsamnichoria cabrerai – type locality for species
 * † Tuberculatosporites
 * † Tuberculatosporites parvus – type locality for species
 * † Tuberculatosporites parvus
 * † Tuberculatosporites sp.
 * † Tuberculodinium
 * † Tuberculodinium vancampoae
 * † Tubulifloridites
 * † Tubulifloridites antipodica
 * † Tubulifloridites pleistocenicus
 * † Tubulifloridites simplis
 * † Tubulifloridites sp.
 * † Tubulifloridites viteauensis
 * † Tudicula
 * † Tudicula sp.
 * † Tupinambis – type locality for genus
 * † Tupinambis
 * † Tupinambis merianae – or unidentified comparable form
 * † Tupinambis sp. – type locality for species
 * † Tupinambis sp.
 * † Turbonilla – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Turbonilla
 * † Turbonilla cuevensis
 * † Turbonilla eopatagonica
 * † Turbonilla observationis
 * † Turbonilla smithi
 * † Turbonilla sp.
 * † Turbonilla uruguayensis
 * † Turris
 * † Turris crassatina
 * † Turritella – tentative report
 * † Turritella – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Turritella
 * † Turritella alzolai
 * † Turritella ambulacrum – or unidentified related form
 * † Turritella ambulacrum – or unidentified comparable form
 * † Turritella ambulacrum
 * † Turritella ameghinoi – or unidentified related form
 * † Turritella ameghinoi
 * † Turritella breantania
 * † Turritella broggii
 * † Turritella cazodoriana
 * † Turritella figueirasi
 * † Turritella flechensis
 * † Turritella hauthali
 * † Turritella heimi
 * † Turritella hodsoni
 * † Turritella malaspina – or unidentified related form
 * † Turritella malaspina
 * † Turritella patagonica
 * † Turritella piramidesia
 * † Turritella pseudohauthalli
 * † Turritella rustica – or unidentified related form
 * † Turritella rustica
 * † Turritella soaresana – or unidentified comparable form
 * † Turritella sp.
 * † Typha
 * † Typha sp.
 * † Typotheriopsis
 * † Typotheriopsis internum
 * † Typotheriopsis sp.
 * † Typotherium
 * † Typotherium cristatum
 * † Ulminium
 * † Ulminium atlanticum
 * † Ulminium mucilaginosum
 * † Ulmoideipites
 * † Ulmoideipites patagonicus – type locality for species
 * † Ulmoideipites patagonicus
 * † Ultrapithecus – type locality for genus
 * † Ultrapithecus
 * † Ultrapithecus robustus – type locality for species
 * † Ultrapithecus rutilans – type locality for species
 * † Ultrapithecus rutilans – or unidentified comparable form
 * † Ultrapithecus rutilans
 * † Undulatisporites
 * † Undulatisporites sp.
 * † Urocerus
 * † Urocerus patagonicus – type locality for species
 * † Urosalpinx – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Urosalpinx archipatagonica
 * † Urosalpinx cossmanni
 * † Urosalpinx ortmanni
 * † Urotherium – or unidentified comparable form
 * † Urotherium
 * † Urotherium interundatum
 * † Urotherium sp.
 * † Utaetus – tentative report
 * † Utaetus – or unidentified comparable form
 * † Utaetus
 * † Utaetus buccatus – type locality for species
 * † Utaetus buccatus – tentative report
 * † Utaetus buccatus
 * † Utaetus deustus – type locality for species
 * † Utaetus deustus
 * † Utaetus laevus – type locality for species
 * † Utaetus lenis – type locality for species
 * † Utaetus lenis
 * † Utaetus sp.
 * † Valdesia
 * † Valdesia aequistriata
 * † Valdesia astraensis
 * † Valdesia collaris – or unidentified related form
 * † Valdesia collaris
 * † Valdesia conica
 * † Valdesia cuevensis
 * † Valdesia dalli
 * † Valdesia diametralis
 * † Valdesia golfina
 * † Valdesia schucherti
 * † Valdesia seudocollaris – or unidentified related form
 * † Valdesia seudocollaris
 * † Vallehermosomys – type locality for genus
 * † Vallehermosomys – tentative report
 * † Vallehermosomys mazzonii – type locality for species
 * † Vallehermosomys merlinae – type locality for species
 * † Vassallia
 * † Vassallia sp.
 * † Venericardia – tentative report
 * † Venericardia
 * † Venericardia abasolensis
 * † Venericardia ameghinorum
 * † Venericardia austroplata
 * † Venericardia camachoi
 * † Venericardia carrerensis – type locality for species
 * † Venericardia feruglioi
 * † Venericardia iheringi
 * † Venericardia leonensis
 * † Venericardia sp.
 * † Venus
 * † Venus elongata
 * † Venus meridionalis
 * † Venus munsteri
 * † Venus ovallei – or unidentified related form
 * † Verconella – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Verconella iheringi
 * † Verrucingulatisporites
 * † Verrucingulatisporites sp.
 * † Verrucosisporites – or unidentified comparable form
 * † Verrucosisporites
 * † Verrucosisporites kopukuensis
 * † Verrucosisporites sp.
 * † Verrucosisporites sp. 1informal
 * † Verrucosisporites sp. 2informal
 * † Verrustephanoporites
 * † Verrustephanoporites simplex
 * † Vetelia
 * † Vetelia perforata
 * † Vetelia puncta
 * † Vetelia sp.
 * † Victorlemoineia – tentative report
 * † Victorlemoineia
 * † Victorlemoineia emarginata – type locality for species
 * † Victorlemoineia labyrinthica – type locality for species
 * † Victorlemoineia longidens – type locality for species
 * † Victorlemoineia longidens
 * † Victorlemoineia sp.
 * † Vicugna
 * † Vicugna vicugna
 * † Villaresia
 * † Villaresia congonhifolia – type locality for species
 * † Vitrenella
 * † Vitrenella pardelensis
 * † Voluta
 * † Voluta sp.
 * † Volvulella
 * † Volvulella cannada
 * † Volvulella phoinicoides
 * † Waincophis – type locality for genus
 * † Waincophis
 * † Waincophis australis – type locality for species
 * † Waincophis australis
 * † Waincophis sp.
 * † Wainka – type locality for genus
 * † Wainka – tentative report
 * † Wainka tshotshe – type locality for species
 * † Wainka tshotshe
 * † Wawelia – type locality for genus
 * † Wawelia gerholdi – type locality for species
 * † Weinmannioxylon – type locality for genus
 * † Weinmannioxylon
 * † Weinmannioxylon multiperforatum – type locality for species
 * † Weinmannioxylon pluriradiatum – type locality for species
 * † Willidewu
 * † Willidewu estaparius
 * † Willidewu esteparius
 * † Windhausenia
 * † Windhausenia delacroixi
 * † Windhausenia sp.
 * † Woodburnodon
 * † Woodburnodon sp.
 * † Xanthilites
 * † Xanthilites gerthi
 * † Xenocardia – type locality for genus
 * † Xenocardia diversidens – type locality for species
 * † Xenodontomys
 * † Xenodontomys ellipticus
 * † Xenodontomys elongatus
 * † Xenostephanus – type locality for genus
 * † Xenostephanus chiottii – type locality for species
 * † Xesmodon – type locality for genus
 * † Xesmodon
 * † Xesmodon langi – type locality for species
 * † Xesmodon prolixus – type locality for species
 * † Xiphuroides
 * † Xiphuroides uquiensis
 * † Xotodon
 * † Xotodon doellojuradi
 * † Xotodon foricurvatus
 * † Xotodon sp.
 * † Xylechimys – type locality for genus
 * † Xylechimys obliquus – type locality for species
 * † Xymene
 * † Xymene dautzembergi
 * † Xymene elegans
 * † Xymenopsis
 * † Xymenopsis buccinea
 * † Xymenopsis flechensis
 * † Xymenopsis michelii
 * † Xymenopsis muriciformis
 * † Xymenopsis peninsularis
 * † Xymenopsis quenseli
 * † Xyophorus
 * † Xyophorus bandesioi – or unidentified related form
 * † Yaminuechelys – tentative report
 * † Yaminuechelys
 * † Yaminuechelys maior – type locality for species
 * † Yaminuechelys maior – or unidentified comparable form
 * † Yaminuechelys maior
 * † Yolida
 * † Yolida patagonia – type locality for species
 * † Zaedyus – tentative report
 * † Zaedyus
 * † Zaedyus pichiy – or unidentified comparable form
 * † Zaedyus pichiy
 * † Zaedyus sp.
 * † Zamia – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Zamia
 * † Zamia australis – type locality for species
 * † Zamia tertiaria
 * † Zeacuminia
 * † Zeacuminia quemadensis
 * † Zeacuminia santacrucensis
 * † Zeadmete
 * † Zeadmete ameghinoi
 * † Zelandiella – tentative report
 * † Zelandiella
 * † Zelandiella cossmanni – tentative report
 * † Zelandiella golfina
 * † Zemacies
 * † Zemacies crassatina – or unidentified comparable form
 * † Zeugrhabdotus
 * † Zeugrhabdotus sigmoides
 * † Zilchogyra
 * † Zilchogyra sp. Ainformal
 * † Zilchogyra sp. Binformal
 * † Ziziphus
 * † Ziziphus sp.
 * † Zizyphus
 * † Zizyphus chubutensis – type locality for species
 * † Zlivisporis
 * † Zlivisporis sp. 1informal
 * † Zlivisporis sp. 2informal
 * † Zonotrichia
 * † Zonotrichia robusta – type locality for species
 * † Zygnema – or unidentified related form
 * † Zygnema
 * † Zygnema sp.
 * † Zygnema sp. Tipo Ainformal
 * † Zygnema sp. Tipo Binformal
 * † Zygochlamys – report made of unidentified related form or using admittedly obsolete nomenclature
 * † Zygochlamys
 * † Zygochlamys actinodes
 * † Zygochlamys geminata
 * † Zygochlamys jorgensis
 * † Zygochlamys patagonica
 * † Zygochlamys sp.
 * † Zygolestes
 * † Zygolestes paranensis
 * † Zygolestes tatei – type locality for species
 * † Zygolestes tatei