List of the Paleozoic life of Nevada

This list of the Paleozoic life of Nevada contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Nevada and are between 538.8 and 252.17 million years of age.

A

 * †Aatocrinus
 * †Aatocrinus permicus
 * †Acaciapora
 * †Acaciapora duncanae – type locality for species
 * †Acanthocladia
 * †Acanthopecten
 * †Acanthopecten coloradoensis
 * Acanthopyge fossil cropped.png †[[Acanthopyge]]
 * †Achlysopsis
 * †Achlysopsis hemitora
 * †Achlysopsis liokata
 * †Aciculolenus
 * †Aciculolenus peculiaris
 * †Acidiphorus
 * †Acidiphorus brevis – or unidentified comparable form
 * †Acidiphorus lineotuberculatus
 * †Acidiphorus pseudobathurus
 * †Aclisina
 * †Acmarhachis
 * †Acmarhachis acuta
 * †Acmarhachis acutus
 * †Acmarhachis typicalis
 * †Acodus
 * †Acodus auritus – or unidentified comparable form
 * †Acontiodus
 * †Acontiodus alveolaris
 * †Acosarina
 * †Acosarina mesoplatys
 * †Acratia
 * †Acratia gassanovae – or unidentified related form
 * †Acratia silincula – or unidentified related form
 * †Acratia subelongata
 * †Acrocyathus
 * †Acrospirifer
 * †Acrospirifer murchisoni – or unidentified related form
 * †Acrothyra
 * †Actinostroma
 * †Acutichiton
 * †Acutichiton gracilis – type locality for species
 * †Acutichiton nevadensis – type locality for species
 * †Adamsoceras
 * †Adamsoceras isabelae
 * †Adelograptus
 * †Adelograptus antiquus
 * †Aechmina – tentative report
 * †Aesopomum
 * †Aesopomum varistriatus – or unidentified comparable form
 * †Agathammina
 * †Agnostocrinus
 * †Agnostocrinus typus
 * †Agnostotes
 * †Agnostotes clavata – or unidentified comparable form
 * †Agnostus
 * Gasteropods - Ammonites - Agoniatites obliquus.JPG †[[Agoniatites]]
 * †Alaskospira
 * †Albertella
 * †Albertella aspinosa
 * †Albertella eiloitys
 * †Albertella fritizi – type locality for species
 * †Albertella fritzi – type locality for species
 * †Albertella highlandensis – type locality for species
 * †Albertella judithi
 * †Albertella lata – type locality for species
 * †Albertella schenki – type locality for species
 * †Albertella spectrensis
 * †Albertellina
 * †Albertellina aspinosa
 * †Albertelloides – type locality for genus
 * †Albertelloides kitae – type locality for species
 * †Albertelloides kitai – type locality for species
 * †Albertelloides mischi – type locality for species
 * †Albertelloides pandispinata – type locality for species
 * †Albertelloides rectimaginatus
 * †Albertelloides rectimarginatus
 * †Allorhynchus
 * †Allorhynchus heteropsis
 * †Allorisma – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Allosocrinus – tentative report
 * †Alokistocare
 * †Alokistocare alta – type locality for species
 * †Alokistocarella
 * †Alokistocarella brighamensis – or unidentified comparable form
 * †Altiocculus
 * †Altiocculus drumensis
 * †Alveolites
 * †Amaurotoma
 * †Amaurotoma zappa – type locality for species
 * †Ambocoelia
 * †Ambocoelia lobata – tentative report
 * †Ambocoelia recidiva
 * †Ambothyris
 * †Amecephalites – type locality for genus
 * †Amecephalites sundbergi – type locality for species
 * †Amecephalus
 * †Amecephalus arrojosensis
 * †Amecephalus laticaudum
 * †Amorphognathus
 * †Amorphognathus ordovicicus
 * †Amphilichas
 * †Amphilichas minganensis – or unidentified related form
 * †Amphipora
 * †Amphiscapha
 * †Amphiscapha intermedius – type locality for species
 * †Amphiscapha proxima
 * †Amplexizaphrentis
 * †Amplexoides
 * †Amplexoides radicosi – tentative report
 * †Amplifallotaspis
 * †Amplifallotaspis keni
 * †Ampyx – tentative report
 * †Ampyx
 * †Ampyxina
 * †Ampyxoides
 * †Ampyxoides occipitalis – or unidentified comparable form
 * †Anabarella
 * †Anabarella chelata – type locality for species
 * †Anabolotreta
 * †Anabolotreta glabra – type locality for species
 * †Anabolotreta mogota – type locality for species
 * † Ananias
 * †Ananias nevadensis
 * †Ananias seminudum – type locality for species
 * †Anaphilicas – tentative report
 * †Anastrophia
 * †Anastrophia magnifica – or unidentified comparable form
 * †Anataphrus
 * †Anataphrus martinensis
 * †Anataphrus spurius – or unidentified comparable form
 * †Ancillotoechia
 * †Ancillotoechia aptata
 * †Ancillotoechia pahranagatensis
 * †Anechocephalus
 * †Anechocephalus spinosus
 * †Anechocephalus trigranulatus
 * †Anemonaria
 * †Anemonaria delicatula
 * Angulocellularia
 * †Angulotreta
 * †Anisocyamus
 * †Anisopyge
 * †Anisotrypa
 * †Anisotrypella
 * †Anolotichia
 * AnomalocarisDinoMcanb.jpg †[[Anomalocaris]]
 * †Anomalorthis
 * †Anomalorthis fascicostatus – or unidentified comparable form
 * †Anomalorthis fascicostellatus
 * †Anomalorthis lonensis
 * †Anomalorthis nevadensis
 * †Anomalorthis oklahomensis
 * †Anomalorthis resoi
 * †Anomalorthis utahensis
 * †Anomphalus
 * †Anomphalus jaggerius – type locality for species
 * †Anoplia
 * †Anoplia elongata
 * †Anostylostroma
 * †Antagmus
 * †Antagmus arenosus – type locality for species
 * †Anthaspidella
 * †Anthaspidella clintoni
 * †Anthraconeilo – tentative report
 * †Anthracospirifer
 * †Anthracospirifer bifurcatus – or unidentified comparable form
 * †Anthracospirifer birdspringensis
 * †Anthracospirifer curvilateralis
 * †Anthracospirifer newberryi
 * †Anthracospirifer occiduus
 * †Anthracospirifer opimus
 * †Anthracospirifer pellaensis – or unidentified related form
 * †Anticostia
 * †Anticostia fastigata
 * †Anticostia fastigiata
 * †Anticostia festigata
 * †Anticostia lata
 * †Anticostia macgregorae
 * †Anticostia tenuissima
 * †Anticostia thorsteinssoni
 * †Anticostia uniformis
 * †Antiquatonia
 * †Antiquatonia coloradoensis
 * †Antiquatonia elyensis
 * †Antiquatonia hermosana
 * †Antiquatonia morrowensis
 * †Antiquatonia portlockianus
 * †Antirhynchonella
 * †Antistrix
 * †Antistrix invicta
 * †Apachella
 * †Apachia
 * †Apachia butlerensis
 * †Aparchites
 * †Apatokephalus
 * †Apatokephalus finalis – tentative report
 * †Apatolichas
 * †Apatolichas jukesi – or unidentified comparable form
 * †Aphelaspis
 * †Aphelaspis brachyphasis – type locality for species
 * †Aphelaspis buttsi
 * †Aphelaspis haguei
 * †Aphelaspis subditus
 * †Aphelotoxon
 * †Aphelotoxon acuminata
 * †Aphelotoxon marginata
 * †Aphelotoxon punctata
 * †Apheoorthis
 * †Aphroidophyllum
 * †Aphroidophyllum inceptor – type locality for species
 * †Aploconus
 * †Aploconus lafustei – type locality for species
 * †Aporthophyla
 * †Aporthophyla typa
 * †Aporthophyla typica
 * †Appendispinograptus
 * †Appendispinograptus leptothecalis
 * †Appendispinograptus longispinus
 * †Appendispinograptus supernus
 * †Arceodomus
 * †Arceodomus glabrata
 * †Arceodomus langenheimi
 * †Archaediscus
 * †Archaediscus krestovnikovi
 * †Archaediscus moelleri – or unidentified loosely related form
 * Archaeocidaris brownwoodensis MHNT.jpg †[[Archaeocidaris]]
 * †Archaeocothurnus
 * †Archaeocothurnus goshutensis – type locality for species
 * †Archaeocyathus
 * †Archaeocyathus atlanticus – or unidentified comparable form
 * †Archaeophiomusium
 * †Archaeophiomusium bispinosum – type locality for species
 * †Archaeophiomusium burrisi
 * †Archaeorthis
 * †Archaeorthis costellatus
 * †Archaeorthis elongata
 * †Archaeorthis elongatus
 * †Archaeoscyphia
 * †Archaeoscyphia bassleri – type locality for species
 * †Archaeoscyphia eganensis – type locality for species
 * †Archaeoscyphia pannosa – type locality for species
 * †Archaeoscyphia pulchra
 * †Archaeoscyphia rossi – type locality for species
 * †Archaeosycon
 * †Archaeosycon copulatus
 * †Archinacella – tentative report
 * †Arcochiton
 * †Arcochiton richardsoni – type locality for species
 * †Areostrophia
 * †Areostrophia rara
 * †Arroyocrinus
 * †Arroyocrinus brachiatus
 * †Arroyocrinus popenoei
 * †Arrythmocricus
 * †Arrythmocricus mcdamensis
 * †Asaphellus
 * †Asaphellus eudocia – or unidentified comparable form
 * †Asaphellus riojanus
 * †Asarcophyllum
 * †Asarcophyllum ramosum
 * †Ascopora
 * †Asgardaspira
 * †Asgardaspira measuresae
 * †Asgardaspira yochelsoni
 * †Asphaltina
 * †Aspidagnostus
 * †Aspidagnostus laevis – type locality for species
 * †Aspidagnostus rugosus
 * †Astartella
 * †Astartella subquadrata
 * †Asthenophyllum
 * †Asthenophyllum orthoseptatum – tentative report
 * †Astreptodictya
 * †Astroproetus
 * †Asymphylotoechia
 * †Asymphylotoechia nolani
 * †Atelelasma
 * †Atelelasma primotica
 * †Athabaskia
 * †Athyridacid
 * †Athyris
 * †Athyris angelica
 * †Athyris angelicoidea
 * †Athyris lamellosa
 * †Atopocystis – type locality for genus
 * †Atopocystis mucronata – type locality for species
 * †Atrypa
 * †Atrypa nevadana
 * †Atrypa parva – or unidentified comparable form
 * †Atrypa reticularis
 * †Atrypina
 * †Atrypina erugata
 * †Atrypina rugata
 * †Atrypina simpsoni – type locality for species
 * †Atrypoidea
 * †Aulacoparia
 * †Aulacoparia venta – or unidentified comparable form
 * †Aulocystis
 * †Aulopora
 * †Auloprotonia
 * †Australispongia
 * †Australispongia compressa – type locality for species
 * †Australophyllum – tentative report
 * Aviculopecten subcardiformis01.JPG †[[Aviculopecten]]
 * †Aviculopecten affinis
 * †Aviculopecten eurekensis
 * †Aviculopecten haguei
 * †Aviculopecten pintoensis
 * †Aviculopinna
 * †Aviculopinna consimilis – or unidentified comparable form
 * †Aviculopinna peracuta – tentative report
 * †Avonia
 * †Axofistulophyllum
 * †Axofistulophyllum conulus – tentative report
 * †Axofistulophyllum convexum

B

 * †Bactroceras
 * †Bactroceras angustisiphonatum
 * Bairdia
 * †Bairdia confragosaeformis – or unidentified comparable form
 * †Bairdia fabaeformis – or unidentified comparable form
 * †Bairdia manifesta
 * †Bairdiacypris
 * †Bairdiacypris anteroangulosa
 * †Bairdiacypris martinae
 * †Bairdiacypris quarziana
 * †Bairdiocypris
 * †Bakevellia
 * †Ballardina
 * †Ballardina simplex
 * †Baltoceras
 * †Baltoceras striatum – type locality for species
 * †Basilicus
 * †Basilicus mackeei
 * †Basilicus mckeei
 * †Batenevia
 * †Bathymyonia
 * †Bathymyonia nevadensis – type locality for species
 * †Bathymyonia type locality for species A – informal
 * Bathynotus holopyga 13thAnnRepNYStateCabNatHis.jpg †[[Bathynotus]]
 * †Bathynotus holopygus
 * †Bathyocos
 * †Bathyocos housensis
 * †Bathyurellus
 * †Bathyurellus feitleri
 * †Bathyuriscus
 * †Bathyuriscus petalus
 * †Bathyurus
 * †Bathyurus acutus
 * †Bathyurus extans – or unidentified comparable form
 * †Bathyurus nevadensis
 * †Bathyurus sunbloodensis
 * †Batostomellina
 * †Beecheria
 * †Bekena
 * †Bellazona
 * †Bellazona bella
 * †Bellefontia
 * Bellerophon umbilicalis.jpg †[[Bellerophon (genus)|Bellerophon]]
 * †Bellerophon deflectus
 * †Bellerophon needlensis – type locality for species
 * †Bellerophon nevadensis
 * †Belodella
 * †Belodina
 * †Belodina confluens
 * †Belodina disponsa – or unidentified comparable form
 * †Belodina monitorensis
 * †Belodina ornata – or unidentified comparable form
 * †Benthamaspis
 * †Benthamaspis sera
 * †Bergaueria – tentative report
 * †Besselodus
 * †Besselodus borealis
 * †Beyrichia
 * †Bicarina
 * †Bicarina type locality for species A – informal
 * Biceratops cropped.png †[[Biceratops]] – type locality for genus
 * †Biceratops nevadensis – type locality for species
 * †Biciragnostus
 * †Biciragnostus viator
 * †Bienvillia
 * †Bienvillia papulosa
 * †Bifida – tentative report
 * †Bighornia
 * † Bija
 * †Bilobia
 * †Bimuria
 * †Blastoidocrinus
 * †Blastoidocrinus nevadensis
 * †Blosyropsis
 * †Blountia
 * †Blountia bristolensis
 * †Bohemograptus
 * †Bohemograptus bohemicus
 * †Bojothyris
 * †Bolbocephalus – tentative report
 * †Bolbolenellus
 * †Bolbolenellus brevispinus – type locality for species
 * †Bonnia
 * †Bonnia caperata – type locality for species
 * †Bonnia copia – type locality for species
 * †Botomaella
 * †Boucotspira
 * †Boucotspira antelopensis
 * †Boultonia
 * †Boultonia heezeni – type locality for species
 * †Brachyprion
 * †Brachyprion geniculata
 * †Brachyprion mirabilis
 * †Brachyspirifer
 * †Brachyspirifer pinyonoides – type locality for species
 * †Bradyfallotaspis
 * †Bradyphyllum
 * †Bradyphyllum gracilium – type locality for species
 * †Bransonia
 * †Brasilioproductus
 * †Brasilioproductus welleri – or unidentified comparable form
 * †Brevibelus
 * †Brevibelus breviformis
 * †Breviphrentis
 * †Breviphrentis invaginata
 * †Breviphrentis invaginatus
 * †Breviphrentis johnsoni
 * †Breviphrentis kirki
 * †Breviphrentis magna
 * †Briantia
 * †Briantia mulleri
 * †Bristolia
 * †Bristolia anteros
 * †Bristolia bristolensis
 * †Bristolia fragilis
 * †Broeggeria – tentative report
 * †Bromella
 * †Bromella veritas
 * †Brongniartella
 * †Brunsia
 * †Budnaniella
 * †Budnaniella shenandoense – or unidentified comparable form
 * Trilobite - Bumastus reconstruction 3d.jpg †[[Bumastus]]
 * †Buxtonia
 * †Buxtonia websteri – type locality for species
 * †Bynumina
 * †Bynumina globosa
 * †Bythicheilus
 * Bythocypris

C

 * †Caborcella
 * †Caborcella clinolimbata – type locality for species
 * †Caborcella ganosa
 * †Caborcella granosa
 * †Caborcella pseudaulax
 * †Caborcella reducta
 * †Cabrieroceras
 * †Cabrieroceras crispiforme – or unidentified related form
 * †Calathium
 * †Calcispheara
 * †Calcitornella
 * †Calcivertella
 * †Caliendrum – or unidentified related form
 * †Calliprotonia
 * †Calliprotonia spinula – type locality for species
 * †Calstevenus – type locality for genus
 * †Calstevenus arcturus – type locality for species
 * †Calycalyptella
 * †Calycocoelia
 * †Calycocoelia murella – type locality for species
 * †Calycocoelia typicalis
 * †Calygirtyoceras
 * †Calygirtyoceras arcticum
 * †Calymene
 * †Calyptaulax
 * †Calyptaulax callirachis – or unidentified comparable form
 * †Camarotoechia
 * †Camarotoechia modica – or unidentified comparable form
 * †Camarotoechia pahranagatensis
 * †Camarotoechia vesper
 * †Camerella
 * Canadaspis perfecta.JPG †[[Canadaspis]]
 * †Canadiphyllum
 * †Cancelloceras
 * †Cancelloceras elegans – or unidentified comparable form
 * †Cancrinella
 * †Caninia
 * †Caninia elkoensis – type locality for species
 * †Caninia goldcreekensis – type locality for species
 * †Caninia torquia
 * †Caninostrotion
 * †Canthylotreta
 * †Canthylotreta crista – type locality for species
 * †Cardiomorpha
 * †Carinagypa
 * †Carinamala
 * †Carinamala longispina – type locality for species
 * †Carlinastraea
 * †Carlinastraea halysitoides
 * †Carolinites
 * †Carolinites ekphymosus – or unidentified comparable form
 * †Carolinites genacinaca
 * †Carolinites killaryensis – or unidentified comparable form
 * †Carolinites sibiricus
 * †Carrickia
 * †Cassidirostrum
 * †Cassidirostrum eurekaensis – or unidentified comparable form
 * †Cassidirostrum vexans – type locality for species
 * †Catazona – type locality for genus
 * †Catazona rudilirata – type locality for species
 * †Catazone
 * †Catazone nevadana – type locality for species
 * †Catenipora
 * †Catoraphiceras
 * †Catoraphiceras foerstei
 * †Cavusgnathus
 * †Cavusgnathus gigantus
 * †Cavusgnathus lautus
 * †Cavusgnathus spathus
 * Cedaria minor CRF.jpg †[[Cedaria]]
 * †Cedaria brevifrons – type locality for species
 * †Celonocrinus
 * †Celonocrinus expansus
 * †Cenorhynchia
 * †Cenorhynchia type locality for species A – informal
 * †Cenorhynchia type locality for species B – informal
 * †Centropleura
 * †Ceratocephala – tentative report
 * †Ceratoikiscum – tentative report
 * †Ceratopea
 * †Ceratopea latiumbilicata – or unidentified comparable form
 * †Ceratopea lemonei
 * †Ceraurinella
 * †Ceraurinus
 * †Ceraurinus icarus
 * Ceraurus fossil cropped.png †[[Ceraurus]]
 * †Cernuolimbus
 * †Cernuolimbus depressus
 * †Cernuolimbus granulosus
 * †Cernuolimbus laevifrons
 * †Cernuolimbus orygmatos
 * †Cernuolimbus semigranulosus
 * †Chaetetes
 * †Chaetetes milleporaceus
 * †Chalaroschwagerina
 * †Chalaroschwagerina ampla – type locality for species
 * †Chalaroschwagerina eximia – type locality for species
 * †Chalaroschwagerina formosa – type locality for species
 * †Chalaroschwagerina globularis – type locality for species
 * †Chalaroschwagerina inflata – type locality for species
 * †Chalaroschwagerina solita – type locality for species
 * †Chalaroschwagerina tumentis
 * ChancelloriaEros-Detail NaturhistorischesMuseum Nov14-10.jpg †[[Chancelloria]]
 * †Chancia
 * †Chancia maladensis – tentative report
 * †Chancia venusta
 * †Chancia venuxa – or unidentified comparable form
 * †Chanciaopsis
 * †Chanciaopsis heteromorphos
 * †Charchaqia
 * †Charchaqia norini
 * †Chaulistomella – tentative report
 * †Chazydictya
 * †Cheilocephalus
 * †Cheilocephalus brachyops
 * †Cheilocephalus brevilobus
 * †Cheilocephalus granulosus
 * †Chonetes
 * †Chonetes euampygus
 * †Chonetes logani
 * †Choperella
 * †Choperella jeanette
 * †Choristites
 * †Choristites orbitus – type locality for species
 * †Cibolocrinus
 * †Cibolocrinus typus
 * †Cladochonus
 * †Cladochonus nevadensis – type locality for species
 * †Cladochonus shawi – type locality for species
 * Cladodont-tooth-cladodus-belifer.jpg †[[Cladodus]]
 * †Cladopora
 * †Clathronema
 * †Clathronema batteni – type locality for species
 * †Clathrospira
 * †Cleiothyrdina
 * †Cleiothyrdina orbicularis
 * †Cleiothyridina
 * †Cleiothyridina angelicoides – or unidentified comparable form
 * †Cleiothyridina ciriacksi
 * †Cleiothyridina deroissyi
 * †Cleiothyridina elegans
 * †Cleiothyridina milleri
 * †Cleiothyridina orbicularis
 * †Cleiothyridina pecosii
 * †Cleiothyridina pecossi – or unidentified comparable form
 * †Cleiothyridina reticulata
 * †Cleiothyridina type locality for species A – informal
 * †Cleiothyridina type locality for species B – informal
 * †Clelandia – tentative report
 * †Climacammina
 * †Climacammina patula – or unidentified loosely related form
 * †Climacammina prisca – or unidentified loosely related form
 * †Climacograptus
 * †Climacograptus caudatus
 * †Climacograptus hastatus
 * †Climacograptus innotatus
 * †Climacograptus phyllophorus – or unidentified comparable form
 * †Climacograptus tridentatus
 * †Climacograptus tubuliferus
 * †Climaconus
 * †Clinopistha
 * †Clinopistha levis
 * †Clisiophyllum
 * †Clisospira
 * Cloacaspis.jpg †[[Cloacaspis]]
 * †Cloacaspis tesselata
 * †Clonopora – tentative report
 * †Cnemidactis
 * †Cnemidactis macroadambulacralatas – type locality for species
 * †Coelospira
 * †Coelospira concava
 * †Coelospira pseudocamilla – type locality for species
 * †Colaptomena
 * †Coledium
 * †Coledium therum
 * †Coleoloides
 * †Coleoloides inyoensis – type locality for species
 * †Colinispongia
 * †Colinispongia regularis – type locality for species
 * †Colpites
 * †Columnaria
 * †Comanchia
 * †Comanchia minus
 * Compositafossil.jpg †[[Composita]]
 * †Composita apheles – or unidentified comparable form
 * †Composita gibbosa
 * †Composita mexicana
 * †Composita mira
 * †Composita ovata
 * †Composita parasulcata
 * †Composita subquadrata
 * †Composita subtilita
 * †Composita trilobata
 * †Composita trilobita
 * †Composita trinuclea
 * †Compsonema – type locality for genus
 * †Compsonema fragile – type locality for species
 * †Conchidium
 * †Conchopeltus
 * †Conocardium
 * †Conotoma
 * †Conotoma aurora
 * †Conotreta
 * Constellaria polystomella Liberty Formation.jpg †[[Constellaria]]
 * †Contignatiospongia – type locality for genus
 * †Contignatiospongia nevadensis – type locality for species
 * †Conularia
 * †Cooleyella
 * †Cooleyella duffini
 * †Coosia
 * †Coosia longocula – type locality for species
 * †Cordillerastraea
 * †Cordillerastraea complexa
 * †Cordillerastraea nevadaensis – type locality for species
 * †Cordillerastraea nevadensis
 * †Cordylodus
 * †Cordylodus angulatus
 * †Cordylodus intermedius
 * †Cordylodus lindstomi
 * †Cordylodus proavus
 * †Cornuodus
 * Cornuspira
 * †Cornwallatia – type locality for genus
 * †Cornwallatia tabularia – type locality for species
 * †Cortezorthis
 * †Cortezorthis cortezensis – type locality for species
 * †Corydylodus
 * †Corynexochides
 * †Corynexochides prolatus
 * †Corynexochoides
 * †Corynexochoides prolatus
 * †Costatumulus
 * †Costatumulus altissima
 * †Costellarina
 * †Costellarina kaasai
 * †Costellarina plasi
 * †Costipelagiella
 * †Costipelagiella nevadense – type locality for species
 * †Costispirifer
 * †Cothurnocysts
 * †Cothurnocysts saukia – type locality for species
 * †Cranaena
 * †Crassialveolites
 * †Crassialveolites dubatalovi – or unidentified comparable form
 * †Crassifimbra
 * †Crassifimbra walcotti
 * †Cravenoceras
 * †Cravenoceras friscoense
 * †Crenispirifer – tentative report
 * †Crimites
 * †Crimites elkoensis – type locality for species
 * †Criteriognathus
 * †Criteriognathus eurekaensis
 * †Crurithyris
 * †Crurithyris calendae
 * †Crurithyris expansa
 * †Crurithyris fissa – type locality for species
 * †Crurithyris planoconvexa
 * †Crurithyris wampensis
 * †Cryptolithoides
 * †Cryptolithoides fittsi
 * †Cryptolithoides reticulatus
 * †Cryptolithus
 * †Cryptophyllus
 * †Ctenalosia
 * †Ctenalosia fixata
 * †Ctenodonta
 * †Culumbodina
 * †Culumbodina occidentalis
 * †Culumbodine
 * †Culumbodine penna
 * †Cuparius
 * †Cuparius cardilatus
 * †Curtoceras
 * †Cyathaxonia
 * †Cyathophycus
 * †Cyathophycus pseudoreticulatus – type locality for species
 * †Cyathophycus reticulatus – tentative report
 * †Cyathophyllum
 * †Cyathophyllum eurekaense
 * †Cybeloides
 * †Cybelopsis
 * †Cybelurus
 * †Cybelurus halo
 * †Cymbidium
 * †Cypricardella
 * †Cypricardella connata
 * †Cypricardella striata – or unidentified related form
 * †Cypricardinia
 * †Cypricardinia moorefieldana – or unidentified related form
 * †Cyptendoceras
 * †Cyptendoceras kirki – type locality for species
 * †Cyptendoceras rhythmicum – type locality for species
 * †Cyrtia
 * †Cyrtina
 * †Cyrtina caroline
 * †Cyrtina neogenes
 * †Cyrtina varia – or unidentified comparable form
 * †Cyrtinaella
 * †Cyrtinaella causa – type locality for species
 * †Cyrtinoides
 * †Cyrtinoides septata
 * †Cyrtoniodus
 * †Cyrtoniodus flexuosus
 * †Cyrtonotella
 * †Cyrtonotella fasciculata – or unidentified related form
 * †Cyrtorostra
 * Cyrtospirifer verneuili duo.jpg †[[Cyrtospirifer]]
 * †Cyrtospirifer breviposticus
 * †Cyrtospirifer portae – or unidentified comparable form
 * †Cyrtospirifer whitneyi
 * †Cyrtothoracoceras
 * †Cystiphylloides
 * †Cystodictya
 * †Cytherellina
 * †Cytherellina obusa

D

 * †Dactyletes
 * †Dactylogonia
 * †Dactylogonia vespertina
 * †Dactylotreta
 * †Dactylotreta elegantula – type locality for species
 * †Dalejina
 * SilurianTrilobite.jpg †[[Dalmanites]]
 * †Dapsilodus
 * †Dapsilodus obliquicostatus
 * †Daraelites
 * †Daraelites leonardensis
 * †Davidsonia
 * †Davidsonia antelopensis
 * †Deceptrix
 * †Dechenella
 * †Decoranewsomites
 * †Decoranewsomites angelicus
 * †Decoriconus
 * †Decoriconus fragilis
 * †Decorospira – type locality for genus
 * †Decorospira rigbyi – type locality for species
 * †Delamarella – type locality for genus
 * †Delamarella breispinaspis
 * †Delamarella brevispinaspis – type locality for species
 * †Delaria
 * †Delaria sevilloidia
 * †Delaria snowi
 * †Dellea – tentative report
 * †Dellea punctata
 * †Delmarella – type locality for genus
 * †Delmarella brevispinaspis – type locality for species
 * †Delocrinus
 * †Delocrinus graphicus – or unidentified related form
 * †Delocrinus vastus
 * †Delthyris
 * †Denayella
 * †Denayella housei – type locality for species
 * Dentalium
 * †Derbyia
 * †Derbyia crassa
 * †Derbyia subcircularis
 * †Derbyia sulca
 * †Derbyia wabaunseensis
 * †Desatrypa
 * †Desatrypa copperi
 * †Desmoinesia
 * †Desmoinesia ingrata
 * †Desmoinesia nana
 * †Desmorthis
 * †Desmorthis costata
 * †Desmorthis crassus
 * †Desmorthis nevadensis
 * †Desmorthis planus
 * †Devonalosia – tentative report
 * †Devonoproductus
 * †Devonoproductus hallanus
 * †Devonoproductus minimus – or unidentified comparable form
 * †Diacanthaspis – tentative report
 * †Dianulites
 * †Diaphragmaphyllum
 * †Diaphragmaphyllum grossum – or unidentified related form
 * †Diaphragmus
 * †Diaphragmus phillipsi
 * †Dicanthopyge
 * †Dicanthopyge convergens
 * †Dicanthopyge quadrata
 * †Dicanthopyge reductus
 * †Dicellograptus
 * †Dicellograptus alector – type locality for species
 * †Dicellograptus anceps
 * †Dicellograptus complanatus
 * †Dicellograptus divaricatus – or unidentified comparable form
 * †Dicellograptus minor
 * †Dicellograptus mirabilis
 * †Dicellograptus ornatus
 * †Dicellograptus sextans
 * †Dicellograptus tumidus
 * †Dicellograptus turgidus
 * †Diceratograptus
 * †Diceratograptus mirus
 * †Diceromyonia
 * †Diceromyonia ignota
 * †Dichognathus
 * †Dichognathus typica
 * †Dichogranthus
 * †Dicoelosia
 * †Dicoelosia biloba
 * †Dicranograptus
 * †Dictyoclostus
 * †Dictyonema
 * †Dictytonina
 * †Dictytonina pannula
 * Didymograptus murchisoni small.jpg †[[Didymograptus]]
 * †Didymograptus artus
 * †Didymograptus protobifidus
 * †Dielasma
 * †Dielasma diabloense – or unidentified comparable form
 * †Dielasma phosphoriense
 * †Dimegelasma
 * †Dimegelasma eurekensis – type locality for species
 * †Dimeropyge – tentative report
 * †Dimeropygiella
 * †Dimeropygiella caudanodosa
 * †Dimeropygiella ovata
 * †Dimorphoceras
 * †Dinorthis
 * †Dinorthis occidentalis
 * †Diparelasma
 * †Diparelasma typicum – or unidentified comparable form
 * †Diplocyathellus
 * Diplograptus simplex.png †[[Diplograptus]]
 * †Diplograptus rarithecatus
 * †Diplograptus rigidus
 * †Diplotrypa
 * †Discomyorthis
 * †Discomyorthis musculosa
 * †Disphyllum
 * †Distacodus
 * †Distacodus symmetricus
 * †Distomodus
 * †Divaricospongia – type locality for genus
 * †Divaricospongia dilata – type locality for species
 * †Dokimocephalus
 * †Dokimocephalus pernasutus
 * †Dolerorthis
 * †Dolerorthis flabellites
 * †Donaldiella
 * †Donaldiella cicelia
 * †Donaldina
 * †Donaldospira
 * †Donaldospira geminocarinata – or unidentified comparable form
 * †Dorlodotia
 * †Dorytreta – tentative report
 * †Drepanodus
 * †Drepanodus subarcuatus
 * †Drepanoistodus
 * †Drepanoistodus deltife
 * †Drepanoistodus suberectus
 * †Droharhynchia
 * †Droharhynchia intermissa
 * †Dunbarella
 * †Dunderbergia
 * †Dunderbergia anyta
 * †Dunderbergia bigranulosa
 * †Dunderbergia brevispina
 * †Dunderbergia calculosa
 * †Dunderbergia nitida
 * †Dunderbergia polybothra
 * †Dunderbergia variagranula
 * †Durhamina
 * †Durhamina cordillerensis – type locality for species
 * †Durhamina moormanensis – type locality for species
 * †Durhamina primitiva – type locality for species
 * †Durhamina richi
 * †Durhamina snyderi – type locality for species
 * †Durhamina sublaeve
 * †Dvorakia
 * †Dyoros
 * †Dyoros nevadaensis – type locality for species
 * †Dyoros type locality for species A – informal
 * †Dyscritella
 * †Dyscritella acanthostylia – type locality for species
 * †Dyticospirifer – type locality for genus
 * †Dyticospirifer mccolleyensis – type locality for species
 * †Dytremacephalus
 * †Dytremacephalus asperaxis
 * †Dytremacephalus granulosus

E

 * †Earlandia
 * †Earlandia vulgaris
 * †Ecculiomphalus
 * †Ecculiomphalus harrisae
 * †Eccyliopterus
 * Echidnina
 * †Echidnina bengstoni – type locality for species
 * †Echinalosia
 * †Echinalosia type locality for species A – informal
 * †Echinaria
 * †Echinaria knighti
 * †Echinaria semipunctata – or unidentified comparable form
 * †Echinauris
 * †Echinauris magna
 * †Echinauris subhorrida – type locality for species
 * †Echinocoelia
 * †Echinocoelia careocamera
 * †Echinocoelia denayensis
 * †Echinocoelia williamsi
 * †Echinoconchus
 * †Echinoconchus biseriatus – or unidentified related form
 * †Echinoconchus elegans
 * †Echinoconchus semipunctatus
 * †Echinoconchus vittatus – or unidentified related form
 * †Ecnomiophyllum – type locality for genus
 * †Ecnomiophyllum fascis – type locality for species
 * †Ecnomiophyllum merriami – type locality for species
 * †Ecnomiophyllum simpsoni
 * †Ectenonotus
 * †Ectenonotus westoni – or unidentified comparable form
 * †Ectenonotus whittingtoni
 * †Ectenonotus whittingtonia
 * †Ectenotus – tentative report
 * †Ectoprimitia
 * †Edmondia
 * †Egania – type locality for genus
 * †Egania typicalis – type locality for species
 * †Egorovia
 * †Egorovia longituda – or unidentified related form
 * †Egosiella – tentative report
 * †Ehmaniella
 * †Ehmaniella angustigena
 * †Ehmaniella fronsplanata
 * †Ekeraspis
 * †Ekeraspis floweri
 * †Ekeraspis nevadensis
 * †Ekteinocrinus
 * †Ekteinocrinus battleshipensis
 * †Ekvasophyllum
 * †Elassocrinus
 * †Elassocrinus cyathus
 * †Elassocrinus delicatulus
 * †Elassocrinus inornatus
 * †Elassocrinus nodosus
 * †Elburgia
 * †Elburgia granulosa
 * †Elburgia quinnensis
 * †Eleutherokomma
 * †Eleutherokomma impennis – or unidentified comparable form
 * †Eleutherospira
 * †Eleutherospira sinistralis – type locality for species
 * †Elibatocrinus
 * †Elibatocrinus elongatus
 * †Eliorhynchus
 * †Eliorhynchus castanea
 * †Eliorhynchus nevadensis
 * †Elita
 * †Elkoceras – type locality for genus
 * †Elkoceras volborthi – type locality for species
 * †Elliottella
 * †Elliottella multicostata – or unidentified related form
 * †Elrathina
 * †Elrathina antiqua
 * †Elrathina wheelera
 * †Elvania
 * †Elvinia
 * †Elvinia roemeri
 * †Elviniella
 * †Elviniella laevis
 * †Elythyna
 * †Emanuella
 * †Emanuella meristoides
 * †Embolophyllum
 * †Embolophyllum carbonense – type locality for species
 * †Emmonsia
 * †Enantiosphenella
 * †Enantiosphenella cybele
 * †Encrinuroides
 * Encrinurus egani from Wisconsin.JPG †[[Encrinurus]]
 * †Endelocrinus
 * †Endelocrinus torus
 * †Endophyllum
 * †Endothyra
 * †Endothyra bowmani – or unidentified related form
 * †Endothyra excellens
 * †Endothyra maxima
 * †Endothyra pandorae
 * †Endothyra phrissa
 * †Endothyra prisca – or unidentified loosely related form
 * †Endothyra tantala
 * †Endothyranella
 * †Endothyranopsis
 * †Endothyranopsis compressus
 * †Endothyranopsis crassus
 * †Endothyranopsis scitula
 * †Endymionia
 * †Endymionia meeki – or unidentified comparable form
 * †Entactinia
 * †Entactinia spongia – tentative report
 * †Entactinia sublata – or unidentified related form
 * †Enteletes
 * †Entogonites
 * †Eoangyomphalus
 * †Eoangyomphalus klapperi – type locality for species
 * †Eochonetes
 * †Eoendothyrandopsis
 * †Eoendothyranopsis
 * †Eoendothyranopsis donica
 * †Eoendothyranopsis ermakiensis
 * †Eoendothyranopsis robusta – or unidentified related form
 * †Eoendothyranopsis scitula
 * †Eofallotaspis – or unidentified comparable form
 * †Eofalodus
 * †Eofalodus brevis
 * †Eofletcheria
 * †Eoglossinotoechia
 * †Eokochaspis – type locality for genus
 * †Eokochaspis cabinensis
 * †Eokochaspis delamarensis
 * †Eokochaspis granulosa – type locality for species
 * †Eokochaspis longspina
 * †Eokochaspis metalaspis – type locality for species
 * †Eokochaspis nodosa – type locality for species
 * †Eokochaspis piochensis
 * †Eoleperditia
 * †Eoleperditia bivia
 * †Eolissochonetes
 * †Eolissochonetes keyesi
 * †Eomarginifera
 * †Eomarginifera haydensis – or unidentified comparable form
 * †Eoparafusulina
 * †Eoparafusulina bellula – type locality for species
 * †Eoparafusulina concisa – type locality for species
 * †Eoparafusulina spissa
 * †Eoplectodona
 * †Eoplectodonta
 * †Eoplectodonta alternata
 * †Eopteria
 * †Eopteria richardsoni – or unidentified comparable form
 * †Eoptychoparia – or unidentified comparable form
 * †Eoptychoparia piochensis
 * †Eorobergia
 * †Eoschubertella
 * †Eoschuchertella
 * †Eospirifer
 * †Eostaffella
 * †Eostaffella tortula
 * †Eotetragraptus
 * †Eothele
 * †Eothele spurri
 * †Eotuberitina
 * †Epiphyton
 * †Epiphyton pencillatum – or unidentified comparable form
 * †Epistacheoides
 * †Eridoconcha
 * †Eridopora
 * †Eriella – tentative report
 * †Erisocrinus
 * †Erisocrinus longwelli
 * †Erixanium
 * †Erixanium brachyaxis
 * †Erixanium carinatum
 * †Erixanium multisegmentus
 * †Eroicaspira
 * †Eroicaspira simulatrix
 * †Esmeraldina
 * †Esmeraldina cometes – type locality for species
 * †Esmeraldina elliptica
 * †Esmeraldina lidensis – type locality for species
 * †Esmeraldina rowei
 * †Ethmophyllum
 * †Euconia – tentative report
 * †Eugonophyllum
 * †Eukrinaster
 * †Eukrinaster ibexensis
 * †Eumetria
 * †Eumetria acutirostra – or unidentified comparable form
 * †Eumorphoceras
 * †Eumorphoceras bisulcatum
 * Euomphalus fossil cropped.png †[[Euomphalus]]
 * †Euomphalus latus
 * †Euomphalus pancakensis – type locality for species
 * †Euphemites
 * †Euphemites crenulatus
 * †Euphemites kingi
 * †Euphemites nevadensis – type locality for species
 * †Euphemitopsis
 * †Euphemitopsis subpapillosa
 * †Euptychaspis
 * †Eurekablastus – type locality for genus
 * †Eurekablastus ninemilensis – type locality for species
 * †Eurekaspirifer – type locality for genus
 * †Eurekaspirifer pinyonensis
 * †Eurekia
 * †Eurychilina
 * †Euryzone – tentative report
 * †Eustypocystis
 * †Eustypocystis minor
 * †Evanescirostrum
 * †Evanescirostrum glabraventra
 * †Exochops
 * †Exochops portlocki
 * †Exocrinus
 * †Exocrinus moorei

F

 * †Faberophyllum
 * †Fallotaspidia
 * Fallotaspis longa.png †[[Fallotaspis]]
 * †Fallotaspis bondoni – or unidentified comparable form
 * †Favosites
 * †Fenestella
 * †Fenestella stocktenensis
 * †Fenestrellina
 * †Fenestrocyathus
 * †Ferganella
 * †Ferganella borealis
 * †Fieldaspis
 * †Fieldaspis bilobata
 * †Fieldaspis celer
 * †Fieldaspis superba
 * †Fimbrinia
 * †Fimbrinia plummeri
 * †Finkelnburgia – tentative report
 * †Finkelnburgia scenidioides – or unidentified comparable form
 * †Fistellaspongia – type locality for genus
 * †Fistellaspongia inclinata – type locality for species
 * †Fistulipora
 * †Fistulipora bifoliatus
 * †Fistutlipora
 * †Fistutlipora lamellatis
 * †Flabellitesia
 * †Flabellitesia flabellites
 * †Flexaria
 * †Flexaria arkansana
 * Flexicalymene-ouzregui-rolled.jpg †[[Flexicalymene]]
 * †Fomichevella
 * †Fomichevella nevadensis – type locality for species
 * †Fomichevella schrenki
 * †Fomichevella waltersi – type locality for species
 * †Fremontia
 * †Freontia
 * †Fritzaspis
 * †Fritzaspis generalis
 * †Fritzaspis ovalis
 * †Fusulinella
 * †Fusulinella acuminata
 * †Fusulinella fugax

G

 * †Gabelia – type locality for genus
 * †Gabelia fascicula
 * †Gabelia giganta
 * †Gabelia intermedia – type locality for species
 * †Gabelia pedunculus – type locality for species
 * †Gacella – tentative report
 * †Gallatinospongia
 * †Gallatinospongia conica
 * †Gamachignathus
 * †Gamachignathus ensifer
 * †Gasterocoma
 * †Gasterocoma bicaula – type locality for species
 * †Gattendorfia – tentative report
 * †Genalaticurus
 * †Genalaticurus genalatus – or unidentified comparable form
 * †Gennaeocrinus
 * †Gennaeocrinus maxwelli – type locality for species
 * Geragnostus mediterraneus CRF cropped.jpg †[[Geragnostus]]
 * †Geraldinella
 * †Geranocephalus
 * †Geranocephalus truncatus
 * †Girtyana
 * †Girtyana stellara – type locality for species
 * †Girtyoceras
 * †Girtyoceras hamiltonense – type locality for species
 * †Girtypecten
 * †Girvanella
 * †Glabrocingulum
 * †Glabrocingulum quadrigatum
 * †Glaphurochiton – tentative report
 * †Glaphurus
 * †Glaphyraspis
 * †Glaphyraspis ornata
 * †Glassia
 * †Glassia triangulata
 * †Globivalvulina – tentative report
 * †Globoendothyra
 * †Globoendothyra tomiliensis – or unidentified related form
 * Glomospira
 * †Glossopleura
 * †Glossopleura lodensis
 * †Glossopleura tuta
 * †Glossopleura walcotti
 * †Glyphaspis
 * †Glyphaspis concavus
 * †Glyptagnostus
 * Glyptagnostus reticulatus angelini - holotype (Allison R. Palmer, 1962).png]] †Glyptagnostus reticulatus''
 * †Glyptograptus
 * †Glyptomena – tentative report
 * †Glyptorthis
 * †Glyptospira
 * †Glyptospira arelela – type locality for species
 * †Gnathodus
 * †Gnathodus muricatus
 * †Gnathodus simplex – or unidentified related form
 * †Gogia
 * †Gogia longidactylus
 * †Goldfieldia – type locality for genus
 * †Goldfieldia pacifica – type locality for species
 * †Goniasma
 * Goniatitidae - Goniatites species.JPG †[[Goniatites]]
 * †Goniatites americanus
 * †Goniatites deceptus
 * †Goniatites eganensis – type locality for species
 * †Goniatites sowerbyi – type locality for species
 * †Goniophrys – tentative report
 * †Goniotelina
 * †Goniotelina ensifer
 * †Goniotrypa
 * †Gosseletina – tentative report
 * †Grabaulites
 * †Grabaulites jacksoni – or unidentified comparable form
 * †Gracianella
 * †Grammatodon
 * †Grammatodon politus
 * †Grandaurispina – or unidentified comparable form
 * †Grandaurispina type locality for species A – informal
 * †Grandinasus
 * †Grandinasus argentus
 * †Grandinasus auricampus
 * †Grandinasus patulus
 * †Granulifera
 * †Granulifera granulosa
 * †Graphiocrinus
 * †Graphiocrinus scopulus
 * †Graphiodactyllis
 * †Groomodiscus – type locality for genus
 * †Groomodiscus rossi – type locality for species
 * †Grovesella
 * †Grovesella nevadensis – type locality for species
 * †Grovesella tabasensis
 * †Gryphochiton
 * †Gryphochiton distinctus – type locality for species
 * †Grypophyllum
 * †Gypidula
 * †Gypidula loweryi
 * †Gypidula praeloweryi – type locality for species
 * †Gypidula pseudogaleata – or unidentified comparable form
 * †Gypidulina
 * †Gypidulina Sp. C – informal
 * Spiriferidae - Gypospirifer condor cropped.jpg †[[Gypospirifer]]
 * †Gypospirifer infraplicus – or unidentified comparable form

H

 * †Hadrocephalites
 * †Hadrocephalites lyndonensis
 * †Hadrocephalites rhytidodes
 * †Hadropipetta
 * †Hadropipetta nevadensis – type locality for species
 * †Hadrorhynchia
 * †Hadrorhynchia sandersoni
 * †Hadrotreta
 * †Hadrotreta primaaea
 * HalysitesSilurian.jpg †[[Halysites]]
 * †Hamarodus
 * †Hamarodus europaeus
 * †Hammatospira – type locality for genus
 * †Hammatospira bellula – type locality for species
 * †Hammatostroma
 * †Haplistion
 * †Haplistion aeluroglossa
 * †Haplistion sphaericum – or unidentified comparable form
 * †Hapsiphyllum
 * †Hardyoides
 * †Hardyoides mimicus
 * †Harklessia – type locality for genus
 * †Harklessia yuenglingensis – type locality for species
 * †Harpillaenus
 * †Harpillaenus rossi – type locality for species
 * †Hebetoechia
 * †Heckethornia
 * †Heckethornia bowiei
 * †Heckethornia hyndeae – type locality for species
 * †Heckethornia morrisseyi
 * †Heckethornia numani – type locality for species
 * †Hedeina
 * †Hedinaspis
 * †Hedinaspis regalis
 * †Hedraites – tentative report
 * †Heintzella
 * †Heintzella davydovi – type locality for species
 * †Heintzella playfordi – type locality for species
 * †Heintzella radiata – or unidentified comparable form
 * †Heintzella whitneyi
 * Helicoprion bessonovi cropped.png †[[Helicoprion]]
 * †Helicoprion bessonowi
 * †Helicotis – tentative report
 * †Helicotoma
 * †Heliomera
 * †Heliomera albata – or unidentified comparable form
 * †Helminthochiton
 * †Hemiarges – tentative report
 * †Hemiptychina
 * †Hemiptychina quadricostata
 * †Heritschiella
 * †Heritschiella girtyi
 * †Hermatostroma
 * †Hesperinia
 * †Hesperinia kirki – type locality for species
 * †Hesperocoelia
 * †Hesperocoelia typicalis
 * †Hesperomena
 * †Hesperomena leptellinoidea
 * †Hesperonomia
 * †Hesperonomia antelopensis
 * †Hesperonomia crassa – or unidentified comparable form
 * †Hesperonomia iones
 * †Hesperonomia nemea – or unidentified comparable form
 * †Hesperonomia planidorsalis – or unidentified comparable form
 * †Hesperonomiella
 * †Hesperonomiella minor
 * †Hesperorthis
 * †Hesperorthis antelopensis – or unidentified comparable form
 * †Hesperorthis matutina – or unidentified comparable form
 * †Heteralosia
 * †Heteralosia slocomi
 * †Heterelasma
 * †Heterelasma type locality for species A – informal
 * †Heterocaninia – tentative report
 * †Heterocaninia langenheimi
 * †Heteropecten
 * †Heteropecten vanvleeti
 * †Heterophrentis
 * †Hexatractiella
 * †Hexatractiella nevadensis
 * †Highgatella
 * †Highgatella cordilleri
 * †Hillyardina – tentative report
 * †Hinganella
 * †Hinganella felderi – type locality for species
 * †Hintzeia
 * †Hintzeia celsaora
 * †Hiscobeccus
 * †Hiscobeccus capax
 * †Hiscobeccus gigas
 * †Holcocystis
 * †Holcocystis flexa
 * †Holmiella
 * †Holmiella falx
 * †Holmiella millerensis
 * †Homagnostus
 * †Homagnostus comptus – type locality for species
 * †Homagnostus lumidosus
 * †Homagnostus obesus
 * †Homograptus
 * †Homotelus
 * †Homotrypa
 * †Housia
 * †Housia ovata
 * †Howellella
 * †Howellella cycloptera
 * †Howellella textilis – or unidentified comparable form
 * †Hunnebergia – tentative report
 * †Hustedia
 * †Hustedia culcitula
 * †Hustedia elongata
 * †Hustedia gibbosa
 * †Hustedia miseri
 * †Hustedia mormoni – or unidentified comparable form
 * †Hustedia rotundi
 * †Hustedia stataria
 * †Hyalostelia
 * †Hyolithellus
 * †Hyolithellus insolitus
 * †Hyolithes
 * †Hyperchilarina
 * †Hypermecaspis
 * †Hypermecaspis kolouros
 * †Hypochilarina – tentative report
 * Hypodicranotus striatulus.JPG †[[Hypodicranotus]]
 * †Hypothyridina
 * †Hypselentoma – tentative report
 * †Hypsiptycha
 * †Hypsiptycha anticostiensis – or unidentified comparable form
 * †Hysterolites
 * †Hystriculina
 * †Hystriculina hystricula
 * †Hystriculina type locality for species A – informal
 * †Hystriculina wabashensis
 * †Hystricurus
 * †Hystricurus oculilunatus – or unidentified comparable form

I

 * †Ianthinopsis
 * †Iapetognathus
 * †Iapetognathus sprakersi
 * †Ichodella
 * †Icriodus
 * †Icriodus angustus – or unidentified comparable form
 * †Icriodus brevis
 * †Icriodus difficilis
 * †Icriodus hesperius
 * †Icriodus latericrescens
 * †Icriodus nevadensis
 * †Icriodus norfordi
 * †Icriodus trojani
 * †Iddingsia
 * †Iddingsia robusta
 * †Iddingsia similis
 * †Idiomesus
 * †Idiostroma
 * †Idiostrophia
 * †Idiostrophia conciliata
 * †Idiostrophia lenticularis – type locality for species
 * †Idiostrophia nuda
 * †Idiostrophia paucicostata – or unidentified comparable form
 * †Idiostrophia valdari – type locality for species
 * Illaenidae - Illaenus tauricornis.JPG †[[Illaenus]]
 * †Illaenus alveatus – or unidentified comparable form
 * †Illaenus auriculatus
 * †Illaenus fraternus – or unidentified comparable form
 * †Illaenus oscitatus – tentative report
 * †Illaenus utahensis
 * †Ilmenia
 * †Imitoceras
 * †Indivisia – tentative report
 * †Inflatia
 * †Ingria
 * †Ingria cloudi
 * †Innitagnostus
 * †Innitagnostus inexpectans
 * †Intomodesma – tentative report
 * †Invertrypa
 * †Invertrypa subnuba
 * †Invertrypa talis – type locality for species
 * †Iridistrophia
 * †Irvingella
 * †Irvingella angustilimbatus
 * †Irvingella flohri
 * †Irvingella major
 * †Irvingella transversa
 * †Isbergia
 * †Ischyrophyma – tentative report
 * †Ischyrotoma
 * †Ischyrotoma juabensis
 * †Ischyrotoma stubblefieldi
 * †Isochilina
 * †Isograptus
 * †Isophragma – tentative report
 * †Isorthis
 * †Isoteloides
 * Isotelus brachycephalus.JPG †[[Isotelus]]
 * †Isotelus copenhagenensis
 * †Isotelus spurius
 * †Ivanovia

J

 * †Jedria
 * †Jeffersonia
 * †Jefina
 * †Johnsonetes – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Johnsonetes filistriata
 * †Juresania
 * †Juresania ovalis – or unidentified comparable form
 * †Juresania rectangularis – or unidentified comparable form

K

 * †Kainella
 * †Kainella flagricauda
 * †Kalimnasphaera
 * †Kalimnasphaera maculosa – or unidentified related form
 * †Kallimorphocrinus
 * †Kallimorphocrinus eaglei
 * †Kanoshia
 * †Kanoshia reticulata
 * †Kaskia
 * †Katuniella – tentative report
 * †Kawina
 * †Kawina wilsoni – type locality for species
 * †Kazakhoceras
 * †Kazakhoceras bylundi
 * †Keriocyathus – type locality for genus
 * †Keriocyathus arachnaius – type locality for species
 * †Kindbladia
 * †Kindbladia affinis
 * †Kingopora
 * †Kingopora ehrenbergi – or unidentified comparable form
 * †Kingopora inflata – type locality for species
 * †Kingopora wardlawiensa – type locality for species
 * †Kistocare
 * †Kistocare campbellensis – type locality for species
 * †Kitikamispira
 * †Kitikamispira minuitinodosa
 * †Kleopatrina
 * †Kleopatrina arcturusensis – type locality for species
 * †Kleopatrina ftatateeta
 * †Kleopatrina grandis
 * †Kleopatrina magnifica
 * †Kleopatrina simplex
 * †Kloedenellitina – tentative report
 * †Knightina
 * †Knoxiella – tentative report
 * †Kochaspis
 * †Kochaspis augusta
 * †Kochaspis liliana
 * †Kochiella
 * †Kochiella augusta
 * †Kochiella brevaspis
 * †Kochiella maxeyi
 * †Kochiellina
 * †Kochiellina groomensis
 * †Kochiellina janglensis
 * †Kochina
 * †Kochina walcotti – type locality for species
 * †Kochiproductus
 * †Komaspidella
 * †Komaspidella occidentalis – type locality for species
 * †Kometia – tentative report
 * †Komia
 * †Komia eganensis
 * †Komiella
 * †Komiella magnasulca
 * †Koneprusia
 * †Konickophyllum
 * †Koninckophyllum
 * Kootenia fossil cropped.png †[[Kootenia]]
 * †Kootenia acicularis
 * †Kootenia aculacauda – type locality for species
 * †Kootenia brevispina
 * †Kootenia convoluta
 * †Kootenia crassa
 * †Kootenia crassinucha – type locality for species
 * †Kootenia dawsoni
 * †Kootenia germana
 * †Kormagnostella
 * †Kormagnostella advena
 * †Kozlowskia
 * †Kozlowskia haydenensis
 * †Kozlowskia kingi
 * †Kozlowskia splendens
 * †Kozlowskiellina
 * †Kozlowwkiella
 * †Kozlowwkiella lazarei
 * †Krausella
 * †Krotovia
 * †Krotovia globosa – or unidentified related form
 * †Krotovia knighti
 * †Kutorginella
 * †Kutorginella lasallensis
 * †Kutorginella pseudantiquatonia – type locality for species
 * †Kuvelousia
 * †Kuvelousia leptosa
 * †Kyrshabaktella

L

 * †Labiostria
 * †Labiostria westropi
 * †Lachnostoma
 * †Lachnostoma latucelsum
 * †Ladatheca
 * †Ladatheca cylindrica
 * †Ladjia
 * †Ladjia cordillera – type locality for species
 * †Ladjia russelli
 * †Ladjia saltica – or unidentified comparable form
 * †Ladogioides
 * †Ladogioides pax – or unidentified comparable form
 * †Laeogyra – or unidentified comparable form
 * †Lamellospira
 * †Landercyathus – type locality for genus
 * †Landercyathus lewandowskii – type locality for species
 * †Laticrura
 * †Laticrura heteropleura – or unidentified comparable form
 * †Latiendothyra
 * †Laurentoscandodus
 * †Laurentoscandodus triangularis
 * †Lebobienvillia
 * †Leeites
 * †Leeites leei – type locality for species
 * †Lehua
 * †Lehua argus – or unidentified related form
 * †Leiorhynchus
 * †Leiorhynchus carboniferum
 * †Leiorhynchus hippocastanea
 * †Leiorhynchus miriam
 * †Leiorhynchus nevadensis – or unidentified comparable form
 * †Leiorhynchus rhabdotum – or unidentified comparable form
 * †Leiostegium
 * †Leiostegium goodwinensis
 * †Leiostrototropis – tentative report
 * †Lensotreta – type locality for genus
 * †Lensotreta perplexa – type locality for species
 * †Leonardoceras
 * †Leonardoceras parvum
 * LeonaspisDeflexa-NaturalHistoryMuseum-August23-08.jpg †[[Leonaspis]]
 * †Leperditella
 * †Leperditella incisa – or unidentified comparable form
 * †Leperditella tumida – or unidentified comparable form
 * †Leperditella valida
 * †Lepetopsis
 * †Lepetopsis franae – type locality for species
 * †Lepidocyclus
 * †Lepidoleptaena
 * †Leptaena
 * †Leptaena acuticuspidata – or unidentified comparable form
 * †Leptaena ordovicica – or unidentified comparable form
 * †Leptaenisca
 * †Leptathyris
 * †Leptathyris circula
 * †Leptathyris index
 * †Leptathyris obsolescens
 * †Leptella
 * †Leptella austrina – type locality for species
 * †Leptella nevadensis
 * †Leptellina
 * †Leptellina occidentalis
 * †Leptobolus – tentative report
 * †Leptocoelia
 * †Leptocoelia murphyi – type locality for species
 * †Leptocoelina
 * †Leptocoelina squamosa – type locality for species
 * †Leptodesma
 * †Leptomphalus
 * †Leptomphalus arcturus – type locality for species
 * †Leptostrophia
 * †Leptostrophia beckii – or unidentified comparable form
 * †Leptostrophia inequicostella
 * †Lesueurilla
 * †Leurosina
 * †Leurosina sinesulca
 * †Levenea
 * †Levenea fagerholmi – type locality for species
 * †Levenea navicula – type locality for species
 * †Lichenaria
 * †Licnocephala
 * †Licnocephala cavigladius
 * †Lidaconus – type locality for genus
 * †Lidaconus palmettoensis – type locality for species
 * †Limipecten
 * †Lingula
 * †Lingula carbonaria – or unidentified comparable form
 * Lingulella caelata 1.png †[[Lingulella]]
 * †Linipalus
 * †Linipalus magnispinus – or unidentified related form
 * †Linnarssonella
 * †Linnarssonia
 * †Linoproductus
 * †Linoproductus ovata
 * †Linoproductus planiventralis
 * †Linoproductus prattenianus
 * †Linoproductus prottenianus
 * †Liocheina
 * †Liricamera
 * †Liricamera nevadensis
 * †Lissatrypa – tentative report
 * †Lissochonetes
 * †Lissocoelia
 * †Lissocoelia cylindrica – type locality for species
 * †Lissocoelia ramosa
 * †Listroa
 * †Listroa toxoura
 * †Lithostrotionella
 * †Lithostrotionella castelnaui
 * †Litocephalus
 * †Litocephalus bilobatus
 * †Litocephalus granulomarginatus
 * †Litocephalus magnus
 * †Litocephalus verruculapeza
 * †Lobocorallium
 * †Lobocorallium trilobatum
 * †Lobosiphon
 * †Lodanaria – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Lodanaria floryi
 * †Loganograptus
 * †Lomatopisthia – tentative report
 * Lonchodomas mcgeheei CRF.jpg †[[Lonchodomas]]
 * †Lophonema
 * †Lophonema frydai
 * †Lophophyllum – tentative report
 * †Lophospira
 * †Lophospira perangulata
 * †Lotagnostus
 * †Lotagnostus trisectus – or unidentified comparable form
 * †Loxonema
 * †Loxonema walcotti – type locality for species
 * †Lunulazona
 * †Lutulentus
 * †Lutulentus muralspineus
 * †Lyrielasma
 * †Lytvophyllum – tentative report

M
†Modiolus
 * †Macannaia
 * †Macannaia maladensis
 * †Macgeea
 * †Machaeraria
 * †Mackenziecyathus
 * †Mackenziecyathus bukryi
 * †Macluritella – tentative report
 * †Macluritella gyroceras – or unidentified comparable form
 * †Maclurites
 * †Maclurites magnus
 * †Macrocyproides
 * †Madaraspis
 * †Madaraspis magnifica
 * †Malayaspira
 * †Malayaspira annulata
 * †Malayaspira hintzei
 * †Mametella
 * †Manzanella
 * †Marginia
 * †Marginia ivanovae – or unidentified comparable form
 * †Marginovatia
 * †Marginovatia catinulus
 * †Marginovatia eurekensis
 * †Martinia
 * †Martiniopsis – tentative report
 * †Mauryella
 * †Mccloudius
 * †Mccloudius parvus – type locality for species
 * †Mclearnites
 * †Mclearnites invasor
 * †Meekella
 * †Meekella attenuata
 * †Meekella striatocostata
 * †Meekopinna
 * †Meekopinna sagitta
 * †Meekopora
 * †Meekospira
 * †Megakozlowskiella
 * †Megakozlowskiella magnapleura – type locality for species
 * †Megakozlowskiella raricosta – or unidentified comparable form
 * †Megalaspidella – tentative report
 * †Megalaspides
 * †Megastrophia
 * †Megastrophia iddingsi
 * †Megastrophia transitans
 * Trilobites - Megistaspis aliena..JPG †[[Megistaspis]]
 * †Meristella
 * †Meristella robertsensis
 * †Meristina
 * †Merriamites
 * †Merriamites eurekae
 * †Mesodouvillina
 * †Mesodouvillina varistriata – or unidentified comparable form
 * †Mesolobus
 * †Mesopholidostrophia – tentative report
 * †Mesoschubertella
 * †Mesoschubertella mullerriedi
 * †Mesotrypa
 * †Metabolograptus
 * †Metabolograptus persculptus
 * Metacoceras discoideum 01.jpg †[[Metacoceras]]
 * †Metadimorphoceras
 * †Metadimorphoceras richardsi – type locality for species
 * †Metaldetes
 * †Metaplasia
 * †Metaplasia paucicostata – or unidentified comparable form
 * †Metrionaxon
 * †Mexicaspis
 * †Mexicaspis difuntosensis
 * †Mexicella
 * †Mexicella antelopea
 * †Mexicella grandoculus – tentative report
 * †Mexicella granulata – type locality for species
 * †Mexicella mexicana
 * †Mexicella robusta
 * †Mexicella stator
 * †Michelinia
 * †Michelinia meekana
 * †Michelinoceras
 * †Michelinoceras wilsoni
 * †Microcardinalia
 * †Microcheinella
 * †Microcheinella peculiaris – or unidentified comparable form
 * †Microdoma
 * †Micromitra
 * †Microplasma
 * †Microryctocara
 * †Microryctocara nevadensis
 * †Milleratia – tentative report
 * †Millerella
 * †Millerella marblensis
 * †Mimatrypa
 * †Mimospira
 * †Mimospira helmhackeri – or unidentified related form
 * †Minervaecystis – tentative report
 * †Minupeltis
 * †Minupeltis conservator
 * †Minycardita – type locality for genus
 * †Minycardita sectilis – type locality for species
 * †Missisquoia
 * †Mizzia
 * †Mizzia yabei – or unidentified comparable form
 * †Moapacrinus
 * †Moapacrinus inornatus
 * †Moapacrinus rotundatus
 * †Modiolus nevadensis
 * †Modiomorpha – tentative report
 * †Modiomorpha pintoensis
 * †Molybdocyathus – type locality for genus
 * †Molybdocyathus juvenilis – type locality for species
 * †Monocraterion
 * Spirograptus spiralis cropped.jpg †[[Monograptus]]
 * †Monograptus angustidens
 * †Monograptus birchensis
 * †Monograptus hercynicus
 * †Monograptus thomasi
 * †Monograptus uniformis
 * †Monograptus yukonensis
 * †Mononusphaericorhynchus
 * †Mononusphaericorhynchus sartenaeri
 * †Monotiopleura
 * †Montezumaspis
 * †Montezumaspis cometes
 * †Montezumaspis parallela
 * †Monticuliporella
 * †Moorefieldella
 * †Moorefieldella eurekensis
 * †Mooreoceras
 * †Morinorhynchus
 * †Morosa
 * †Morosa brevispina
 * †Morosa definita
 * †Morosa extensa
 * †Morosa longispina
 * †Morozoviella – type locality for genus
 * †Morozoviella curriensis – type locality for species
 * †Morozoviella praecurriensis – type locality for species
 * †Moscovicrinus
 * †Moscovicrinus bipinnatus
 * †Mourlonia
 * †Mourlonia type locality for species A – informal
 * †Mucophyllum
 * †Mucophyllum oliveri
 * †Multicostella
 * †Multioistodus
 * †Multithecopora
 * †Multithecopora hypatiae
 * †Murchisonia
 * †Murchisonia megathanae – type locality for species
 * †Murchisonia tillesae – type locality for species
 * †Mutationella – tentative report
 * †Myalina
 * †Mytilarca

N

 * †Nadiastrophia
 * †Nanicella
 * †Nanillaenus
 * †Nankinella
 * †Nanorthis
 * †Nanorthis hamburgensis
 * †Nardophyllum
 * Neritopsidae - Naticopsis.JPG †[[Naticopsis]]
 * †Naticopsis glomerosa – type locality for species
 * †Naticopsis inornata
 * †Naticopsis kaibabensis
 * †Neaxon
 * †Neilsonia
 * †Neilsonia welleri – or unidentified comparable form
 * †Nemesa
 * †Nemesa cimex – type locality for species
 * †Neoarchaediscus
 * †Neochonetes
 * †Neochonetes acanthoporus
 * †Neochonetes dominus
 * †Neochonetes granulifer
 * †Neoeridotrypella
 * †Neoeridotrypella schilti – type locality for species
 * †Neomphyma
 * †Neomphyma karpinskiense
 * †Neomphyma nevadense
 * †Neomultithecopora
 * †Neomultithecopora mccutcheonae – type locality for species
 * †Neopanderodus
 * Trigonotretidae - Neospirifer ravana.JPG †[[Neospirifer]]
 * †Neospirifer cameratus
 * †Neospirifer dunbari
 * †Neospirifer gorei
 * †Neospirifer goreii
 * †Neospirifer latus – or unidentified comparable form
 * †Neospirifer triplicatus
 * †Neosyringopora
 * †Neosyringopora multattenuata
 * †Neozeacrinus
 * †Neozeacrinus coronulus
 * †Neozeacrinus wanneri
 * Nephrolenellus geniculatus left light CRF.jpg †[[Nephrolenellus]]
 * †Nephrolenellus geniculatus
 * †Nephrolenellus greniculatus – type locality for species
 * †Nervostrophia
 * †Nevadacrinus
 * †Nevadacrinus geniculatus
 * †Nevadaspira – type locality for genus
 * †Nevadaspira cooperi – type locality for species
 * †Nevadatubulus – type locality for genus
 * †Nevadatubulus dunfee – type locality for species
 * †Nevadella
 * †Nevadella eucharis
 * Nevadia weeksi CRF.jpg †[[Nevadia]]
 * †Nevadia parvoconica
 * †Nevadia weeksi
 * †Nevadoceras
 * †Nevadoceras steelei – type locality for species
 * †Nevadocoelia
 * †Nevadocoelia grandis
 * †Nevadocoelia pulchrata
 * †Nevadocoelia traini
 * †Nevadocoelia wistae
 * †Newberria
 * †Nicholsonella – tentative report
 * †Nicklesopora
 * †Nicklesopora avia
 * †Nicolella – tentative report
 * †Nicollidina
 * †Nicollidina brevis
 * †Nielsonia – or unidentified related form
 * †Nileus
 * †Nileus hesperaffinis
 * †Nileus scrutator – or unidentified related form
 * †Niobe
 * †Niobe quadraticaudata – or unidentified comparable form
 * †Niobella
 * †Nisusia – tentative report
 * †Noblella
 * †Noblella tremadociensis – type locality for species
 * †Normalograptus
 * †Normalograptus ajjeri
 * †Normalograptus angustus
 * †Normalograptus elegantulus
 * †Normalograptus extraordinarius
 * †Normalograptus myrniensis
 * †Normalograptus ojsuensis
 * †Nothorthis – tentative report
 * †Notopeltis
 * †Notopeltis orthometopa
 * †Nucleospira
 * †Nucleospira subsphaerica – type locality for species
 * †Nuculavus
 * †Nuculavus levatiformis
 * †Nuculoidea
 * †Nuculopsis
 * †Nuculopsis darlingensis – or unidentified comparable form
 * †Nuculopsis girtyi
 * †Nuculopsis levatiformis
 * †Nuia
 * †Nyctopora
 * †Nyella
 * †Nyella clinolimbata
 * †Nyella granosa
 * †Nyella immoderata
 * †Nyella plana
 * †Nyella rara

O

 * Obolella crassa cropped.png †[[Obolella]]
 * †Obolus
 * †Odontospirifer
 * †Odontospirifer type locality for species A – informal
 * †Oepikina
 * †Ogygopsis
 * †Ogygopsis batis
 * †Ogygopsis typicalis
 * †Oistodus
 * †Oistodus contractus
 * †Oistodus lanceolatus – or unidentified comparable form
 * †Oklahomacrinus
 * †Oklahomacrinus triangulus
 * †Olenaspella
 * †Olenaspella paucisegmenta
 * †Olenaspella regularis
 * †Olenaspella separata – type locality for species
 * Olenellus NT small.jpg  †[[Olenellus]]
 * †Olenellus chiefensis – type locality for species
 * †Olenellus clarki
 * †Olenellus fowleri – type locality for species
 * †Olenellus fremonti – or unidentified comparable form
 * †Olenellus gilberti
 * †Olenellus howelli
 * †Olenellus multinodus
 * †Olenellus puertoblancoensis – tentative report
 * †Olenellus terminatus – type locality for species
 * Olenoides serratus oblique with antennas.jpg †[[Olenoides]]
 * †Olenoides maladensis
 * †Olenoides steptoensis – type locality for species
 * †Olenus
 * †Olenus wilsoni
 * †Oligometopus
 * †Oligometopus contractus
 * †Ollenellus
 * †Ollenellus gilberti
 * †Omphalocirrus – tentative report
 * †Omphalotrochus
 * †Onchocephalites
 * †Onchocephalites claytonensis – type locality for species
 * †Onchocephalus
 * †Onchocephalus maior – or unidentified comparable form
 * †Onchocephalus major – or unidentified comparable form
 * †Onchocephalus palupus – type locality for species
 * †Oncochilus
 * †Onuphlonella – tentative report
 * †Onychoplecia – tentative report
 * †Ophioxenikos
 * †Ophioxenikos langenheimi
 * †Opikina
 * †Opipeuter
 * †Opisthotreta
 * †Opisthotreta indistincta – type locality for species
 * †Opisthotreta transversa – type locality for species
 * †Opsiosoryctocephalus – type locality for genus
 * †Opsiosoryctocephalus ophis – type locality for species
 * †Orbiculoidea
 * †Orbiculoidea capuliformis
 * †Orbiculoidea missouriensis
 * †Orbiculoidea moorefieldana – or unidentified related form
 * †Orecopia
 * †Orecopia mccoyi
 * †Oriostoma
 * †Oriostoma gerbaulti
 * †Oriskania
 * †Orthambonites
 * †Orthambonites bifurcatus
 * †Orthambonites decipiens – or unidentified comparable form
 * †Orthambonites dinorthoides
 * †Orthambonites eucharis
 * †Orthambonites mazourkaensis – or unidentified comparable form
 * †Orthambonites minisculus
 * †Orthambonites minusculus
 * †Orthambonites patulus
 * †Orthambonites paucicostatus
 * †Orthambonites subulata
 * †Orthidiella
 * †Orthidiella carinata
 * †Orthidiella costellata
 * †Orthidiella extensa
 * †Orthidiella longwelli
 * †Orthidium
 * †Orthidium bellulum
 * †Orthidium fimbriatum – or unidentified related form
 * †Orthis
 * †Orthoceras
 * †Orthograptus
 * †Orthograptus calcaratus
 * †Orthograptus truncatus
 * †Orthonema
 * †Orthonychia
 * †Orthonychia occidens
 * †Orthoretiolites
 * †Orthoretiolites hami
 * †Orthostrophella
 * †Orthostrophella monitorensis – type locality for species
 * †Orthostrophia
 * †Orthotetes
 * †Orthotetes kaskaskiensis
 * †Orthotetes occidentalis
 * †Orthotichia – tentative report
 * †Orthovertella
 * †Orulgania
 * †Oryctocephalina
 * †Oryctocephalina maladensis – tentative report
 * †Oryctocephalites
 * †Oryctocephalites claytonensis – type locality for species
 * †Oryctocephalites palmeri
 * †Oryctocephalites rasettii
 * †Oryctocephalites runcinatus
 * †Oryctocephalites typicalis
 * †Oryctocephalus
 * †Oryctocephalus americanus – type locality for species
 * †Oryctocephalus indicus
 * †Oryctocephalus maladensis
 * †Oryctocephalus nyensis
 * †Oryctocephalus orientalis
 * †Oryctocephalus primus
 * †Otarion
 * Ottoia burrowing cropped.png  †[[Ottoia]]
 * †Ottoseetaxis
 * †Oulodus
 * †Oulodus rohneri
 * †Oulodus ulrichi
 * †Ovatia
 * †Ovatia latior – or unidentified comparable form
 * †Ovatia nodosa
 * †Ovatoryctocara – tentative report
 * †Oxoplecia
 * †Oxoplecia monitorensis
 * †Oxoplecia nevadensis
 * †Oxyspira – type locality for genus
 * †Oxyspira murphyi – type locality for species
 * †Ozarkodina
 * †Ozarkodina hassi
 * †Ozarkodina oldhamensis – tentative report
 * †Ozarkodina raaschi
 * †Ozarkodina tenuis – or unidentified comparable form

P

 * †Pachyaspis
 * †Pachyaspis gallagari – type locality for species
 * †Pachyaspis longa – type locality for species
 * †Pachyconulus
 * †Pachyconulus parvalus
 * †Pachydictya
 * †Pachyfavosites
 * †Pachyphyllum
 * †Pachystrophia
 * †Pacificocoelia
 * †Pacificocoelia infrequens
 * †Paeckelmanella
 * †Paedeumias
 * †Paedeumias granulatus – type locality for species
 * †Paedeumias nevadensis – tentative report
 * †Paenebeltella
 * Pagetia taijiangensis 2.jpg †[[Pagetia]]
 * †Pagetia arenosa
 * †Pagetia clytia
 * †Pagetia maladensis
 * †Pagetia mucrogena
 * †Pagetia prolata
 * †Pagetia resseri
 * †Pagetia rugosa
 * †Paladin
 * †Palaeocapulus
 * †Palaeocapulus piso
 * †Palaeocyclus
 * †Palaeocyclus eurylophus
 * †Palaeoneilo
 * †Palaeoneilo mcchesneyana
 * †Palaeophippium
 * †Palaeophippium octaramosum – type locality for species
 * †Palaeophyllum
 * †Palaeosphaera – type locality for genus
 * †Palaeosphaera micra – type locality for species
 * †Palaeostylus
 * †Palaeotextularia
 * †Palaeotextularia consobrina – or unidentified loosely related form
 * †Palaeotrifidus – type locality for genus
 * †Palaeotrifidus ballator – type locality for species
 * †Palaeotrifidus imbifurcus – type locality for species
 * †Palaeotripus
 * †Palaeotripus sexabrachiatus – type locality for species
 * †Paleofavosites
 * †Paleoneilo
 * †Palliseria – type locality for genus
 * †Palliseria longwelli – type locality for species
 * †Palliseria robusta
 * †Palmettaspis – type locality for genus
 * †Palmettaspis consorta – type locality for species
 * †Palmettaspis lidensis
 * †Palmettaspis parallela – type locality for species
 * †Paltodus
 * †Pamchonetes
 * †Pamchonetes macrostriatus
 * †Panacus – type locality for genus
 * †Panacus palmeri – type locality for species
 * †Pancus – type locality for genus
 * †Pancus palmeri – type locality for species
 * †Panderodus
 * †Panderodus feulneri
 * †Panderodus unicostatus
 * †Pandorinellian
 * †Pandorinellian linguiformis
 * †Pandorinellina
 * †Pandorinellina angustinpennatus – or unidentified comparable form
 * †Pandorinellina angustipennatus – or unidentified comparable form
 * †Pandorinellina exigua
 * †Pandorinellina expansa
 * †Pandorinellina linguiformis
 * †Pandorinellina steinhornensis
 * †Papiliophyllum
 * †Papiliophyllum murphyi
 * †Papiliophyllum vescum
 * †Paraantagmus
 * †Paraantagmus latus
 * †Parabellefontia
 * †Parabellefontia concinna – or unidentified comparable form
 * †Parabolablastus
 * †Parabolablastus elongatus – type locality for species
 * †Parabolinella
 * †Parabolinella hecuba
 * †Parabolinella tumifrons – or unidentified comparable form
 * †Paracaligelloides
 * †Parachaetes
 * †Parachonetes
 * †Parachonetes macrostriatus
 * †Paraconularia
 * †Paracrothyris
 * †Paracyclas
 * †Parafafallotaspis
 * †Parafallotaspis
 * †Parafusulina
 * †Paragloborilus
 * †Paraheritschioides
 * †Paraheritschioides californiense
 * †Paraheritschioides fergusonensis – type locality for species
 * †Paraheritschioides grandis
 * †Paraheritschioides nevadaensis – type locality for species
 * †Paraheritschioides stevensi
 * †Parahousia
 * †Parahousia constricta
 * †Parahousia subequalis
 * †Parahystricurus
 * †Parajuresania
 * †Parajuresania nebrascensis
 * †Paralbertella
 * †Paralbertella bosworthi
 * †Paralbertella bosworthy
 * †Paralenorthis
 * †Paralenorthis marshalli
 * †Parallelodon
 * †Parallelodon truncatus – or unidentified related form
 * †Paramillerella
 * †Paramillerella inflecta
 * †Paramillerella pressa
 * †Paranacyathus
 * †Paranevadella
 * †Paraorthograptus
 * †Paraorthograptus pacificus
 * †Paraorthograptus uniformis
 * †Paraparchites
 * †Paraparchites cyclopeus – or unidentified related form
 * †Paraparchites nickelsi – or unidentified comparable form
 * †Paraperrinites
 * †Paraperrinites subcumminsi – type locality for species
 * †Parapholidostrophia – type locality for genus
 * †Parapholidostrophia harperi – type locality for species
 * †Paraplegmatograptus
 * †Paraplegmatograptus uniformis
 * †Paraporcellia
 * †Paraporcellia rohri
 * †Parapoulsenia
 * †Parapoulsenia lata – or unidentified comparable form
 * †Parapugnax
 * †Parapugnax bactrianense – type locality for species
 * †Pararachnastraea
 * †Pararachnastraea illipahensis – type locality for species
 * †Pararachnastraea moormanensis – type locality for species
 * †Parareteograptus
 * †Parareteograptus parvus
 * †Parareteograptus sinensis
 * †Parareteograptus turgidus
 * †Pararhizophyllum – type locality for genus
 * †Pararhizophyllum parvulum – type locality for species
 * †Paraschmidtella – tentative report
 * †Parastringocephalus
 * †Parastrophina – tentative report
 * †Parathuramina
 * †Paratikhinella
 * †Parechidnina
 * †Parechidnina nevadensis – type locality for species
 * †Parenthatia
 * †Parethelocrinus
 * †Parethelocrinus rectilatus
 * †Pareuloma
 * †Parkaspis
 * †Parkaspis drumensis
 * †Parkula
 * †Parkula esmeraldina – type locality for species
 * †Paroistodus – tentative report
 * †Patellispongia
 * †Patellispongia brosiusae – type locality for species
 * †Patellispongia oculata
 * †Paterina
 * †Paterula
 * †Paterulus
 * †Patriaspirifer
 * †Patriaspirifer kobehana
 * †Paucicostella – tentative report
 * †Paucicrura
 * †Paucicrura cristifera
 * †Paucicrura subplana – or unidentified comparable form
 * †Paucispinifera – tentative report
 * Peachella iddingsi cropped.jpg †[[Peachella]]
 * †Peachella iddingsi
 * †Peelerophon – tentative report
 * †Pegmarhynchia
 * †Pelagiella
 * †Pelekygnathus
 * †Pelekygnathus linguiformis
 * †Pelekygnathus parawebbi
 * †Pelekygnathus pseudofoliatus
 * †Pelekygnathus xylus
 * †Pelekysgnathus
 * †Pelekysgnathus angustipennatus
 * †Pelekysgnathus eiflius
 * †Pelekysgnathus intermedius
 * †Pelekysgnathus linguiformis
 * †Pelekysgnathus parawebbi
 * †Pelekysgnathus pseudofoliatus
 * †Pelekysgnathus robusticostatus
 * †Pelekysgnathus trigonicus
 * †Peltabellia – tentative report
 * †Peniculauris
 * †Peniculauris ivesi
 * †Penniretepora
 * †Penniretepora oppositus
 * †Penniretepora trilineata
 * †Pentamerella
 * †Pentamerella davidsoni – or unidentified comparable form
 * †Pentamerella wintereri
 * †Pentamerifera
 * †Pentameroides
 * PentamerusSilurian.jpg †[[Pentamerus]]
 * †Pentaxocrinus
 * †Pentaxocrinus quinarius
 * †Pentlandella
 * †Pentlandia
 * †Pentlandia merriami – type locality for species
 * †Pentremites
 * †Peraspis
 * †Peraspis erugata
 * †Pericyclus
 * †Pericyclus antelopensis – type locality for species
 * †Pericyclus filaris
 * †Perimestocrinus
 * †Perimestocrinus nevadensis
 * †Perimestocrinus oasis
 * †Periodon
 * †Periodon aculeatus – tentative report
 * †Perischoclonus
 * †Perissopliomera
 * †Perissopliomera maclachlani
 * †Perissopyge
 * †Perissopyge triangulata
 * †Permastraea
 * †Permastraea biseptata – type locality for species
 * †Permastraea buttensis – type locality for species
 * †Permastraea campophylloides
 * †Permastraea nevadensis – type locality for species
 * †Permocalculus
 * †Permophorus
 * †Pernopecten
 * [[File:Itagnostus interstrictus - Wheeler Schale, Utah, USA - Cambrian period (≈ -507 MA) - 39.25°N 113.33°W .jpg|thumb|upright=0.767|Assemblage of fossils of the Cambrian trilobite [[Itagnostus|Itagnostus interstrictus]], until recently known as Peronopsis interstricta]] †Peronopsis
 * †Peronopsis amplaxis
 * †Peronopsis bonnerensis
 * †Peronopsis brighamensis
 * †Peronopsis fallax
 * †Peronopsis segmenta
 * †Perspicaris
 * †Peruvispira
 * †Peruvispira boreala – type locality for species
 * †Petalaxis
 * †Petalaxis elyensis – type locality for species
 * †Petalaxis exiguus
 * †Petalaxis mokomokensis – type locality for species
 * †Petalaxis occidentalis
 * †Petalocystites
 * †Petasmatherus
 * †Petasmatherus type locality for species A – informal
 * †Petigurus
 * †Petigurus inexpectatus
 * †Petrochus
 * †Petschoracrinus – tentative report
 * Phacops rana crassituberculata lateral.jpg †[[Phacops]]
 * †Phalacroma
 * †Phanocrinus – tentative report
 * †Phanocrinus insolitus
 * †Phenacocyclas
 * †Phestia
 * †Phestia perumbonata
 * †Phillipsia
 * †Phillipsia peroccidens
 * †Pholidostrophia
 * †Phormograptus
 * †Phormograptus conectus
 * †Phormograptus connectus
 * †Phragmodus
 * †Phragmodus undatus
 * Chaetoblack.png]] †Phragmophora''
 * †Phragmorthis
 * †Phragmorthis antiqua – type locality for species
 * †Phragmostrophia
 * †Phragmostrophia merriami – type locality for species
 * †Phrenophoria
 * †Phrenophoria type locality for species A – informal
 * †Phrenophoria type locality for species B – informal
 * †Phricodothyris
 * †Phricodythyris
 * †Phricodythyris perplexa
 * †Phrycodothyris
 * †Phrycodothyris perplexa
 * †Phyllocystis
 * †Phyllodictya
 * †Phyllodictya crystallaria – or unidentified comparable form
 * Phyllograptidae - Phyllograptus species cropped.jpg †[[Phyllograptus]]
 * †Phyllograptus anna
 * †Physalidopisthia – tentative report
 * †Picnotreta
 * †Picnotreta lophocracenta
 * †Pilekia – tentative report
 * †Pinctus
 * Pinna
 * †Pinna innexpectans
 * †Pinnatulites
 * †Pinyonastraea
 * †Piochella
 * †Piochella peasleensis
 * †Plagioglypta
 * †Plagiura
 * †Plagiura extensa
 * †Plagiura minor
 * †Plagiura retracta
 * †Planoarchaediscus
 * †Platuzona – or unidentified comparable form
 * †Platybolbina
 * PlatycerasLoganOhio.jpg †[[Platyceras]]
 * †Platyceras trojani – type locality for species
 * †Platycrinites
 * †Platycrinus – tentative report
 * †Platyschisma
 * †Platystrophia
 * †Platyterorhynchus
 * †Platyterorhynchus russelli
 * †Platyworthenia
 * †Platyzona
 * †Plaxocrinus
 * †Plaxocrinus piutae
 * †Plectatrypa
 * †Plectatrypa imbricata – or unidentified comparable form
 * †Plectelasma
 * †Plectelasma type locality for species A – informal
 * †Plectelasma type locality for species B – informal
 * †Plectodina
 * †Plectodina florida
 * †Plectodina tenuis
 * †Plectogyra
 * †Plectogyra irregularis
 * †Plectogyra tumesepta
 * †Plectogyra tumula
 * †Plectorthis
 * †Plectorthis obesa
 * †Plectorthis perplexus
 * †Plectotrophia – tentative report
 * †Pleiopleurina
 * †Pleiopleurina anticlastica
 * †Plethopeltis
 * †Plethopeltis arbucklensis – or unidentified comparable form
 * †Plethoschisma
 * †Plethoschisma grandis
 * Pleurocystites squamosus.jpg †[[Pleurocystites]]
 * †Pleurograptus
 * †Pleurograptus lui
 * †Pleurorima
 * †Pleurorima hoffmannae – type locality for species
 * †Pleurorthis
 * †Pleurorthis beattyensis
 * †Pleurosiphonella
 * †Plicatolina
 * †Plicocyathus
 * †Plicocyathus rozanovi
 * †Plicoplasia
 * †Plicoplasia cooperi
 * †Pliomeroides
 * †Pliomerops
 * †Pliomerops canadensis – or unidentified comparable form
 * †Plummericrinus
 * †Plummericrinus bulbosus
 * †Plummericrinus jelli
 * †Polidevcia
 * †Polidevcia arctura – type locality for species
 * †Polidevcia bellistriata
 * †Polidevcia obesa
 * †Poliella
 * †Poliella denticulata
 * †Poliella germana
 * †Poliella leipalox – type locality for species
 * †Poliella leipolox
 * †Poliella lomataspis
 * †Poliella ovala
 * †Poliella prima – or unidentified comparable form
 * †Poliellaites
 * †Poliellaites gloriosa
 * †Politicurus – tentative report
 * †Politicurus politus – or unidentified related form
 * †Polusocrinus
 * †Polusocrinus amplus
 * †Polygnathus
 * †Polygnathus abbessensis
 * †Polygnathus angusticostatus
 * †Polygnathus angustipennatus – or unidentified comparable form
 * †Polygnathus bagialensis
 * †Polygnathus benderi
 * †Polygnathus bultyncki
 * †Polygnathus costatus
 * †Polygnathus damelei – type locality for species
 * †Polygnathus eiflius
 * †Polygnathus gronbergi
 * †Polygnathus holynensis – type locality for species
 * †Polygnathus linguiformis
 * †Polygnathus parawebbi
 * †Polygnathus pseudofoliatus
 * †Polygnathus robertensis – type locality for species
 * †Polygnathus salixensis – type locality for species
 * †Polygnathus serotinus
 * †Polyplucograptus
 * †Polypora
 * †Polypora keyserlingiformis – type locality for species
 * †Polypora remota
 * †Polypora sargaensis
 * †Polyporella
 * †Polyporella helgersonia – type locality for species
 * †Polythalamia – type locality for genus
 * †Polythalamia americana – type locality for species
 * †Pontisia
 * †Pontisia boodi
 * †Porcellia
 * †Porcellia denayi
 * †Poronileus
 * †Poronileus fistulosus
 * †Poronileus vallancei
 * †Porosublastus
 * †Porosublastus inexpectus
 * †Posidonia
 * †Posidonia becheri
 * †Poteriocrinites
 * †Poteriocrinites permicus
 * †Praedaraelites
 * †Praedaraelites loeblichi
 * †Praenatica
 * †Praewaagenoconcha
 * †Prasopora
 * †Prehousia
 * †Prehousia alata
 * †Prehousia impolita
 * †Prehousia indenta
 * †Prehousia prima
 * †Prehousia semicircularis
 * †Presbynileus
 * †Presbynileus ibexensis
 * †Primaspis
 * †Prioniodina – tentative report
 * †Priscella
 * †Proaulopora
 * †Prodentalium
 * †Prodentalium canna
 * †Productella
 * †Proehmaniella
 * †Proehmaniella hebes – tentative report
 * Proetus concinnus reconstruction cropped.png †[[Proetus (trilobite)|Proetus]]
 * †Profallotaspis – tentative report
 * †Profusulinella
 * †Profusulinella copiosa
 * †Profusulinella decora
 * †Prolecanites
 * †Prolecanites lyoni
 * †Promytilus
 * †Proplina
 * †Proplina propina – or unidentified comparable form
 * †Protathyris
 * †Protathyris hesperalis
 * †Protocalymene
 * †Protocalymene mcallesteri
 * †Protochonetes
 * †Protochonetes elyensis – type locality for species
 * †Protocortezorthis
 * †Protocortezorthis windmillensis – type locality for species
 * †Protoentactinia
 * †Protoentactinia gracilispinosa – type locality for species
 * †Protoentactinia latospinosa – type locality for species
 * †Protoentactinia minuta – type locality for species
 * †Protopanderodus
 * †Protopanderodus insculptus
 * †Protopharetra
 * †Protopharetra arcybata – type locality for species
 * †Protopharetra junensis
 * †Protopliomerops
 * †Protopresbynileus
 * †Protopresbynileus glaber – or unidentified comparable form
 * †Protopresbynileus wildeni
 * †Protospongia
 * †Protospongia conica
 * †Protospongia spina – type locality for species
 * †Prototreta
 * †Protowentzelella
 * †Protowentzelella cystosa – type locality for species
 * †Protowentzelella kunthi – type locality for species
 * †Protowentzelella variabilis – type locality for species
 * †Protozyga – tentative report
 * †Psalikilus
 * †Psalikilus pikum
 * †Psephosthenaspis
 * †Psephosthenaspis ellipsepyga
 * †Psephosthenaspis glabrior
 * †Psephosthenaspis pseudobathyurus
 * †Pseudagnostus
 * †Pseudagnostus communis
 * †Pseudagnostus contracta – type locality for species
 * †Pseudagnostus josephus
 * †Pseudedriophus
 * †Pseudedriophus guensburgi
 * †Pseudoammodiscus
 * †Pseudoatrypa – tentative report
 * †Pseudoatrypa percrassa
 * †Pseudobatostomella
 * †Pseudobatostomella irregularis – type locality for species
 * †Pseudobelodina
 * †Pseudobelodina inclinata
 * †Pseudobelodina kinki
 * †Pseudobelodina vulgaris
 * †Pseudocybele
 * †Pseudocybele altinasuta
 * †Pseudocybele lemurei
 * †Pseudocybele nasuta
 * †Pseudocystophora
 * †Pseudocystophora complexa
 * †Pseudoendothyra
 * †Pseudofusulinella
 * †Pseudofusulinella dunbari
 * †Pseudofusulinella jeffordsi – type locality for species
 * †Pseudofusulinella pusilla – type locality for species
 * †Pseudofusulinella rotunda
 * †Pseudohystricurus
 * †Pseudokingstonia
 * †Pseudokingstonia exotica
 * †Pseudomera
 * †Pseudomera arachnopyge
 * †Pseudomera barrandei
 * †Pseudomonotis
 * †Pseudoneotodus
 * †Pseudoneotodus beckmanni
 * †Pseudoneotodus mitratus
 * †Pseudoolenoides
 * †Pseudoolenoides acicaudus
 * †Pseudoolenoides dilectus – or unidentified comparable form
 * †Pseudooneotodus
 * †Pseudooneotodus mitratus
 * †Pseudoparazyga
 * †Pseudoparazyga cooperi
 * †Pseudoreichelina
 * †Pseudorthoceras
 * †Pseudosaratogia
 * †Pseudosaratogia abnormis
 * †Pseudosaratogia leptogranulata
 * †Pseudostaffella
 * †Pseudostaffella needhami
 * †Pseudosyrinx
 * †Pseudosyrinx desiderata
 * †Pseudotaxis
 * †Pseudovermiporella
 * †Pseudozaphrentoides
 * †Pseudozaphrentoides hanseni
 * †Pseudozaphrentoides trojana – type locality for species
 * †Pseudozygopleura
 * †Ptarmiganoides
 * †Ptarmiganoides araneicauda – type locality for species
 * †Ptarmiganoides crassaxis
 * †Ptarmiganoides hexacantha
 * †Ptarmiganoides lepida – tentative report
 * †Ptarmiganoides propinqua
 * †Pterinopecten
 * †Pterinopecten spio
 * †Pterocephalia
 * †Pterocephalia concava
 * †Pterocephalia elongata
 * †Pterocephalia punctata
 * †Pterocephalia sanctisabae
 * Ptychagnostus Germanus.jpg †[[Ptychagnostus]]
 * †Ptychagnostus atavus
 * †Ptychagnostus intermedius
 * †Ptychagnostus seminula
 * †Ptychomphalina
 * †Ptychomphalina type locality for species – informal
 * †Ptychophyllum – tentative report
 * †Ptychopleurella
 * †Ptychopleurites
 * †Ptychopleurites bevifrons – or unidentified comparable form
 * †Ptyocephalus
 * †Ptyocephalus accliva
 * †Ptyocephalus vigilans
 * †Pugilator
 * †Pugilator deckeri
 * †Punctaparchites
 * †Punctospirifer
 * †Punctospirifer gnomus – type locality for species
 * †Punctospirifer kentuckensis
 * †Punctospirifer kentuekyensis
 * †Punka
 * †Punka caecata
 * †Pycnostylus

Q

 * †Quadratia
 * †Quadratia hirsutiformis
 * †Quadratonucula
 * †Quadratonucula stella – type locality for species
 * †Quadricarina
 * †Quadricarina glabrobasis
 * †Quadricarina type locality for species A. – informal
 * †Quadrithyris
 * †Quadrithyris minuens – or unidentified comparable form
 * †Quadrithyris vijaicus – or unidentified comparable form
 * †Quadrochonetes
 * †Quadrochonetes type locality for species A – informal
 * †Quasimodaspis
 * †Quasimodaspis brentsae

R

 * †Radiastraea
 * †Radiastraea arachne
 * †Radiastraea nevadensis
 * †Radiastrea
 * †Radiatrypa
 * †Radiatrypa advena
 * †Radiatrypa klukasi
 * †Rafinesquina
 * †Raphistoma
 * †Raphistoma gubanovi
 * †Raymondaspis
 * †Raymondaspis vespertina
 * †Raymondella
 * †Raymondella nevadensis
 * †Raymondensis – tentative report
 * †Raymondites – tentative report
 * †Rayonnoceras
 * KimmswickOzoraMidOrdReceptaculitid.jpg †[[Receptaculites]]
 * †Rectifenestella
 * †Rectifenestella cordiretiformis – type locality for species
 * †Rectifenestella tenax
 * †Rectograptus
 * †Rectograptus abbreviatus
 * †Remopleurides
 * †Remopleurides similus – or unidentified comparable form
 * †Remopleurides simulus – or unidentified comparable form
 * †Renalcis
 * †Rensselaeria
 * †Rensselaerina
 * †Rensselandia
 * †Rensselandia cloudi – type locality for species
 * †Repinaella
 * †Resserella
 * †Reteporidra
 * †Reteporidra anaphora
 * †Reticulariina
 * †Reticularina
 * †Reticularina campestris
 * †Reticularina spinosa
 * †Reticulariopsis
 * †Retilamina
 * †Retilamina debrennei
 * †Retispira
 * †Retispira albapinensis
 * †Retispira nolani – type locality for species
 * †Rhabdiferoceras – type locality for genus
 * †Rhabdiferoceras annuliferum – type locality for species
 * †Rhabdocyclus
 * †Rhabdocyclus depressus
 * †Rhabdomeson
 * †Rhipidomella
 * †Rhipidomella carbonaria
 * †Rhipidomella elyensis
 * †Rhipidomella nevadensis
 * †Rhipidothyris
 * †Rhipidothyris circo – type locality for species
 * †Rhizophyllum
 * †Rhizophyllum inornatum
 * †Rhombifera
 * †Rhombopora
 * †Rhombopora cornwallis
 * †Rhombotrypella
 * †Rhombotrypella regularis
 * †Rhombotrypella sunfloweria
 * †Rhynchocamara
 * †Rhynchocamara breviplicata – or unidentified comparable form
 * †Rhynchocamara sublaevis
 * †Rhynchopora
 * †Rhynchopora taylori
 * †Rhynchospirina
 * †Rhynoleichus
 * †Rhynoleichus weeksi
 * †Rhysostrophia
 * †Rhysostrophia nevadensis
 * †Rhysostrophia occidentalis
 * †Rhyssochonetes
 * †Rhyssochonetes solox
 * †Rimmyjimina
 * †Rioceras – tentative report
 * †Robergia
 * †Robergiella
 * †Rossaspis
 * †Rossoceras
 * †Rossodus – tentative report
 * †Rossodus tenuis
 * †Rostranteris
 * †Rostranteris type locality for species A – informal
 * †Rotopericyclus
 * †Rotopericyclus pinyonensis – type locality for species
 * †Roundya
 * †Rousseauspira
 * †Rousseauspira teicherti
 * †Ruedemannoceras
 * †Rugatia
 * †Rugatia occidentalis – or unidentified comparable form
 * †Rugocoelia – type locality for genus
 * †Rugocoelia eganensis – type locality for species
 * †Rugosochonetes

S

 * †Sabellidites
 * †Sabellidites canadiensis
 * †Saffordophyllum
 * †Sagittodontus
 * †Sagittodontus robustus – tentative report
 * †Sallya
 * †Salopina
 * Salterella pulchella.png †[[Salterella]]
 * †Sandolasma
 * †Sandolasma buttense – type locality for species
 * †Sandolasma elegans
 * †Sandolasma hillae – type locality for species
 * †Sandolasma perplexa – type locality for species
 * †Sanguinolites
 * †Sanguinolites salteri
 * †Sansabella – tentative report
 * †Scabbardella
 * †Scabbardella altipes
 * †Scandodus
 * †Scandodus unicostatus
 * †Scaphorthis
 * †Sceptropora
 * †Sceptropora faculum
 * †Schedexocrinus
 * †Schistometopus
 * †Schizambon
 * †Schizodus
 * †Schizodus curtiformis
 * †Schizodus semistriatus – or unidentified comparable form
 * †Schizophoria
 * †Schizophoria depressa
 * †Schizophoria fascicostella – or unidentified comparable form
 * †Schizophoria mcfarlanei
 * †Schizophoria nevadaensis
 * †Schizophoria parafragilis – type locality for species
 * †Schizophoria simpsoni
 * †Schizophoria texana
 * †Schizoporia
 * †Schizoporia resupinoides
 * †Schizoporia texana
 * †Schmidtella
 * †Schmidtites – tentative report
 * †Schubertella
 * †Schubertella kingi
 * †Schuchertella
 * †Schwagerina
 * †Schwagerina jeffordsi – type locality for species
 * †Schwagerina munda – type locality for species
 * †Schwagerina rotunda
 * †Scinocephalus
 * †Scinocephalus solitecti – or unidentified related form
 * †Sciophyllum
 * †Scolopodus
 * †Scolopodus insculptus
 * †Scotiaecystis – tentative report
 * †Scotoharpes
 * †Secuicollacta
 * †Secuicollacta stelligera – type locality for species
 * †Selenimyalina
 * †Semizona
 * †Semizona glindmeyeri
 * †Septabrunsiina
 * †Septaglomospiranella
 * †Septatrypa
 * †Septimyalina
 * †Septimyalina burmai
 * †Septopora
 * †Septopora alternata
 * †Septopora bilateralis
 * †Serpulospira
 * †Serpulospira annulatus – or unidentified comparable form
 * †Serpulospira swickae
 * †Severella
 * †Shamovella
 * †Shastalasma
 * †Shastalasma woodi – type locality for species
 * †Shoshonorthis
 * †Shoshonorthis swanensis – or unidentified comparable form
 * †Shumardia
 * †Shumardia exopthalmus
 * †Siderocyathus – type locality for genus
 * †Siderocyathus duncanae – type locality for species
 * †Sieberella
 * †Sieberella problematica – or unidentified comparable form
 * †Sieberella pyriforma – type locality for species
 * †Sigmocheilus
 * †Sigmocheilus flabellifer
 * †Sigmocheilus grata
 * †Sigmocheilus notha
 * †Sigmocheilus pogonipensis
 * †Simulolenus
 * †Simulolenus granulatus
 * †Simulolenus quadrisulcatus
 * †Sinotubuites
 * †Sinotubuites cienegensis
 * †Sinuites
 * Siphonodendron400.JPG †[[Siphonodendron]]
 * †Siphonodendron sinousum – or unidentified comparable form
 * †Siphonodendron sinuosum – or unidentified comparable form
 * †Siphonodendron whitneyi – or unidentified comparable form
 * †Siphonodendrum
 * †Siphonodendrum sinuosum – or unidentified comparable form
 * †Sivorthis
 * †Sivorthis eucharis
 * †Sivorthis occidentalis
 * †Skenidioides
 * †Skenidioides oklahomensis
 * †Skenidium
 * †Skenidium asellatum – or unidentified comparable form
 * †Skippella
 * †Soleniscus
 * †Sowerbyella
 * †Sowerbyella merriami
 * †Sowerbyella perplexa – or unidentified comparable form
 * †Sowerbyites
 * †Spathognathodus
 * †Spathognathodus minutus – or unidentified comparable form
 * †Spencia
 * †Spencia quadrata – type locality for species
 * †Sphaerirhynchia
 * Cyanobacteria - Sphaerocodium kokeni cropped.jpg †[[Sphaerocodium]]
 * †Sphaerocoryphe
 * †Sphenosteges
 * †Sphenosteges hispidus
 * †Sphenothallus
 * †Sphenotreta
 * †Sphenotreta sulcata – or unidentified comparable form
 * †Spinatrypa
 * †Spinatrypa aspera – or unidentified comparable form
 * †Spinatrypa soetenica – or unidentified comparable form
 * †Spinatrypina
 * †Spinatrypina angusticostata
 * †Spinatrypina comitata – or unidentified comparable form
 * †Spinatrypina lamellosa
 * †Spinatrypina recula – type locality for species
 * †Spinella
 * †Spinella talenti – type locality for species
 * †Spinoplasia
 * †Spinoplasia roeni – type locality for species
 * †Spinulicosta
 * †Spinulicosta muirwoodi
 * Spirifer perlamosus pedunculate valve.jpg †[[Spirifer]]
 * †Spirifer arkansanus – or unidentified comparable form
 * †Spirifer centronatus
 * †Spirifer haydenianus – or unidentified related form
 * †Spirifer occidus
 * †Spirifer opimus
 * †Spirifer pellaensis – tentative report
 * †Spirifer rockymontanus
 * †Spiriferella
 * †Spiriferella scobina – type locality for species
 * †Spiriferellina
 * †Spiriferellina campestris
 * †Spiriferellina ceres
 * †Spiriferellina lata
 * †Spiriferina
 * †Spirigerina
 * †Spirigerina supramarginalis
 * †Spirinella
 * †Spirinella pauciplicata
 * †Spirocyathella – tentative report
 * †Spirocyathella microporosa – type locality for species
 * †Spirodentalium
 * †Spirodentalium walcotti – type locality for species
 * Spirorbis spirorbis Scotland.jpg [[Spirorbis]]
 * †Spongophyllum
 * †Spygoria – type locality for genus
 * †Spygoria zappania – type locality for species
 * †Squamaria
 * †Squameofavosites
 * †Stachyodes
 * †Staffella
 * †Staffella expansa
 * †Staufferella
 * †Stauromatidium
 * †Stegnopsis
 * †Stegocoelia
 * †Stelechophyllum – tentative report
 * †Stellahexaformis – type locality for genus
 * †Stellahexaformis gersterensis – type locality for species
 * †Stellarocrinus
 * †Stellarocrinus comptus
 * †Stellarocrinus cuneatus
 * †Stenambon
 * †Stenambon megagranulus
 * †Stenambon paucigranulus
 * †Stenodiscus
 * †Stenodiscus murdockensis – type locality for species
 * †Stenoglaphyrites
 * †Stenoglaphyrites hesperius
 * †Stenoglaphyrites merriami
 * †Stenoloron
 * †Stenoloron minor
 * †Stenopecrinus – tentative report
 * †Stenopecrinus xerophilus
 * †Stenopora
 * †Stenopora parvaexozona – type locality for species
 * †Stenothecoides
 * †Stephenaspis
 * †Stephenaspis avitus – type locality for species
 * †Stephenaspis highlandensis
 * †Stereodictyum
 * †Stereodictyum proteron – type locality for species
 * †Stereolasma
 * †Stereostylus
 * †Stereostylus compressum
 * †Stibaraster
 * †Stictoporella
 * Lycopsid joggins mcr1.JPG †[[Stigmaria]]
 * †Stigmaria wedingtonensis
 * †Strachanognathus
 * †Strachanognathus parvus
 * †Straparollus
 * †Straparollus caementarius
 * †Straparollus lonemountainensis
 * †Straparollus spergenensis – or unidentified related form
 * †Streblochondria
 * †Streblopteria
 * †Streblopteria similis
 * †Streblotrypa
 * †Streblotrypa elongata – type locality for species
 * †Streptacis
 * †Streptelasma
 * †Streptelasma prolongatum
 * †Streptognathodus
 * †Streptognathodus unicornis
 * †Streptorhynchus
 * †Streptosolen
 * †Streptosolen mccafferyi – type locality for species
 * †Streptosolen nodosus – type locality for species
 * †Streptosolen occidentalis
 * †Strianematina
 * †Striatifera
 * †Striatopora
 * †Strigambitus
 * †Strigambitus bilobus
 * †Strigambitus transversus
 * †Strigambitus utahensis
 * †Strigigenalis
 * †Stringocephalus
 * †Stringocephalus nevadensis – type locality for species
 * †Strobeus
 * †Stromatopora
 * †Strombodes
 * †Stropheodonta
 * †Stropheodonta filicosta
 * †Stropheodonta magnacosta – type locality for species
 * †Stropheodontida
 * †Strophochonetes
 * Strophomena costellata brachial.jpg †[[Strophomena]]
 * †Strophonella
 * †Strophonella bohemica – or unidentified comparable form
 * †Strophonella punctulifera – or unidentified comparable form
 * †Strophostylus
 * †Strophostylus nevadensis – type locality for species
 * †Strophostylus tantillus – type locality for species
 * †Stuartwellercrinus
 * †Stuartwellercrinus corbatoi
 * †Stummelasma
 * †Stummelasma antelopense
 * †Stummelasma lonense
 * †Stummelasma sulfurense – type locality for species
 * †Stygina – tentative report
 * †Styliolina
 * †Stylonema – tentative report
 * †Stylopleura
 * †Stylopleura berthiaumi
 * †Stylopleura nevadensis
 * †Styracograptus
 * †Styracograptus mississippiensis
 * †Styracograptus tatianae
 * †Subrensselandia
 * †Subrensselandia nolani
 * †Subrensselendia
 * †Subretepora
 * †Subulites
 * †Sulcoretepora
 * †Sulcoretepora corticata
 * †Sulcoretepora irregularis
 * †Sychnoelasma
 * †Sychnoelasma alrichanum – or unidentified comparable form
 * †Sychnoelasma ulrichanum – or unidentified comparable form
 * †Symphysurina
 * †Symphysurina walcotti
 * †Synarmocrinus
 * †Synarmocrinus brachiatus – type locality for species
 * †Syndielasma
 * †Syndielasma biseptatum
 * †Syngastrioceras
 * †Synprioniodina – tentative report
 * †Syntrophina – tentative report
 * †Syntrophopsis
 * †Syntrophopsis polita
 * †Synyphocrinus
 * †Synyphocrinus permicus
 * †Syringaxon
 * Syringoporid.jpg †[[Syringopora]]
 * †Syringopora surcularia
 * †Syringostroma
 * †Syspacephalus
 * †Syspacephalus crassus
 * †Syspacephalus laticeps – or unidentified comparable form
 * †Syspacephalus longus
 * †Syspacephalus uncus – tentative report
 * †Syspacephalus variosus – type locality for species

T

 * †Tabulipora
 * †Tabulipora carbonaria – type locality for species
 * †Tabulipora hispida
 * †Tabulophyllum
 * †Taenora
 * †Taenora expansa
 * †Tancrediopsis
 * †Tancrediopsis cuneata – or unidentified related form
 * †Taphrodonta
 * †Taphrodonta parallela
 * †Tapinotomaria
 * †Tecnocyrtina
 * †Tecnocyrtina fissiplicata
 * †Tecnocyrtina missouriensis
 * †Tegerocyathus
 * †Tegerocyathus edelsteini
 * †Teichertina
 * †Teichertina americana – type locality for species
 * †Teichertina fitzroyensis
 * †Teiichispira
 * †Teiichispira auricula – type locality for species
 * †Telephina
 * †Temnocheilus
 * †Temnophyllum
 * †Temnophyllum waltheri – type locality for species
 * †Tentaculites
 * Graptolite tetragraptus cropped.jpg †[[Tetragraptus]]
 * †Tetragraptus bigsbyi
 * †Tetraprioniodus – tentative report
 * †Tetraprioniodus costatus
 * †Tetrataxis
 * †Tetrataxis angusta
 * †Texacrinus
 * †Texacrinus distortus
 * †Thamniscus
 * †Thamniscus erraticus – type locality for species
 * †Thamnopora
 * †Thamnopora limitaris
 * †Thamnosia
 * †Thamnosia depressa
 * Thoracocare max enlarged.jpg †[[Thoracocare]]
 * †Thoracocare idahoensis
 * †Tikhinella
 * †Timaniella
 * †Timaniella pseudocamerata – or unidentified comparable form
 * †Timanodictya
 * †Timanodictya dichotoma – or unidentified comparable form
 * †Toernquistia – tentative report
 * †Tonkinaria
 * †Tonkinaria simpsoni
 * †Tonkinella
 * †Tonkinella breviceps
 * †Tonkinella valida
 * †Tonopahella – type locality for genus
 * †Tonopahella goldfieldensis – type locality for species
 * †Toquimaella
 * †Toquimaella kayi – type locality for species
 * †Toquimaphyllum
 * †Toquimaphyllum johnsoni
 * †Toquimaphyllum sentum – type locality for species
 * †Toquimaphyllum vulgare – type locality for species
 * †Toquimia
 * †Toquimia kirki
 * †Tortodus
 * †Tortodus australis
 * †Tortodus kockelianus
 * †Torynifer
 * †Torynifer internascens – or unidentified comparable form
 * †Totiglobus – type locality for genus
 * †Totiglobus nimius – type locality for species
 * †Trachycheilus
 * †Trachycheilus whirlwindensis
 * †Trachydomia
 * †Trachyspira
 * †Trampidocrinus
 * †Trampidocrinus bellicus
 * †Trampidocrinus phiola
 * †Trematopora
 * †Trematorthis
 * †Trematorthis tenuis
 * †Trematospira
 * †Trematospira perforata
 * †Trepospira
 * Triarthrus becki.jpg †[[Triarthrus]]
 * †Trichonodella
 * †Trichonodella barbara – or unidentified comparable form
 * †Trigonirhynchia
 * †Trigonirhynchia occidens
 * †Trigonocerca
 * †Trigonocerca typica
 * †Trigrammaria
 * †Trinodus
 * †Tritoechia
 * †Tritoechia sinuata
 * †Trocholites
 * †Trochonema – tentative report
 * †Tropidodiscus
 * †Trupetostroma
 * †Tryplasma
 * †Tryplasma duncanae
 * †Tryplasma radicula
 * †Tschussovskenia
 * †Tschussovskenia connorsensis – type locality for species
 * †Tschussovskenia dilata
 * †Tuberitina
 * †Tumicephalus
 * †Tumicephalus depressus
 * †Turbonitella
 * †Turbonitella biserialis – or unidentified related form
 * TuzoiaCanadensis-ROM-June11-10.jpg †[[Tuzoia]]
 * †Tyersella
 * †Tylonautilus
 * †Tylothyris
 * †Tympanuella
 * †Tympanuella transversa

U

 * †Ufimia
 * †Undispirifer
 * †Uraloceras
 * †Uraloceras burtiense
 * †Uraloceras involutum
 * †Uraloceras nevadense – type locality for species
 * †Uromystrum
 * †Uromystrum validum – or unidentified comparable form
 * †Ursinella – type locality for genus
 * †Ursinella major – type locality for species
 * †Utharocrinus

V

 * †Vagrania
 * †Vagrania gronbergi
 * †Valcourea
 * †Valcourea intracarinata
 * †Valcourea plana
 * †Valcourea transversa
 * †Vallomyonia
 * †Vallomyonia claudiae
 * †Vallomyonia devonica
 * †Varatrypa
 * †Vargania
 * †Vargania gronbergi
 * †Variatrypa
 * †Variatrypa exoleta
 * †Variatrypa licta – type locality for species
 * †Varvia – tentative report
 * †Verpaspongia – type locality for genus
 * †Verpaspongia nodosa – type locality for species
 * †Verticillopora
 * †Vesiculophyllum
 * †Vesperispira – type locality for genus
 * †Vesperispira humboldtiana – type locality for species
 * †Vidronovella
 * †Vidronovella fastigiata
 * †Virgiana
 * †Virgiana utahensis – type locality for species
 * †Volocephalina
 * †Volocephalina connexa
 * †Volocephalina variosa – type locality for species
 * †Volocphalina
 * †Volocphalina variosa – type locality for species

W

 * †Waagenella
 * †Waagenella vespertinus – type locality for species
 * †Waagenites
 * †Waagenites type locality for species A – informal
 * †Waagenites type locality for species B – informal
 * †Waagenoconcha – tentative report
 * †Walliserodus
 * †Walliserodus amplissimus
 * †Walliserodus curvatus
 * Wanneria walcottana negative CRF.jpg †[[Wanneria]]
 * †Wanneria walcottana – or unidentified comparable form
 * †Warburgella
 * †Warburgella rugulosa
 * †Warrenella
 * †Warrenella franklinii
 * †Warrenella kirki
 * †Warrenella nevadensis
 * †Warrenella occidentalis
 * †Warrenella plicata
 * †Warrenella praekirki
 * †Watsonella
 * †Weirchellatia
 * †Wellerella
 * †Wellerella delicatula – or unidentified comparable form
 * †Wellerella osagensis
 * †Wellerella truncata
 * †Wendoverella – type locality for genus
 * †Wendoverella arca – type locality for species
 * †Wenkchemnia
 * †Wenkchemnia sulcata
 * †Wenkchemnia walcotti
 * †Westergaardites
 * †Westmontia
 * †Westmontia devilensis
 * †Weyerides – tentative report
 * †Whittingtonia – tentative report
 * †Wilberrya
 * †Wilberrya fragilis
 * †Williamicyathus
 * †Wilsonastraea
 * †Wilsonastraea fraseri – type locality for species
 * †Wilsonastraea parva – type locality for species
 * †Wilsonastraea smithi
 * †Wimanella – tentative report
 * †Winchellatia
 * †Wjatkella
 * †Wjatkella hemiseptifera – type locality for species
 * †Wjatkella permiana
 * †Worthenia
 * †Worthenia corrugata
 * †Wujiajiania
 * †Wujiajiania sutherlandi
 * †Wutinoceras
 * †Wutinoceras huygenae – or unidentified comparable form

X

 * †Xenelasma – tentative report
 * †Xenocheilos
 * †Xenocheilos granulosus
 * †Xenostegium
 * †Xenostegium franklinense – or unidentified comparable form
 * †Xestotrema
 * †Xestotrema pulchrum – type locality for species
 * †Xystocrania
 * †Xystocrania perforator
 * †Xystocrania pyriformis – type locality for species

Y

 * †Yakovlevia
 * †Yakovlevia multistriata – type locality for species
 * †Yinograptus
 * †Yinograptus disjunctus
 * †Yochelsonospira
 * †Yochelsonospira tenuilineata
 * Yoldia
 * †Youngia – tentative report
 * †Yuknessaspis
 * †Yuknessaspis benningtonis
 * †Yunnania

Z

 * †Zacanthoides
 * †Zacanthoides alatus – or unidentified comparable form
 * †Zacanthoides demissus
 * †Zacanthoides divergensis
 * †Zacanthoides variacantha
 * †Zacanthoides walapai
 * †Zacanthopsina – type locality for genus
 * †Zacanthopsina eperephes – type locality for species
 * †Zacanthopsis
 * †Zacanthopsis contractus – type locality for species
 * †Zacanthopsis levis
 * †Zelophyllum – tentative report
 * †Zonophyllum
 * †Zonophyllum lonense
 * †Zonophyllum robertsense
 * †Zygognathus
 * †Zygospira