List of the Mesozoic life of Texas

This list of the Mesozoic life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas and are between 252.17 and 66 million years of age.

A

 * Acanthoceratidae - Acanthoceras rhotomagensis.JPG †[[Acanthoceras (ammonite)|Acanthoceras]]
 * †Acanthoceras adkinsi
 * †Acanthoceras amphibolum
 * †Acanthoceras barcusi
 * †Acanthoceras eulessanum
 * †Acanthoceras johnsonanum
 * †Acanthoceras tarrantense
 * †Acanthoceras tarrantense nitidum
 * †Acanthoceras wintoni
 * †Acanthoceras worthense
 * Acesta
 * †Acesta sayeri
 * †Acesta sayrei
 * Acila
 * †Acila chicotana
 * Acirsa
 * †Acirsa flexicostata – tentative report
 * Acmaea
 * †Acmaea occidentalis
 * †Acmaea pilleolus
 * †Acompsoceras
 * Acrocantosaurus4.jpg †[[Acrocanthosaurus]]
 * †Acrocanthosaurus atokensis
 * †Acrosmilia
 * Acteon
 * †Acteon nitidus – tentative report
 * †Acteon throckmortoni
 * †Acteonella
 * †Acteonella delgadoi
 * †Acteonella pecosensis
 * †Acteonella sublaevis – or unidentified comparable form
 * †Actinacis
 * †Actinacis valverdensis – type locality for species
 * †Actinastrea
 * †Actinastrea guadalupae
 * †Actinostreon
 * †Actinostreon gregareum
 * †Acutostrea
 * †Acutostrea plumosa
 * Adelobasileus cromptoni.jpg †[[Adelobasileus]] – type locality for genus
 * †Adelobasileus cromptoni – type locality for species
 * †Adinodon
 * †Adinodon pattersoni – type locality for species
 * †Adkinsella – type locality for genus
 * †Adkinsella edwardsensis – type locality for species
 * †Adkinsia
 * †Adkinsia bosquensis – type locality for species
 * †Adkinsia knikerae – type locality for species
 * †Adocus
 * †Aenona
 * †Aenona eufaulensis
 * †Aetodactylus – type locality for genus
 * †Aetodactylus halli – type locality for species
 * †Agerostrea
 * †Agerostrea mesenterica
 * †Aguileria
 * †Aguileria cumminsi
 * †Agujaceratops
 * †Agujaceratops mariscalensis – type locality for species
 * †Akera
 * †Akera constricta
 * Perot Museum Alamosaurus and Tyrannosaurus.jpg †[[Alamosaurus]]
 * †Alamosaurus sanjuanensis
 * †Albanerpeton
 * †Albanerpeton arthridion – type locality for species
 * †Albanerpeton gracilis
 * †Albanerpeton nexuosus
 * †Aliofusus
 * †Aliofusus balaniformis
 * †Aliofusus reagani
 * †Aliofusus reagani subtilis
 * †Aliofusus reagani tumidus
 * †Aliomactra
 * †Aliomactra compressa
 * †Alkaidia – type locality for genus
 * †Alkaidia sumralli – type locality for species
 * †Allocrioceras
 * †Allocrioceras annulatum
 * †Allocrioceras dentonense
 * †Allocrioceras larvatum
 * Alnus
 * †Alnus trina
 * Alphadon cropped.png †[[Alphadon]]
 * †Alphadon halleyi – or unidentified comparable form
 * †Alphadon perexiguus – type locality for species
 * †Altairia – type locality for genus
 * †Altairia wintoni
 * †Amaurellina
 * †Amaurellina stephensoni
 * †Ambigostrea
 * †Ambigostrea tecticosta
 * †Ambrosea
 * †Ambrosea nitida
 * Ammobaculites
 * †Ammobaculites subcretaceous
 * †Ammobaculites subcretaceus
 * Gastropoda - Ampullina sp.JPG †[[Ampullina]] – or unidentified comparable form
 * †Ampullina abnormalis
 * †Ampullina densatus
 * †Ampullina lirata
 * Amuletum
 * †Amuletum boylei
 * †Amuletum curvocostatum
 * †Amuletum venustum
 * Amusium
 * †Amusium danei – tentative report
 * †Anacolosidites
 * †Anaklinoceras
 * †Anaklinoceras reflexum
 * †Anatimya
 * †Anatimya anteradiata
 * †Anatimya anteradiata texana
 * †Anatimya eulessana
 * †Anatimya longula
 * †Anchura
 * †Anchura bexarensis
 * †Anchura caddoensis
 * †Anchura campbelli
 * †Anchura elegans
 * †Anchura hoggi
 * †Anchura lamari
 * †Anchura modesta
 * †Anchura noackensis
 * †Anchura noakensis – tentative report
 * †Anchura substriata
 * †Anchura turricula
 * †Anchura whitneyensis
 * †Ancilla
 * †Ancilla acutula
 * †Angistorhinus
 * †Angistorhinus alticephalus – type locality for species
 * †Angistorhinus grandis
 * Angulomastacator skull.png †[[Angulomastacator]] – type locality for genus
 * †Angulomastacator daviesi – type locality for species
 * †Anisoceras
 * †Anisoceras armatum
 * †Anisoceras perarmatum
 * †Anisomyon
 * †Anisomyon borealis – tentative report
 * †Anisomyon haydeni
 * †Anomalina
 * †Anomalina petita
 * †Anomalina torcerensis
 * †Anomalofusus
 * †Anomalofusus bellulus
 * †Anomalofusus lemniscatus
 * Anomia
 * †Anomia argentaria
 * †Anomia mexicana
 * †Anomia ornata
 * †Anomia ponticulana
 * †Anomia tellinoides
 * †Anomoeodus
 * †Anomotodon
 * †Anomotodon toddi – type locality for species
 * †Antillocaprina
 * †Apachesaurus
 * †Apachesaurus gregorii
 * †Aphrodina
 * †Aphrodina navarroana
 * †Aphrodina tippana
 * Aplousina
 * †Apsgnathus – type locality for genus
 * †Apsgnathus triptodon – type locality for species
 * †Aquilarhinus – type locality for genus
 * †Aquilarhinus palimentus – type locality for species
 * Arca
 * †Arca martindalensis
 * †Arca pergracilis
 * †Arca rostellata
 * †Arca securiculata
 * Architectonica
 * †Architectonica voragiformis
 * Arcopsis
 * †Arcopsis nolani
 * †Arctostrea
 * †Arctostrea falacata
 * †Areopsammia – type locality for genus
 * †Areopsammia bakerae – type locality for species
 * Chinle fish Arganodus cropped.png †[[Arganodus]]
 * †Arganodus dorotheae – type locality for species
 * Arrhoges
 * †Arrhoges cibolensis
 * †Arrhoges ciboloensis
 * †Arrhoges lobata media
 * †Arrhoges plenocosta
 * †Asciocythere
 * †Asciocythere rotunda
 * †Aspidoceras
 * †Aspidoceras laevigatum
 * †Astacodes
 * †Astacodes davisi
 * †Astacodes maxwelli
 * †Astandes
 * Astarte
 * †Astarte culebrensis
 * †Astarte malonensis
 * †Astartemya
 * †Astartemya fentressensis
 * Astrangia danae.jpeg [[Astrangia]]
 * †Astrangia cretacea
 * †Astrangia lamarensis – type locality for species
 * Astreopora – tentative report
 * †Astreopora leightoni – type locality for species
 * †Astrocoenia
 * †Astrocoenia budaensis – type locality for species
 * †Astrocoenia nidiformis
 * †Astrocoenia scyphoidea – type locality for species
 * †Astroconodon – type locality for genus
 * †Astroconodon denisoni – type locality for species
 * †Astrocratis – type locality for genus
 * †Astrocratis acutispina – type locality for species
 * Astrodon johnstoni.jpg †[[Astrodon]]
 * †Astrodon johnstoni
 * †Astrophocaudia – type locality for genus
 * †Astrophocaudia slaughteri – type locality for species
 * †Atreta
 * †Atreta minor
 * †Aulastraeopora – type locality for genus
 * †Aulastraeopora harrisi – type locality for species
 * †Axonoceras
 * †Axonoceras compressum
 * †Axonoceras multicostatum
 * †Axonoceras multicostatum rotundum
 * †Axonoceras pingue
 * †Axosmilia
 * †Axosmilia craginiana – type locality for species
 * †Axosmilia whitneyi – type locality for species

B

 * Baculites grandis shell.JPG †[[Baculites]]
 * †Baculites aquilaensis - or unidentified loosely related form
 * †Baculites claviformis
 * †Baculites haresi – or unidentified comparable form
 * †Baculites ovatus
 * †Baculites scotti
 * †Baculites taylorensis
 * †Baculites tippahensis
 * †Baculites undatus
 * †Baena – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Banis
 * †Banis siniformis
 * Barbatia – tentative report
 * †Barbatia carolinensis
 * †Barroisiceras
 * Basilemys.jpg †[[Basilemys]]
 * †Bathycyathus – tentative report
 * †Bathycyathus lloydi – type locality for species
 * †Bathytormus
 * †Bathytormus pteropsis
 * †Belemnitella
 * †Belemnitella americana
 * †Bellifusus
 * †Bellifusus angulicostatus – or unidentified related form
 * †Bellifusus buffaloensis
 * †Bellifusus coronatus
 * †Bellifusus crassicostatus
 * †Bellifusus deatsvillensis
 * †Bellifusus multicostatus
 * †Bellifusus robustus
 * †Bellifusus tennistriatus
 * †Belliscala
 * †Belliscala crideri
 * †Belliscala forbeyi
 * †Belliscala rockensis
 * †Belodon
 * †Belodon superciliosus – type locality for species
 * Belonostomus fossil cropped.png †[[Belonostomus]]
 * †Beretra
 * †Beretra contracta
 * †Beretra elongata
 * †Beretra firma
 * †Beretra ornatula
 * †Beretra ripleyana
 * †Beretra striata
 * Bernissartia_BW.jpg †[[Bernissartia]] – tentative report
 * †Betelgeusia – type locality for genus
 * †Betelgeusia reidi – type locality for species
 * †Borissiakoceras
 * †Borissiakoceras orbiculatum
 * †Bostrychoceras
 * †Bostrychoceras polyplocum
 * Botula
 * †Botula carolinensis
 * †Botula conchafodentis
 * †Botula plumosa
 * Brachauchenius cropped.png †[[Brachauchenius]]
 * †Brachauchenius lucasi
 * Brachidontes
 * †Brachidontes arlingtonanus
 * †Brachidontes filisculptus
 * †Brachidontes filisculptus microcostae
 * †Brachidontes fulpensis
 * Brachiodontes
 * †Brachychampsa
 * †Brachycythere – tentative report
 * †Brachycythere subconcentrica
 * †Brachyrhizodus – type locality for genus
 * †Brachyrhizodus wichitaensis – type locality for species
 * †Brachysuchus – type locality for genus
 * †Brachysuchus megalodon – type locality for species
 * Bravoceratops NT small.jpg †[[Bravoceratops]] – type locality for genus
 * †Bravoceratops polyphemus – type locality for species
 * †Breviarca
 * †Breviarca grandis
 * †Breviarca habita
 * †Breviarca minor
 * †Breviarca nolani
 * †Breviarca plummeri
 * †Brontopodus – type locality for genus
 * †Brontopodus birdi – type locality for species
 * †Buccinopsis
 * †Buccinopsis crassa
 * †Buccinopsis crassicostata
 * †Buccinopsis crassus
 * †Buccinopsis globosa
 * †Buccinopsis greenensis
 * †Buccinopsis perryi
 * †Buccinopsis solida
 * †Budaia – type locality for genus
 * †Budaia travisensis – type locality for species
 * †Budaiceras
 * †Budaiceras alticarinatum
 * †Budaiceras elegantior
 * †Budaiceras hyatti
 * †Burckhardtites
 * †Burckhardtites palmensis
 * Busycon – tentative report

C

 * Cadulus
 * †Cadulus coonensis
 * †Cadulus obnutus
 * †Cadulus praetenuis
 * Caestocorbula
 * †Caestocorbula crassaplica
 * †Caestocorbula crassiplica
 * †Caestocorbula suffalciata
 * †Caestocorbula terramaria
 * †Caestocorbula torta
 * †Caestocorbula williardi
 * Callianassa
 * †Calliomphalus
 * †Calliomphalus americanus
 * †Calliomphalus bellulus
 * †Calliomphalus microcancelli
 * Callistina
 * †Callistina alta
 * †Callistina lamarensis
 * †Callistina munda
 * †Callistina taffi
 * †Callodus – type locality for genus
 * †Callodus coronatus – type locality for species
 * Callucina
 * †Callucina chatfieldana
 * †Callucina oleodorsum
 * †Callucina seminalis
 * †Calyptosuchus – type locality for genus
 * †Calyptosuchus wellesi – type locality for species
 * Calyptraea chinensis 001.jpg [[Calyptraea]]
 * †Camptonectes
 * †Camptonectes bellisculptus
 * †Camptonectes bubonis
 * †Camptonectes burlingtonensis
 * †Camptonectes cavanus
 * †Camptonectes ellsworthensis
 * †Camptonectes kaufmanensis
 * †Camptonectes martinsensis
 * Cancellaria
 * †Cancellaria matroni – tentative report
 * †Cantabrigites
 * †Cantabrigites spinosum
 * †Cantabrigites subsimplex – or unidentified related form
 * Cantharus – tentative report
 * †Cantioscyllium
 * †Cantioscyllium meyeri – type locality for species
 * †Capellia – type locality for genus
 * †Capellia mauricei – type locality for species
 * Caprinidae - Caprina adversa.JPG †[[Caprina]]
 * †Caprina coraloidea
 * †Caprina douvillei
 * †Caprinuloidea
 * †Caprinuloidea multitubifera
 * †Caprinuloidea perfecta
 * Capulus
 * †Capulus cuthandensis
 * †Capulus erectus
 * †Capulus microstriatus – tentative report
 * †Capulus spangleri
 * Carcharias taurus.jpg [[Carcharias]]
 * †Carcharias heathi – type locality for species
 * †Carcharias holmdelensis
 * †Carcharias samhammeri – or unidentified comparable form
 * †Cardiaster
 * †Cardiaster leonensis
 * Cardium
 * †Cardium wadei
 * †Caririchnium
 * †Caririchnium protohadrosaurichnos – type locality for species
 * Carota
 * †Carota biplicata
 * †Carota pendula
 * †Carota robusta
 * †Carycorbula
 * †Carycorbula martinae
 * Caryocorbula
 * †Caryocorbula ovisana
 * †Caryocorbula tradingensis
 * †Caryocorbula varia
 * Caryophyllia2610.jpg [[Caryophyllia]]
 * †Caryophyllia comanchei – type locality for species
 * †Caryophyllia dentonensis – type locality for species
 * †Caryophyllia konincki – type locality for species
 * †Caseosaurus – type locality for genus
 * †Caseosaurus crosbyensis – type locality for species
 * †Casierius
 * †Casierius heckeli
 * †Casierius heckelii
 * †Catactegenys – type locality for genus
 * †Catactegenys solaster – type locality for species
 * †Catastomocystis
 * †Catastomocystis spinosa
 * Caturidae - Caturus furcatus.JPG †[[Caturus]]
 * †Caveola
 * †Caveola acuta – tentative report
 * †Caveola bellsana
 * †Caveola producta
 * †Cedarosaurus
 * †Cedarosaurus weiskopfae
 * †Cenomanocarcinus
 * †Cenomanocarcinus refroae
 * †Cenomanocarcinus renfroae
 * †Cenomanocarcinus vanstraeleni
 * Ceratodus.jpg †[[Ceratodus (genus)|Ceratodus]]
 * †Ceratodus americanus – or unidentified comparable form
 * Ceratotrochus – tentative report
 * †Ceriopora
 * Cerithiella
 * †Cerithiella nodoliratum – or unidentified related form
 * †Cerithiella semirugatum
 * Cerithium
 * †Cerithium simpsonensis
 * †Chamops
 * †Champsosaurus
 * †Chartecytis
 * †Cheloniceras
 * †Cheloniceras adkinsi
 * †Cheloniceras cornuelianum
 * Chindesaurus bryansmalli.png †[[Chindesaurus]]
 * †Chindesaurus bryansmalli
 * †Chinlea
 * †Chinlea sorenseni
 * †Chirostenotes
 * †Chondrodonta
 * †Chondrodonta glabra
 * †Chondrodonta munsoni
 * †Chondrodonta youngi – type locality for species
 * †Chupacabrachelys – type locality for genus
 * †Chupacabrachelys complexus – type locality for species
 * Cidaris
 * †Cidaris hemigranosus
 * †Cidaris texanus
 * †Cimexomys
 * †Cimoliasaurus
 * OrnitocheiridsDB.jpg †[[Cimoliopterus]]
 * †Cimoliopterus dunni – type locality for species
 * †Cimolodon
 * †Cimolodon electus – or unidentified comparable form
 * †Cimolomys
 * †Cimolomys clarki
 * †Cinulia
 * †Cinulia tarrantensis – or unidentified related form
 * †Cionichthys
 * †Cionichthys greeni – type locality for species
 * †Citharina
 * †Citharina kochii
 * †Cladoceramus
 * †Cladoceramus undulatoplicatus
 * †Cladophyllia
 * †Cladophyllia furcifera
 * †Clavipholas
 * †Clavipholas pectorosa
 * †Clavipholas whitfieldi
 * †Clevosaurus – or unidentified comparable form
 * †Clevosaurus latidens
 * Clidastes proph1DB.jpg †[[Clidastes]]
 * †Clidastes liodontus
 * Cliona
 * †Cliona microtuberum
 * †Cliona retiformis
 * †Clisocolus
 * †Clisocolus concentricum
 * †Coahomasuchus – type locality for genus
 * †Coahomasuchus kahleorum – type locality for species
 * †Coahuilites – tentative report
 * †Coalcomana
 * †Coalcomana ramosa
 * †Codiopsis
 * †Codiopsis stephensoni – type locality for species
 * †Coelodus
 * †Coelodus decaturensis – type locality for species
 * †Coelodus fabadens – type locality for species
 * Coelophysis size.jpg †[[Coelophysis]]
 * †Coelosmilia
 * †Coelosmilia americana
 * †Coelosmilia texana
 * †Coilopoceras
 * †Coilopoceras springeri
 * †Collignoniceras
 * †Collignoniceras woollgari
 * †Colognathus – type locality for genus
 * †Colognathus obscurus – type locality for species
 * †Colombiceras
 * †Colombiceras robustum
 * †Columbiceras
 * †Columbiceras robustus
 * †Comptoniaster
 * †Comptoniaster adamsi
 * †Confusiscala – tentative report
 * †Coniasaurus
 * †Coniasaurus crassidens
 * †Connectastrea – tentative report
 * †Connectastrea infundibuliformis – type locality for species
 * Conopeum
 * †Continuoolithus
 * †Conulus
 * †Conulus stephensoni – type locality for species
 * †Convolosaurus – type locality for genus
 * †Convolosaurus marri – type locality for species
 * Masijimi 01.jpg [[Corbicula]]
 * Corbula
 * †Corbula amniculana
 * †Corbula dentonensis
 * †Corbula inflata
 * †Corbula linteroidea
 * †Corbula ponsana
 * †Corbula pulvinata
 * †Corbula rockensis
 * †Corbula senecta
 * †Corbula starana
 * †Corbula subradiata
 * †Corbula subradiata texana
 * †Corbula torta – or unidentified related form
 * †Corbula williardi – tentative report
 * †Corbula woodi
 * †Coskinolinoides
 * †Coskinolinoides texanus
 * †Costellacesta
 * †Costellacesta sayrei
 * †Coupatezia
 * †Coupatezia turneri – type locality for species
 * †Craginia
 * †Craginia turriformis
 * Crassatella
 * †Crassatella hodgei
 * †Crassatella quinlanensis
 * †Crassatella vadosa
 * †Crassatella vadosa bexarensis
 * †Crassatella vadosa cedarensis
 * †Crassatella vadosa chatfieldensis
 * †Crassatella vadosa manorensis
 * Crassostrea gigantissima (Finch, 1824).JPG [[Crassostrea]]
 * †Crassostrea cortex
 * †Crassostrea cusseta
 * †Crassostrea trigonalis
 * †Crateraster
 * †Crateraster quinqueloba
 * †Crateraster texensis
 * †Crenella
 * †Crenella elegantula
 * †Crenella serica
 * †Crenella subcircularis
 * †Creonella
 * †Creonella deusseni
 * †Creonella triplicata
 * †Creonella whitei
 * †Cretacoranina
 * †Cretacoranina dichrous
 * Cretolamna.jpg †[[Cretolamna]]
 * †Cretolamna appendiculata
 * †Cretolamna maroccana
 * †Cretorectolobus
 * †Cretorectolobus olsoni – or unidentified comparable form
 * †Crosbysaurus – type locality for genus
 * †Crosbysaurus harrisae – type locality for species
 * Ctena
 * †Ctena parvilineata
 * Cucullaea labiata 3.JPG [[Cucullaea]]
 * †Cucullaea blanpiedi
 * †Cucullaea capax
 * †Cucullaea deatvillensis
 * †Cucullaea kingsensis
 * †Cucullaea murrayi
 * †Cucullaea powersi
 * †Cuna
 * †Cuna texana
 * †Curtocaprina – type locality for genus
 * †Curtocaprina clabaughikinsorum – type locality for species
 * Cuspidaria
 * †Cuspidaria alaeformis
 * †Cuspidaria ampulla
 * †Cuspidaria grandis
 * †Cuspidaria grovensis
 * †Cyathomorpha – tentative report
 * †Cyathomorpha damoni – type locality for species
 * †Cyathophora
 * †Cyathophora haysensis – type locality for species
 * †Cyathophora olssoni – type locality for species
 * †Cyclorisma
 * †Cyclorisma orbiculata
 * †Cyclorisma parva
 * †Cyclorisma pumila
 * †Cyclothyris
 * †Cyclothyris americana
 * Cylichna
 * †Cylichna incisa
 * †Cylichna secalina
 * Nautilaceae - Cymatoceras subalbensis.JPG †[[Cymatoceras]]
 * †Cymatoceras hilli – or unidentified comparable form
 * †Cymatoceras texanum
 * †Cymbophora
 * †Cymbophora appressa
 * †Cymbophora berryi
 * †Cymbophora cancellosa
 * †Cymbophora inflata
 * †Cymbophora puteana
 * †Cymbophora saccellana
 * †Cymbophora scabellum
 * †Cymbophora schucherti
 * †Cymbophora securis
 * †Cymbophora simpsonensis
 * †Cymbophora spooneri
 * †Cymbophora subtilis
 * †Cymbophora wordeni
 * †Cymella
 * †Cymella bella
 * †Cymella bella texana
 * †Cymella ironensis
 * †Cypridae
 * †Cypridae wyomingensis – or unidentified related form
 * †Cyprimeria
 * †Cyprimeria alta
 * †Cyprimeria coonensis
 * †Cyprimeria depressa
 * †Cyprimeria patella
 * Cythere
 * †Cythere concentrica
 * †Cythereis
 * †Cythereis dentonensis
 * †Cythereis hawleyi
 * †Cythereis nuda
 * †Cythereis ornatissima
 * †Cythereis paupera
 * †Cythereis pustulosissima
 * †Cythereis worthensis
 * Cytherella
 * †Cytherella comanchensis
 * Cytherelloidea
 * †Cytherelloidea reticulata
 * †Cytherelloidea williamsoniana
 * Cytheropteron
 * †Cytheropteron rugosalatum
 * Cyzicus – tentative report
 * †Cyzicus shupei

D

 * Dallasaurus CGI cropped.jpg †[[Dallasaurus]] – type locality for genus
 * †Dallasaurus turneri – type locality for species
 * †Darwinula
 * Dasmosmilia
 * †Dasmosmilia kochii – type locality for species
 * Dasyatis
 * †Dasyatis commercensis – type locality for species
 * †Dathmila
 * †Dathmila lineola
 * †Dawsonius
 * †Dawsonius tigris
 * Deinosuchus hatcheri - Natural History Museum of Utah - DSC07251.JPG †[[Deinosuchus]]
 * †Deinosuchus riograndensis
 * †Deinosuchus rugosus – type locality for species
 * †Deltaichthys
 * †Deltaichthys albuloides
 * †Dendrosmilia – tentative report
 * †Dendrosmilia texana
 * †Denebia – type locality for genus
 * †Denebia americana
 * Dentalina
 * †Dentalina communis
 * Dentalium
 * †Dentalium inornatum
 * †Dentalium leve
 * †Dentalium minor
 * †Dentalium navarroi
 * †Dentalium pauperculum
 * †Dentalium sublineatum
 * †Dentalium vaughani
 * †Dentonia
 * †Dentonia leveretti
 * Desmatosuchus spurensis.jpg with an anachronistic human to scale]] †Desmatosuchus''
 * †Desmatosuchus haplocerus
 * †Desmatosuchus smalli – type locality for species
 * †Desmatosuchus spurensis – type locality for species
 * †Desmoceras
 * †Deussenia
 * †Deussenia bellalirata
 * †Deussenia ciboloensis
 * †Deussenia corbis
 * †Deussenia multilirae
 * †Deussenia travisana
 * †Dhondtichlamys
 * †Dhondtichlamys venustus
 * †Dichastopollenites
 * †Dictyoconus
 * †Dictyoconus walnutensis
 * †Dimorpharaea
 * †Dimorpharaea manchacaensis – type locality for species
 * †Dimorphastrea
 * †Dimorphastrea stantoni – type locality for species
 * †Dinogymnium
 * †Dinogymnium acuminatum
 * †Dinogymnium euclaense
 * Diodora – tentative report
 * †Diodora bartonvillensis
 * Diphydontosaurus cropped.jpg †[[Diphydontosaurus]] – or unidentified related form
 * †Diploastrea
 * †Diploastrea harrisi – type locality for species
 * †Diploastrea hilli – type locality for species
 * †Diploastrea vaughani – type locality for species
 * †Diplolonchidion – type locality for genus
 * †Diplolonchidion murryi – type locality for species
 * †Diplomoceras
 * †Diplomoceras trabeatus
 * †Discofascigera
 * Discorbis
 * †Discorbis correcta
 * †Discorbis minima
 * †Discoscaphites
 * †Discoscaphites conradi
 * †Discoscaphites erucoideus
 * †Distefanella – or unidentified comparable form
 * !-- Doswellia: Automatic taxobox --> †Doswellia
 * †Douvilleiceras
 * †Douvilleiceras grandense
 * †Douvilleiceras mammillatum
 * †Douvilleiceras offarcinatum – or unidentified comparable form
 * †Douvilleiceras orbignyi – or unidentified comparable form
 * †Douvilleiceras quitmanense
 * †Douvilleiceras rex
 * †Douvilleiceras spathi
 * †Douvillelia – tentative report
 * †Douvillelia skeltoni
 * Dreissena polymorpha2.jpg †[[Dreissena]]
 * †Dreissena tippana
 * †Drepanocheilus
 * †Drepanocheilus corbetensis
 * †Drepanocheilus cuthandensis
 * †Drepanocheilus texanus
 * †Drepanochilus
 * †Drepanochilus corbetensis
 * †Drepanochilus davidsi
 * †Drepanochilus martini
 * †Drepanochilus texanus
 * †Drepanochilus triliratus
 * †Drilluta
 * †Drilluta brevispira
 * †Drilluta crassicostata
 * †Drilluta crassicostata longa
 * †Drilluta distans
 * †Drilluta major – or unidentified comparable form
 * †Drilluta paucicostata
 * Dromomeron BW.jpg †[[Dromomeron]]
 * †Dromomeron gregorii – type locality for species
 * †Dryptosaurus
 * †Dufrenoyia
 * †Dufrenoyia justinae
 * †Dufrenoyia rebeccae
 * †Durania

E

 * †Echinocorys
 * †Echinocorys texanus
 * †Ecoacteon
 * †Ecoacteon linteus
 * †Ecphora
 * †Ecphora proquadricostata
 * Ectenosaurus clidastoides skeleton.png †[[Ectenosaurus]]
 * †Edmontonia – or unidentified comparable form
 * †Elea – tentative report
 * †Elephantaria
 * †Elephantaria simondsi – type locality for species
 * †Ellipsoscapha
 * †Ellipsoscapha mortoni
 * †Ellipsoscapha striatella
 * Enchodus petrosus cropped.png †[[Enchodus]]
 * †Endoplocytia
 * †Endoptygma
 * †Endoptygma leprosa
 * †Endostoma
 * †Endostoma mexicana – or unidentified comparable form
 * †Engonoceras
 * †Engonoceras complicatum
 * †Engonoceras elegans
 * †Engonoceras gibbosum
 * †Engonoceras hilli
 * †Engonoceras retardum
 * †Engonoceras serpentinum
 * †Engonoceras stolleyi
 * †Engonoceras subjectum – or unidentified related form
 * †Enoploclytia
 * †Enoploclytia triglypta
 * †Enoploclytia wintoni
 * †Entolium
 * †Eoacteon
 * †Eodouvilleiceras
 * †Eomunidopsis
 * †Eomunidopsis limonitica
 * Eonavicula
 * †Eonavicula newspecies1
 * †Eonavicula rostellata
 * †Eoradiolites
 * †Eoradiolites davidsoni
 * †Eosiderastrea
 * †Eosiderastrea cuyleri – type locality for species
 * †Eoursivivas
 * †Eoursivivas harveyi
 * †Epiaster
 * †Epiaster whitei
 * †Epiphaxum
 * †Epiphaxum labyrinthicum – type locality for species
 * †Episcoposaurus – type locality for genus
 * †Episcoposaurus haplocerus – type locality for species
 * †Epistomina
 * †Epistomina charlottae
 * †Epistomina lacunosa
 * †Epistreptophyllum
 * †Epistreptophyllum boesei – type locality for species
 * †Epistreptophyllum budaensis – type locality for species
 * †Epistreptophyllum shumardi – type locality for species
 * †Epitonium
 * †Epitonium sillimani
 * †Etea
 * †Etea corsicana
 * †Etea peasi
 * †Ethmocardium
 * †Ethmocardium welleri
 * †Eubaculites
 * †Eubaculites carinatus
 * Eubostrychoceras japonicum.jpg †[[Eubostrychoceras]]
 * †Eubostrychoceras reevesi
 * †Eucalycoceras
 * †Eucalycoceras templetonense – type locality for species
 * †Eufistulana
 * †Eufistulana ripleyana
 * †Eufistulina
 * †Eufistulina ripleyana
 * †Eugyra
 * †Eugyra cuyleri – type locality for species
 * †Euhoplites – tentative report
 * †Eulima
 * †Eulima clara
 * †Eulima laevigata
 * †Euomphaloceras
 * †Euomphaloceras alvaradoense
 * †Euomphaloceras lonsdalei
 * †Euomphaloceras septemseriatum
 * †Eupachydiscus
 * †Eupachydiscus grossouvrei
 * Euspira catena.jpg †[[Euspira]]
 * †Euspira dorothiensis
 * †Euspira dorothiensis pendula
 * †Euspira rectilabrum
 * †Euspira rectilabrum texanus
 * †Euspira rivulana
 * Euthriofusus – or unidentified related form
 * †Euthriofusus convexus
 * †Eutrephoceras
 * †Eutrephoceras dekayi
 * †Eutrephoceras perlatus
 * †Eutrephoceras planoventer
 * †Ewingia – type locality for genus
 * †Ewingia problematica – type locality for species
 * Exogyra costata Prairie Bluff Fm Maastrichtian.JPG †[[Exogyra]]
 * †Exogyra americana
 * †Exogyra arientina
 * †Exogyra cancellata
 * †Exogyra columbella
 * †Exogyra columbella levis
 * †Exogyra costata
 * †Exogyra costata spinifera
 * †Exogyra erraticostata
 * †Exogyra potosina
 * †Exogyra spinifera
 * †Exogyra texana

F

 * Fagesia spheroidalis.jpg †[[Fagesia]]
 * †Fagesia catinus
 * †Faraudiella
 * †Faraudiella franciscoensis
 * †Faraudiella roermeri
 * †Faujasia
 * †Faujasia chelonium – type locality for species
 * †Favia
 * †Favia texana
 * †Feldmannia
 * †Feldmannia wintoni
 * †Ficheuria
 * †Ficheuria pernoni – or unidentified related form
 * †Fictoacteon
 * †Fictoacteon alveolanus
 * †Fictoacteon humilispira
 * †Fictoacteon imlayi
 * †Fictoacteon saxanus
 * Filisparsa
 * †Flaventia
 * †Flaventia ludana
 * †Flemingostrea
 * †Flemingostrea pratti
 * †Flemingostrea subspatula
 * †Flemingostrea subspatulata
 * †Flexomornis – type locality for genus
 * †Flexomornis howei – type locality for species
 * †Flickia
 * †Flickia simplex – type locality for species
 * †Fomalhautia – type locality for genus
 * †Fomalhautia hortensae – type locality for species
 * †Forbesiceras
 * †Forbesiceras beaumontianum
 * †Forbesiceras brundrettei
 * †Forbesiceras conlini
 * †Forresteria
 * †Forresteria castellense – type locality for species
 * †Forresteria forresteri – type locality for species
 * †Forresteria sevierense – type locality for species
 * †Frenelopsis
 * †Frenelopsis ramosissima
 * †Fulgerca
 * †Fulgerca attenuata – or unidentified related form
 * †Fulgerca venusta
 * †Fulpia
 * †Fulpia pinguis
 * †Fungella
 * †Fuscinapedis – type locality for genus
 * †Fuscinapedis woodbinensis – type locality for species
 * †Fusimilis
 * †Fusimilis robustus
 * Fusinus monksae.jpg [[Fusinus]]
 * †Fusinus cornelianus
 * †Fusinus macnairyensis – or unidentified related form

G

 * Galeorhinus galeus SI3 cropped.jpg school shark]] Galeorhinus''
 * †Galeorhinus girardoti – or unidentified related form
 * †Gallolestes
 * †Gallolestes agujaensis – type locality for species
 * †Garramites
 * †Garramites nitidus
 * Gastrochaena
 * Gaudryina
 * †Gaudryina austinana
 * †Gaudryina cushmani
 * †Gaudryina ellisorae
 * Gegania
 * †Gegania manzaneti
 * †Geltena
 * †Geltena nitida
 * †Geltena obesa
 * †Geltena prunoides
 * †Geltena subcompressa
 * †Geltena subequilatera
 * †Geltena sybcompressa
 * †Gerdalia
 * Bakevelliidae - Gervillia inflata.JPG †[[Gervillia]]
 * †Gervillia bryani
 * †Gervillia wellsi – tentative report
 * †Gervilliopsis
 * †Gervilliopsis ensiformis
 * †Gervilliopsis ensiformis extensa
 * †Gervilliopsis invaginata
 * Ginglymostoma
 * †Glenrosa
 * †Glenrosa pagiophylloides
 * †Glenrosa texensis
 * †Globator
 * †Globator vaughani – type locality for species
 * Globidens dakotensis skull.jpg †[[Globidens]]
 * †Globidens dakotensis
 * Globigerina
 * †Globigerina cretacea
 * †Globigerina washitaensis
 * Glossus
 * †Glossus bulbosa
 * †Glossus hendersoni
 * †Glossus irelandi
 * †Glossus shumardi
 * †Glossus slatana
 * †Glossus slatana parva
 * Glycymeris
 * †Glycymeris rotundata
 * †Glycymeris rotundata kaufmanensis
 * Glyptops cropped.png †[[Glyptops]] – tentative report
 * †Glyptoxoceras
 * †Glyptoxoceras texanum
 * †Gobiates
 * †Goniochasma
 * †Goniochasma scaphoides
 * †Goniocylichna
 * †Goniophorus
 * †Goniophorus scotti
 * †Graciliala
 * †Graciliala calcaris
 * †Graciliala cooki
 * †Graciliala johnsoni – tentative report
 * †Grammatodon
 * †Grammatodon adkinsi
 * †Grammatodon bowiei
 * †Granocardium
 * †Granocardium bowenae
 * †Granocardium conradi
 * †Granocardium deltanum
 * †Granocardium dumosum
 * †Granocardium kuemmeli
 * †Granocardium kummeli
 * †Granocardium lowei
 * †Granocardium rossae
 * †Granocardium tholi
 * †Granocardium tippananum
 * †Graphidula
 * †Graphidula gabrielensis – tentative report
 * †Graphidula hoggi
 * †Graphidula lynnensis
 * †Graphidula multicostata
 * †Graphidula terebriformis
 * †Graptocarcinus
 * †Graptocarcinus texanus
 * †Graysonia
 * †Graysonia bergquisti
 * †Graysonites
 * †Graysonites adkinsi
 * †Graysonites wacoense
 * †Gryphaea
 * †Gryphaea aucella – or unidentified related form
 * †Gryphaea gibberosa
 * †Gryphaea marcoui
 * †Gryphaea pitcheri
 * †Gryphaea washitaensis
 * †Gryphaeostrea
 * †Gryphaeostrea vomer
 * Gryposaurus BW.jpg †[[Gryposaurus]] – tentative report
 * †Gryposaurus alsatei
 * †Guembelina
 * †Guembelina globulosa
 * †Guembelina paucistriata
 * †Gumbelina
 * †Gymnentome
 * †Gymnentome valida
 * †Gymnentome valida brevis
 * †Gypsichnites
 * †Gypsichnites titanopelopatidus
 * Gyrodes
 * †Gyrodes abyssinus
 * †Gyrodes americanus
 * †Gyrodes major
 * †Gyrodes petrosus
 * †Gyrodes rotundus
 * †Gyrodes spillmani
 * †Gyrodes subcarinatus
 * †Gyrodes supraplicatus
 * †Gyrodes tramitensis
 * †Gyronchus
 * †Gyronchus dumblei
 * †Gyrostrea
 * †Gyrostrea cortex

H

 * Haminoea navicula 001.jpg [[Haminoea]] – tentative report
 * †Haminoea simpsonensis
 * †Hamites
 * †Hamrabatis
 * †Hamrabatis weltoni – type locality for species
 * †Hamulus
 * †Hamulus huntensis
 * †Hamulus onyx
 * †Hamulus squamosus
 * †Haplostiche
 * †Haplostiche texana
 * †Haplovoluta
 * †Haplovoluta bicarinata
 * †Harduinia
 * †Harduinia bexari
 * †Harduinia dalli
 * †Harduinia mortonis
 * †Helicoceras
 * †Helicoceras navarroense
 * †Helopanoplia
 * Hemiaster
 * †Hemiaster benhurensis
 * †Hemiaster bexari
 * †Hemiaster jacksoni
 * †Hemiaster sabinal – type locality for species
 * †Hemiaster texanus
 * †Hemiaster wetherbyi
 * †Hemicalypterus – tentative report
 * †Hemicalypterus weiri
 * Hemicerithium
 * †Hemicerithium insigne
 * †Hemicerithium interlineatum
 * †Hercorhynchus
 * †Hercorhynchus malleiformis
 * †Hercorhyncus
 * †Hercorhyncus coronale
 * †Hercorhyncus malleiformis
 * †Hercorhyncus mundum
 * †Hercorhyncus nodosum
 * †Hercorhyncus tippanus
 * †Hercorhyncus vadosum
 * †Heterocoenia – tentative report
 * †Heterocoenia hilli – type locality for species
 * †Heterocoenia washitaensis – type locality for species
 * Heterodontus
 * †Heterodontus granti – type locality for species
 * † Heteromorpha
 * †Heteromorpha ammonite
 * Hexanchus griseus (Bluntnose sixgill shark).gif [[Hexanchus]]
 * †Hillites
 * †Hillites multilirae
 * †Hillites septarianus
 * †Hindeastraea
 * †Hindeastraea discoidea
 * †Holaster
 * †Holaster simplex
 * †Holoclemensia – type locality for genus
 * †Holoclemensia texana – type locality for species
 * Hoplopariabearpawensis cropped.jpg]] Homarus''
 * †Homarus brittonetris
 * †Homarus davisi
 * †Homarus travisensis
 * †Homoeosolen
 * †Homomya
 * †Homomya thrusheri – tentative report
 * †Hoplochelys
 * †Hoploscaphites
 * †Hoploscaphites pumilis
 * †Huetamia
 * †Huetamia buitronae
 * Hybodus NT.jpg --> †[[Hybodus]]
 * †Hybodus brevicostatus – or unidentified comparable form
 * †Hybodus butleri – type locality for species
 * †Hydnophora – tentative report
 * †Hydnophora styriaca – type locality for species
 * †Hydrotribulus
 * †Hydrotribulus asper
 * †Hylaeobatis – or unidentified comparable form
 * †Hylaeobatis ornata
 * †Hypacanthoplites
 * †Hypacanthoplites bakeri
 * †Hypacanthoplites chihuahuaensis
 * †Hypacanthoplites cragini
 * †Hypacanthoplites quitmanensis
 * †Hypacanthoplites rugosus
 * †Hypacanthoplites sellardsi
 * †Hypacanthoplites umbilicostatus
 * †Hypolophus
 * †Hypolophus mcnultyi – type locality for species
 * †Hypophylloceras
 * †Hypophylloceras tanit – or unidentified comparable form
 * †Hypoturrilites
 * †Hypoturrilites youngi

I

 * †Ichthyodectes
 * Ichthyornis restoration.jpeg †[[Ichthyornis]]
 * †Ichthyornis dispar
 * †Idoceras
 * †Idoceras clarki
 * †Idoceras schucherti
 * †Iguanodon – or unidentified comparable form
 * Inoceramus steenstrup, world's largest fossil mollusk.jpg †[[Inoceramus]]
 * †Inoceramus anomalus – or unidentified comparable form
 * †Inoceramus arnoldi
 * †Inoceramus arvanus
 * †Inoceramus balticus
 * †Inoceramus biconstrictus
 * †Inoceramus cordiformis – or unidentified comparable form
 * †Inoceramus cummingsi
 * †Inoceramus deformis
 * †Inoceramus dimidius
 * †Inoceramus eulessanus
 * †Inoceramus fragilis
 * †Inoceramus prefragilis
 * †Inoceramus vanuxemi – tentative report
 * †Irenesauripus
 * †Irenesauripus glenrosensis
 * †Isastrea
 * †Isastrea whitneyi – type locality for species
 * †Ischyrhiza
 * †Ischyrhiza avonicola
 * †Ischyrhiza mira
 * †Ischyrhiza monasterica – type locality for species
 * †Isomicraster
 * †Isomicraster danei
 * †Isomicraster rossi – type locality for species

J

 * Ammonite Jeletzkytes.jpg †[[Jeletzkytes]]
 * †Jeletzkytes brevis
 * Juliacorbula
 * †Juliacorbula linteroidea
 * †Juliacorbula monmouthensis

K

 * †Kamerunoceras
 * †Kamerunoceras calvertense
 * †Kamerunoceras eschii – or unidentified comparable form
 * †Kasanskyella
 * †Kasanskyella cuchillensis – tentative report
 * †Kasanskyella fosteri
 * †Kasanskyella spathi
 * †Kasanskyella whitneyi – tentative report
 * †Kazanskyella
 * †Kazanskyella cuchillense
 * †Kazanskyella fosteri
 * †Kazanskyella minima
 * †Kazanskyella trinitensis
 * †Kazanskyella whitneyi
 * †Kermackia – type locality for genus
 * †Kermackia texana – type locality for species
 * †Kimbleia
 * †Kimbleia albrittoni
 * †Kimbleia capacis
 * †Koskinonodon – type locality for genus
 * †Koskinonodon perfectus – type locality for species
 * Kritosaurus BW.jpg †[[Kritosaurus]]

L
†Leptorhynchos – type locality for genus
 * †Laevigyra
 * †Laevigyra dhondtae
 * †Lamellaerhynchia
 * †Lamellaerhynchia indi – type locality for species
 * †Lamellaerhynchia viae – type locality for species
 * Lamna nasus noaa.jpg [[Lamna]]
 * †Lamna sulcata – or unidentified related form
 * †Lanieria
 * †Lanieria uvaldana – type locality for species
 * †Lasalichthys
 * †Lasalichthys hillsi
 * Laternula
 * †Laternula bartoni
 * †Laternula johnsonana
 * †Laternula robusta
 * †Laternula sublevis
 * †Laternula sulcatina
 * †Laternula tofana
 * †Laternula virgata
 * †Latiala
 * †Latiala lobata
 * †Latiastrea
 * †Latiastrea whitneyi
 * Latiaxis mawae 5a.jpg [[Latiaxis]]
 * †Latiscopus – type locality for genus
 * †Latiscopus disjunctus – type locality for species
 * †Laxispira
 * †Laxispira lumbricalis
 * †Laxispira monilifera
 * †Legumen
 * †Legumen ellipticum
 * †Legumen ligula
 * Lenticulina
 * †Lenticulina cyprina
 * †Lenticulina gaultina
 * †Lepidotes
 * Lepisosteus
 * †Leptarbacia
 * †Leptarbacia argutus
 * Leptomaria
 * †Leptomaria austinensis
 * †Leptomaria robusta
 * †Leptorhynchos gaddisi – type locality for species
 * †Leptosolen
 * †Leptosolen angustus
 * †Leptosolen biplicata
 * †Leptosolen levis
 * †Leptosolen linguliformis
 * †Leptosolen quadrilaterus
 * †Leptosolen quadriliratus
 * †Leptostyrax
 * †Leptostyrax bicuspidatus
 * †Leptostyrax macrorhiza
 * Leptosuchus crosbiensis cropped.jpg †[[Leptosuchus]]
 * †Leptosuchus crosbiensis – type locality for species
 * †Leptosuchus imperfecta – type locality for species
 * †Leptosuchus studeri – type locality for species
 * †Levicerithium
 * †Levicerithium altum
 * †Levicerithium basicostae
 * †Levicerithium breviforme
 * †Levicerithium microlirae – tentative report
 * †Levicerithium planum
 * †Levicerithium timberanum
 * †Lewesiceras
 * †Lewyites
 * †Lewyites clinensis
 * †Leyvachelys
 * †Leyvachelys cipadi
 * †Libognathus – type locality for genus
 * †Libognathus sheddi – type locality for species
 * New Libonectes.jpg †[[Libonectes]]
 * †Libonectes morgani – type locality for species
 * Lima
 * †Lima acutilineata texana
 * †Lima coahuilensis
 * †Lima cokei
 * †Lima deatsvillensis
 * †Lima generosa
 * †Lima geronimioensis
 * †Lima geronimoensis
 * †Lima guadalupensis
 * †Lima pelagica
 * †Lima wacoensis
 * Limatula
 * †Limatula acutilineata
 * Limea
 * †Limea reticulata
 * Limopsis
 * †Limopsis meeki
 * †Linearia
 * †Linearia crebelli
 * †Linearis
 * †Linearis concentrica
 * †Linearis metastriata
 * †Linearis navarroana
 * †Linearis pectinis
 * †Linearis wieserae
 * Lingula
 * †Lingula subspatulata
 * †Linter
 * †Linter acutata
 * †Linthia
 * †Linthia variabilis
 * Linuparus trigonus (museum).jpg [[Linuparus]]
 * †Linuparus adkinsi
 * †Linuparus grimmeri
 * †Linuparus watkinsi
 * †Lioestheria – tentative report
 * †Liopeplum
 * †Liopeplum cretaceum
 * †Liopeplum eiodermum
 * †Liopeplum leioderma
 * †Liopeplum leioderma breve
 * †Liopeplum leioderma longum
 * †Liopeplum leioderma tabulatum
 * †Liopeplum rugosum
 * †Liopistha
 * †Liopistha alternata
 * †Liopistha formosa
 * †Liopistha protexta
 * †Liothyris
 * †Liothyris carolinensis – or unidentified comparable form
 * †Liothyris navarroana
 * Liquidambar – tentative report
 * †Lirosoma
 * †Lirosoma cretacea
 * †Lispodesthes
 * †Lispodesthes lirata
 * †Lispodesthes panda
 * †Lispodesthes patula
 * †Lissodus
 * †Lissodus babulski – or unidentified related form
 * Ataxioceratidae - Lithacoceras achilles.JPG †[[Lithacoceras]]
 * †Lithacoceras malonianum
 * Lithophaga
 * †Lomirosa
 * †Lomirosa cretacea
 * †Lonchidion
 * †Lonchidion anitae – type locality for species
 * †Lonchidion humblei – type locality for species
 * †Lonchidion selachos
 * †Longoconcha
 * †Longoconcha dalli
 * †Longoconcha navarroensis
 * Longosuchus.jpg †[[Longosuchus]]
 * †Longosuchus meadei – type locality for species
 * †Longosuchus meadi
 * Lopha
 * †Lopha falcata
 * †Lopha mesenterica
 * †Lopha subovata
 * †Loriolia
 * †Loriolia rosana
 * †Lowenstamia
 * †Lowenstamia subplanus – or unidentified comparable form
 * †Loxostomoides
 * †Loxostomoides cushmani
 * †Lucasuchus – type locality for genus
 * †Lucasuchus hunti – type locality for species
 * Lucina
 * †Lucina aspera
 * †Lucina chatfieldana
 * †Lucina dentonana
 * †Lucina glebula
 * †Lucina oleodorsum
 * †Lucina potosina
 * †Lucina seminolis
 * †Luisogalathea
 * †Luisogalathea cretacea
 * †Lupira
 * †Lupira pyriformis
 * †Lutema
 * †Lutema geniculata
 * †Lutema hubbardi
 * †Lutema munda
 * †Lutema simpsonensis
 * †Lycettia
 * †Lycettia tippana
 * †Lycettia tippanus
 * †Lyriochlamys – tentative report

M

 * †Macraster
 * †Macraster arguilera
 * †Macraster elegans
 * †Macraster nodopyda
 * †Macrepistius
 * †Macrocerithium
 * †Macrocerithium tramitense
 * †Macromesodon
 * †Macromesodon dumblei
 * †Magadiceramus
 * †Magadiceramus complicatus
 * †Magadiceramus crenelatus
 * †Magadiceramus crenistriatus – or unidentified comparable form
 * †Magadiceramus subquadratus
 * †Magnoavipes – type locality for genus
 * †Magnoavipes lowei – type locality for species
 * Malerisaurus BW.jpg †[[Malerisaurus]]
 * Malletia
 * †Malletia littlei
 * †Malletia longfrons
 * †Malletia longifrons
 * †Malletia stephensoni
 * †Mammites
 * †Mammites powelli – type locality for species
 * †Mantelliceras
 * †Mantelliceras cantianum
 * †Mantelliceras martimpreyi – or unidentified comparable form
 * †Mantelliceras saxbii
 * †Margaritella
 * †Margaritella pumila
 * Mariella lewesiensis.jpg †[[Mariella]]
 * †Mariella bosquensis
 * †Mariella brazoensis
 * †Mariella camachoensis
 * †Mariella cenomanensis – or unidentified comparable form
 * †Mariella davisense
 * †Mariella rhacioformis
 * †Mariella wysogorskii
 * Martinectes transparent background.png †[[Martinectes]]
 * †Martinectes bonneri
 * †Mataxa
 * †Mataxa subteres
 * †Mataxa valida
 * †Mataxa valida multilirae
 * †Mathilda
 * †Mathilda cedarensis
 * †Mathilda corona
 * †Meandraraea
 * †Meandraraea plummeri – type locality for species
 * †Meandraraea tulae – or unidentified comparable form
 * †Medionapus
 * †Medionapus elongatus
 * Megalomphalus – or unidentified comparable form
 * †Megalosauropus – tentative report
 * †Megalosauropus titanopelobatidus – type locality for species
 * Melanatria
 * †Melanatria venusta
 * †Melicertites
 * Membranipora
 * Membraniporidra
 * †Menabites
 * †Menabites austinensis
 * †Menabites danei
 * †Menabites delawarensis
 * †Menabites vanuxemi
 * Meniscoessus skull.jpg †[[Meniscoessus]]
 * †Menuites
 * Mesalia
 * †Mesalia shumardi
 * †Mesodma
 * †Mesomorpha
 * †Mesomorpha excavata
 * †Mesomorpha vaughani – type locality for species
 * †Metengonoceras
 * †Metengonoceras acutum
 * †Metengonoceras ambiguum
 * †Metengonoceras bravoense
 * †Metengonoceras dumbli
 * †Metengonoceras inscriptum
 * †Metoicoceras
 * †Metoicoceras crassicostae
 * †Metoicoceras geslinianum
 * †Metoicoceras latoventer
 * †Metoicoceras swallovi
 * †Metoicoceras swallovii
 * †Metoicoceras swallovii macrum
 * Metoposaurus size comparison with human.png †[[Metoposaurus]]
 * †Metoposaurus bakeri – type locality for species
 * †Metoposaurus fraasi
 * †Metoposaurus jonesi – type locality for species
 * †Metoposaurus perfecta
 * †Mexicaprina
 * †Mexicaprina cornuta
 * †Micrabacia
 * †Micrabacia marylandica
 * †Micrabacia radiata – type locality for species
 * †Micraster
 * †Micraster americanus
 * †Micraster uddeni – type locality for species
 * †Microsolena
 * †Microsolena texana – type locality for species
 * †Microsulcatoceras
 * †Microsulcatoceras texanum – type locality for species
 * †Miocardiopsis
 * †Miocardiopsis hendersoni
 * †Miocardiopsis shumardi
 * Mytilidae - Modiolus species.JPG, or horsemussel]] †Modiolus''
 * †Modiolus sedesclaris
 * †Modiolus sedesclarus
 * †Modiolus sedisclarus
 * Monodonta – tentative report
 * †Monodonta cancellosa
 * †Monopleura – tentative report
 * †Monroea
 * †Monroea castellana
 * Montastraea
 * †Montastraea comalensis
 * †Montastraea edwardsensis – type locality for species
 * †Montastraea pecosensis – type locality for species
 * †Montastraea roemeriana – type locality for species
 * †Montastraea texana
 * †Montastraea travisensis
 * †Montastraea whitneyi
 * †Morea
 * †Morea cancellaria
 * †Morea cancellaria corsicanensis
 * †Morea cancellaria crassa
 * †Morea marylandica
 * †Morea marylandica bella
 * †Morea marylandica languida
 * †Morea transenna
 * †Moremanoceras
 * †Moremanoceras elgini
 * †Moremanoceras flexuosum – type locality for species
 * †Morphastrea
 * †Morphastrea barcenai – or unidentified comparable form
 * †Mortoniceras
 * †Mortoniceras austinensis
 * †Mortoniceras drakei
 * †Mortoniceras maxima
 * †Mortoniceras minima
 * †Mortoniceras perinflatum
 * †Mortoniceras rostratum
 * †Mortoniceras wintoni
 * Mosasaurus BW.jpg †[[Mosasaurus]]
 * †Mosasaurus maximus
 * †Mosasaurus missouriensis – tentative report
 * †Muensterella
 * †Muensterella jillae – type locality for species
 * †Myobarbum
 * †Myobarbum laevigatum
 * †Myriophyllia – tentative report
 * †Myriophyllia dumblei – type locality for species
 * Myrtea
 * †Myrtea stephensoni
 * †Mytiloides
 * †Mytiloides columbianus
 * †Mytilus

N

 * †Naomichelys
 * †Napulus
 * †Napulus octoliratus
 * †Napulus tuberculatus
 * Natica crassa 01.JPG [[Natica]]
 * †Natica dorothiensis
 * †Natica humilis
 * †Natica rivulana
 * †Natica striaticostata
 * Nebrius
 * †Neithea
 * †Neithea bexarensis
 * †Neithea quinquecostata
 * †Nelltia
 * †Nelltia stenzeli
 * †Nemocardium
 * †Nemocardium fragile
 * †Nemocardium guadalupense
 * †Nemocardium marcosensis
 * †Nemocardium tenue
 * †Nemodon
 * †Nemodon adkinsi
 * †Nemodon bowiei
 * †Nemodon eufalensis
 * †Nemodon eufaulensis
 * †Nemodon eufaulensis lineatus
 * †Nemodon grandis
 * †Nemodon grandis navarroanus
 * †Nemodon martindalensis
 * †Nemodon navarroanus
 * †Nemodon punctus
 * †Neobrites
 * †Neobrites nodocostatus
 * †Neocardioceras
 * †Neocardioceras juddii
 * †Neodeshayesites
 * †Neodeshayesites comalensis
 * †Neodeshayesites mayfieldensis
 * †Neogauthiericeras
 * †Neogauthiericeras zafimahovai
 * [[File:Neohibolites sp., opalized belemnite, Late Early Cretaceous, Coober Pedy Formation, Coober Pedy, South Australia - Houston Museum of Natural Science - DSC01937.JPG|thumb|upright|Opalized guard of the belemnoid cephalopod Neohibolites]] †[[Neohibolites]]
 * †Neophlycticeras
 * †Neophlycticeras archerae – type locality for species
 * †Neophlycticeras blancheti – or unidentified comparable form
 * †Neophlycticeras fascicostatum – type locality for species
 * †Neophlycticeras roemeri
 * †Neophlycticeras texanum
 * †Neoptychites
 * †Nerinea – tentative report
 * Nerita
 * †Nerita ornata
 * †Nerita semilevis
 * Neritina-natalensis cropped.jpg [[Neritina]]
 * †Neritina ambrosana
 * †Neritina insolita
 * Nodosaria
 * †Nodosaria barkeri
 * †Nonactaeonina
 * †Nonactaeonina deflexa
 * †Nonactaeonina graphoides
 * †Nonactaeonina tensa
 * †Nonactaeonina triticea
 * †Nonaphalagodus – type locality for genus
 * †Nonaphalagodus trinitiensis – type locality for species
 * Nostoceras species cropped.jpg †[[Nostoceras]]
 * †Nostoceras approximans
 * †Nostoceras colubriformis
 * †Nostoceras draconsis
 * †Nostoceras helicinum crassum
 * †Nostoceras helicinum humile
 * †Nostoceras helicinus
 * †Nostoceras hyatti
 * †Nostoceras splendidum
 * †Nostoceras stantoni aberrans
 * †Nostoceras stantoni prematurum
 * †Notodonax
 * †Notopoides – tentative report
 * †Notopoides pflugervillensis – type locality for species
 * †Nucleopygus
 * †Nucleopygus texanus
 * Nuculidae - Nucula piacentina.jpg [[Nucula]]
 * †Nucula camia
 * †Nucula chatfieldensis
 * †Nucula chatsfieldensis
 * †Nucula ciboloensis
 * †Nucula cuneifrons
 * †Nucula microstriata
 * †Nucula nacatochana
 * †Nucula percrassa
 * †Nucula perequalis
 * †Nucula rivulana
 * †Nucula stantoni
 * †Nucula waltonensis
 * Nuculana
 * †Nuculana coloradoensis
 * †Nuculana corbetensis
 * †Nuculana corsicana
 * †Nuculana houstoni
 * †Nuculana mutuata
 * †Nuculana protexta
 * †Nuculana rostratruncata
 * †Nuculana travisana
 * †Nuculana whitfieldi
 * †Nudivagus – tentative report
 * †Nymphalucina
 * †Nymphalucina linearia
 * †Nymphalucina parva
 * †Nyssa

O

 * †Odaxosaurus
 * †Odaxosaurus piger
 * Odontaspis ferox 3.jpg [[Odontaspis]]
 * †Odontaspis aculeatus
 * †Ogilviastraea – tentative report
 * †Ogilviastraea richardsi – type locality for species
 * †Oklatheridium
 * †Oklatheridium minax
 * †Oklatheridium szalayi
 * †Oligoptycha
 * †Oligoptycha americana – tentative report
 * †Onchopristis
 * †Onchopristis dunklei
 * Sclerorhynchidae - Onchosaurus marocanus.JPG †[[Onchosaurus]]
 * †Opertochasma
 * †Opertochasma scaphoides
 * †Opertochasma subconicum
 * †Opertochasma venustum
 * †Ophiomorpha
 * †Ophiopsis – tentative report
 * Ophiura
 * †Ophiura graysonensis
 * †Ophiura texana
 * †Ophiura travisana – type locality for species
 * †Opis
 * †Opis elevata – tentative report
 * "Ornithomimus" sp. by Tom Parker.png †[[Ornithomimus]]
 * †Ornopsis
 * †Ornopsis digressa
 * †Ornopsis maxeyi
 * †Ornopsis pulchra
 * †Ornopsis solistella
 * †Ostlingoceras
 * †Ostlingoceras brandi
 * Oyster.jpg [[Ostrea]]
 * †Ostrea alternans
 * †Ostrea bella
 * †Ostrea beloiti
 * †Ostrea carica
 * †Ostrea carinata – or unidentified related form
 * †Ostrea crenulimargo
 * †Ostrea leveretti
 * †Ostrea lugubris
 * †Ostrea owenana
 * †Ostrea panda
 * †Ostrea rubradiata
 * †Ostrea soleniscus
 * †Ostrea subovata
 * †Ostrea subradiata
 * †Otischalkia – type locality for genus
 * †Otischalkia elderae – type locality for species
 * †Ovalastrea – type locality for genus
 * †Ovalastrea fredericksburgensis – type locality for species
 * †Ovalastrea pecosensis – type locality for species
 * †Oxyrhina
 * †Oxyrhina extenta
 * †Oxytropidoceras
 * †Oxytropidoceras acuticarinatum
 * †Oxytropidoceras acutocarinatum
 * †Oxytropidoceras bravoensis
 * †Oxytropidoceras carbonarium
 * †Oxytropidoceras diazi
 * †Oxytropidoceras moorei
 * †Oxytropidoceras multifidum
 * †Oxytropidoceras pandalense – or unidentified comparable form
 * †Oxytropidoceras powelli
 * †Oxytropidoceras salasi
 * †Oxytropidoceras stenzeli
 * †Oxytropidoceras supani
 * †Oxytropidoceras texanum
 * †Oxytropidoceras uddeni

P

 * †Pachycheilosuchus – type locality for genus
 * †Pachycheilosuchus trinquei – type locality for species
 * †Pachydesmoceras
 * †Pachydiscus
 * †Pachydiscus arkansanus
 * †Pachydiscus paulsoni
 * †Pachydiscus scotti
 * †Pachydiscus travisi
 * Pachygenelus.jpg †[[Pachygenelus]]
 * †Pachygenelus milleri – type locality for species
 * †Pachymelania
 * †Pachymya
 * Pagurus
 * †Pagurus travisensis
 * †Paladmete
 * †Paladmete alta
 * †Paladmete cancellaria
 * †Paladmete cancelleria
 * †Paladmete corbuliformis
 * †Paladmete elegans
 * †Paladmete gardnerae
 * †Paladmete inequalis
 * Pycnodontidae - Palaeobalistum goedeli.JPG †[[Palaeobalistum]]
 * †Palaeobalistum geiseri – type locality for species
 * †Palaeobalistum rectidens – type locality for species
 * †Palaeoctonus
 * †Palaeoctonus dumblianus – type locality for species
 * †Palaeoctonus orthodon – type locality for species
 * †Palaeocypraea
 * †Palaeocypraea corsicanana
 * †Palaeocypraea nuciformis
 * †Palaeogaleus
 * †Palaeogaleus navarroensis – type locality for species
 * †Paleollanosaurus – type locality for genus
 * †Paleollanosaurus fraseri – type locality for species
 * †Paleomolops
 * †Paleomolops langstoni – type locality for species
 * †Paleopsephaea
 * †Paleopsephaea decorosa
 * †Paleopsephaea patens
 * †Paleopsephaea sinuosa
 * †Paleopsephaea vadoana
 * Paleorhinus cropped.png †[[Paleorhinus]]
 * †Paleorhinus sawini – type locality for species
 * †Paluxysuchus – type locality for genus
 * †Paluxysuchus newmani – type locality for species
 * †Panis
 * †Panis cuneiformis
 * Panopea
 * †Panopea anacachoensis – type locality for species
 * †Panopea subplicata
 * †Pantojaloria
 * †Pantojaloria sphaerica
 * †Pappotherium – type locality for genus
 * †Pappotherium pattersoni – type locality for species
 * †Paracimexomys
 * Paracyprideis
 * †Paracyprideis graysonensis
 * Paracypris
 * †Paracypris alta
 * †Parafusus – tentative report
 * †Parahoplites
 * †Parahoplites thomasi
 * †Parahoplites wintoni
 * †Paraisurus
 * †Paraisurus compressus
 * †Paramicrodon – type locality for genus
 * †Paramicrodon estesi – type locality for species
 * †Parandiceras
 * †Parandiceras indicum – or unidentified comparable form
 * †Paranecrocarcinus
 * †Paranecrocarcinus moseleyi
 * †Paranecrocarinus
 * †Paranecrocarinus ovalis
 * †Paranomia
 * †Paranomia scabra
 * Parapuzosia seppenradensis 3.jpg †[[Parapuzosia]]
 * †Parapuzosia americana – type locality for species
 * †Parapuzosia bosei – type locality for species
 * †Parapuzosia sealei – type locality for species
 * †Parasaniwa – or unidentified comparable form
 * †Parasaniwa wyomingensis
 * Parasmilia
 * †Parasmilia austinensis
 * †Parasmilia bullardi – type locality for species
 * †Parasmilia graysonensis – type locality for species
 * †Parasuchus
 * †Parasuchus bransoni
 * Paratypothorax andressorum.JPG †[[Paratypothorax]]
 * †Paraxiopsis
 * †Paraxiopsis erugatus
 * †Parengonoceras
 * †Parengonoceras roemeri
 * †Parmicorbula
 * †Parmicorbula corneliana
 * †Parmicorbula hillensis
 * †Parmicorbula numerosa
 * †Parmicorbula rupana
 * †Parmicorbula sinuosa
 * †Parmicorbula suffalciata
 * †Parmicorbula terramaria
 * †Parmicorbula vokesi
 * †Paronychodon
 * †Paronychodon lacustris – or unidentified comparable form
 * Parvamussium
 * †Parvamussium danei
 * †Parvivoluta – tentative report
 * Patellina
 * †Patellina subcretacea
 * Pawpawsaurus cropped.png †[[Pawpawsaurus]] – type locality for genus
 * †Pawpawsaurus campbelli – type locality for species
 * †Pecten
 * †Pecten bellula
 * †Pecten bellulus
 * †Pecten catherina
 * †Pecten georgetownensis
 * †Pecten moodyi
 * †Pecten subalpinus
 * †Pecten texanus
 * †Pecten venustus
 * †Pecten wrighti
 * †Pedinopsis
 * †Pedinopsis pondi
 * †Peilinia
 * †Peilinia quadriplicata
 * †Pekinosaurus – or unidentified related form
 * †Pekinosaurus olseni
 * †Peneteius
 * Periploma
 * †Periploma edwardsi
 * †Periplomya
 * †Periplomya sulcatina
 * Perna – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Perna texana
 * †Perrisonota
 * †Perrisonota littlei
 * †Perrisonota protexta
 * Petrophyllia
 * †Phacellocoenia – tentative report
 * †Phacellocoenia tolmachoffana – type locality for species
 * Phacoides
 * †Phacoides mattiformis
 * †Pharodina
 * †Pharodina ferrana
 * †Phelopteria
 * †Phelopteria dalli
 * †Phelopteria linguaeformis
 * †Phelopteria timberensis
 * Pholadidea
 * †Pholadidea ragsdalensis
 * Pholadomyidae - Pholadomya scutata.JPG [[Pholadomya]]
 * †Pholadomya coahuilensis
 * †Pholadomya goldenensis
 * †Pholadomya ingens
 * †Pholadomya littlei
 * †Pholadomya occidentalis
 * †Pholadomya shattucki
 * Pholas
 * †Pholas scaphoides
 * †Phyllobrissus
 * †Phyllobrissus cubensis
 * Phymosoma.jpg †[[Phymosoma]]
 * †Phymosoma hilli
 * †Phytosaurus
 * †Piestochilus
 * †Piestochilus curviliratus
 * †Piestochilus levis
 * †Pinella
 * †Pinella reticulata
 * †Pinna
 * †Pinna laqueata
 * †Pirsila
 * †Pirsila decora
 * †Pirsila simpla
 * †Pirsila tensa
 * Pitar
 * †Pitar yoakumi
 * Placenticeras meeki.jpg †[[Placenticeras]]
 * †Placenticeras interealare
 * †Placenticeras meeki
 * †Placenticeras syrtale
 * Placopsilina
 * †Placopsilina minima
 * †Placotrochus
 * †Placotrochus texanus
 * Plagioecia
 * †Planocephalosaurus
 * †Planocephalosaurus lucasi – type locality for species
 * Planulina
 * †Planulina eaglefordensis
 * Platecarpus tympaniticus.jpg †[[Platecarpus]]
 * †Platecarpus planifrons
 * †Platecarpus somenensis – or unidentified comparable form
 * †Platecarpus tympaniticus
 * †Platiknemiceras
 * †Platiknemiceras flexuosum
 * †Platyceramus
 * †Platyceramus cycloides
 * †Platyceramus mantelli - or unidentified loosely related form
 * Platypterigius kiprjanov2.jpg †[[Platypterygius]]
 * †Plesiacanthoceras
 * †Plesiacanthoceras bellsanum
 * †Plesiosaurus
 * †Pleuriocardia
 * †Pleuriocardia eufaulense
 * †Pleuriocardia eufaulensis huntanum
 * †Pleurocora
 * †Pleurocora coalescens
 * †Pleuromya
 * †Pleuromya inconstans
 * †Pleurosmilia
 * †Pleurosmilia quaylei – type locality for species
 * †Pleurosmilia saxifisi – type locality for species
 * Pleurotomaria.jpg [[Pleurotomaria]]
 * †Pleurotomaria macilenta
 * †Plicatolamna – or unidentified comparable form
 * †Plicatolamna arcuata
 * †Plicatoscyllium – type locality for genus
 * †Plicatoscyllium antiquum – type locality for species
 * †Plicatoscyllium derameei – type locality for species
 * Plicatula
 * †Plicatula clarki
 * †Plicatula dentonensis
 * †Plicatula goldenana
 * †Plicatula incongrua
 * †Plicatula mullicaensis
 * †Plicatula tetrica
 * †Plioaxius
 * †Plioaxius texensis
 * PlioplatecarpusDB.jpg †[[Plioplatecarpus]] – tentative report
 * †Poecilocrinus
 * †Poecilocrinus dispandus
 * Polinices
 * †Polinices kummeli
 * †Polinices stephensoni
 * †Pollex
 * †Pollex angulatus
 * †Pollex obesus
 * †Polyacrodus
 * †Polyacrodus parvidens – or unidentified related form
 * †Polyptychodon
 * †Polyptychodon hudsoni – type locality for species
 * †Polytremacis
 * †Polytremacis hancockensis – type locality for species
 * †Polytremacis urgonensis
 * †Pontocyprella
 * †Pontocyprella alexanderi
 * †Poposaurus
 * †Poposaurus gracilis
 * †Poposaurus langstoni
 * †Porituberoolithus
 * †Postligata
 * Postosuchus kirkpatricki.jpg †[[Postosuchus]] – type locality for genus
 * †Postosuchus kirkpatricki – type locality for species
 * †Praeleda
 * †Praeleda compar
 * †Prionocyclites
 * †Prionocyclites mite
 * †Prionocyclus
 * †Prionocyclus albinus
 * †Prionocyclus hyatti
 * †Prionocyclus macombi
 * †Prionocyclus wyomingensis
 * †Priontropis
 * †Priontropis woolgari – or unidentified related form
 * †Priscomactra
 * †Priscomactra cymba
 * †Priscomactra munda
 * †Procardia
 * †Procardia torta
 * †Procheloniceras
 * †Procheloniceras albrechtiaustriae – or unidentified related form
 * Prognathodon3.jpg †[[Prognathodon]] – tentative report
 * †Promystriosuchus – type locality for genus
 * †Promystriosuchus ehleri – type locality for species
 * †Proraster
 * †Proraster dalli
 * †Proscincetes
 * †Proscincetes texanus
 * †Prosiren – type locality for genus
 * †Prosiren elinorae – type locality for species
 * †Protarca
 * †Protarca tramitensis
 * †Protecovasaurus – type locality for genus
 * †Protecovasaurus lucasi – type locality for species
 * †Protexanites
 * †Protexanites planatus
 * †Protoavis – type locality for genus
 * †Protoavis texensis – type locality for species
 * †Protocallianassa
 * †Protocallianassa pleuralum – type locality for species
 * †Protocardia
 * †Protocardia guadalupense
 * †Protocardia hillana
 * †Protocardia marcosensis
 * †Protocardia spillmani
 * †Protocardia texana
 * †Protocardia timberensis
 * †Protocardia torta
 * †Protocardia wadei
 * †Protodonax
 * †Protodonax lingulatus
 * †Protodonax lingulatus tensus
 * †Protodonax robustus
 * †Protohadros – type locality for genus
 * †Protohadros byrdi – type locality for species
 * †Protoplatyrhina
 * †Protoplatyrhina renae
 * Protosphyraena2DB.jpg †[[Protosphyraena]]
 * †Proxestops
 * †Pseudananchys
 * †Pseudananchys stephensoni – type locality for species
 * †Pseudaspidoceras
 * †Pseudaspidoceras flexuosum
 * †Pseudocalycoceras
 * †Pseudocalycoceras angolaense
 * †Pseudoclavulina
 * †Pseudoclavulina clavata
 * †Pseudocoeniopsis – tentative report
 * †Pseudocoeniopsis wintoni – type locality for species
 * Pseudocorax affinis.jpg †[[Pseudocorax]]
 * †Pseudocorax granti
 * †Pseudogaudryinella
 * †Pseudogaudryinella capitosa
 * †Pseudohypolophus
 * †Pseudolimea
 * †Pseudolimea kimbroensis
 * †Pseudolimea reticulata
 * †Pseudolimea sellardsi
 * Pseudomalaxis
 * †Pseudomalaxis patens
 * †Pseudomalaxis pateriformis
 * Pseudomelania shell cropped.png †[[Pseudomelania]]
 * †Pseudomelania basicostata
 * †Pseudomelania ferrata
 * †Pseudomelania roanokana
 * †Pseudoncrocarcinus
 * †Pseudoncrocarcinus scotti
 * †Pseudoperna
 * †Pseudoperna congesta
 * †Pseudopetalodontia
 * †Pseudopetalodontia felixi
 * †Pseudoptera
 * †Pseudoptera hornensis
 * †Pseudoptera hornesis
 * †Pseudoptera rushana
 * †Pseudoptera serrata
 * †Pseudoptera viana
 * †Psilomya
 * †Psilomya concentrica
 * †Psilomya levis
 * Pteranodon longiceps mmartyniuk wiki.png †[[Pteranodon]] – or unidentified comparable form
 * †Pteria
 * †Pteria linguaeformis – tentative report
 * †Pteria rhombica
 * †Pterocerella
 * †Pterocerella densatus
 * †Pterocerella densatus nacatochanus
 * †Pterocerella poinsettiformis
 * †Pterocerella robustus
 * †Pterot
 * †Pterot castrovillensis – or unidentified related form
 * Megatrigoniidae - Pterotrigonia caudata.JPG †[[Pterotrigonia]]
 * †Pterotrigonia castrovillensis
 * †Pterotrigonia eufalensis
 * †Pterotrigonia eufaulensis
 * †Pterotrigonia eufaulensis gabbi
 * †Pterotrigonia marionensis
 * †Pterotrigonia stantoni
 * †Ptychomya
 * †Ptychomya stantonii
 * †Ptychotrygon
 * †Ptychotrygon vermiculata
 * †Ptychotrygon winni – type locality for species
 * †Pugnellus
 * †Pugnellus densatus
 * †Pugnellus goldmani
 * Desmoceratidae - Puzosia compressa cropped.jpg †[[Puzosia]]
 * †Puzosia crebrisulcata – or unidentified comparable form
 * Pycnodonte
 * †Pycnodonte belli
 * †Pycnodonte mutabilis
 * †Pycnodonte vesicularis
 * †Pycnomicrodon
 * †Pycnomicrodon texanus
 * †Pyrgulifera
 * †Pyrgulifera costata
 * †Pyrgulifera costata sublevis
 * †Pyrgulifera costata tuberata
 * †Pyrgulifera ornata
 * †Pyrifusus
 * †Pyrina
 * †Pyrina parryi
 * †Pyropsis
 * †Pyropsis lanhami
 * †Pyropsis proxima – or unidentified related form

Q

 * †Quayia – or unidentified comparable form
 * †Quayia zideki
 * Gfp-quetzalcaotlus.jpg †[[Quetzalcoatlus]] – type locality for genus
 * †Quetzalcoatlus northropi – type locality for species
 * †Quitmaniceras
 * †Quitmaniceras reaseri
 * †Quitmanites
 * †Quitmanites ceratitosus
 * †Quitmanites evolutus

R

 * †Rachiosoma
 * †Rachiosoma hondoensis – type locality for species
 * †Radiopecten
 * †Radiopecten mississippiensis
 * Raja
 * †Raja farishi – type locality for species
 * †Ramsetia
 * †Ramsetia whitfieldi
 * †Raninella
 * †Remera
 * †Remera decora
 * †Remera juncea
 * †Remera microstriata
 * †Remnita
 * †Remnita anomalocostata
 * †Remnita biacuminata
 * †Remondia
 * †Remondia robbinsi
 * Reophax
 * †Reophax deckeri
 * †Reptomulticava
 * †Restes
 * †Rewaconodon – or unidentified related form
 * †Rewaconodon tikiensis
 * †Rhamphidoceras – type locality for genus
 * †Rhamphidoceras saxatilis – type locality for species
 * Rhinobatos
 * †Rhinobatos craddocki – type locality for species
 * †Rhinobatos uvulatus – type locality for species
 * Rhombodus NT small cropped.png †[[Rhombodus]]
 * †Rhombodus binkhorsti
 * †Rhytidohoplites
 * †Rhytidohoplites robertsi
 * †Rhytophorus – tentative report
 * †Richardoestesia
 * †Richardoestesia gilmorei
 * †Richardoestesia isosceles – type locality for species
 * †Rileymillerus – type locality for genus
 * †Rileymillerus cosgriffi – type locality for species
 * Ringicula doliaris.png [[Ringicula]]
 * †Ringicula anfractoline
 * †Ringicula arlingtonensis
 * †Ringicula culbertsoni
 * †Ringicula pulchella
 * †Ringicula sufflata
 * Rogerella
 * †Rogerella cragini – type locality for species
 * †Romaniceras
 * †Romaniceras aguilerai
 * †Romaniceras zacatecana
 * Rostellaria – tentative report
 * †Rostellaria robertsi
 * †Russellosaurus – type locality for genus
 * †Russellosaurus coheni – type locality for species
 * Rutiodon BW.jpg †[[Rutiodon]]

S

 * Salenia
 * †Salenia hondoensis – type locality for species
 * †Sanmiguelia
 * †Sanoarca
 * †Sanoarca faucana
 * †Sanoarca grandis
 * †Sargana
 * †Sargana stantoni
 * Sauroposeidon Scale Diagram Steveoc86.svg †[[Sauroposeidon]]
 * †Sauroposeidon proteles
 * †Saurornitholestes
 * †Saurornitholestes langstoni – or unidentified comparable form
 * †Sauvagesia – tentative report
 * †Sauvagesia hilli
 * †Saynella
 * †Saynella hilli
 * Scalpellum – tentative report
 * †Scambula
 * †Scambula perplana
 * Scapanorhynchus raphiodon cropped.jpg †[[Scapanorhynchus]]
 * †Scapanorhynchus texanus
 * †Scapanorhynchus textanus
 * †Scapherpeton
 * †Scaphites
 * †Scaphites bosquensis – type locality for species
 * †Scaphites brittonensis
 * †Scaphites hippocrepis - or unidentified loosely related form
 * †Scaphites rugosus
 * †Scaphites warreni
 * †Scaphites yorkensis
 * †Schizobasis
 * Scintilla – tentative report
 * †Scintilla ramoni
 * †Sciponoceras
 * †Sciponoceras gracile
 * Sclerorhynchus.jpg †[[Sclerorhynchus]]
 * †Sclerorhynchus pettersi – type locality for species
 * †Scolomastax – type locality for genus
 * †Scolomastax sahlsteini – type locality for species
 * Scyliorhinus
 * †Scyliorhinus ivagrantae – type locality for species
 * †Selaginella – or unidentified comparable form
 * †Seminodicrescis
 * †Seminola – tentative report
 * †Semiometra
 * †Semiometra minuta
 * †Semionotus – or unidentified comparable form
 * †Senis
 * †Senis elongata
 * †Senis elongatus
 * Serpula
 * †Serpula cretacea
 * †Serpula implicata
 * †Serpula lineata
 * †Serratolamna
 * †Serratolamna serrata
 * †Sexta
 * †Sexta ethelana
 * †Sexta navicula
 * †Sharpeiceras
 * †Sharpeiceras schlueteri
 * †Sharpeiceras tlahualiloense
 * †Shuparoceras
 * Shuvosaurus BW.jpg †[[Shuvosaurus]] – type locality for genus
 * †Shuvosaurus inexpectatus – type locality for species
 * †Siderastrea
 * †Siderastrea tuckerae – type locality for species
 * †Siderofungia
 * †Siderofungia irregularis
 * †Sierritasuchus – type locality for genus
 * †Sierritasuchus macalpini – type locality for species
 * †Sinonia
 * †Sinonia levis
 * †Siphodictyum
 * Siphotextularia
 * †Siphotextularia washitaensis
 * Skolithos.jpg †[[Skolithos]]
 * Smilotrochus
 * †Smilotrochus palmerae – type locality for species
 * †Solanocrinites
 * †Solanocrinites wertheimi
 * Solemya
 * †Solemya bilix – tentative report
 * †Solenoceras
 * †Solenoceras multicostatum
 * †Solenoceras reesidei
 * †Solenoceras texanum
 * †Solyma
 * †Solyma bilix
 * †Solyma elliptica
 * †Solyma gardnerae
 * †Solyma parva
 * †Solyma stewarti
 * †Spalacotheroides – type locality for genus
 * †Spalacotheroides bridwelli – type locality for species
 * †Spathites
 * †Spathites coahuilaensis
 * †Spathites rioensis
 * †Specus
 * †Specus fimbriatus
 * Sphenodiscus - opalized.jpg shell of the Late Cretaceous ammonoid cephalopod Sphenodiscus]] †Sphenodiscus
 * †Sphenodiscus intermedius
 * †Sphenodiscus lobatus
 * †Sphenodiscus pleurisepta
 * †Sphenodiscus tirensis
 * †Spinosuchus – type locality for genus
 * †Spinosuchus caseanus – type locality for species
 * †Spironema
 * †Spironema perryi
 * Spiroplectammina
 * †Spiroplectammina ammovitrea
 * †Spiroplectammina goodlandana
 * Spondylus
 * †Spondylus hilli
 * †Spondylus munitus
 * †Spondylus siccus – type locality for species
 * Squalicorax pristodontus Agassiz, 1843 1.jpg [[Squalicorax]]
 * †Squalicorax kaupi
 * †Squalicorax pristodontus
 * Squalus
 * †Squalus huntensis – type locality for species
 * †Squatigaleus
 * †Squatigaleus sulphurensis – type locality for species
 * †Squatirhina
 * †Squatirhina americana
 * †Stamenocella
 * †Stantonella
 * †Stantonella interrupta
 * †Stearnsia
 * †Stearnsia robbinsi
 * †Stelidioseris
 * †Stelidioseris bellensis – type locality for species
 * †Stelidioseris pattoni – type locality for species
 * †Stelidioseris whitneyi – type locality for species
 * †Stellatopollis
 * †Steorrosia
 * †Steorrosia aspera
 * Stephanocoenia – tentative report
 * †Stephanomorpha – tentative report
 * †Stephanomorpha saxirotundi – type locality for species
 * †Stoliczkaia
 * †Stoliczkaia argonautiformis
 * †Stoliczkaia conlini – type locality for species
 * †Stoliczkaia crotaloides
 * †Stoliczkaia scotti
 * †Stoliczkaia texana – type locality for species
 * Stomatopora
 * †Stomohamites – tentative report
 * Striarca
 * †Striarca cuneata
 * †Striarca plummeri
 * †Striarca saffordi
 * †Striarca webbervillensis
 * †Striaticostatum
 * †Striaticostatum bexarense
 * †Striaticostatum pondi
 * †Striaticostatum sparsum
 * Struthiomimus BW.jpg †[[Struthiomimus]] – or unidentified comparable form
 * †Suarodon
 * †Sumitomoceras
 * †Sumitomoceras bentonianum
 * †Syncyclonema
 * †Syncyclonema archeri
 * †Syncyclonema kingi
 * †Syncyclonema simplicius
 * †Syncyclonema travisanus
 * †Synorichthys – tentative report
 * †Synorichthys stewarti

T

 * †Tancredia – tentative report
 * †Tanyosphaeridium
 * †Tanyosphaeridium salpinx
 * †Tarrantites
 * †Tarrantites adkinsi
 * †Tarrantoceras
 * †Tarrantoceras cuspidum
 * †Tarrantoceras sellardsi
 * †Tarsomordeo – type locality for genus
 * †Tarsomordeo winkleri – type locality for species
 * †Technosaurus – type locality for genus
 * †Technosaurus smalli – type locality for species
 * †Tecovasaurus – type locality for genus
 * †Tecovasaurus murryi – type locality for species
 * †Tecovasuchus – type locality for genus
 * †Tecovasuchus chatterjeei – type locality for species
 * Teinostoma
 * Tellina fabula.jpg [[Tellina]]
 * †Tellina duganensis
 * †Tellina dugansensis
 * †Tellina munda
 * †Tellina parkerana
 * †Tellina patula
 * †Tellina rivana
 * †Tellina stabulana
 * †Tellinimera
 * †Tellinimera buboana
 * †Tellinimera gabbi
 * †Tellinimera munda
 * †Tenea
 * †Tenea parilis
 * †Tenea patula
 * Tenontosaurus BW.jpg †[[Tenontosaurus]]
 * †Tenontosaurus dossi – type locality for species
 * †Tentontosaurus
 * †Tenuipteria
 * †Tenuipteria argentea
 * †Tenuipteria argenteus
 * Terebratulina
 * †Terebratulina filosa
 * †Terebratulina noackensis
 * †Terebrimya
 * †Terebrimya lamarana
 * Teredolites
 * †Terlinguachelys – type locality for genus
 * †Terlinguachelys fischbecki – type locality for species
 * Teleorhinus robustus.JPG †[[Terminonaris]]
 * †Terminonaris robusta – or unidentified comparable form
 * †Tetragonites
 * †Tetragonites brazoensis – type locality for species
 * †Texabatis – type locality for genus
 * †Texabatis corrugata – type locality for species
 * †Texacephale – type locality for genus
 * †Texacephale langstoni – type locality for species
 * †Texagryphea
 * †Texanites
 * †Texanites dentatocarinatum
 * †Texanites gallicus
 * †Texanites vanhoepeni
 * †Texasetes – type locality for genus
 * †Texasetes pleurohalio – type locality for species
 * †Texasia
 * †Texasia dartoni
 * †Texicaprina
 * †Texicaprina vivari
 * †Texigryphaea
 * †Texigryphaea sashitaensis
 * †Texigryphea
 * †Texigryphea washitaensis
 * Textularia.jpg [[Textularia]]
 * †Textularia losangica
 * †Textularia rioensis
 * †Thamnasteria
 * †Thamnasteria hoffmeisteri – type locality for species
 * †Thamnoseris – tentative report
 * †Thamnoseris morchella – type locality for species
 * †Thecosmilia – tentative report
 * †Thomasites
 * †Thomasites adkinsi
 * †Thomelites
 * †Thryptodus
 * †Thryptodus loomisi – type locality for species
 * †Thylacus
 * †Thylacus cretaceus
 * †Thyracella
 * †Tiarasmilia – type locality for genus
 * †Tiarasmilia casteri – type locality for species
 * †Tibiaporrhais – tentative report
 * †Tibiaporrhais cooperensis
 * †Tintorium
 * †Tintorium pogodaformis – or unidentified comparable form
 * †Titanosarcolites
 * †Titanosarcolites oddsensis
 * †Tornatellaea
 * †Tornatellaea cretacea
 * †Tornatellaea eretacea
 * †Tornatellaea eretacea appressa
 * †Tornatellaea gramdis
 * †Tornatellaea scatesi
 * Milwaukee Public Museum November 2022 029 (Third Planet--Torosaur).jpg †[[Torosaurus]]
 * †Torosaurus utahensis – or unidentified comparable form
 * †Toucasia
 * †Toucasia hancockensis
 * †Toucasia texana
 * †Tovula
 * †Tovula microlirae
 * †Trachybaculites
 * †Trachybaculites columna
 * Trachycardium
 * †Trachycardium eufaulensis
 * †Trachycardium tinninense
 * †Trachyscaphites
 * †Trachyscaphites densicostatus – type locality for species
 * †Trachyscaphites porchi
 * †Trachyscaphites spiniger
 * †Trigonarca – tentative report
 * †Trigonia
 * †Trigonia clavigera
 * †Trigonia emoryi
 * †Trigonia goodellii
 * †Trigonia munita
 * †Trigonia proscabra
 * †Trigonia stantoni
 * †Trigonia vyschetzkii
 * †Trilophosaurus – type locality for genus
 * †Trilophosaurus buettneri – type locality for species
 * †Trilophosaurus jacobsi
 * Trinacromerum BW.jpg †[[Trinacromerum]] – type locality for genus
 * †Trinacromerum bentonianum – type locality for species
 * †Trinitichelys – type locality for genus
 * †Trinitichelys hiatti – type locality for species
 * †Triodus
 * †Triodus moorei
 * †Triopticus – type locality for genus
 * †Triopticus primus – type locality for species
 * †Tristix
 * †Tristix gigantea
 * †Tristix quadrata
 * Trochactaeon conicus 01.jpg †[[Trochactaeon]]
 * †Trochactaeon cumminsi
 * Trochocyathus
 * †Trochocyathus gardnerae – type locality for species
 * †Trochocyathus scottianus – type locality for species
 * †Trochocyathus sellardsi – type locality for species
 * †Trochocyathus taylorensis – type locality for species
 * †Trochocyathus wintoni – type locality for species
 * †Trochocyathus woolmani
 * †Trochoseris
 * †Trochoseris shattucki – type locality for species
 * †Trochosmilia
 * †Trochosmilia stainbrooki – type locality for species
 * †Troostella
 * †Troostella brevispira
 * †Troostella sublinearis
 * Tryonia
 * †Tryonia valida
 * †Tundora
 * †Tundora tuberculata
 * Turboella
 * †Turboella crebricostata
 * †Turboella tallahatchiensis
 * †Turgidodon
 * †Turgidodon lillegraveni – or unidentified comparable form
 * †Turrilites
 * †Turrilites acutus
 * †Turrilites saudersorum
 * Turritellatricarinata.jpg [[Turritella]]
 * †Turritella anstini
 * †Turritella bilira
 * †Turritella delriensis
 * †Turritella forgemoli – or unidentified comparable form
 * †Turritella hilgardi
 * †Turritella houstonia
 * †Turritella macnairyensis
 * †Turritella marnochi
 * †Turritella paravertebroides
 * †Turritella quadrilira
 * †Turritella seriatimgranulata
 * †Turritella shuleri
 * †Turritella trilira
 * †Turritella vertebroides
 * †Turritella vertebroides jonesi
 * †Turritella winchelli
 * †Turseodus – tentative report
 * †Tylosaurus
 * †Tylosaurus kansasensis
 * †Tylosaurus nepaeolicus
 * †Tylosaurus proriger – or unidentified comparable form
 * †Typothorax
 * Tyrannosaurus Rex Holotype.jpg †[[Tyrannosaurus]]
 * †Tyrannosaurus rex

U

 * †Uddenia
 * †Uktenadactylus
 * †Uktenadactylus wadleighi – type locality for species
 * †Unicardium
 * †Unicardium concentricum
 * Unio
 * Upogebia deltaura cropped.jpg †[[Upogebia]]
 * †Upogebia rhacheochir
 * †Urceolabrum
 * †Urceolabrum mantachieensis – tentative report
 * †Urceolabrum tuberculatum
 * †Ursirivus
 * †Ursirivus arlingtonanus
 * †Ursirivus fannensis
 * †Ursirivus fanninensis

V

 * Vaginulina
 * Valvulineria
 * †Valvulineria asterigerinoides
 * Vancleavea.jpg †[[Vancleavea]]
 * †Vancleavea campi
 * †Vascellum
 * †Vascellum elegans
 * †Vascellum fortispirae
 * †Vascellum leve
 * †Vascellum magnum
 * †Vascellum minusculum
 * †Vascellum mundum
 * †Vascellum mundum subteres
 * †Vascellum pingue
 * †Vascellum procerum
 * †Vascellum rivanum
 * †Vascellum robustum
 * †Vascellum subleve
 * †Vascellum tensum
 * †Vascellum vascellum
 * †Vascellum vascellum pressulum
 * †Vascellum vascellum subornatum
 * †Vascellum vianum
 * Vascoceratidae - Vascoceras cauvini.JPG †[[Vascoceras]]
 * †Vascoceras cauvini – or unidentified comparable form
 * †Vascoceras proprium
 * †Vascoceras silvanense
 * Venericardia
 * †Venericardia uvaldana
 * †Veniella
 * †Veniella conradi
 * †Veniella lineata
 * †Vetericardiella
 * †Vetericardiella crenalirata
 * †Vetericardiella webbervillensis
 * †Vicarya
 * †Vinella
 * Viviparus contectus met operculum2.JPG [[Viviparus]] – tentative report
 * Volsella
 * †Volsella alveolana
 * †Volsella modesta
 * †Volsella tarrantana
 * †Volsella uddeni
 * †Volutomorpha
 * †Volutomorpha aspera
 * †Volutomorpha conradi
 * †Volutomorpha graysonensis
 * †Volutomorpha retifera
 * †Voysa
 * †Voysa compacta
 * †Voysa constricta
 * †Voysa eulessana
 * †Voysa lepida
 * †Voysa minor
 * †Voysa planolata
 * †Voysa savoiana
 * †Voysa speciosa
 * †Voysa varia
 * †Voysa varia extensa
 * †Voysa varia levicostae
 * †Voysa varia nodosa
 * Vulsella
 * †Vulsella alveolana
 * †Vulsella tarrantana

W

 * †Wadeopsammia
 * †Wadeopsammia nodosa
 * Wkirpachi1.JPG †[[Wannchampsus]] – type locality for genus
 * †Wannchampsus kirpachi – type locality for species
 * †Wannia
 * †Wannia scurriensis – type locality for species
 * †Washitaster
 * †Washitaster longisulcus
 * †Weeksia
 * †Weeksia lubbocki
 * †Woodbinax
 * †Woodbinax texanus
 * †Woodbinesuchus – type locality for genus
 * †Woodbinesuchus byersmauricei – type locality for species
 * †Worthoceras
 * †Worthoceras gibbosum
 * †Worthoceras vermiculum – or unidentified comparable form
 * †Wrightoceras
 * †Wrightoceras munieri

X

 * Xanthosia
 * †Xanthosia pawpawensis
 * †Xanthosia reidi
 * †Xanthosia wintoni
 * †Xenacanthus – report made of unidentified related form or using admittedly obsolete nomenclature
 * Xenophora
 * XiphactinusDB cropped.png †[[Xiphactinus]]
 * †Xylophagella
 * †Xylophagella whitneyi

Y

 * †Yezoites
 * †Yezoites subevolutus
 * Yoldia
 * †Yoldia septariana
 * †Yoldia subacuta