This list of the prehistoric life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas.

Precambrian

The Paleobiology Database records no known occurrences of Precambrian fossils in Texas

Paleozoic

Selected Paleozoic taxa of Texas

• 

  †Acheloma – type locality for genus
  • †Acheloma cumminsi – type locality for species
• †Achistrum
  • †Achistrum ludwigi – type locality for species
• †Acrodus – tentative report
  • †Acrodus olsoni – type locality for species
  • †Acrodus sweetlacruzensis – type locality for species
• †Actinoconchus
• †Acutichiton
• †Adamantina
• †Adrianites – tentative report
• †Agathiceras
  • †Agathiceras applini – type locality for species
• †Alegeinosaurus
• †Alethopteris
• †Almites
• †Altudoceras
• †Alveus – type locality for genus
• †Amphiscapha
• †Amplexus – report made of unidentified related form or using admittedly obsolete nomenclature

• 

  Amusium – tentative report
• †Ananias
• †Anatsabites
• †Angelosaurus – type locality for genus
  • †Angelosaurus dolani – type locality for species
• †Anisodexis
• †Annularia
  • †Annularia stellata – or unidentified comparable form
• †Anomalesia
• †Anomphalus
• †Aphetoceras
• †Aphlebia
• †Apsisaurus – type locality for genus
  • †Apsisaurus witteri – type locality for species

• 

  †Araeoscelis – type locality for genus
• †Archaeocidaris
• Archaeolithophyllum
• †Archeria – type locality for genus
  • †Archeria crassidisca – type locality for species
• †Archimedes
• †Arcuolimbus
• †Aristoceras
• †Armenoceras
• †Artisia
• †Aspidosaurus – type locality for genus
• †Athyris
• †Aulopora – report made of unidentified related form or using admittedly obsolete nomenclature

• 

  †Aviculopecten
  • †Aviculopecten ballingerana
  • †Aviculopecten girtyi – type locality for species
  • †Aviculopecten gryphus – type locality for species
  • †Aviculopecten occidentalis
  • †Aviculopecten sumnerensis
• †Avonia
• †Barnesoceras – type locality for genus
• †Bathyglyptus – type locality for genus
• †Bellerophon – tentative report
• †Bellerophon
  • †Bellerophon graphicus
• †Bembexia
• †Bitaunioceras
• †Blountiella

• 

  †Bolosaurus – type locality for genus
  • †Bolosaurus major – type locality for species
  • †Bolosaurus striatus – type locality for species
• †Brachydectes
• †Brachyphyllum – tentative report
• †Branneroceras
• †Broiliellus – type locality for genus
  • †Broiliellus brevis – type locality for species
  • †Broiliellus olsoni – type locality for species
  • †Broiliellus texensis – type locality for species
• †Burenoceras

• 

  †Cacops
  • †Cacops aspidephorus – type locality for species
• †Calamites
  • †Calamites undulatus
• †Callipteridium
• †Callipteris
  • †Callipteris conferta
• †Calophyllum – tentative report
• †Camarotoechia
• †Captorhinus – type locality for genus
  • †Captorhinus aguti – type locality for species
• †Carbonicola
• †Cardiocephalus – type locality for genus
  • †Cardiocephalus sternbergi – type locality for species
• †Carrolla – type locality for genus

• 

  †Casea – type locality for genus
  • †Casea broilii – type locality for species
• †Caseoides – type locality for genus
• †Caseopsis
• †Cassiavellia – type locality for genus
  • †Cassiavellia galtarae – type locality for species
• †Catenipora
• †Cedaria
• †Chancelloria – tentative report
• †Chonetes
  • †Chonetes flemingi – tentative report
  • †Chonetes verneuilianus
• †Cibolites – type locality for genus
• †Clarkoceras

• 

  †Cleiothyridina
  • †Cleiothyridina mulsa
  • †Cleiothyridina nana
  • †Cleiothyridina pilularis
  • †Cleiothyridina rara
  • †Cleiothyridina rectimarginata – type locality for species
• †Climacograptus
• †Clitendoceras
• †Clonograptus
• †Coenocystis – type locality for genus
• †Collemataria – type locality for genus

• 

  †Composita
  • †Composita affinis
  • †Composita apheles – type locality for species
  • †Composita apsidata
  • †Composita bucculenta – type locality for species
  • †Composita costata
  • †Composita cracens
  • †Composita crassa – type locality for species
  • †Composita discina
  • †Composita emarginata
  • †Composita enormis – type locality for species
  • †Composita imbricata – type locality for species
  • †Composita mexicana
  • †Composita mira
  • †Composita nucella
  • †Composita ovata
  • †Composita parasulcata – type locality for species
  • †Composita pilula
  • †Composita prospera
  • †Composita pyriformis
  • †Composita quantilla
  • †Composita stalagmium
  • †Composita strongyle – type locality for species
  • †Composita subcircularis
  • †Composita subtilita
• †Conjunctio
• †Conocardium – tentative report
• †Cooperoceras – type locality for genus
• †Coosella
• †Coosia
• †Cordaites
  • †Cordaites principalis
• †Cotteroceras

• 

  †Cotylorhynchus
  • †Cotylorhynchus hancocki – type locality for species
• Crania
• †Cravenoceras – tentative report
• †Cricotus
• †Crossotelos
• †Ctenacanthus
  • †Ctenacanthus amblyxiphias – type locality for species
• †Ctenospondylus – type locality for genus
• †Cylicioscapha
• †Cypricardinia – tentative report
• †Cyptendoceras
• †Cystothalamia – type locality for genus
  • †Cystothalamia megacysta
  • †Cystothalamia nodulifera
• †Dadoxylon
• †Dakeoceras – tentative report
• †Dasyceps
• †Deiracephalus
• Dentalium
• †Diadectes – type locality for genus
• †Dimacrodon – type locality for genus

• 

  †Dimetrodon – type locality for genus
  • †Dimetrodon booneorum – type locality for species
  • †Dimetrodon dollovianus – type locality for species
  • †Dimetrodon gigashomogenes – type locality for species
  • †Dimetrodon grandis – type locality for species
  • †Dimetrodon kempae – type locality for species
  • †Dimetrodon limbatus – type locality for species
  • †Dimetrodon loomisi – type locality for species
  • †Dimetrodon macrospondylus – type locality for species
  • †Dimetrodon milleri – type locality for species
  • †Dimetrodon natalis – type locality for species
• †Diplocaulus – type locality for genus
  • †Diplocaulus magnicornis – type locality for species
• †Diraphora
• †Dissorophus – type locality for genus
  • †Dissorophus multicinctus – type locality for species
• †Domatoceras
• †Driveria – type locality for genus
• †Echinaria
• †Ectenolites

• 

  †Edaphosaurus – type locality for genus
  • †Edaphosaurus boanerges
  • †Edaphosaurus cruciger – or unidentified related form
  • †Edaphosaurus pogonias – type locality for species
• †Edestus
• †Edmondia
• †Edops
  • †Edops craigi
• †Ellesmeroceras
• †Empedias
• †Endoceras
• †Endolobus
• Eocaudina
• †Eosyodon – type locality for genus
• †Eothyris – type locality for genus
  • †Eothyris parkeyi – type locality for species
• †Eowellerites
• †Epiphyton
• †error
• †Error

• 

  †Eryops – type locality for genus
  • †Eryops megacephalus – type locality for species
• †Estheria
• †Euomphalus
• †Euryodus – type locality for genus
  • †Euryodus primus – type locality for species
• †Exovasa – type locality for genus
  • †Exovasa cystauletoides – type locality for species
• †Fenestella
• †Fusulina – report made of unidentified related form or using admittedly obsolete nomenclature
• †Gastrioceras
• †Geinitzina
• †Genevievella
• †Geragnostus

• 

  †Gerobatrachus – type locality for genus
  • †Gerobatrachus hottoni – type locality for species
• †Gervillia – report made of unidentified related form or using admittedly obsolete nomenclature
• †Girvanella
• †Glaucosaurus – type locality for genus
  • †Glaucosaurus megalops – type locality for species
• †Glikmanius
  • †Glikmanius occidentalis
• †Gnathorhiza
• †Goniatites
• †Gorgodon – type locality for genus
  • †Gorgodon minutus – type locality for species
• †Grewingkia
• †Guadalupia
  • †Guadalupia auricula – type locality for species
  • †Guadalupia cupulosa – type locality for species
  • †Guadalupia microcamera – type locality for species
  • †Guadalupia ramescens – type locality for species
  • †Guadalupia vasa – type locality for species
• †Gypospirifer – type locality for genus
  • †Gypospirifer condor
• †Helicoconchus – type locality for genus

• 

  †Helicoprion
  • †Helicoprion davisii
• †Helminthochiton
• †Hercosestria
• †Hoffmannia – report made of unidentified related form or using admittedly obsolete nomenclature
• †Homagnostus
• †Hybodus
• †Hypseloconus
• †Icriodus
• †Incisimura – type locality for genus
  • †Incisimura bella – type locality for species

• 

  †Isodectes
• †Isogramma
• †Janassa
• †Jeffersonia
• †Jinogondolella
• †Kingstonia
• †Knoxosaurus – type locality for genus
• †Kockelella
• †Komia
• †Labidosaurikos
• †Labidosaurus
• †Lambeoceras
• †Lepidophyllum
• †Levisoceras
• †Limbella
• Lingula
• †Liroceras
• †Llanoaspis

• 

  †Lysorophus
• †Martinia
• †Mastersonia – type locality for genus
• †Mcqueenoceras
• †Metacoceras
• †Metalegoceras
• †Meteoraspis
• †Metoptoma
• †Michelinoceras – tentative report
• †Micraroter – tentative report
  • †Micraroter erythrogeios
• †Microbaltoceras – type locality for genus
• †Minilya
• †Murchisonia

• 

  †Mycterosaurus – type locality for genus
  • †Mycterosaurus longiceps – type locality for species
• †Nanobamus – type locality for genus
• †Naticopsis
  • †Naticopsis judithae
  • †Naticopsis remex
  • †Naticopsis transversa – type locality for species
• †Neldasaurus
• †Neoaganides
• †Neocalamites – or unidentified comparable form

• 

  †Neospirifer
  • †Neospirifer amphigyus – type locality for species
  • †Neospirifer apothescelus – type locality for species
  • †Neospirifer bakeri – type locality for species
  • †Neospirifer cameratus – tentative report
  • †Neospirifer formulosus
  • †Neospirifer huecoensis – type locality for species
  • †Neospirifer kansasensis
  • †Neospirifer mansuetus
  • †Neospirifer neali
  • †Neospirifer notialis
  • †Neospirifer placidus
  • †Neospirifer triplicatus
  • †Neospirifer venezuelensis
• †Neuropteris
  • †Neuropteris cordata – tentative report
• †Nielsenoceras
• †Norwoodia
• Nucula – report made of unidentified related form or using admittedly obsolete nomenclature
• †Nybyoceras
• †Olenus

• 

  †Ophiacodon – type locality for genus
  • †Ophiacodon major – type locality for species
  • †Ophiacodon retroversus – type locality for species
  • †Ophiacodon uniformis – type locality for species
• †Ormoceras
• †Orodus
• †Orthacanthus
• †Ostodolepis – type locality for genus
• †Oulodus
• †Ozarkodina
• †Pachylyroceras
• †Paladin
• †Palaeoniscus – tentative report

• 

  †Pantylus – type locality for genus
  • †Pantylus cordatus – type locality for species
• †Paraceltites
• †Parafusulina
• †Paralegoceras
• †Paraschwagerina
• †Pariotichus – type locality for genus
• †Parioxys – type locality for genus
• Patella – tentative report

• 

  †Pecopteris
  • †Pecopteris arborescens
  • †Pecopteris hemitelioides
  • †Pecopteris unita
• †Pedanochiton – type locality for genus
• †Pelodosotis – type locality for genus
  • †Pelodosotis elongatum – type locality for species
• †Peripetoceras
• †Petalodus
• †Phlegethontia – tentative report
• †Phonerpeton
  • †Phonerpeton pricei – type locality for species
• †Pinnularia
• †Plaesiomys
• †Plagiostoma – report made of unidentified related form or using admittedly obsolete nomenclature
• †Platyceras

• 

  †Platyhystrix – or unidentified comparable form
• †Plectronoceras
• †Pleuronautilus
• Pleurotomaria – report made of unidentified related form or using admittedly obsolete nomenclature
• †Plicochonetes
• †Posidonia
• Priscopedatus
• †Prodentalium
• †Prostacheoceras
  • †Prostacheoceras skinneri – type locality for species
• †Protocaptorhinus – type locality for genus
  • †Protocaptorhinus pricei – type locality for species
• †Protorothyris – type locality for genus
  • †Protorothyris archeri – type locality for species

• 

  †Psaronius
• †Pseudomelania – report made of unidentified related form or using admittedly obsolete nomenclature
• Pteria – report made of unidentified related form or using admittedly obsolete nomenclature
• †Pterochiton
• †Pugnax
• †Quadratia
• †Quasicaecilia – type locality for genus
• †Rananasus
• †Rayonnoceras
• †Reiszorhinus – type locality for genus
• †Retaria – report made of unidentified related form or using admittedly obsolete nomenclature
• †Rhabdiferoceras
• †Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature
• †Ribeiria
• †Rioceras
• †Romeria – type locality for genus
  • †Romeria prima – type locality for species
  • †Romeria texana – type locality for species
• †Rota

• 

  †Rubeostratilia – type locality for genus
• †Rugaria
• †Ruthenoceras – report made of unidentified related form or using admittedly obsolete nomenclature
• †Sagenodus
• †Sallya
• †Samaropsis
• †Sauropleura
• †Scapanops – type locality for genus
  • †Scapanops neglecta – type locality for species
• †Schwagerina
• †Secodontosaurus
  • †Secodontosaurus obtusidens – type locality for species
• Serpula – tentative report

• 

  †Seymouria – type locality for genus
  • †Seymouria baylorensis – type locality for species
• †Shouchangoceras
• †Sigillaria
  • †Sigillaria brardii
• †Slaugenhopia – type locality for genus
• Solemya – tentative report
• †Solenochilus
• †Solenopora
• †Spermatodus

• 

  †Sphenacanthus
• †Sphenophyllum
  • †Sphenophyllum oblongifolium
• †Sphenopteris
• †Spica
• †Spirifer
  • †Spirifer rockymontanus
• Spirorbis
• †Stearoceras
• †Steppesaurus – type locality for genus
• †Stereophallodon – type locality for genus
  • †Stereophallodon ciscoensis – type locality for species

• 

  †Stethacanthus
• †Strepsodiscus
• †Strophomena
  • †Strophomena neglecta
• †Syringopora – tentative report
• †Tainoceras
• †Tappenosaurus – type locality for genus
  • †Tappenosaurus magnus – type locality for species
• †Tarphyceras
• †Terebratula – report made of unidentified related form or using admittedly obsolete nomenclature
• †Tersomius – type locality for genus
  • †Tersomius texensis – type locality for species
• †Tesnusocaris – type locality for genus
  • †Tesnusocaris goldichi – type locality for species

• 

  †Tetraceratops – type locality for genus
  • †Tetraceratops insignis – type locality for species
• †Tetrataxis
• †Texoceras
• †Trichasaurus – type locality for genus
  • †Trichasaurus texensis – type locality for species
• †Tricrepicephalus
• †Trimerorhachis
  • †Trimerorhachis greggi – type locality for species
  • †Trimerorhachis insignis – type locality for species
• †Triproetus
• Trochus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Tunstallia – report made of unidentified related form or using admittedly obsolete nomenclature
• Turbo – report made of unidentified related form or using admittedly obsolete nomenclature
• †Varanops
  • †Varanops brevirostris – type locality for species

• 

  †Varanosaurus – type locality for genus
  • †Varanosaurus acutirostris – type locality for species
• †Vidria
• †Waagenina
• †Waagenoceras
• †Waggoneria – type locality for genus
• †Walchia
• †Wattia – type locality for genus
• †Wilkingia
• †Worthenia
• †Wurmiella
  • †Wurmiella excavata
• †Xenacanthus
• †Xyloiulus – tentative report
• Yoldia – tentative report

• 

  †Zatrachys

Mesozoic

Selected Mesozoic taxa of Texas

• 

  †Acanthoceras
  • †Acanthoceras adkinsi
  • †Acanthoceras amphibolum
  • †Acanthoceras barcusi
  • †Acanthoceras eulessanum
  • †Acanthoceras johnsonanum
  • †Acanthoceras tarrantense
  • †Acanthoceras wintoni
  • †Acanthoceras worthense
• Acesta
• Acirsa
• Acmaea
• †Acompsoceras

• 

  †Acrocanthosaurus
  • †Acrocanthosaurus atokensis
• Acteon
• †Acteonella
• †Adelobasileus – type locality for genus
  • †Adelobasileus cromptoni – type locality for species
• †Adkinsia
• †Adocus
• †Aenona
• †Aetodactylus – type locality for genus
  • †Aetodactylus halli – type locality for species
• †Agerostrea
• †Agujaceratops
  • †Agujaceratops mariscalensis – type locality for species
• †Akera

• 

  †Alamosaurus
  • †Alamosaurus sanjuanensis
• †Albanerpeton
  • †Albanerpeton gracilis
  • †Albanerpeton nexuosus
• †Allocrioceras
• Alnus
• †Alphadon
  • †Alphadon halleyi – or unidentified comparable form
• †Ampullina – or unidentified comparable form
• Amusium
• †Anaklinoceras
• †Ancilla
• †Angistorhinus
  • †Angistorhinus grandis
• †Angulomastacator – type locality for genus
  • †Angulomastacator daviesi – type locality for species
• †Anisoceras
• Anomia
• †Anomoeodus
• †Anomotodon
• †Apachesaurus
  • †Apachesaurus gregorii
• Arca
• Architectonica

• 

  †Arganodus
  • †Arganodus dorotheae – type locality for species
• Arrhoges
• †Aspidoceras
• Astarte
• Astrangia
• Astreopora – tentative report
• †Astroconodon – type locality for genus
  • †Astroconodon denisoni – type locality for species
• †Astrodon
  • †Astrodon johnstoni
• †Astrophocaudia – type locality for genus
  • †Astrophocaudia slaughteri – type locality for species
• †Axonoceras

• 

  †Baculites
  • †Baculites aquilaensis - or unidentified loosely related form
  • †Baculites haresi – or unidentified comparable form
  • †Baculites ovatus
  • †Baculites scotti
  • †Baculites tippahensis
• †Baena – report made of unidentified related form or using admittedly obsolete nomenclature
• †Banis
• Barbatia – tentative report
• †Barroisiceras
• †Basilemys
• †Belemnitella
  • †Belemnitella americana
• †Belodon
• †Belonostomus
• †Bernissartia – tentative report
• †Betelgeusia – type locality for genus
  • †Betelgeusia reidi – type locality for species
• †Bostrychoceras
• Botula
  • †Botula carolinensis
  • †Botula conchafodentis

• 

  †Brachauchenius
  • †Brachauchenius lucasi
• Brachidontes
• †Brachychampsa
• †Brachysuchus – type locality for genus
  • †Brachysuchus megalodon – type locality for species
• †Bravoceratops – type locality for genus
  • †Bravoceratops polyphemus – type locality for species

• 

  †Brontopodus – type locality for genus
• Busycon – tentative report
• Cadulus
• Caestocorbula
  • †Caestocorbula crassaplica
  • †Caestocorbula crassiplica
  • †Caestocorbula suffalciata
  • †Caestocorbula terramaria
• Callianassa
• †Calliomphalus
  • †Calliomphalus americanus
• †Calyptosuchus – type locality for genus
  • †Calyptosuchus wellesi – type locality for species
• Calyptraea
• Cancellaria
• Cantharus – tentative report

• 

  †Caprina
• Capulus
• Carcharias
• †Caririchnium
• Carota
• Caryophyllia
• †Caseosaurus – type locality for genus
  • †Caseosaurus crosbyensis – type locality for species
• †Casierius
• †Catactegenys – type locality for genus
• †Caturus
• †Caveola
• †Cedarosaurus
  • †Cedarosaurus weiskopfae

• 

  †Ceratodus
• Cerithiella
  • †Cerithiella nodoliratum – or unidentified related form
  • †Cerithiella semirugatum
• Cerithium
• †Chamops
• †Champsosaurus
• †Chindesaurus
  • †Chindesaurus bryansmalli
• †Chinlea
• †Chirostenotes
• †Chupacabrachelys – type locality for genus
• Cidaris
• †Cimexomys
• †Cimoliasaurus

• 

  †Cimoliopterus
  • †Cimoliopterus dunni – type locality for species
• †Cimolodon
  • †Cimolodon electus – or unidentified comparable form
• †Cimolomys
  • †Cimolomys clarki
• †Clevosaurus – or unidentified comparable form
• †Clidastes
  • †Clidastes liodontus
• Cliona
• †Coahomasuchus – type locality for genus
  • †Coahomasuchus kahleorum – type locality for species
• †Coelodus
• †Coelophysis
• †Coilopoceras
  • †Coilopoceras springeri

• 

  †Collignoniceras
  • †Collignoniceras woollgari
• †Colognathus – type locality for genus
• †Coniasaurus
• †Continuoolithus
• †Conulus
• Corbicula
• Corbula
• †Coupatezia
• Crassostrea
• †Crenella
  • †Crenella elegantula
  • †Crenella serica

• 

  †Cretolamna
  • †Cretolamna appendiculata
• †Cretorectolobus
  • †Cretorectolobus olsoni – or unidentified comparable form
• †Crosbysaurus – type locality for genus
  • †Crosbysaurus harrisae – type locality for species
• Cucullaea
  • †Cucullaea capax
  • †Cucullaea powersi
• Cuspidaria
  • †Cuspidaria ampulla
  • †Cuspidaria grandis
  • †Cuspidaria grovensis
• †Cyathophora
• †Cyclothyris
• Cylichna
  • †Cylichna incisa
• †Cymatoceras
• †Cymella
• Cyzicus – tentative report
• †Dallasaurus – type locality for genus
  • †Dallasaurus turneri – type locality for species
• Dasmosmilia
  • †Dasmosmilia kochii – type locality for species
• Dasyatis

• 

  †Deinosuchus
  • †Deinosuchus riograndensis
  • †Deinosuchus rugosus – type locality for species
• Dentalium
  • †Dentalium leve
  • †Dentalium pauperculum
• †Desmatosuchus
  • †Desmatosuchus haplocerus
  • †Desmatosuchus smalli – type locality for species
  • †Desmatosuchus spurensis – type locality for species
• †Desmoceras
• Diodora – tentative report
• †Diphydontosaurus – or unidentified related form
• †Diploastrea
• Discorbis
• †Discoscaphites
  • †Discoscaphites conradi
• †Doswellia
• †Douvilleiceras
• †Dreissena

• 

  †Dromomeron
  • †Dromomeron gregorii – type locality for species
• †Dryptosaurus
• †Dufrenoyia
  • †Dufrenoyia justinae
• †Durania
• †Echinocorys
• †Ecphora
• †Ectenosaurus
• †Edmontonia – or unidentified comparable form
• †Elea – tentative report

• 

  †Enchodus
• †Episcoposaurus – type locality for genus
  • †Episcoposaurus haplocerus – type locality for species
• †Epitonium
  • †Epitonium sillimani
• †Eubostrychoceras
• †Eucalycoceras
• †Eugyra
• †Euhoplites – tentative report
• †Eulima
• †Euomphaloceras
• †Eupachydiscus
• †Euspira
• †Eutrephoceras
• †Ewingia – type locality for genus

• 

  †Exogyra
  • †Exogyra cancellata
  • †Exogyra costata
• †Fagesia
• †Faujasia
• †Favia
• †Flexomornis – type locality for genus
  • †Flexomornis howei – type locality for species
• †Flickia
• †Forbesiceras
• †Forresteria
• Fusinus
• Galeorhinus
• Gastrochaena
• Gegania
• †Gervillia
• Ginglymostoma

• 

  †Globidens
  • †Globidens dakotensis
• Globigerina
• Glossus
• Glycymeris
  • †Glycymeris rotundata
• †Glyptops – tentative report
• †Gobiates
• †Gryphaea
• †Gryposaurus – tentative report
• †Gypsichnites
• †Gyronchus
• Haminoea – tentative report
• †Hamites
• †Hamulus
• †Helicoceras
  • †Helicoceras navarroense
• †Hemicalypterus – tentative report

• 

  Heterodontus
• †Heteromorpha
• Hexanchus
• Homarus
• †Hoplochelys
• †Hoploscaphites
• †Hybodus
• †Hydnophora – tentative report
• †Hypophylloceras
• †Ichthyodectes

• 

  †Ichthyornis
  • †Ichthyornis dispar
• †Idoceras
• †Iguanodon – or unidentified comparable form
• †Inoceramus
  • †Inoceramus anomalus – or unidentified comparable form
  • †Inoceramus arnoldi
  • †Inoceramus arvanus
  • †Inoceramus balticus
  • †Inoceramus cordiformis – or unidentified comparable form
  • †Inoceramus deformis
  • †Inoceramus dimidius
  • †Inoceramus fragilis
  • †Inoceramus prefragilis
  • †Inoceramus vanuxemi – tentative report
• †Irenesauripus
• †Isastrea
• †Ischyrhiza
  • †Ischyrhiza avonicola
  • †Ischyrhiza mira
• †Jeletzkytes
  • †Jeletzkytes brevis
• †Kamerunoceras

• 

  †Koskinonodon – type locality for genus
• †Kritosaurus
• Lamna
• Latiaxis
• †Lepidotes
• Lepisosteus
• †Leptorhynchos – type locality for genus
  • †Leptorhynchos gaddisi – type locality for species
• †Leptostyrax
• †Leptosuchus
  • †Leptosuchus crosbiensis – type locality for species
  • †Leptosuchus imperfecta – type locality for species
  • †Leptosuchus studeri – type locality for species
• †Lewesiceras
• †Leyvachelys
  • †Leyvachelys cipadi
• †Libognathus – type locality for genus

• 

  †Libonectes
  • †Libonectes morgani – type locality for species
• Lima
• Limatula
• †Linearis
• Lingula
• †Linter
• †Linthia
• Linuparus
• †Lioestheria – tentative report
• Liquidambar – tentative report
• †Lissodus
• †Lithacoceras
• Lithophaga
• †Lonchidion

• 

  †Longosuchus
  • †Longosuchus meadei – type locality for species
• Lopha
  • †Lopha falcata
  • †Lopha mesenterica
• †Lucasuchus – type locality for genus
  • †Lucasuchus hunti – type locality for species
• Lucina
• †Macrepistius
• †Magnoavipes – type locality for genus
• †Malerisaurus

• 

  †Mammites
• †Mantelliceras
  • †Mantelliceras cantianum
• †Mariella
• †Martinectes
  • †Martinectes bonneri
• †Mathilda
• Megalomphalus – or unidentified comparable form
• †Megalosauropus – tentative report
• Melanatria
• Membranipora
• †Meniscoessus
• †Menuites
• Mesalia
• †Mesodma
• †Metoicoceras
  • †Metoicoceras geslinianum

• 

  †Metoposaurus
  • †Metoposaurus bakeri – type locality for species
• †Micraster
• †Modiolus
  • †Modiolus sedesclaris
  • †Modiolus sedesclarus
• Monodonta – tentative report
• †Monopleura – tentative report
• †Morea
• †Mortoniceras

• 

  †Mosasaurus
  • †Mosasaurus missouriensis – tentative report
• †Mytilus
• †Naomichelys
• Natica
• Nebrius
• †Neithea
  • †Neithea bexarensis
  • †Neithea quinquecostata
• †Neocardioceras
  • †Neocardioceras juddii

• 

  †Neohibolites
• †Neoptychites
• †Nerinea – tentative report
• Nerita
• Neritina
• †Nostoceras
  • †Nostoceras approximans
  • †Nostoceras splendidum
• Nucula
  • †Nucula camia
  • †Nucula cuneifrons
  • †Nucula percrassa
• †Nyssa
• †Odaxosaurus
  • †Odaxosaurus piger
• Odontaspis
• †Oklatheridium
  • †Oklatheridium minax
  • †Oklatheridium szalayi

• 

  †Onchopristis
• †Onchosaurus
• †Ophiomorpha
• †Ophiopsis – tentative report
• †Opis
• †Ornithomimus
• †Ostlingoceras
• Ostrea
• †Otischalkia – type locality for genus
  • †Otischalkia elderae – type locality for species
• †Oxyrhina
• †Pachycheilosuchus – type locality for genus
  • †Pachycheilosuchus trinquei – type locality for species
• †Pachydesmoceras
• †Pachydiscus

• 

  †Pachygenelus
• †Pachymelania
• Pagurus
• †Palaeobalistum
• †Palaeoctonus
• †Paleorhinus
  • †Paleorhinus sawini – type locality for species
• †Paluxysaurus – type locality for genus. Now regarded as a junior synonym of Sauroposeidon.^{[citation needed]}
  • †Paluxysaurus jonesi – type locality for species. Now regarded as a junior synonym of Sauroposeidon proteles.^{[citation needed]}
• †Paluxysuchus – type locality for genus
  • †Paluxysuchus newmani – type locality for species
• †Panis
• Panopea
• †Pappotherium – type locality for genus
• †Paracimexomys
• †Paramicrodon – type locality for genus
• †Paranomia

• 

  †Parapuzosia
• †Parasuchus
• †Paratypothorax
• †Paronychodon
  • †Paronychodon lacustris – or unidentified comparable form
• †Pawpawsaurus – type locality for genus
  • †Pawpawsaurus campbelli – type locality for species
• †Pecten
• †Pekinosaurus – or unidentified related form
  • †Pekinosaurus olseni
• Perna – report made of unidentified related form or using admittedly obsolete nomenclature
• Pholadidea

• 

  Pholadomya
  • †Pholadomya occidentalis
• Pholas
• †Phymosoma
• †Phytosaurus
• †Pinna
• Pitar
• †Placenticeras
  • †Placenticeras meeki
• †Planocephalosaurus
• †Platecarpus
  • †Platecarpus planifrons
  • †Platecarpus somenensis – or unidentified comparable form
  • †Platecarpus tympaniticus
• †Platyceramus
  • †Platyceramus cycloides
  • †Platyceramus mantelli - or unidentified loosely related form

• 

  †Platypterygius
• †Plesiosaurus
• Pleurotomaria
• †Plicatoscyllium – type locality for genus
• Plicatula
• †Plioplatecarpus – tentative report
• Polinices
• †Pollex
• †Polyptychodon
• †Poposaurus
  • †Poposaurus gracilis
• †Porituberoolithus

• 

  †Postosuchus – type locality for genus
  • †Postosuchus kirkpatricki – type locality for species
• †Procardia
• †Prognathodon – tentative report
• †Promystriosuchus – type locality for genus
• †Prosiren – type locality for genus
• †Protecovasaurus – type locality for genus
  • †Protecovasaurus lucasi – type locality for species
• †Protoavis – type locality for genus
  • †Protoavis texensis – type locality for species
• †Protocardia
• †Protohadros – type locality for genus
  • †Protohadros byrdi – type locality for species

• 

  †Protosphyraena
• †Pseudocorax
• †Pseudomelania
• †Pseudoperna
  • †Pseudoperna congesta
• †Pteranodon – or unidentified comparable form
• †Pteria
• †Pterotrigonia
  • †Pterotrigonia eufalensis
  • †Pterotrigonia eufaulensis
• †Ptychotrygon
• †Puzosia
• Pycnodonte
  • †Pycnodonte belli
  • †Pycnodonte mutabilis
  • †Pycnodonte vesicularis

• 

  †Quetzalcoatlus – type locality for genus
  • †Quetzalcoatlus northropi – type locality for species
• †Quitmaniceras
• Raja
• †Rewaconodon – or unidentified related form
  • †Rewaconodon tikiensis
• Rhinobatos
• †Rhombodus
• †Richardoestesia
  • †Richardoestesia gilmorei
  • †Richardoestesia isosceles – type locality for species
• †Rileymillerus – type locality for genus
• Ringicula
  • †Ringicula pulchella
• Rogerella
• †Romaniceras
• Rostellaria – tentative report
• †Russellosaurus – type locality for genus
  • †Russellosaurus coheni – type locality for species
• †Rutiodon
• †Sargana

• 

  †Sauroposeidon
  • †Sauroposeidon proteles
• †Saurornitholestes
  • †Saurornitholestes langstoni – or unidentified comparable form
• †Sauvagesia – tentative report
• †Scapanorhynchus
  • †Scapanorhynchus texanus
• †Scapherpeton
• †Scaphites
  • †Scaphites hippocrepis - or unidentified loosely related form
  • †Scaphites warreni
• †Schizobasis
• Scintilla – tentative report
• †Sclerorhynchus
• Scyliorhinus
• †Selaginella – or unidentified comparable form
• †Seminola – tentative report
• †Semionotus – or unidentified comparable form
• †Senis
• Serpula
• †Serratolamna
  • †Serratolamna serrata
• †Sexta

• 

  †Shuvosaurus – type locality for genus
  • †Shuvosaurus inexpectatus – type locality for species
• †Siderastrea
• †Sierritasuchus – type locality for genus
  • †Sierritasuchus macalpini – type locality for species
• †Skolithos
• Solemya
• †Sphenodiscus
  • †Sphenodiscus lobatus
  • †Sphenodiscus pleurisepta
• †Spinosuchus – type locality for genus
  • †Spinosuchus caseanus – type locality for species
• †Spironema
• Spondylus
• Squalicorax
  • †Squalicorax kaupi
  • †Squalicorax pristodontus
• Squalus
• †Squatirhina
  • †Squatirhina americana

• 

  †Struthiomimus – or unidentified comparable form
• †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
• †Tenea

• 

  †Tenontosaurus
  • †Tenontosaurus dossi – type locality for species
• Teredolites
• †Terlinguachelys – type locality for genus
  • †Terlinguachelys fischbecki – type locality for species
• †Terminonaris
  • †Terminonaris robusta – or unidentified comparable form
• †Texacephale – type locality for genus
  • †Texacephale langstoni – type locality for species
• †Texasetes – type locality for genus
  • †Texasetes pleurohalio – type locality for species
• Textularia
• †Thamnasteria
• †Thamnoseris – tentative report
• †Thomasites
• Trachycardium
  • †Trachycardium eufaulensis

• 

  †Triceratops
• †Trigonia
• †Trilophosaurus – type locality for genus
  • †Trilophosaurus buettneri – type locality for species
  • †Trilophosaurus jacobsi
• †Trinacromerum – type locality for genus
  • †Trinacromerum bentonianum – type locality for species
• †Triodus
• †Triopticus – type locality for genus
• †Trochactaeon
• Tryonia

• 

  †Turrilites
  • †Turrilites acutus
• Turritella
  • †Turritella bilira
  • †Turritella forgemoli – or unidentified comparable form
  • †Turritella hilgardi
  • †Turritella paravertebroides
  • †Turritella trilira
  • †Turritella vertebroides
• †Tylosaurus
  • †Tylosaurus kansasensis
  • †Tylosaurus nepaeolicus
  • †Tylosaurus proriger – or unidentified comparable form
• †Typothorax

• 

  †Tyrannosaurus
  • †Tyrannosaurus rex
• †Uktenadactylus
• Unio
• †Upogebia
• †Vancleavea
  • †Vancleavea campi
• †Vascellum
• †Vascoceras
• Venericardia
• †Vinella
• Viviparus – tentative report
• Volsella
• Vulsella

• 

  †Wannchampsus – type locality for genus
• †Wannia
  • †Wannia scurriensis – type locality for species
• †Woodbinesuchus – type locality for genus
  • †Woodbinesuchus byersmauricei – type locality for species
• †Wrightoceras
• Xanthosia
• †Xenacanthus – report made of unidentified related form or using admittedly obsolete nomenclature
• Xenophora
• †Xiphactinus
• †Yezoites
• Yoldia

Cenozoic

Selected Cenozoic taxa of Texas

• Abra
• Acanthocardia
• Acar
• Acirsa
• †Aclistomycter
• Acris
  • †Acris crepitans
• Acteocina
• Acteon
• Admetula
• Adrana
• Aedes
• †Aelurodon

• 

  †Aepycamelus
• Agaronia
• Agkistrodon
• †Agriocharis
• †Agriochoerus
• †Agriotherium
• †Aguascalientia
• Akera
• †Alforjas
• Aliculastrum
• †Allaeochelys – or unidentified comparable form
• Alligator
  • †Alligator mississipiensis
  • †Alligator mississippiensis
  • †Alligator olseni

• 

  †Allognathosuchus
• †Allomorone
• Alvania
• †Amblema
  • †Amblema plicata
• †Ambystoma
  • †Ambystoma tigrinum
• †Amebelodon
• †Ameiurus
• Amnicola
• †Amphicyon
• †Amphimachairodus
• Amphiuma
• †Ampullina
• Amusium
• Anadara

• 

  †Anancus
• †Anchitheriomys
• †Anchitherium
• Ancilla
• †Angelarctocyon
  • †Angelarctocyon australis – type locality for species
• †Annona
• Anodontia
• Anomia
• Antalis
• Anthonomus – tentative report
• Antillophos
• Antrozous
  • †Antrozous pallidus
• †Aphelops
• †Aplexia
• Aplodinotus
  • †Aplodinotus grunniens
• Aquila
  • †Aquila chrysaetos
• Arca
• †Archaeohippus
• †Archaeotherium
• Architectonica
• †Arctocyon

• 

  †Arctodus
  • †Arctodus simus
• †Arctonasua
• Argobuccinum
• Argyrotheca
• Arius – or unidentified comparable form
• Arizona
  • †Arizona elegans
• †Artocarpus
• Astarte
• Asthenotoma
• †Astrohippus
• Athleta
• Atlanta
• Atractosteus
  • †Atractosteus spatula
  • †Atractosteus tristoechus – tentative report
• Atrina

• 

  †Aturia
• Atys
• †Australocamelus
• †Awateria
• Baiomys
• †Baiotomeus
  • †Baiotomeus douglassi
• Balanophyllia
• Balanus
• †Baluchicardia
• Bankia
• Barbatia
• †Barbourofelis
  • †Barbourofelis whitfordi
• Bassariscus
• †Bathygenys
• Bathytoma
  • †Bathytoma nonplicata – or unidentified comparable form
• †Batrachosauroides
• Bela – report made of unidentified related form or using admittedly obsolete nomenclature
• †Belosaepia
• †Belosepia
• Bison
  • †Bison antiquus

  • 

    †Bison latifrons
• Bittiolum – report made of unidentified related form or using admittedly obsolete nomenclature
• Bittium
• †Blancocamelus
• Blarina
  • †Blarina brevicauda – or unidentified comparable form
• †Blastomeryx
• †Boavus – tentative report
• †Bonellitia
• †Borealosuchus

• 

  †Borophagus
  • †Borophagus diversidens
  • †Borophagus hilli – type locality for species
  • †Borophagus pugnator – or unidentified comparable form
  • †Borophagus secundus
• †Boverisuchus
  • †Boverisuchus vorax – or unidentified comparable form
• Brachidontes
• †Brachyhyops
• †Brachyrhynchocyon
• Bregmaceros
• †Bryozoan
• Bufo
  • †Bufo cognatus
  • †Bufo woodhousei
• Bulimulus
  • †Bulimulus dealbatus
• Bullia
• Cadulus
• Caecum – or unidentified comparable form
• Caestocorbula
• †Calappilia
• †Calippus
• Callianassa
• Calyptraea

• 

  †Camelops
  • †Camelops hesternus – type locality for species
  • †Camelops minidokae
• Cancellaria
• Candona
• Canis
  • †Canis armbrusteri
  • †Canis dirus
  • †Canis edwardii
  • †Canis latrans
  • †Canis lepophagus – type locality for species
• Cantharus

• 

  †Capromeryx
• Capulus
• Carapus
• Carcharhinus
• †Carpocyon
• Carychium
  • †Carychium exiguum
• Caryophyllia
• Castor
  • †Castor canadensis
• Catagonus
• †Caveola
• Celtis
• Centropomus – tentative report

• 

  †Ceratogaulus
  • †Ceratogaulus anecdotus – or unidentified comparable form
• †Cerdocyon
• Cerithiella
• Cerithiopsis
• Cerithium – tentative report
• Chaetodipus
  • †Chaetodipus hispidus
• Chama
• Charina
• †Charophyte

• 

  †Chasmaporthetes
• Chironomus
• Chlamys
• †Chriacus
• †Cimolodon
• Cirsotrema
• Cissus
• Clavilithes
• Clavus – tentative report
• Closia
• Clypeaster
• Cochlespira
• Cochliolepis
• †Colodon
• Coluber

  • 

    †Coluber constrictor
• Colubraria
• Columbella – report made of unidentified related form or using admittedly obsolete nomenclature
• †Colwellia
• †Combretum
• Cominella – or unidentified comparable form
• Conomitra
• Conus
• Corbicula
• Corbula
• †Cormohipparion
• †Corvina
• Corvus
  • †Corvus brachyrhynchos
• †Coryphodon

• 

  †Cranioceras
• Crassostrea
  • †Crassostrea contracta
• Cratogeomys
  • †Cratogeomys castanops
• Crenella
• †Cristellaria
• Crotalus
  • †Crotalus atrox
  • †Crotalus horridus
• Crotaphytus
  • †Crotaphytus collaris
  • †Crotaphytus reticulatus
• Cryptotis
  • †Cryptotis parva
• Cucullaea
• Culex
• Cuna
• Cuspidaria
  • †Cuspidaria grandis

• 

  †Cuvieronius
• Cyclammina
• Cylichna
• †Cylindracanthus
• Cyllene – or unidentified comparable form
• †Cynarctoides
• †Cynarctus
• Cynomys
  • †Cynomys ludovicianus
• Cypraea
• Cypraedia
• Cythara
• †Daphoenictis

• 

  †Daphoenodon
• †Daphoenus
  • †Daphoenus lambei – or unidentified comparable form
• Dasyatis
• Dasypus
  • †Dasypus bellus
• Dentalium
• Dermatemys
• †Desmatippus
• †Diaphyodus
• †Dibelodon
• †Diceratherium
• Didelphis
  • †Didelphis marsupialis
• †Dinofelis
• †Dinohippus
• †Dinohyus
  • †Dinohyus hollandi
• Diplotaxis – or unidentified comparable form
• Dipodomys
  • †Dipodomys merriami
  • †Dipodomys ordii
  • †Dipodomys spectabilis
• †Discradisca
• Disonycha
• †Dolicholatirus
• Dorsanum

• 

  †Duchesneodus
• †Echmatemys
• Elaphe
  • †Elaphe guttata
  • †Elaphe obsoleta
• Eleutherodactylus
  • †Eleutherodactylus augusti
• †Ellisella
• Emarginula – or unidentified comparable form
• Endochironomus
• †Eomellivora
• †Eosurcula
• Epicauta

• 

  †Epicyon
  • †Epicyon haydeni
• †Epihippus
• Epitonium
• Eptesicus
  • †Eptesicus fuscus
• Equus
  • †Equus alaskae – or unidentified comparable form
  • †Equus conversidens
  • †Equus francisci – type locality for species
  • †Equus giganteus
  • †Equus idahoensis
  • †Equus scotti – type locality for species
  • †Equus semiplicatus

  • 

    †Equus simplicidens
• Erethizon
  • †Erethizon dorsatum
• †Eucyon
  • †Eucyon davisi
• Eulima
• Eumeces
  • †Eumeces fasciatus
  • †Eumeces obsoletus
• †Euonymus
• Eupleura
• Euspira
• †Eutrephoceras
• †Exilia
• Fasciolaria – tentative report
• Felis
• †Ficopsis

• 

  Ficus
• Flabellum
• †Floridachoerus – tentative report
• †Floridatragulus
• Formica
• Fossaria
• Fulgurofusus
• †Fusconaia
• Fusinus
• Fustiaria
• Gadila
• Galeocerdo
• Galeodea
• Gastrocopta
  • †Gastrocopta armifera
  • †Gastrocopta contracta
  • †Gastrocopta pellucida
  • †Gastrocopta pentodon
• †Gavialosuchus
• Gegania
• Geochelone
• Geomys
  • †Geomys bursarius
• †Gigantocamelus
• †Glossotherium
• Glycymeris
• Glyptoactis
• †Glyptotherium
  • †Glyptotherium texanum
• Glyptozaria
• †Gnathabelodon
• †Gomphotherium
• †Goniobasis
• Gopherus – type locality for genus
  • †Gopherus polyphemus – type locality for species
• Graptemys
  • †Graptemys geographica
• Gregariella
• †Gulfoceras
• †Gustafsonia
• Guttulina
• Gyraulus
  • †Gyraulus parvus
• †Hadrianus

• 

  †Haplohippus
• Harpa
• †Harpactocarcinus
• †Harpagolestes
• Hastula
• Haustator
• Hawaiia
  • †Hawaiia minuscula

• 

  †Hayoceros
• Helicina
  • †Helicina orbiculata
• Helicodiscus
  • †Helicodiscus parallelus
• Helisoma
  • †Helisoma anceps
  • †Helisoma trivolvis
• Heloderma
• †Hemiauchenia
  • †Hemiauchenia macrocephala
• †Herpetotherium
• †Hesperotestudo
• †Heteraletes
• Heterodon

  • 

    †Heterodon nasicus – or unidentified comparable form
  • †Heterodon platyrhinos – or unidentified comparable form
• †Heteromeryx
• Hexaplex
• †Hipparion
• †Hippidion
• Hippodamia
  • †Hippodamia convergens – tentative report
• Hipponix
• †Hippotherium
• Holbrookia
• †Holmesina

• 

  †Homotherium
  • †Homotherium serum
• †Hyaenodon
  • †Hyaenodon crucians
  • †Hyaenodon horridus – or unidentified comparable form
  • †Hyaenodon montanus
  • †Hyaenodon raineyi
  • †Hyaenodon vetus – or unidentified comparable form
• Hyla
• †Hyopsodus
• Hyotissa
• †Hypertragulus
• †Hypohippus
• †Hypolagus
• †Hyrachyus
• †Hyracodon
• †Hyracotherium
  • †Hyracotherium vasacciense
• Ictalurus
  • †Ictalurus punctatus
• †Ictiobus

• 

  †Indarctos
• †Inga
• †Ischyrocyon
• †Ischyromys
• Isognomon
• †Jefitchia – type locality for genus
• Juglans
• †Kalobatippus
• Kinosternon
  • †Kinosternon flavescens
• Kuphus
• †Lacunaria
• †Lambdoceras
• †Lambertocyon
  • †Lambertocyon eximius

• 

  Lampropeltis
  • †Lampropeltis getulus
  • †Lampropeltis triangulum
• Lasionycteris
  • †Lasionycteris noctivagans
• Lasiurus
  • †Lasiurus borealis
• Latirus
• †Ledina
• †Leea
• Lepisosteus
  • †Lepisosteus spatula – or unidentified comparable form
• Lepomis
  • †Lepomis cyanellus – or unidentified comparable form
• †Leptictis

• 

  †Leptocyon
• †Leptoreodon
• Lepus
  • †Lepus californicus
• Limacina
• Limaria
• †Limnenetes
• †Linthia
• Lithophaga
• Litiopa
• Littorina
• †Longirostromeryx

• 

  Lovenia
• Lucina
• Lunatia – report made of unidentified related form or using admittedly obsolete nomenclature
• Lunularia – tentative report
• Lymnaea
• Lynx
  • †Lynx rufus
• Lyria
• Lytta
• †Machairodus
• Macrocallista
• Mactra
• Madrepora
• Magnolia
• †Mahgarita
• †Mammut
  • †Mammut americanum
• †Mammuthus

  • 

    †Mammuthus columbi
• Marginella
• Marmota
  • †Marmota flaviventris
• Martes
• Martesia
• †Mathilda – tentative report
• †Mathilda – or unidentified comparable form
• †Mathilda
• †Mauricia
• †Megalictis – tentative report
• †Megalonyx
  • †Megalonyx jeffersonii – or unidentified comparable form
  • †Megalonyx leptostomus

• 

  †Megatherium
• †Megatylopus
• Melanella
• †Menetus
• †Menoceras
• †Menops
• Mephitis
  • †Mephitis mephitis
• Meretrix
• †Merychippus
  • †Merychippus sejunctus
• †Merychyus

• 

  †Merycoidodon
• Mesalia
• †Mescalerolemur – type locality for genus
  • †Mescalerolemur horneri – type locality for species
• Mesodesma
• †Mesodma
  • †Mesodma pygmaea – or unidentified comparable form
  • †Mesodma thompsoni
• †Mesohippus
• †Metalopex

• 

  †Metamynodon
• Metula
• †Michela
• †Michenia
• Microdrillia
• Micropterus
• †Microsyops
• †Microtomarctus
• Microtus
  • †Microtus mexicanus
  • †Microtus pennsylvanicus
  • †Microtus pinetorum
• Micrurus
  • †Micrurus fulvius
• †Mimetodon
• †Miocyon
• †Miohippus
• †Miracinonyx
  • †Miracinonyx inexpectatus – or unidentified comparable form
  • †Miracinonyx studeri
• Mitrella
• Modiolus – tentative report
• †Moropus
• †Morrillia
• Murex
• Mustela
  • †Mustela vison
• Myctophum
• Myliobatis
• †Mylohyus
  • †Mylohyus fossilis
• Myotis
  • †Myotis lucifugus
  • †Myotis velifer
• Mytilus
• Myzinum – or unidentified comparable form

• 

  †Nannippus
• †Nanotragulus
• Narona
• Nassarius
• Nasua
• Natica
• Naticarius
• Natrix
  • †Natrix erythrogaster
• Nectandra
• †Neochoerus – type locality for genus
  • †Neochoerus pinckneyi
• Neofiber

• 

  †Neohipparion
• Neotamias
  • †Neotamias cinereicollis
• Neotoma
  • †Neotoma albigula
  • †Neotoma floridana
  • †Neotoma mexicana
  • †Neotoma micropus
• Neptunea – report made of unidentified related form or using admittedly obsolete nomenclature
• Nerodia
  • †Nerodia fasciata
• Neverita
• †Nexuotapirus
• †Nimravides
• Niptus
• Norrisia
• †Notharctus
  • †Notharctus tenebrosus
• †Nothokemas

• 

  †Nothrotheriops
• †Nothrotherium
• Notiosorex
  • †Notiosorex crawfordi
• †Notiotitanops
• Notophthalmus
• Nucula
• Nysius – tentative report
• Oculina
• Odocoileus
  • †Odocoileus virginianus

• 

  Odontaspis
• Odostomia
• Olivella
• Ondatra
  • †Ondatra zibethicus
• Onychomys
  • †Onychomys leucogaster
  • †Onychomys torridus
• Opalia
• Opheodrys
  • †Opheodrys aestivus
• Ophisaurus
• †Oreodaphne
• Oryzomys
  • †Oryzomys palustris

• 

  †Osbornoceros – tentative report
• Ostrea
• Ovis
  • †Ovis canadensis
• †Oxydactylus
• †Pachecoa
• †Palaeolama
• †Palaeophis
• Panopea
• Panthera
  • †Panthera leo
  • †Panthera onca
• †Paraenhydrocyon
• †Parahippus
  • †Parahippus leonensis – type locality for species
• †Paralbula

• 

  †Paramylodon
  • †Paramylodon harlani
• †Paramys
• †Paratoceras
• †Paratomarctus
• †Parectypodus
  • †Parectypodus sloani
• †Paronychomys – tentative report
• †Parvitragulus
• †Pediomeryx

• 

  †Peltosaurus – tentative report
• †Peraceras
• †Peratherium
• Perognathus
  • †Perognathus flavus
• Peromyscus
  • †Peromyscus boylii
  • †Peromyscus difficilis
  • †Peromyscus eremicus
  • †Peromyscus gossypinus
  • †Peromyscus leucopus
  • †Peromyscus maniculatus
  • †Peromyscus pectoralis
• Phaedon – or unidentified comparable form
• Phalium
• †Phenacodus
• Philine

• 

  †Phlaocyon
  • †Phlaocyon annectens
  • †Phlaocyon minor
• Pholadomya
• Pholas
• Phos
• Phrynosoma
  • †Phrynosoma cornutum
• Phyllodus
• Physa
• Pinna – tentative report
• Pisidium
  • †Pisidium nitidum
• Pitar
• Pituophis
  • †Pituophis melanoleucus
• Planorbis

• 

  †Platygonus
  • †Platygonus compressus
• †Pleiolama
• †Plesiocolopirus
• †Plesiogulo
• Pleurocera
• Pleurofusia
• Pleuromeris
• Pleuroploca
• †Pleurostoma
• Pleurotomella
• Plicatula

• 

  †Pliohippus
• †Pliometanastes
• †Poabromylus
• Podomys
• †Poebrotherium
• Polinices
• Polydora
• Polygyra
• Polyschides
• Porites
• †Potamides
• †Priscocamelus
• †Pristichampsus
• Pristis
• †Procamelus
  • †Procamelus leptognathus
  • †Procamelus occidentalis
• †Procastoroides
• †Procynodictis
• Procyon
  • †Procyon lotor
• †Prohesperocyon
  • †Prohesperocyon wilsoni
• Propeamussium
• †Prosimnia
• †Prosynthetoceras
• †Protitanotherium
• †Protoceras – tentative report
• †Protohippus
• †Protolabis
• †Protylopus – tentative report
• Pseudacris
  • †Pseudacris ocularis
  • †Pseudacris streckeri

• 

  †Pseudaelurus – tentative report
• †Pseudhipparion
• Pseudochama
• Pseudoliva
• †Pseudoprotoceras
• †Psittacotherium
• Pteria
• Pteris
• Pterothrissus
• Pterynotus

• 

  †Ptilodus
  • †Ptilodus mediaevus
• Ptinus
• Puma
  • †Puma concolor
• Pupilla
  • †Pupilla blandi
• Pupoides
• Pycnodonte
• †Pylodictis
  • †Pylodictis olivaris
• Pyramidella
• †Quadrula
• Quinqueloculina
• †Raja
  • †Raja texana – type locality for species
• †Rana

  • 

    †Rana catesbiana – lapsus calami of Rana catesbeiana
  • †Rana pipiens
• Ranularia
• Raphitoma
• Reithrodontomys
  • †Reithrodontomys fulvescens
  • †Reithrodontomys megalotis
  • †Reithrodontomys montanus
• †Retinella
• Retusa
• Rhinobatos
• Rhinocheilus
  • †Rhinocheilus lecontei
• Rhinoptera

• 

  †Rhynchotherium – tentative report
• Rimella
• Ringicula
• †Rooneyia – type locality for genus
  • †Rooneyia viejaensis – type locality for species
• †Rotalia
• †Rotularia
• Salvadora
• †Sapindus
• Sassia
• Scalopus
  • †Scalopus aquaticus
• Scaphander
• Scaphella

• 

  Scaphiopus
• †Scaphites
• Sceloporus
  • †Sceloporus olivaceus
  • †Sceloporus undulatus
• Sciurus
  • †Sciurus carolinensis
  • †Sciurus niger
• †Selaginella
• Selenophorus – or unidentified comparable form
• Semele
• Serpulorbis
• Sigatica
• Sigmodon

  • 

    †Sigmodon hispidus
• Siliqua
• Simnia
• †Sinopa
• Sinum
• Siphonalia
• Siren
  • †Siren miotexana – type locality for species
• Skena
• Skenea

• 

  †Smilodon
  • †Smilodon fatalis
• †Soergelia
  • †Soergelia mayfieldi
• Solariella
• Solemya
• Solen
• †Sophora
• Sorex
  • †Sorex cinereus
  • †Sorex palustris
  • †Sorex vagrans
• Spermophilus
  • †Spermophilus elegans – or unidentified comparable form

  • 

    †Spermophilus spilosoma
  • †Spermophilus tridecemlineatus
  • †Spermophilus variegatus
• Sphaerium
• Spilogale
  • †Spilogale putorius
• Spirorbis
• Spirotropis
• Spisula
• Stagnicola
  • †Stagnicola reflexa

• 

  †Stegomastodon
  • †Stegomastodon mirificus
• †Steneofiber
• †Stenomylus
• †Stenotrema
• Sternotherus
• Sthenictis
• †Stockoceros – or unidentified comparable form
• Storeria
  • †Storeria dekayi
• †Striatolamia
• Strobilops
• †Stygimys

• 

  †Stylinodon
• Succinea
• Sylvilagus
  • †Sylvilagus audubonii
  • †Sylvilagus floridanus
• Synaptomys
  • †Synaptomys cooperi
• †Synthetoceras
  • †Synthetoceras tricornatus – type locality for species
• Syrphus – or unidentified comparable form
• Tantilla
• Tanytarsus – tentative report
• Tapirus
  • †Tapirus veroensis
• Taxidea
  • †Taxidea taxus
• Teinostoma

• 

  †Teleoceras
  • †Teleoceras major
• Tellina
• Tenagodus
• †Tephrocyon
• Terebellum
• Terebra
• Teredo
• Terminalia
• Terrapene

  • 

    †Terrapene carolina
  • †Terrapene ornata
• Testudo
• †Tetrameryx
• Thamnophis
  • †Thamnophis proximus
  • †Thamnophis saurita
  • †Thamnophis sirtalis
• Theodoxus
• †Thinobadistes
• Thomomys
  • †Thomomys bottae
  • †Thomomys talpoides – or unidentified comparable form
• †Ticholeptus

• 

  †Titanoides
  • †Titanoides gidleyi – or unidentified comparable form
• †Tomarctus
  • †Tomarctus brevirostris
• †Toromeryx
• †Trigonias – tentative report
• Trigonostoma
• †Trinacria
• †Tripia
• Trochita
• Tropidoclonion
  • †Tropidoclonion lineatum
• †Truncilla
  • †Truncilla truncata
• †Trygon
• †Tuba
• Tucetona
• Turbonilla
• Turricula
• Turris
• Turritella
• Tympanuchus
• Typhina
• Tyto
  • †Tyto alba

• 

  †Uintatherium – or unidentified comparable form
  • †Uintatherium anceps
• Umbraculum
• Unio
• Urocyon
  • †Urocyon cinereoargenteus – or unidentified comparable form
• Ursus
  • †Ursus americanus
• †Ustatochoerus
• Vallonia
  • †Vallonia gracilicosta
  • †Vallonia parvula
• Venericardia
• Verticordia
• Vertigo
  • †Vertigo ovata
• †Viridomys
• †Volvariella
• Vulpes
  • †Vulpes velox
  • †Vulpes vulpes

• 

  †Xenocyon
• Xenophora
• Yoldia
• †Yumaceras
• Zonitoides
  • †Zonitoides arboreus