List of the prehistoric life of Oklahoma facts for kids

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

Precambrian

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

Paleozoic

Selected Paleozoic taxa of Oklahoma

• †Abyssomedon – type locality for genus
  • †Abyssomedon williamsi – type locality for species
• 

  Restoration of the Permian amphibian Acheloma
  †Acheloma
  • †Acheloma cumminsi – or unidentified comparable form
  • †Acheloma dunni – type locality for species
• †Acleistorhinus – type locality for genus
  • †Acleistorhinus pteroticus – type locality for species
• †Albertoceras
• †Alethopteris
  • †Alethopteris serlii
• †Alexandrinia
  • †Alexandrinia directa – type locality for species
• Ammodiscus
• †Amphiscapha
• †Anabathra
• †Ananaspis
• †Anataphrus
• †Angelosaurus
  • †Angelosaurus romeri – type locality for species
• † Anisophyllum
• 

  Fossil of the Carboniferous horsetail relative Annularia
  †Annularia
  • †Annularia sphenophylloides
  • †Annularia stellata
• †Anomphalus
• †Anthracoceras
• †Aphlebia
• †Archaeocidaris
• Archaeolithophyllum
• †Archeria
• †Archimedes
  • †Archimedes distans
  • †Archimedes meekanoides
  • †Archimedes meekanus – or unidentified comparable form
• †Arkanites
• †Aspidosaurus – or unidentified comparable form
• †Athyris
• †Atrypa
• 

  Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten
  †Aviculopecten
  • †Aviculopecten halensis
  • †Aviculopecten multilineatus
  • †Aviculopecten nodocosta – type locality for species
• †Avonia – tentative report
• †Axinolobus
• †Baeotherates – type locality for genus
  • †Baeotherates fortsillensis – type locality for species
• †Bellerophon
• †Benthamaspis
• †Bicornella
• †Bilinguites
• †Bisatoceras – type locality for genus
• †Bolbocephalus
• †Bolosaurus
  • †Bolosaurus grandis – type locality for species
  • †Bolosaurus striatus
• †Bolterpeton – type locality for genus
• †Bothriocidaris
• 

  Life restoration of the Permian amphibian Cacops
  †Cacops
  • †Cacops morrisi – type locality for species
  • †Cacops woehri – type locality for species
• †Calamites
• †Callipteris
• †Calymene
  • †Calymene clavicula
• †Calyptaulax
• †Camarotoechia
• † Camerate
• †Campbelloceras
• †Cancelloceras
• †Capnophyllum
• 

  Fossilized skeletons of the Permian reptile Captorhinus
  †Captorhinus
  • †Captorhinus aguti
• †Cardiocephalus
  • †Cardiocephalus peabodyi – type locality for species
  • †Cardiocephalus sternbergi – or unidentified comparable form
• †Carolinites
• †Ceramopora
• †Ceratiocaris
• †Ceratocephala
• †Ceraurinella
• †Ceraurus
• 

  Fossil of the Cambrian-Middle Devonian trilobite Cheirurus
  †Cheirurus
• †Chonetes
  • †Chonetes mesoloba
• †Cladochonus
• †Cleiothyridina
  • †Cleiothyridina orbicularis
• †Clepsydrops
• Cliona
• †Colobomycter – type locality for genus
  • †Colobomycter pholeter – type locality for species
• †Composita
  • †Composita mexicana
  • †Composita rotunda
  • †Composita subcircularis
  • †Composita subtilita
• †Coolinia
• †Cordania
  • †Cordania falcata
• †Cordylodus
• †Cornulites
• 

  Mounted fossilized skeleton of the Permian synapsid (mammal precursor) Cotylorhynchus
  †Cotylorhynchus – type locality for genus
  • †Cotylorhynchus bransoni – type locality for species
  • †Cotylorhynchus romeri – type locality for species
• Crania
• †Craniops
• †Cravenoceras
• †Cricotus
• †Crossotelos – type locality for genus
• †Ctenacanthus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Curtognathus
• †Cybelopsis
• †Cycloceras
• †Cyclonema
• 

  Fossilized foliage from the Carboniferous seed fern Cyclopteris
  †Cyclopteris
• †Cyphaspis
• †Cyrtograptus
• †Cystodictya
  • †Cystodictya elegans – type locality for species
• †Dalmanites
• †Delorhynchus – type locality for genus
  • †Delorhynchus cifellii – type locality for species
  • †Delorhynchus priscus – type locality for species
• †Diacalymene
• †Diadectes
• †Dicoelosia
• †Dicranurus
  • †Dicranurus hamatus
• †Dictyonema
• †Dimeropygiella
• 

  Life restoration of the Permian synapsid (mammal precursor) Dimetrodon
  †Dimetrodon
  • †Dimetrodon dollovianus
  • †Dimetrodon limbatus – or unidentified comparable form
  • †Dimetrodon loomisi
  • †Dimetrodon macrospondylus
• †Diplocaulus – type locality for genus
  • †Diplocaulus magnicornis
• †Diplograptus
• †Discitoceras
• †Doleserpeton – type locality for genus
• †Domatoceras
• †Eatonia
• †Echinaria
• †Echinosphaerites
• †Ectosteorhachis
• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Edaphosaurus
  †Edaphosaurus
  • †Edaphosaurus cruciger
• †Edestus – type locality for genus
• †Edmondia
• †Eodictyonella
• †Eospirifer
• †Epiphyton
• †Eryops
  • †Eryops megacephalus
• †Estheria
• †Eucalyptocrinites
• †Euryodus
  • †Euryodus dalyae – type locality for species
  • †Euryodus primus – or unidentified comparable form
• †Favosites
• †Fayella – type locality for genus
• †Feeserpeton – type locality for genus
  • †Feeserpeton oklahomensis – type locality for species
• 

  Fossil of the Middle Ordovician-Late Triassic bryozoan ("moss animal") Fenestella
  †Fenestella
  • †Fenestella cestriensis
  • †Fenestella exigua
• †Foerstia
• †Fragiscutum
• †Frencrinuroides
• †Fusulina
• †Gastrioceras
• †Girvanella
• †Glaphurochiton
• †Glyptopleura
• †Gnathodus
• 

  Life restoration of the Permian lungfish Gnathorhiza
  †Gnathorhiza
• †Goniatites
• †Gotlandochiton
• †Gymnophyllum
  • †Gymnophyllum wardi
• †Hallopora
• †Halysites
• †Hapsidopareion – type locality for genus
  • †Hapsidopareion lepton – type locality for species
• †Helminthochiton
• †Hibbertia
• †Hindia
• †Holopea – tentative report
• †Huntoniatonia
• †Idiognathodus
• †Illaenus
• 

  Fossil of the Middle-Late Ordovician giant trilobite Isotelus.
  †Isotelus
• †Ivoechiton
• †Jeffersonia
• †Kainops
• †Kawina
• †Kennedya
• †Kockelella
• †Krausella
• †Labidosaurikos – type locality for genus
• 

  Life restoration of the Permian reptile Labidosaurus
  †Labidosaurus
• †Leonaspis
• †Lepidodendron
• Lingula
• †Lingulella
• †Liroceras
• †Lisca
• Lithophaga
• †Llistrofus – type locality for genus
• †Lonchodomas
• †Lutesvillia
• 

  Life restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior
  †Lysorophus
• †Macroleter
  • †Macroleter agilis – type locality for species
• †Marsupiocrinus
• †Maximites
• †Mcqueenoceras
• †Meganeuropsis
• †Meristella
• †Meristina
• †Metacoceras
• †Michelinoceras
• †Micraroter – type locality for genus
  • †Micraroter erythrogeios – type locality for species
• †Microleter – type locality for genus
  • †Microleter mckinzieorum – type locality for species
• †Micula – tentative report
• †Misthodotes
• Modiolus
• †Monograptus
• †Moravia
• 

  Life restoration of the Permian synapsid (mammal precursor) Mycterosaurus
  †Mycterosaurus – type locality for genus
  • †Mycterosaurus longiceps – type locality for species
• †Nannaroter – type locality for genus
• †Nannospondylus – type locality for genus
• †Naticopsis
  • †Naticopsis transversa – type locality for species
• †Neospirifer
  • †Neospirifer dunbari
• †Neuropteris
  • †Neuropteris heterophylla
  • †Neuropteris obliqua
  • †Neuropteris rarinervis
• Nucula
• †Odontochile
• †Oinochoe
• † Oliveria
• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
  †Ophiacodon
  • †Ophiacodon major
  • †Ophiacodon mirus – or unidentified comparable form
  • †Ophiacodon uniformis
• †Opisthodontosaurus – type locality for genus
• †Oromycter – type locality for genus
  • †Oromycter dolesorum – type locality for species
• †Orovenator – type locality for genus
  • †Orovenator mayorum – type locality for species
• †Orthacanthus
• †Orthoceras
• †Oulodus
• †Ozarkodina
  • †Ozarkodina confluens
• †Pachylyroceras
• 

  Fossil of the trilobite Paciphacops
  †Paciphacops
• †Paladin
• Palaeoaplysina – tentative report
• †Paleochiton
• †Paralegoceras
• †Pasawioops – type locality for genus
• †Pecopteris
  • †Pecopteris hemitelioides
• †Pentremites
• †Peripetoceras
• †Perryella – type locality for genus
• †Petalodus
• †Phillipsia – tentative report
• †Phragmolites
• †Pinnularia
• †Plaesiomys
• †Platyceras
• †Platycrinites
• †Platysomus
• †Platystrophia
• †Plectodonta
• †Pleuracanthus
• 

  Fossil of the Late Ordovician cystoid echinoderm Pleurocystites
  †Pleurocystites
• †Plicochonetes
• †Polygnathodella – type locality for genus
• †Polygnathus
• †Prioniodus
• †Prodentalium
• †Proetus
• †Protocaptorhinus
  • †Protocaptorhinus pricei
• †Punka
• †Rayella
• †Rayonnoceras
• †Reedops
• †Remopleurides
• †Reteocrinus
• †Rhopalia
• †Rhynchonkos
  • †Rhynchonkos stovalli – type locality for species
• Rogerella
• †Sagenodus
• †Sandia
• †Scytalocrinus
• 

  Fossilized skeleton of the Permian primitive four-limbed animal Seymouria
  †Seymouria
  • †Seymouria baylorensis
• †Sigillaria
• †Sillerpeton – type locality for genus
• †Skenidioides
• Solecurtus
• Solemya – report made of unidentified related form or using admittedly obsolete nomenclature
• †Solenochilus
• †Solenomorpha – tentative report
• †Sowerbyella
• †Sphaerexochus
• †Sphaerocoryphe
• 

  Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum
  †Sphenophyllum
  • †Sphenophyllum emarginatum
  • †Sphenophyllum gilmorei
  • †Sphenophyllum latifolium – or unidentified comparable form
  • †Sphenophyllum stoukenbergi – tentative report
• †Sphenopteris
• †Spirifer
  • †Spirifer grimesi
  • †Spirifer opimus
• Spirorbis
• †Streptognathodus
• †Stroboceras
• 

  Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
  †Strophomena
  • †Strophomena costellata
  • †Strophomena neglecta
  • †Strophomena perconcava – or unidentified comparable form
  • †Strophomena planumbona
• †Tainoceras
• †Tarphyceras
• †Tentaculites
• †Tersomius
  • †Tersomius texensis – or unidentified comparable form
• †Tetrataxis
• Textularia
• †Thoracoceras
• †Thrausmosaurus – type locality for genus
• †Trimerorhachis
  • †Trimerorhachis insignis
• †Urasterella
• †Varanodon – type locality for genus
  • †Varanodon agilis – type locality for species
• 

  Life restoration of the Permian synapsid (mammal precursor) Varanops
  †Varanops
  • †Varanops brevirostris – or unidentified comparable form
• †Vinella
• †Walchia
• †Watongia – type locality for genus
  • †Watongia meieri – type locality for species
• †Wilkingia
• †Worthenia
• †Wurmiella
  • †Wurmiella excavata
• †Xenacanthus
• Yoldia
• †Zatrachys

Mesozoic

• 

  Life restoration of the Early Cretaceous theropod dinosaur Acrocanthosaurus
  †Acrocanthosaurus – type locality for genus
  • †Acrocanthosaurus atokensis – type locality for species
• †Albanerpeton
  • †Albanerpeton arthridion
• †Allosaurus – type locality for genus
  • †Allosaurus fragilis – type locality for species
• Ammobaculites
  • †Ammobaculites subgoodlandensis – type locality for species
• †Apatosaurus
• †Arcellites
  • †Arcellites hexapartitus – or unidentified comparable form
• †Astroconodon
  • †Astroconodon denisoni – or unidentified comparable form
• †Astrodon
• †Atokasaurus – type locality for genus
  • †Atokasaurus metarsiodon – type locality for species
• †Atokatheridium – type locality for genus
  • †Atokatheridium boreni – type locality for species
• †Barosaurus
• †Bernissartia
• †Brachiosaurus
• 

  Mounted fossilized skeleton of the Late Jurassic long-necked dinosaur Brontosaurus
  †Brontosaurus
  • †Brontosaurus parvus
• †Camarasaurus
• †Camptosaurus
  • †Camptosaurus dispar
• †Caririchnium
  • †Caririchnium leonaridii
• †Ceratodus
• †Ceratosaurus – tentative report
• Cythere
  • †Cythere concentrica
• †Cythereis
  • †Cythereis carpenterae
  • †Cythereis mahonae
  • †Cythereis subgoodlandensis – type locality for species
• Cytherella
  • †Cytherella ovata
• Cytherelloidea
  • †Cytherelloidea rhomboidalis – type locality for species
  • †Cytherelloidea subgoodlandensis – type locality for species
• Cytheridea
  • †Cytheridea amygdaloides
  • †Cytheridea oliverensis
  • †Cytheridea rotundus – or unidentified comparable form
• Cytheropteron
  • †Cytheropteron howelli
  • †Cytheropteron trinitiensis
• 

  Life restoration of the Early Cretaceous dromaeosaur ("raptor") Deinonychus
  †Deinonychus
  • †Deinonychus antirrhopus
• †Diplodocus
• †Escharoides – tentative report
  • †Escharoides nomas – type locality for species
• †Exogyra
  • †Exogyra ponderosa
  • †Exogyra texana
• †Glyptops
• 

  Restoration of the Late Jurassic-Early Cretaceous crocodile relative Goniopholis
  †Goniopholis
  • †Goniopholis stovalli – type locality for species
• †Grallator
• †Gyronchus
  • †Gyronchus dumblei
• †Holoclemensia
  • †Holoclemensia texana
• †Hybodus
  • †Hybodus butleri
• †Kermackia
  • †Kermackia texana
• 

  Fossilized skeleton of the Late Triassic amphibian Koskinonodon
  †Koskinonodon
• Lituotuba
• †Lonchidion
  • †Lonchidion anitae
• †Magnoavipes
• †Megalosauripus
• †Naomichelys
• †Oklatheridium – type locality for genus
  • †Oklatheridium minax – type locality for species
  • †Oklatheridium szalayi – type locality for species
• Ostrea
  • †Ostrea crenulimargo
• 

  Fossilized skeleton of the Early Cretaceous-Eocene bony fish Palaeobalistum
  †Palaeobalistum – tentative report
• †Pappotherium
  • †Pappotherium pattersoni
• †Paracimexomys – tentative report
  • †Paracimexomys crossi – type locality for species
• Paracypris
  • †Paracypris siliqua
• Patellina
  • †Patellina subcretacea
• Planulina
• †Pleurocoelus
• †Pteraichnus
• †Ptilotodon – type locality for genus
  • †Ptilotodon wilsoni – type locality for species
• Pyripora
• Ramphonotus
  • †Ramphonotus pedunculatus
• Ramulina
• Reophax
  • †Reophax subgoodlandensis – type locality for species
• †Saurophaganax – type locality for genus
  • †Saurophaganax maximus – type locality for species
• †Sauroposeidon – type locality for genus
  • †Sauroposeidon proteles – type locality for species
• †Stegosaurus
• †Tenontosaurus
• Textularia
  • †Textularia conica
• Vaginulina
  • †Vaginulina intumescens

Cenozoic

• †Adelphailurus
• †Aelurodon
  • †Aelurodon taxoides – or unidentified comparable form
• †Aepycamelus
  • †Aepycamelus robustus
• †Agriotherium
  • †Agriotherium schneideri
• †Alforjas
  • †Alforjas taylori
• Alligator
• 

  Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932).
  †Amebelodon
• †Amphimachairodus
  • †Amphimachairodus coloradensis
• †Aphelops
  • †Aphelops malacorhinus
• †Arctonasua
  • †Arctonasua fricki – type locality for species
• †Astrohippus
  • †Astrohippus ansae
• †Barbourofelis
  • †Barbourofelis loveorum
• Bison
  • †Bison antiquus
  • 

    Mounted fossilized skeleton of the Pleistocene Bison latifrons, or long-horned bison
    †Bison latifrons – or unidentified comparable form
• Blarina
  • †Blarina brevicauda
• †Bootherium
  • †Bootherium bombifrons
• †Borophagus
  • †Borophagus secundus
• †Buisnictis
  • †Buisnictis schoffi – type locality for species
• †Calippus
  • †Calippus martini – type locality for species
  • †Calippus regulus
• 

  Life restoration of the Pliocene-Holocene camel Camelops
  †Camelops
• Canis
  • †Canis ferox
  • †Canis latrans
• †Carpocyon
  • †Carpocyon limosus
• †Castoroides
  • †Castoroides ohioensis – or unidentified comparable form
• Chaetodipus
  • †Chaetodipus hispidus – or unidentified comparable form
• Coluber
  • †Coluber constrictor
• †Copemys
  • †Copemys mariae – type locality for species
  • †Copemys shotwelli
• †Cormohipparion
  • †Cormohipparion occidentale
• Crotalus
  • †Crotalus viridis – or unidentified comparable form
• 

  Life restoration of the Pliocene-Holocene elephant relative Cuvieronius
  †Cuvieronius
  • †Cuvieronius priestleyi
• Cynomys
  • †Cynomys ludovicianus
• Dasypus
  • †Dasypus bellus
• †Desmathyus
  • †Desmathyus brachydontus
• †Dinohippus
  • †Dinohippus leidyanus
• †Dipoides
  • †Dipoides stovalli
• †Domninoides
  • †Domninoides hessei – type locality for species
  • †Domninoides knoxjonesi – type locality for species
• Elaphe
  • †Elaphe buisi – type locality for species
  • 

    A living Pantherophis obsoletus, or black rat snake
    †Elaphe obsoleta – or unidentified comparable form
  • †Elaphe vulpina
• †Epicyon
  • †Epicyon haydeni
  • †Epicyon saevus
• Equus
  • †Equus excelsus
  • †Equus francisci
  • †Equus giganteus
  • †Equus niobrarensis
  • †Equus scotti
• 

  Life restoration of the Pleistocene bovid Euceratherium, or the shrub ox. Robert Bruce Horsfall (1913).
  †Euceratherium
  • †Euceratherium collinum – type locality for species
• †Eucyon
  • †Eucyon davisi
• Felis
  • †Felis rexroadensis
• Geochelone
• Geomys
  • †Geomys bursarius
• †Gigantocamelus
  • †Gigantocamelus spatulus
• 

  Mounted fossilized skeleton of the Pleistocene armadillo relative Glyptotherium
  †Glyptotherium
  • †Glyptotherium arizonae
• †Gomphotherium
  • †Gomphotherium obscurum
• Gopherus
• †Hemiauchenia
  • †Hemiauchenia macrocephala
• †Hesperoscalops
• †Hesperotestudo
  • †Hesperotestudo riggsi
• Heterodon
  • †Heterodon nasicus
  • †Heterodon platyrhinos
  • †Heterodon plionasicus
• †Hipparion
  • †Hipparion tehonense
• †Hippotherium
• 

  Restoration of Pliocene-Pleistocene Homotherium, or scimitar cat
  †Homotherium – type locality for genus
  • †Homotherium serum – type locality for species
• †Hypolagus
  • †Hypolagus vetus
• Lampropeltis
  • †Lampropeltis doliata
  • †Lampropeltis getulus
  • †Lampropeltis triangulum
• Lasionycteris
  • †Lasionycteris noctivagans
• †Leptodontomys
• Lepus
• Lophodytes
  • †Lophodytes cucullatus
• Lynx
  • †Lynx proterolyncis
• †Macrognathomys
  • †Macrognathomys gemmacolis
• †Mammut
• †Mammuthus
  • 

    Life restoration of a herd of Mammuthus columbi, or Columbian mammoths. The extent of the fur depicted is hypothetical. Charles R. Knight (1909).
    †Mammuthus columbi
  • †Mammuthus hayi
• Marmota
• †Megalonyx
  • †Megalonyx jeffersonii
• †Megatylopus
  • †Megatylopus matthewi
• †Merychippus
  • †Merychippus coloradense – or unidentified comparable form
• †Merychyus
  • †Merychyus novomexicanus
• Microtus
  • †Microtus ochrogaster – or unidentified comparable form
  • †Microtus pennsylvanicus
• †Miospermophilus
  • †Miospermophilus lavertyi – type locality for species
• †Mylohyus
  • †Mylohyus fossilis
• Myotis
  • †Myotis yumanensis – or unidentified comparable form
• 

  Partial fossilized mandible of the Miocene-Pliocene horse Nannippus
  †Nannippus
  • †Nannippus aztecus
  • †Nannippus lenticularis
• †Neohipparion
  • †Neohipparion eurystyle
  • †Neohipparion gidleyi
  • †Neohipparion leptode
• Neotoma
• Nerodia
• †Nimravides
  • †Nimravides thinobates – or unidentified comparable form
• †Nothodipoides
  • †Nothodipoides planus – type locality for species
• 

  Life restoration of the Pleistocene ground sloth Nothrotheriops
  †Nothrotheriops
  • †Nothrotheriops texanus
• Odocoileus
• †Oklahomalagus
  • †Oklahomalagus whisenhunti – type locality for species
• Ondatra
  • †Ondatra zibethicus
• Onychomys
  • †Onychomys leucogaster – or unidentified comparable form
• Ophisaurus
  • †Ophisaurus attenuatus
• 

  Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
  †Paramylodon
  • †Paramylodon harlani
• †Paranasua
• †Pediomeryx
  • †Pediomeryx hemphillensis
• Perognathus
  • †Perognathus mclaughlini – or unidentified comparable form
• Peromyscus
  • †Peromyscus berendsensis – type locality for species
  • †Peromyscus cochrani – or unidentified comparable form
• Pipistrellus
  • †Pipistrellus subflavus
• Pituophis
  • †Pituophis catenifer
  • †Pituophis melanoleucus
• 

  Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).
  †Platygonus
  • †Platygonus vetus – or unidentified comparable form
• †Pleiolama
  • †Pleiolama vera
• †Plesiogulo
  • †Plesiogulo marshalli
• †Pliogeomys
  • †Pliogeomys buisi – type locality for species
• †Pliohippus
  • †Pliohippus nobilis
  • †Pliohippus pernix
• †Pliotaxidea
  • †Pliotaxidea nevadensis – or unidentified comparable form
• Podomys
  • †Podomys oklahomensis
• †Procamelus
  • †Procamelus grandis – or unidentified comparable form
• †Prodipodomys
• †Pronotolagus
  • †Pronotolagus apachensis
• Pseudacris
  • †Pseudacris triseriata
• Pseudemys
  • †Pseudemys hilli – type locality for species
• †Pseudhipparion
  • †Pseudhipparion gratum
  • †Pseudhipparion simpsoni
  • †Pseudhipparion skinneri
• Reithrodontomys
• †Serbelodon – or unidentified comparable form
• 

  Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
  †Smilodon
  • †Smilodon fatalis
• Sorex
  • †Sorex arcticus
  • †Sorex cinereus
  • †Sorex palustris
• Spermophilus
  • †Spermophilus dotti
  • †Spermophilus franklinii
  • †Spermophilus rexroadensis
  • †Spermophilus richardsonii – or unidentified comparable form
  • †Spermophilus tridecemlineatus
• 

  Fossilized skeleton of the Miocene weasel Sthenictis
  Sthenictis
• Sylvilagus
• Synaptomys
  • †Synaptomys bunkeri
• Tamias
  • †Tamias striatus
• Tapirus
  • †Tapirus haysii
  • †Tapirus veroensis
• 

  Restoration of the Miocene-Pliocene rhinoceros Teleoceras
  †Teleoceras
  • †Teleoceras fossiger
  • †Teleoceras guymonense – type locality for species
  • †Teleoceras hicksi
• Terrapene
  • †Terrapene parornata – type locality for species
• †Texoceros
  • †Texoceros guymonensis – type locality for species
  • †Texoceros minorei – type locality for species
• Thamnophis
  • †Thamnophis radix
• Thomomys
  • †Thomomys talpoides
• †Tregosorex
  • †Tregosorex holmani
• †Untermannerix
  • †Untermannerix copiosus
• Vulpes
  • †Vulpes stenognathus – type locality for species
  • 

    A living Vulpes velox, or swift fox
    †Vulpes velox
• †Yumaceras
  • †Yumaceras figginsi – or unidentified comparable form
• Zapus