# List of the Cenozoic life of Kansas

This list of the Cenozoic life of Kansas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Kansas and are between 66 million and 10,000 years of age.

## A

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* Acris
** †Acris crepitans
* †Adelphailurus
** †Adelphailurus kansensis – type locality for species
* Fossilized skull of the Miocene bone-crushing dog Aelurodon †Aelurodon
** †Aelurodon taxoides
* Agkistrodon
** †Agkistrodon contortix
* †Agriocharis
** †Agriocharis progenes – type locality for species
* †Agriotherium
* †Alforjas
** †Alforjas taylori
* †Alilepus
** †Alilepus hibbardi
* †Allogona
** †Allogona profunda
* †Allophaiomys
** †Allophaiomys pliocaenicus
* †Ambystoma
** †Ambystoma maculatum
** †Ambystoma tigrinum
* Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932). †Amebelodon
** †Amebelodon britti
* Amia
** †Amia calva
* †Amphimachairodus
** †Amphimachairodus coloradensis
* Anas
** †Anas crecca
* †Anchiblarinella
** †Anchiblarinella wakeeneyensis – type locality for species
* †Aphelops
** †Aphelops malacorhinus
** †Aphelops mutilus
* Aplodinotus
** †Aplodinotus grunniens – or unidentified comparable form
* †Arctodus
** †Arctodus pristinus – or unidentified comparable form
** †Arctodus simus
* †Astrohippus
** †Astrohippus ansae

## B

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* Baiomys
** †Baiomys kolbi – type locality for species
** †Baiomys rexroadi – type locality for species
* Fossilized skull of the Miocene-Pliocene false saber-toothed cat Barbourofelis †Barbourofelis
* Bassariscus
** †Bassariscus casei – type locality for species
** †Bassariscus ogallalae
* †Bensonomys
** †Bensonomys eliasi
** †Bensonomys meadensis – type locality for species
** †Bensonomys stirtoni
* †Berriochloa
** †Berriochloa amphoralis
** †Berriochloa maxima
** †Berriochloa minuta
** †Berriochloa pumila
** †Berriochloa tuberculata
** †Berriochloa variegata
* †Biorbia
** †Biorbia fossilia
* Bison
** †Bison antiquus – type locality for species
** †Bison bison
** Mounted fossilized skeleton of the Pleistocene Bison latifrons, also known as the giant bison or long-horned bison †Bison latifrons
* Blarina
** †Blarina brevicauda
** †Blarina carolinensis
* †Borophagus
** †Borophagus diversidens
** †Borophagus hilli
** †Borophagus pugnator
** †Borophagus secundus – type locality for species
* Botaurus
** †Botaurus hibbardi – type locality for species
* †Brachyopsigale
** †Brachyopsigale dubius – type locality for species
* Bufo
** A living Anaxyrus cognatus (formerly Bufo cognatus), or Great Plains toad †Bufo cognatus
** †Bufo hemiophrys
** †Bufo hibbardi
** †Bufo marinus
** †Bufo pliocompactilis – type locality for species
** †Bufo valentinensis
** †Bufo woodhousei
* †Buisnictis
** †Buisnictis breviramus – type locality for species
** †Buisnictis schoffi

## C

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* †Calippus
** †Calippus large informal
** †Calippus martini
** †Calippus regulus
* Life restoration of the Pliocene-Holocene camel Camelops †Camelops
* Candona
** †Candona lactea – or unidentified comparable form
** †Candona nyensis
** †Candona truncata
* Canis
** †Canis armbrusteri
** †Canis dirus
** †Canis edwardii
** †Canis ferox
** †Canis latrans
** †Canis lepophagus
* Fossilized skeleton of the Pleistocene dwarf pronghorn Capromeryx †Capromeryx
** †Capromeryx furcifer
* †Carpocyon
** †Carpocyon compressus
* Carychium
** †Carychium exiguum
* Castor
** †Castor canadensis
* †Castoroides
** †Castoroides ohioensis – or unidentified comparable form
* †Catostomus
** †Catostomus commersoni
* Celtis
** †Celtis willistonii
* Life restoration of the Miocene-Pleistocene horned gopher Ceratogaulus. Robert Bruce Horsfall (1913). †Ceratogaulus
** †Ceratogaulus hatcheri
** †Ceratogaulus minor
* †Cervalces
** †Cervalces scotti
* Cervus
** †Cervus elaphus
* Chaetodipus
** †Chaetodipus hispidus
* Chara
** †Chara globularis – or unidentified comparable form
* Fossilized cranium of the Pliocene-Pleistocene hyena Chasmaporthetes †Chasmaporthetes
* Chelydra
** †Chelydra serpentina
* Chrysemys
** †Chrysemys picta
** †Chrysemys scripta
* †Cionella
** †Cionella lubrica
* Clethrionomys
** †Clethrionomys gapperi
* Cnemidophorus
** †Cnemidophorus bilobatus
** †Cnemidophorus sexlineatus
* Coluber
** †Coluber constrictor
* †Copemys – type locality for genus
** †Copemys pisinnus
** †Copemys shotwelli – type locality for species
* Fossilized skull of the Miocene pronghorn Cosoryx †Cosoryx
** †Cosoryx furcatus
* Crotalus
** †Crotalus viridis
* †Cryptantha
** †Cryptantha auriculata
* Cryptotis
** †Cryptotis adamsi
** †Cryptotis kansasensis – type locality for species
** †Cryptotis meadensis – type locality for species
** †Cryptotis parva
* Cynomys
** †Cynomys gunnisoni – or unidentified comparable form
** †Cynomys hibbardi – type locality for species
** A living Cynomys ludovicianus, or black-tailed prairie dog †Cynomys ludovicianus
** †Cynomys niobrarius
** †Cynomys spenceri
** †Cynomys vetus – type locality for species
* Cyprideis
** †Cyprideis littoralis
* Cyprinotus – tentative report

## D

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* Deroceras
** †Deroceras aenigma
* Diadophis
** †Diadophis punctatus
* Mounted fossilized skeleton of the Miocene-Pliocene horse Dinohippus †Dinohippus
** †Dinohippus interpolatus
** †Dinohippus leidyanus
* Dipodomys
** †Dipodomys hibbardi – type locality for species
** †Dipodomys ordii – or unidentified comparable form
* †Dipoides
** †Dipoides rexroadensis – type locality for species
** †Dipoides wilsoni – type locality for species
* Discus
** †Discus cronkhitei
* †Domninoides
** †Domninoides mimicus – type locality for species

## E

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* Egretta
* Elaphe – type locality for genus
** †Elaphe kansensis – type locality for species
** †Elaphe obsoleta
** †Elaphe vulpina
* Emydoidea
** †Emydoidea twentei
* Mounted fossilized skeleton of the Miocene bone-crushing dog Epicyon †Epicyon
** †Epicyon aelurodontoides – type locality for species
** †Epicyon haydeni
** †Epicyon saevus
* Equus
** †Equus conversidens
** †Equus francisci
** †Equus giganteus – or unidentified comparable form
** †Equus niobrarensis
** †Equus scotti
** Fossilized skeleton of the Pliocene-Pleistocene horse Equus simplicidens, also known as the Hagerman horse or American zebra †Equus simplicidens
* †Eucastor
* †Euconulus
** †Euconulus fulvus
* †Eucyon
** †Eucyon davisi
* Eumeces
** †Eumeces fasciatus
** †Eumeces hixsonorum – type locality for species
** †Eumeces obsoletus
** †Eumeces septentrionalis
** †Eumeces striatulus
* †Eumecoides
** †Eumecoides hibbardi
** †Eumecoides mylocoelus

## F

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* Felis
** †Felis rexroadensis
* †Ferissia
** †Ferissia fragilis – or unidentified comparable form
* Ferrissia
** †Ferrissia rivularis
* A living Fundulus †Fundulus

## G

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* Gastrocopta
** †Gastrocopta armifera
** †Gastrocopta cristata
** †Gastrocopta tappaniana
* Geochelone
* Geomys
** †Geomys adamsi – type locality for species
** A living Geomys bursarius, or Plains pocket gopher †Geomys bursarius
** †Geomys jacobi – type locality for species
** †Geomys minor
** †Geomys quinni
** †Geomys tobinensis
* Gerrhonotus
** †Gerrhonotus mungerorum – type locality for species
* †Gigantocamelus
** †Gigantocamelus spatulus
* †Gnathabelodon
** †Gnathabelodon thorpei – type locality for species
* Mounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium †Gomphotherium
* Gopherus
* Graptemys
** †Graptemys geographica
* Grus
** †Grus americana
** †Grus nannodes – type locality for species
* †Guildayomys
** †Guildayomys hibbardi
* Gyraulus
** †Gyraulus parvus

## H

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* Hawaiia
** †Hawaiia miniscula
** †Hawaiia minuscula
* Helicodiscus
** †Helicodiscus paralellus
** †Helicodiscus parallelus
* Helisoma
** †Helisoma anceps
** †Helisoma lentum
** †Helisoma trivolvis
* Fossilized lower jaw of the Miocene-Pleistocene llama relative Hemiauchenia †Hemiauchenia
** †Hemiauchenia macrocephala
* †Hesperoscalops
** †Hesperoscalops rexroadi – type locality for species
** †Hesperoscalops sewardensis – type locality for species
* †Hesperotestudo
** †Hesperotestudo orthopygia
** †Hesperotestudo riggsi
* Heterodon
** †Heterodon nasicus
** †Heterodon platyrhinos
** †Heterodon plionasicus
* †Hibbardomys
** †Hibbardomys fayae – type locality for species
** †Hibbardomys marthae
** †Hibbardomys voorhiesi
* †Hipparion
** †Hipparion tehonense – or unidentified comparable form
* †Hippotherium
* Holbrookia
** †Holbrookia maculata
* Life restoration of the Pleistocene armadillo relative Holmesina with a human to scale †Holmesina
** †Holmesina septentrionalis
* Homo
** †Homo sapiens
* †Homotherium
** †Homotherium serum
* Hyla
** †Hyla cinerea – or unidentified comparable form
** †Hyla gratiosa – or unidentified comparable form
** †Hyla squirella – or unidentified comparable form
** †Hyla versicolor
* Life restoration of the Miocene horse Hypohippus. Heinrich Harder (1920). †Hypohippus
* †Hypolagus
** †Hypolagus regalis – type locality for species
** †Hypolagus ringoldensis
** †Hypolagus vetus
** †Hypolagus voorhiesi
* †Hystricops

## I

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* Ictalurus
** †Ictalurus lambda
** †Ictalurus melas
** †Ictalurus punctatus
* Illustration of a living Ictiobus, or buffalo fish †Ictiobus
* Ilyocypris
** †Ilyocypris bradyi
* †Ischyrocyon – tentative report

## K

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* †Kansasimys
** †Kansasimys dubius
* Kinosternon
** A living Kinosternon flavescens, or yellow mud turtle †Kinosternon flavescens
** †Kinosternon subrubrum

## L

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* A living Lampropeltis getula, or eastern kingsnake Lampropeltis
** †Lampropeltis calligaster
** †Lampropeltis doliata
** †Lampropeltis getulus
** †Lampropeltis similis
* Lasiurus
** †Lasiurus cinereus
** †Lasiurus fossilis – type locality for species
** †Lasiurus golliheri – type locality for species
* Lepisosteus
** †Lepisosteus osseus
** Illustration of a living Lepisosteus platostomus, or shortnose gar †Lepisosteus platostomus – tentative report
* Lepomis
** †Lepomis cyanellus
** †Lepomis humilis – or unidentified comparable form
* †Leptarctus
** †Leptarctus mummorum – type locality for species
** †Leptarctus woodburnei – type locality for species
** †Leptarctus wortmani – type locality for species
* Illustration of a fossilized skull of the Oligocene-Miocene dog Leptocyon †Leptocyon
** †Leptocyon vafer
* Lepus
** †Lepus californicus – or unidentified comparable form
* †Longirostromeryx
* Lontra
** †Lontra canadensis
* Lymnaea
** †Lymnaea caperota
** †Lymnaea humulus
** †Lymnaea parva
* Lynx

## M

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* †Machairodus
** †Machairodus catocopis
* Macrochelys
** †Macrochelys temminckii
* †Macrognathomys
* †Mammut
** †Mammut americanum
* †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
* Martes
** †Martes foxi – type locality for species
** †Martes stirtoni – type locality for species
* †Martinogale
** †Martinogale alveodens
* †Megalonyx
** †Megalonyx jeffersonii
** †Megalonyx leptostomus
* †Megantereon
** †Megantereon hesperus
* †Megatylopus
** †Megatylopus cochrani
** †Megatylopus gigas
** †Megatylopus matthewi
* †Menetus
** †Menetus exacuous
* Mephitis
** †Mephitis mephitis – tentative report
** †Mephitis rexroadensis – type locality for species
* †Merychyus
** †Merychyus novomexicanus
* Micropterus
** †Micropterus punctulatus – or unidentified comparable form
* Microtus
** †Microtus llanensis
** †Microtus meadensis
** †Microtus ochrogaster
** †Microtus paroperarius – type locality for species
** †Microtus pennsylvanicus
* Mictomys
** †Mictomys borealis
** †Mictomys kansasensis
** †Mictomys meltoni
** †Mictomys vetus
* †Minytrema – tentative report
* †Mionictis
* Musculium
** †Musculium partineium
** †Musculium transversum
* Mustela
** †Mustela meltoni – type locality for species
** †Mustela rexroadensis – type locality for species
** †Mustela richardsonii – or unidentified comparable form
* †Mylagaulus
** †Mylagaulus sesquipedalis – type locality for species
* Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus †Mylohyus
** †Mylohyus fossilis
* Myotis

## N

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* Partial fossilized mandible of the Miocene-Pliocene horse Nannippus †Nannippus
** †Nannippus lenticularis
** †Nannippus peninsulatus
* †Nassella
** †Nassella pohlii
** †Nassella reynoldsii
* †Nebraskomys
** †Nebraskomys mcgrewi
** †Nebraskomys rexroadensis
* †Nekrolagus
** †Nekrolagus progressus – type locality for species
* Neofiber
** †Neofiber leonardi – type locality for species
* Neogale
** †Neogale frenata – or unidentified comparable form
** †Neogale vison
* Life restoration of a herd of Neohipparion. Robert Bruce Horsfall (1913). †Neohipparion
** †Neohipparion affine – or unidentified comparable form
** †Neohipparion eurystyle
** †Neohipparion leptode
** †Neohipparion trampasense
* Neotoma
** †Neotoma floridana – or unidentified comparable form
** †Neotoma leucopetrica
** †Neotoma micropus
** †Neotoma quadriplicata – type locality for species
** †Neotoma sawrockensis – type locality for species
** †Neotoma taylori – type locality for species
* Nerodia
** †Nerodia hillmani
** †Nerodia sipedon
* †Nerterogeomys
** †Nerterogeomys smithi
* Nesovitrea
** †Nesovitrea electrina
* Nettion
** †Nettion ogallalae – type locality for species
* †Nimravides
** †Nimravides thinobates
* Life restoration of the Pleistocene ground sloth Nothrotheriops †Nothrotheriops
** †Nothrotheriops texanus
* Notiosorex
** †Notiosorex crawfordi
** †Notiosorex jacksoni – type locality for species
* †Notolagus
** †Notolagus lepusculus – type locality for species
* †Notropes
* †Notropis – tentative report

## O

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* A living Odocoileus deer Odocoileus
* Ogmodontomys
** †Ogmodontomys poaphagus – type locality for species
** †Ogmodontomys sawrockensis – type locality for species
* †Ogmophis
** †Ogmophis pliocompactus – type locality for species
* Ondatra
** †Ondatra annectens
** †Ondatra idahoensis
** †Ondatra meadensis
** †Ondatra zibethicus
* Onychomys
** †Onychomys gidleyi – type locality for species
** †Onychomys hollisteri – type locality for species
** †Onychomys leucogaster – or unidentified comparable form
** †Onychomys martini
** †Onychomys pedroensis
* Ophisaurus
** †Ophisaurus attenuatus
* A living Ortalis, or chachalaca Ortalis
** †Ortalis affinis – type locality for species
* Oryzomys
** †Oryzomys palustris

## P

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* †Paenemarmota
** †Paenemarmota barbouri
** †Paenemarmota sawrockensis
* †Paleoheterodon
* †Panicum
** †Panicum elegans
* Panthera
** †Panthera leo
* †Paracryptotis
** †Paracryptotis rex – type locality for species
* Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon †Paramylodon
** †Paramylodon harlani
* †Paranasua – or unidentified comparable form
* †Parapliosaccomys
** †Parapliosaccomys hibbardi
* †Pediomeryx
** †Pediomeryx hemphillensis
* †Peraceras
* Perca
** †Perca flavescens
* A living Perognathus pocket mouse Perognathus
** †Perognathus coquorum – or unidentified comparable form
** †Perognathus dunklei – type locality for species
** †Perognathus gidleyi
** †Perognathus mclaughlini – type locality for species
** †Perognathus pearlettensis – type locality for species
** †Perognathus rexroadensis – type locality for species
* Peromyscus
** †Peromyscus baumgartneri – type locality for species
** †Peromyscus berendsensis
** †Peromyscus cochrani – type locality for species
** †Peromyscus cragini
** †Peromyscus kansasensis – type locality for species
** †Peromyscus progressus – type locality for species
* †Petenyia
** †Petenyia concisa
* Phenacomys
** †Phenacomys intermedius – or unidentified comparable form
* Phrynosoma
** A living Phrynosoma cornutum, or Texas horned lizard †Phrynosoma cornutum
* Physa
** †Physa anatina
** †Physa arboreus
** †Physa gyrina
** †Physa hawni
* Pisidium
** †Pisidium abditum
** †Pisidium compressum
** †Pisidium noveboracense
* Pituophis
** †Pituophis catenifer
** †Pituophis melanoleucus
* †Planisorex
** †Planisorex dixonensis
* †Planorbula
** †Planorbula campestris
* Mounted fossilized skeleton of the Miocene elephant relative Platybelodon †Platybelodon
** †Platybelodon loomisi
* †Platygonus
** †Platygonus bicalcaratus
** †Platygonus compressus – or unidentified comparable form
** †Platygonus pollenae
** †Platygonus vetus – or unidentified comparable form
* Plegadis – or unidentified comparable form
* †Pleiolama
** †Pleiolama vera – type locality for species
* †Plesiogulo
** †Plesiogulo marshalli – type locality for species
* †Plioctomys
** †Plioctomys rinkeri
* †Pliogyps – type locality for genus
** †Pliogyps fisheri – type locality for species
* Fossilized skull of the Miocene horse Pliohippus †Pliohippus
** †Pliohippus nobilis – type locality for species
** †Pliohippus pernix
* †Pliolemmus
** †Pliolemmus antiquus – type locality for species
* †Pliophenacomys
** †Pliophenacomys dixonensis – type locality for species
** †Pliophenacomys finneyi
** †Pliophenacomys meadensis
** †Pliophenacomys osborni
** †Pliophenacomys primaevus – type locality for species
* †Pliopicus – type locality for genus
** †Pliopicus brodkorbi – type locality for species
* †Pliotaxidea
** †Pliotaxidea nevadensis
* †Pomoxis
* †Potamocypris
* †Pratifelis
** †Pratifelis martini – type locality for species
* †Pratilepus
** †Pratilepus kansasensis – type locality for species
* †Procamelus
* †Procastoroides
** †Procastoroides sweeti
* Procyon
** †Procyon lotor
** †Procyon rexroadensis – type locality for species
* †Prodipodomys
** †Prodipodomys centralis
** †Prodipodomys griggsorum
** †Prodipodomys kansensis
** †Prodipodomys tiheni
* †Prodipoides
** †Prodipoides phillisi – type locality for species
* †Prolappula
** †Prolappula verrucosa
* †Prolithospermum
** †Prolithospermum johnstonii
* †Prosthennops
** †Prosthennops serus – type locality for species
* Fossilized skeleton of the Miocene horse Protohippus †Protohippus
** †Protohippus gidleyi
** †Protohippus supremus
* †Protolabis
* Pseudacris
** †Pseudacris clarki – or unidentified comparable form
** †Pseudacris triseriata
* Pseudemys
** †Pseudemys hibbardi
* †Pseudhipparion
* †Pseudoceras
** †Pseudoceras skinneri
* Puma
** †Puma concolor
* Pupilla
** †Pupilla sinistra
* Pupoides
** †Pupoides marginatus

## R

* A
* B
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* Life restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx. Robert Bruce Horsfall (1913). †Ramoceros
** †Ramoceros osborni
* †Rana
** †Rana areolata – or unidentified comparable form
** †Rana bucella
** †Rana catesbeiana
** †Rana fayeae
** †Rana parvissima
** †Rana pipiens
** †Rana rexroadensis
* †Regina
** †Regina grahami
* Reithrodontomys
** †Reithrodontomys humulis
** †Reithrodontomys megalotis
** †Reithrodontomys montanus – or unidentified comparable form
** †Reithrodontomys moorei
** †Reithrodontomys pratincola – type locality for species
** †Reithrodontomys rexroadensis – type locality for species
** †Reithrodontomys wetmorei – type locality for species
* Rhinocheilus – tentative report
** †Rhinocheilus lecontei
* Restoration of the Miocene-Pliocene elephant relative Rhynchotherium †Rhynchotherium

## S

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* †Satherium
** †Satherium piscinarium
* Scalopus
** †Scalopus aquaticus
* A living Scaphiopus, or North American spadefoot toad Scaphiopus
** †Scaphiopus hardeni
* Sceloporus
** †Sceloporus robustus – type locality for species
** †Sceloporus undulatus
* †Semotilus
** †Semotilus atromaculatus – or unidentified comparable form
* Sigmodon
** †Sigmodon curtisi – or unidentified comparable form
** †Sigmodon minor
* Sistrurus
** †Sistrurus catenatus
* Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon †Smilodon
* †Soergelia
** †Soergelia mayfieldi – or unidentified comparable form
* Sorex
** †Sorex arcticus
** †Sorex cinereus
** †Sorex cudahyensis
** †Sorex kansasensis – type locality for species
** †Sorex lacustris
** †Sorex leahyi – type locality for species
** †Sorex megapalustris
** †Sorex palustris
** †Sorex pratensis
** †Sorex rexroadensis – type locality for species
** †Sorex sandersi – type locality for species
** †Sorex scottensis – type locality for species
** †Sorex taylori – type locality for species
* Spea
** A living Spea bombifrons, or plains spadefoot toad †Spea bombifrons
** †Spea diversus
* Spermophilus
** †Spermophilus boothi
** †Spermophilus cragini – type locality for species
** †Spermophilus franklinii – or unidentified comparable form
** †Spermophilus fricki
** †Spermophilus howelli – type locality for species
** †Spermophilus lorisrusselli – type locality for species
** †Spermophilus meadensis – type locality for species
** †Spermophilus rexroadensis – type locality for species
** †Spermophilus richardsonii
** †Spermophilus tridecemlineatus
* Sphaerium
** †Sphaerium simile
* Spilogale
** †Spilogale putorius
** †Spilogale rexroadi – type locality for species
* Stagnicola
** †Stagnicola caperata
* Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon †Stegomastodon
** †Stegomastodon mirificus
** †Stegomastodon primitivus
* †Stenotrema
** †Stenotrema leai
* Sternotherus
** †Sternotherus odoratus
* Storeria
** †Storeria dekayi – or unidentified comparable form
* Succinea
** †Succinea ovalis
* †Succinia
** †Succinia concordalis
** †Succinia haydeni
* Sylvilagus
** A living Sylvilagus floridanus, or eastern cottontail †Sylvilagus floridanus
* †Symmetrodontomys
** †Symmetrodontomys simplicidens – type locality for species
* Synaptomys
** †Synaptomys australis

## T

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* Tapirus
** †Tapirus veroensis
* Taxidea
** †Taxidea taxus
* Mounted fossilized skeleton of the Miocene-Pliocene rhinoceros Teleoceras †Teleoceras
** †Teleoceras fossiger – type locality for species
** †Teleoceras guymonense
* Terrapene
** †Terrapene carolina
** †Terrapene ilanensis
* †Texasophis
** †Texasophis wilsoni – type locality for species
* †Texoceros
** †Texoceros guymonensis – or unidentified comparable form
* Thamnophis
** †Thamnophis proximus
** A living Thamnophis radix, or plains garter snake †Thamnophis radix
** †Thamnophis saurita – or unidentified comparable form
** †Thamnophis sirtalis
* Thomomys
** †Thomomys talpoides
* Trachemys
** †Trachemys scripta
* †Tregobatrachus – type locality for genus
** †Tregobatrachus hibbardi – type locality for species
* †Tregophis – type locality for genus
** †Tregophis brevirachis – type locality for species
* †Tregosorex
** †Tregosorex holmani – type locality for species
* †Trigonictis
** †Trigonictis macrodon
* Trionyx
** †Trionyx spinifer
* Tropidoclonion
** †Tropidoclonion lineatum
* A living Tympanuchus, or prairie chicken Tympanuchus – or unidentified comparable form

## U

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* †Untermannerix
** †Untermannerix copiosus
* Urocyon
** A living Urocyon cinereoargenteus, or gray fox †Urocyon cinereoargenteus
** †Urocyon progressus
* †Ustatochoerus
** †Ustatochoerus medius

## V

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* Vallonia
** †Vallonia gracilicosta
** †Vallonia pulchella
* Valvata
** †Valvata tricarinata
* Vertigo
** †Vertigo ovata
* Vulpes
** A living Vulpes velox, or swift fox †Vulpes velox

## Z

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* Zapus
** †Zapus burti – type locality for species
** A living Zapus hudsonius, or meadow jumping mouse †Zapus hudsonius
** †Zapus rinkeri – type locality for species
** †Zapus sandersi – type locality for species
* Zonitoides
** †Zonitoides arboreus
** †Zonitoides nitidus