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

A

• Acer
  • † Acer minor
• † Achlyoscapter
• Acipenser
• † Aciprion
  • † Aciprion formosum
• Acris
  • † Acris crepitans – or unidentified comparable form

• 

  † Acritohippus
  • † Acritohippus isonesus
  • † Acritohippus tertius
• † Adeloblarina – or unidentified comparable form
• † Adjidaumo
  • † Adjidaumo intermedius – type locality for species
  • † Adjidaumo maximus – type locality for species
  • † Adjidaumo minimus
  • † Adjidaumo minutus
• † Aelurodon
  • † Aelurodon asthenostylus
  • † Aelurodon ferox
  • † Aelurodon mcgrewi – type locality for species
  • † Aelurodon stirtoni
  • † Aelurodon taxoides
  • † Aelurodon wheelerianus – or unidentified comparable form

• 

  † Aepycamelus
  • † Aepycamelus major
  • † Aepycamelus robustus
• Agkistrodon
  • † Agkistrodon contortix – or unidentified comparable form
• † Agnotocastor
  • † Agnotocastor readingi – type locality for species
• † Agriochoerus
  • † Agriochoerus antiquus
• † Agriotherium

• 

  † Aletomeryx
  • † Aletomeryx gracilis – type locality for species
  • † Aletomeryx marslandensis – type locality for species
• † Alforjas
• † Alilepus
  • † Alilepus vagus
• Alligator
  • † Alligator mcgrewi – type locality for species
  • † Alligator mefferdi – type locality for species
  • † Alligator thomsoni – type locality for species
• † Allomys
  • † Allomys harkseni
• † Allophaiomys
• † Alluvisorex
  • † Alluvisorex arcadentes – or unidentified comparable form

• 

  Alnus
• † Alphagaulus
  • † Alphagaulus tedfordi – type locality for species
  • † Alphagaulus vetus
• † Alwoodia
  • † Alwoodia magna – or unidentified comparable form
• † Ambrosia
• † Ambystoma
  • † Ambystoma maculatum
  • † Ambystoma minshalli – type locality for species
  • † Ambystoma priscum – type locality for species
  • † Ambystoma tigrinum

• 

  † Amebelodon
  • † Amebelodon fricki – type locality for species
• † Ameiseophis
  • † Ameiseophis robinsoni
• Amia
  • † Amia calva
• Ammospermophilus
  • † Ammospermophilus junturensis
• † Amphechinus
• † Amphicyon
  • † Amphicyon frendens – type locality for species
  • † Amphicyon galushai – type locality for species
  • † Amphicyon ingens

• 

  † Amphimachairodus
  • † Amphimachairodus coloradensis
• † Anchigyps
  • † Anchigyps voorhiesi
• † Anchitheriomys
  • † Anchitheriomys fluminis
  • † Anchitheriomys nanus
  • † Anchitheriomys stouti – type locality for species
• † Anchitherium

• 

  † Andrias
  • † Andrias matthewi – type locality for species
• † Anilioides
  • † Anilioides nebraskensis – type locality for species
• † Ankylodon
  • † Ankylodon annectens
• † Antecalomys
  • † Antecalomys phthanus – type locality for species
• † Antesorex
  • † Antesorex wilsoni – type locality for species
• Antrozous – or unidentified comparable form
• Apalone
  • † Apalone miocaenus – type locality for species
  • † Apalone spinifera
• † Apatemys
  • † Apatemys downsi – or unidentified related form
• † Aphelops
  • † Aphelops megalodus
  • † Aphelops mutilus – type locality for species
• † Apletotomeus
  • † Apletotomeus crassus – type locality for species
• Aplodinotus
  • † Aplodinotus grunniens
• † Apternodus
• † Aramornis
  • † Aramornis longurio – type locality for species
• Aramus
• † Archaeocyon
  • † Archaeocyon leptodus
  • † Archaeocyon pavidus
• † Archaeohippus
  • † Archaeohippus penultimus – type locality for species
• † Archaeolagus
  • † Archaeolagus primigenius – or unidentified comparable form

• 

  † Archaeotherium
  • † Archaeotherium mortoni
• † Arctodus
  • † Arctodus simus
• Arctomys
  • † Arctomys vetus
• † Arctonasua
  • † Arctonasua eurybates – type locality for species
  • † Arctonasua gracilis – type locality for species
  • † Arctonasua minima – type locality for species
• Ardea
• † Arikareeomys
  • † Arikareeomys skinneri – type locality for species
• Arizona
  • † Arizona voorhiesi – type locality for species
• † Arretotherium
  • † Arretotherium acridens
  • † Arretotherium fricki – type locality for species
• † Artemisia
• † Astrohippus
• Atractosteus
  • † Atractosteus spatula
• † Aulolithomys
  • † Aulolithomys bounites

B

• Baiomys
• Balearica

• 

  † Barbourofelis
  • † Barbourofelis fricki
  • † Barbourofelis morrisi – type locality for species
  • † Barbourofelis whitfordi – type locality for species
• † Barbouromeryx
  • † Barbouromeryx trigonocorneus
• Bassariscus
  • † Bassariscus antiquus – type locality for species
  • † Bassariscus minimus – type locality for species
  • † Bassariscus ogallalae – type locality for species
• † Bathornis
  • † Bathornis veredus
• † Bathygenys
• † Bensonomys
  • † Bensonomys meadensis
• Betula – or unidentified comparable form
• Bison

  • 

    † Bison latifrons
• † Blackia
• † Blacktops – type locality for genus
  • † Blacktops latidens – type locality for species
  • † Blacktops longinares – type locality for species
• Blarina
  • † Blarina brevicauda
• † Blastomeryx
  • † Blastomeryx gemmifer – type locality for species
• † Bootherium

  • 

    † Bootherium bombifrons – type locality for species
• † Boreortalis
  • † Boreortalis phengitis – type locality for species
• † Borophagus
  • † Borophagus diversidens
  • † Borophagus pugnator
  • † Borophagus secundus
• † Bothriodon
  • † Bothriodon americanus
• † Bouromeryx
  • † Bouromeryx americanus
  • † Bouromeryx submilleri – type locality for species

• 

  † Brachycrus
  • † Brachycrus buwaldi
  • † Brachycrus siouense – type locality for species
  • † Brachycrus wilsoni – type locality for species
• † Brachyerix
  • † Brachyerix incertis – type locality for species
  • † Brachyerix macrotis
  • † Brachyerix richi – type locality for species
• † Brachyopsigale
  • † Brachyopsigale dubius – or unidentified comparable form
• † Brachypsalis
  • † Brachypsalis hyaenoides – type locality for species
  • † Brachypsalis matutinus – type locality for species
  • † Brachypsalis modicus
  • † Brachypsalis obliquidens – type locality for species
  • † Brachypsalis pachycephalus

• 

  † Brachyrhynchocyon
  • † Brachyrhynchocyon dodgei
• † Bretzia – tentative report
• † Brontops
  • † Brontops brachycephalus
  • † Brontops dispar – type locality for species
• Bufo
  • † Bufo cognatus
  • † Bufo hibbardi
  • † Bufo holmani – type locality for species
  • † Bufo kuhrei – type locality for species
  • † Bufo pliocompactilis
  • † Bufo repentinus
  • † Bufo rexroadensis
  • † Bufo spongifrons – or unidentified comparable form
  • † Bufo valentinensis – type locality for species
• † Buisnictis
  • † Buisnictis burrowsi
  • † Buisnictis schoffi
• Burhinus
  • † Burhinus lucorum – type locality for species

• 

  Buteo
  • † Buteo conterminus – type locality for species
  • † Buteo typhoius

C

• † Calamagras
  • † Calamagras angulatus
  • † Calamagras murivorus
  • † Calamagras platyspondyla – type locality for species
• † Calippus
  • † Calippus cerasinus
  • † Calippus large informal
  • † Calippus martini
  • † Calippus placidus
  • † Calippus proplacidus
  • † Calippus regulus

• 

  † Camelops
  • † Camelops hesternus
• † Campestrallomys
  • † Campestrallomys annectens – type locality for species
  • † Campestrallomys siouxensis – type locality for species
• Canis
  • † Canis dirus
  • † Canis edwardii
  • † Canis ferox
  • † Canis latrans
  • † Canis lepophagus
• † Capacikala

• 

  † Capromeryx
  • † Capromeryx arizonensis
  • † Capromeryx furcifer
  • † Capromeryx tauntonensis
• † Carpocyon
  • † Carpocyon compressus
  • † Carpocyon limosus
  • † Carpocyon robustus
  • † Carpocyon webbi – type locality for species
• Carya
  • † Carya libbeyi
• Castor
  • † Castor californicus – or unidentified comparable form

• 

  † Castoroides
• Cedrela
  • † Cedrela trainii
• † Cedromus
  • † Cedromus savannae – type locality for species
  • † Cedromus wardi
• Celtis
  • † Celtis kansana
• † Centetodon
  • † Centetodon chadronensis
  • † Centetodon divaricatus – type locality for species
  • † Centetodon hendryi
  • † Centetodon magnus
  • † Centetodon marginalis
• † Centimanomys
  • † Centimanomys major
• † Cephalogale

• 

  † Ceratogaulus
  • † Ceratogaulus anecdotus
  • † Ceratogaulus hatcheri
  • † Ceratogaulus rhinocerus
• † Cervalces
• † Chadronia – type locality for genus
  • † Chadronia margaretae – type locality for species
• † Chadronycteris
  • † Chadronycteris rabenae – type locality for species
• Chaetodipus
  • † Chaetodipus hispidus
• † Chamaecyparis
  • † Chamaecyparis linguaefolia
• Charina
  • † Charina prebottae
• † Cheilophis
  • † Cheilophis huerfanoensis
• Chelydra
  • † Chelydra serpentina
• † Chelydrops
  • † Chelydrops stricta – type locality for species
• Chrysemys
  • † Chrysemys picta
• † Chumashius

• 

  Cladrastis
  • † Cladrastis prelutea – type locality for species
• Clethrionomys
  • † Clethrionomys gapperi – or unidentified comparable form
• Cnemidophorus
  • † Cnemidophorus sexlineatus
• Cocculus
  • † Cocculus rotunda – type locality for species
• † Colodon
  • † Colodon cingulatus
  • † Colodon occidentalis
• Coluber
  • † Coluber constrictor

• 

  † Conuropsis
  • † Conuropsis fratercula – type locality for species
• † Copedelphys
  • † Copedelphys stevensoni
• † Copemys
  • † Copemys lindsayi
  • † Copemys longidens
  • † Copemys mariae
  • † Copemys pisinnus
  • † Copemys shotwelli
• † Cordia
  • † Cordia prealba – type locality for species

• 

  † Cormocyon
  • † Cormocyon copei
  • † Cormocyon haydeni
• † Cormohipparion
  • † Cormohipparion goorisi
  • † Cormohipparion johnsoni – type locality for species
  • † Cormohipparion matthewi – type locality for species
  • † Cormohipparion merriami – type locality for species
  • † Cormohipparion occidentale
  • † Cormohipparion quinni
• † Cosoryx
  • † Cosoryx furcatus

• 

  † Cranioceras
  • † Cranioceras unicornis
• Crataegus
  • † Crataegus nupta
• † Craterogale – type locality for genus
  • † Craterogale simus – type locality for species
• Crotalus
  • † Crotalus horridus
• † Crusafontina
  • † Crusafontina magna
• Cryptotis
• † Crytonyx
  • † Crytonyx cooki – type locality for species
• † Cupidinimus
  • † Cupidinimus nebraskensis
  • † Cupidinimus prattensis – type locality for species
  • † Cupidinimus tertius – or unidentified comparable form
• † Cylindrodon
  • † Cylindrodon nebraskensis
• † Cynarctoides
  • † Cynarctoides acridens
  • † Cynarctoides emryi – type locality for species
  • † Cynarctoides roii
• † Cynarctus
  • † Cynarctus crucidens – type locality for species
  • † Cynarctus saxatilis
  • † Cynarctus voorhiesi – type locality for species

• 

  † Cynelos
  • † Cynelos idoneus
  • † Cynelos sinapius
• † Cynodesmus
  • † Cynodesmus martini – type locality for species
  • † Cynodesmus thooides
• † Cynomyoides
  • † Cynomyoides vatis – type locality for species
• Cynomys
  • † Cynomys niobrarius
  • † Cynomys sappaensis – type locality for species
  • † Cynomys spenceri – type locality for species

D

• † Dakotaophis
  • † Dakotaophis greeni
• † Daphoenictis
  • † Daphoenictis tedfordi
• † Daphoenodon
  • † Daphoenodon falkenbachi
  • † Daphoenodon niobrarensis – type locality for species
  • † Daphoenodon robustum
  • † Daphoenodon superbus

• 

  † Daphoenus – type locality for genus
  • † Daphoenus felinus
  • † Daphoenus hartshornianus
  • † Daphoenus vetus – type locality for species
• Dasypus
  • † Dasypus bellus
• † Delotrochanter
  • † Delotrochanter oryktes – type locality for species
  • † Delotrochanter petersoni
• † Desmatippus
  • † Desmatippus integer
  • † Desmatippus nebrascensis – type locality for species
  • † Desmatippus nebraskensis
  • † Desmatippus tyleri – type locality for species
• † Desmatochoerus
  • † Desmatochoerus megalodon
• † Desmatolagus
  • † Desmatolagus gazini – type locality for species
• † Desmocyon
  • † Desmocyon matthewi
  • † Desmocyon thomsoni

• 

  † Diceratherium
  • † Diceratherium annectens
  • † Diceratherium armatum
  • † Diceratherium niobrarense – type locality for species
  • † Diceratherium radtkei
• Dicrostonyx
  • † Dicrostonyx torquatus
• † Dikkomys
  • † Dikkomys matthewi – type locality for species
• † Dinictis
  • † Dinictis felina
• † Dinogale
  • † Dinogale siouxensis – type locality for species
• † Dinohippus
  • † Dinohippus leidyanus – type locality for species
• † Dinohyus
  • † Dinohyus hollandi – type locality for species
• † Diospyros
  • † Diospyros miotexana – type locality for species
• † Diplolophus
  • † Diplolophus insolens
• Dipodomys
• † Dipoides
  • † Dipoides rexroadensis
  • † Dipoides stirtoni
  • † Dipoides tanneri – type locality for species
  • † Dipoides williamsi
  • † Dipoides wilsoni – or unidentified comparable form
• † Diprionomys
  • † Diprionomys agrarius – type locality for species
• † Domnina
  • † Domnina dakotensis
  • † Domnina gradata
  • † Domnina thompsoni
• † Domninoides
  • † Domninoides mimicus
  • † Domninoides valentinensis – type locality for species
• † Douglassciurus
  • † Douglassciurus jeffersoni
• † Downsimus
  • † Downsimus chadwicki
• † Drepanomeryx
  • † Drepanomeryx falciformis – type locality for species

• 

  † Dromomeryx
  • † Dromomeryx borealis – type locality for species

E

• † Ecclesimus
  • † Ecclesimus tenuiceps
• † Ectopocynus
  • † Ectopocynus simplicidens – type locality for species
• † Ectypodus
  • † Ectypodus lovei
• † Edaphocyon
  • † Edaphocyon lautus – type locality for species
• † Ekgmowechashala
  • † Ekgmowechashala philotau
• Elaphe
  • † Elaphe guttata
  • † Elaphe kansensis – or unidentified comparable form
  • † Elaphe nebraskensis – type locality for species
  • † Elaphe obsoleta
  • † Elaphe vulpina

• 

  † Elomeryx – tentative report
• Emydoidea
  • † Emydoidea blandingii
  • † Emydoidea hutchisoni – type locality for species
• † Enhydrocyon
  • † Enhydrocyon pahinsintewakpa
• † Entoptychus
  • † Entoptychus grandiplanus – type locality for species
• † Eotylopus
  • † Eotylopus reedi
• † Epeiromys
  • † Epeiromys spanius – type locality for species

• 

  † Epicyon
  • † Epicyon haydeni
  • † Epicyon saevus
• Equus
  • † Equus conversidens – or unidentified comparable form
  • † Equus excelsus
  • † Equus francisci
  • † Equus simplicidens
• Erethizon
  • † Erethizon dorsatum
• Esox

• 

  † Eubelodon
  • † Eubelodon morrilli
• † Eucastor
  • † Eucastor tortus
• † Eucyon
  • † Eucyon davisi
  • † Eucyon skinneri – type locality for species
• † Euhapsis
  • † Euhapsis breugerorum – type locality for species
  • † Euhapsis ellicottae – type locality for species
  • † Euhapsis platyceps – type locality for species

• 

  Eumeces
  • † Eumeces antiquus – type locality for species
  • † Eumeces minimus
  • † Eumeces striatulatus – or unidentified comparable form
• † Eumys
  • † Eumys brachyodus
  • † Eumys elegans
  • † Eumys parvidens – type locality for species
• † Euoplocyon
  • † Euoplocyon brachygnathus
• † Euroxenomys
  • † Euroxenomys wilsoni
• † Eutypomys
  • † Eutypomys thomsoni

F

• † Fanimus
  • † Fanimus ultimus – type locality for species
• Felis
  • † Felis rexroadensis – or unidentified comparable form
• † Florentiamys
  • † Florentiamys tiptoni
• † Floridatragulus
• † Fossorcastor
  • † Fossorcastor greeni – type locality for species

• 

  † Fraxinus
  • † Fraxinus coulteri

G

• 

  † Gaillardia
  • † Gaillardia thomsoni – type locality for species
• † Galbreathia
  • † Galbreathia bettae
  • † Galbreathia novellus
• † Galushaceras – type locality for genus
  • † Galushaceras levellorum – type locality for species
• Geochelone
  • † Geochelone nordensis – type locality for species
  • † Geochelone oelrichi
• Geomys
  • † Geomys bursarius
  • † Geomys lutescens
  • † Geomys quinni
  • † Geomys tobinensis – or unidentified comparable form

• 

  Geranoaetus
  • † Geranoaetus contortus
• † Geringia
  • † Geringia mcgregori
• † Geringophis
  • † Geringophis depressus
  • † Geringophis vetus – type locality for species
  • † Geringophis yatkolae – type locality for species
• Gerrhonotus
  • † Gerrhonotus mungerorum – or unidentified comparable form
• † Gigantocamelus
  • † Gigantocamelus spatulus – type locality for species
• Glyptemys
  • † Glyptemys valentinensis – type locality for species
• † Glyptosaurus
• † Goinophis – type locality for genus
  • † Goinophis minusculus – type locality for species

• 

  † Gomphotherium
  • † Gomphotherium productum – type locality for species
• † Goniodontomys
  • † Goniodontomys disjunctus
• Gopherus
  • † Gopherus laticuneus
• Graptemys
• † Gregorymys
  • † Gregorymys formosus
• † Gripholagomys
  • † Gripholagomys lavocati
• Grus
  • † Grus pratensis
• † Guildayomys
  • † Guildayomys hibbardi – type locality for species

H

• † Harrisonsaurus – type locality for genus
  • † Harrisonsaurus fossilis – type locality for species
• † Harrymys
  • † Harrymys magnus

• 

  † Hayoceros
  • † Hayoceros barbouri – type locality for species
• † Helagras
  • † Helagras orellanensis – type locality for species
• † Heliscomys
  • † Heliscomys hatcheri
  • † Heliscomys macdonaldi – type locality for species
  • † Heliscomys mcgrewi – type locality for species
  • † Heliscomys vetus
• † Helodermoides
  • † Helodermoides tuberculatus
• † Hemiauchenia
  • † Hemiauchenia macrocephala
• † Heptacodon
  • † Heptacodon occidentale – or unidentified comparable form
• † Herpetotherium
  • † Herpetotherium fugax
  • † Herpetotherium youngi
• † Hesperhys
  • † Hesperhys vagrans

• 

  † Hesperocyon
  • † Hesperocyon gregarius
• † Hesperolagomys
  • † Hesperolagomys fluviatilis
  • † Hesperolagomys galbreathi – or unidentified comparable form
• † Hesperoscalops
  • † Hesperoscalops mcgrewi
• † Hesperotestudo
  • † Hesperotestudo angusticeps – type locality for species
  • † Hesperotestudo orthopygia
• Heterodon
  • † Heterodon nasicus
  • † Heterodon platyrhinos
• † Heteromeryx
  • † Heteromeryx dispar
• † Hibbardomys
  • † Hibbardomys marthae – type locality for species
  • † Hibbardomys skinneri – type locality for species
  • † Hibbardomys voorhiesi – type locality for species
• † Hipparion
  • † Hipparion forcei
  • † Hipparion tehonense
• † Hippotherium
• † Hitonkala
  • † Hitonkala macdonaldtau – type locality for species
• Holbrookia – tentative report
  • † Holbrookia antiqua – type locality for species

• 

  † Homotherium
  • † Homotherium crusafonti
• † Hoplophoneus
  • † Hoplophoneus mentalis
  • † Hoplophoneus primaevus
• † Hyaenodon
  • † Hyaenodon crucians
• Hyla
  • † Hyla gratiosa – or unidentified comparable form
  • † Hyla squirella – or unidentified comparable form
  • † Hyla versicolor – or unidentified comparable form
• † Hypertragulus
  • † Hypertragulus calcaratus
  • † Hypertragulus chadronensis – type locality for species
  • † Hypertragulus crawfordensis – type locality for species
  • † Hypertragulus minor – type locality for species
  • † Hypertragulus quadratus – type locality for species
  • † Hypertragulus sequens – type locality for species
• † Hypisodus
  • † Hypisodus alacer
  • † Hypisodus ironsi – type locality for species
  • † Hypisodus minimus
  • † Hypisodus paululus – type locality for species
  • † Hypisodus retallacki – type locality for species

• 

  † Hypohippus
  • † Hypohippus affinis
  • † Hypohippus osborni
  • † Hypohippus pertinax – or unidentified comparable form
• † Hypolagus
  • † Hypolagus fontinalis
  • † Hypolagus furlongi
  • † Hypolagus parviplicatus
  • † Hypolagus regalis
  • † Hypolagus ringoldensis
  • † Hypolagus vetus
  • † Hypolagus voorhiesi
• † Hypsiops
  • † Hypsiops breviceps

• 

  † Hyracodon
  • † Hyracodon leidyanus
  • † Hyracodon nebraskensis
• † Hystricops
  • † Hystricops venustus

I

• Ictalurus
  • † Ictalurus echinatus
  • † Ictalurus lambda
  • † Ictalurus leidyi – or unidentified comparable form
  • † Ictalurus punctatus – or unidentified comparable form
• † Idiogenomys – type locality for genus
  • † Idiogenomys ozziei – type locality for species
• Ilex

• 

  † Indarctos
  • † Indarctos oregonensis
• † Ischyrocyon
  • † Ischyrocyon gidleyi
• † Ischyromys
  • † Ischyromys douglassi
  • † Ischyromys typus
  • † Ischyromys veterior

J

• † Jimomys
  • † Jimomys labaughi – type locality for species
• Juglans

K

• 

  † Kalobatippus
  • † Kalobatippus agatensis
• † Kansasimys
• Kinosternon
  • † Kinosternon flavescens
• † Kirkomys
  • † Kirkomys nebraskensis

L

• † Lambdoceras
  • † Lambdoceras siouxensis

• 

  Lampropeltis
  • † Lampropeltis calligaster
  • † Lampropeltis getulus
  • † Lampropeltis similis – type locality for species
  • † Lampropeltis triangulum
• † Lantanotherium
  • † Lantanotherium observatum – type locality for species
• Lasiurus
• † Leidymys
  • † Leidymys blacki
  • † Leidymys cerasus – type locality for species
• Leiocephalus
  • † Leiocephalus nebraskensis
  • † Leiocephalus septentrionalis – type locality for species
• † Lemoynea
  • † Lemoynea biradicularis – type locality for species

• 

  Lepisosteus
• † Lepoides
  • † Lepoides lepoides – type locality for species
• Lepomis
  • † Lepomis microlophus
• † Leptarctus
  • † Leptarctus martini – type locality for species
  • † Leptarctus oregonensis
  • † Leptarctus primus
  • † Leptarctus wortmani – type locality for species
• † Leptauchenia
  • † Leptauchenia decora
  • † Leptauchenia major
• † Leptochoerus
  • † Leptochoerus elegans
  • † Leptochoerus emilyae
  • † Leptochoerus spectabilis
  • † Leptochoerus supremus

• 

  † Leptocyon
  • † Leptocyon gregorii – or unidentified comparable form
  • † Leptocyon leidyi – type locality for species
  • † Leptocyon matthewi – type locality for species
  • † Leptocyon vafer
  • † Leptocyon vulpinus
• † Leptodontomys
  • † Leptodontomys douglassi
  • † Leptodontomys stirtoni – or unidentified comparable form

• 

  † Leptomeryx
  • † Leptomeryx elissae – type locality for species
  • † Leptomeryx esulcatus
  • † Leptomeryx evansi
  • † Leptomeryx speciosus
• † Leptotomus
• Lepus
  • † Lepus californicus – or unidentified comparable form
• Lichanura
• † Lignimus
  • † Lignimus montis
• † Limnoecus
  • † Limnoecus compressus
  • † Limnoecus niobrarensis – type locality for species
• Liquidambar
• † Longirostromeryx
  • † Longirostromeryx wellsi

• 

  Lontra
• † Loupomys
• † Lowesaurus
  • † Lowesaurus matthewi
• Lycopodium

M

• † Machaeromeryx
  • † Machaeromeryx tragulus – type locality for species

• 

  † Machairodus
• Macrochelys
  • † Macrochelys schmidti
  • † Macrochelys temminckii
• † Macrogenis
  • † Macrogenis crassigenis
• † Macrognathomys
• Mahonia
  • † Mahonia marginata
• † Mammacyon
• † Mammut
  • † Mammut matthewi
• † Mammuthus

  • 

    † Mammuthus columbi
• Martes
  • † Martes parviloba
• † Martinogale
  • † Martinogale alveodens
• Masticophis
  • † Masticophis flagellum
• † Matthewlabis
  • † Matthewlabis cedrensis
• † Mediochoerus
  • † Mediochoerus blicki – type locality for species
  • † Mediochoerus johnsoni – type locality for species
• † Megacamelus
  • † Megacamelus merriami – or unidentified comparable form

• 

  † Megahippus
  • † Megahippus matthewi
  • † Megahippus mckennai
• † Megalagus
  • † Megalagus brachyodon
  • † Megalagus primitivus
  • † Megalagus turgidus
• † Megalictis
  • † Megalictis ferox
• † Megalonyx
  • † Megalonyx curvidens
  • † Megalonyx leptostomus
• † Megantereon – tentative report
  • † Megantereon hesperus
• † Megasminthus
  • † Megasminthus gladiofex
  • † Megasminthus tiheni
• † Megatylopus
  • † Megatylopus cochrani
  • † Megatylopus gigas
  • † Megatylopus primaevus – or unidentified comparable form
• † Meliakrouniomys
• † Meliosma
  • † Meliosma predentata – type locality for species
• † Meniscomys

• 

  † Menoceras
  • † Menoceras arikarense – type locality for species
  • † Menoceras barbouri
• Mephitis
  • † Mephitis mephitis
• † Merychippus
  • † Merychippus calamarius – or unidentified comparable form
  • † Merychippus coloradense
  • † Merychippus insignis
  • † Merychippus primus
  • † Merychippus quintus
  • † Merychippus republicanus

• 

  † Merychyus
  • † Merychyus arenarum
  • † Merychyus crabilli – type locality for species
  • † Merychyus elegans
  • † Merychyus minimus – type locality for species
  • † Merychyus novomexicanus
  • † Merychyus relictus
  • † Merychyus siouxensis – or unidentified comparable form
• † Merycochoerus
  • † Merycochoerus magnus – type locality for species
  • † Merycochoerus matthewi
  • † Merycochoerus proprius

• 

  † Merycodus
  • † Merycodus necatus
  • † Merycodus prodromus – type locality for species
  • † Merycodus sabulonis
  • † Merycodus warreni
• † Merycoides
  • † Merycoides longiceps
• † Merycoidodon
  • † Merycoidodon bullatus
  • † Merycoidodon culbertsoni – type locality for species
  • † Merycoidodon major
• † Mesocyon – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Mesocyon temnodon
• † Mesogaulus
  • † Mesogaulus paniensis
• † Mesohippus
  • † Mesohippus bairdi
• † Mesoreodon
  • † Mesoreodon chelonyx
  • † Mesoreodon minor
• † Mesoscalops
  • † Mesoscalops scopelotemos
• † Metadjidaumo
  • † Metadjidaumo hendryi – or unidentified comparable form

• 

  † Metailurus
• † Metalopex
  • † Metalopex merriami
• † Metatomarctus
  • † Metatomarctus canavus
• † Metechinus
  • † Metechinus amplior
• † Michenia
  • † Michenia agatensis – type locality for species
• † Micronatrix – type locality for genus
  • † Micronatrix juliescottae – type locality for species
• † Micropternodus
  • † Micropternodus borealis
  • † Micropternodus montrosensis – type locality for species
• Micropterus
• † Microtomarctus
  • † Microtomarctus conferta
• Microtus
  • † Microtus ochrogaster
  • † Microtus pennsylvanicus
• Micrurus
• Mictomys
  • † Mictomys kansasensis
  • † Mictomys meltoni
  • † Mictomys vetus – or unidentified comparable form
• † Migmacastor – type locality for genus
  • † Migmacastor procumbodens – type locality for species

• 

  † Miniochoerus
  • † Miniochoerus affinis
  • † Miniochoerus chadronensis
  • † Miniochoerus forsythae
  • † Miniochoerus gracilis
  • † Miniochoerus helprini – type locality for species
  • † Miniochoerus starkensis – type locality for species
• † Mioheteromys
  • † Mioheteromys amplissimus – type locality for species
  • † Mioheteromys subterior – type locality for species

• 

  † Miohippus
  • † Miohippus intermedius – or unidentified comparable form
• † Miolabis
  • † Miolabis princetonianus – type locality for species
• † Miomustela
  • † Miomustela madisonae
• † Mionictis
  • † Mionictis elegans – type locality for species
  • † Mionictis incertus – type locality for species
  • † Mionictis letifer – type locality for species
  • † Mionictis pristinus
• † Miosicista
  • † Miosicista angulus – type locality for species
• † Miospermophilus
  • † Miospermophilus bryanti
  • † Miospermophilus wyomingensis
• † Miotapirus
  • † Miotapirus harrisonensis
• † Miotylopus
  • † Miotylopus gibbi
  • † Miotylopus leonardi
• † Monosaulax
  • † Monosaulax curtus
  • † Monosaulax pansus
  • † Monosaulax skinneri – type locality for species
  • † Monosaulax tedi – type locality for species
• † Mookomys
  • † Mookomys altifluminis
  • † Mookomys altifluminus
• † Moropus
  • † Moropus elatus
  • † Moropus hollandi – type locality for species
  • † Moropus merriami
• Mustela
  • † Mustela frenata
  • † Mustela nigripes
  • † Mustela rexroadensis – or unidentified comparable form
  • † Mustela vison
• Mycteria
  • † Mycteria milleri
• † Mylagaulus
  • † Mylagaulus cambridgensis

• 

  † Mylohyus
• Myotis
• † Mystipterus
  • † Mystipterus martini

N

• † Namatomys
  • † Namatomys lloydi

• 

  † Nannippus
  • † Nannippus lenticularis
• † Nanodelphys
  • † Nanodelphys hunti
• † Nanotragulus
  • † Nanotragulus loomisi
  • † Nanotragulus ordinatus
• Natrix – or unidentified comparable form
• † Nebraskomys
  • † Nebraskomys mcgrewi – type locality for species
• † Nebraskophis – type locality for genus
  • † Nebraskophis skinneri – type locality for species

• 

  † Neohipparion
  • † Neohipparion affine
  • † Neohipparion eurystyle – or unidentified comparable form
  • † Neohipparion leptode
  • † Neohipparion trampasense
• † Neonatrix – type locality for genus
  • † Neonatrix elongata – type locality for species
  • † Neonatrix infera – or unidentified comparable form
  • † Neonatrix magna – type locality for species

• 

  Neophrontops
  • † Neophrontops vetustus – type locality for species
• Neotamias
• Neotoma
  • † Neotoma quadriplicata – or unidentified comparable form
  • † Neotoma sawrockensis – or unidentified comparable form
• † Neotragocerus
  • † Neotragocerus improvisus – type locality for species
• Nerodia
  • † Nerodia hillmani
  • † Nerodia rhombifera
  • † Nerodia sipedon
• † Nexuotapirus
  • † Nexuotapirus marslandensis – type locality for species

• 

  † Nimravides
  • † Nimravides galiani
  • † Nimravides pedionomus – type locality for species
  • † Nimravides thinobates
• † Nordenosaurus
  • † Nordenosaurus magnus – type locality for species
• † Nothodipoides
  • † Nothodipoides planus
  • † Nothodipoides stirtoni – type locality for species
• † Nothotylopus
• † Nototamias
  • † Nototamias quadratus – type locality for species
• † Nyssa
  • † Nyssa copeana

O

• † Ocajila
  • † Ocajila makpiyahe
• Ochotona
  • † Ochotona spanglei – or unidentified comparable form
• Odocoileus

  • 

    † Odocoileus virginianus
• Ogmodontomys
  • † Ogmodontomys poaphagus
• † Ogmophis
  • † Ogmophis compactus
  • † Ogmophis miocompactus
• † Oligobunis
• † Oligomyotis
• † Oligoryctes
  • † Oligoryctes cameronensis
• † Oligoscalops
  • † Oligoscalops galbreathi
• † Oligospermophilus
  • † Oligospermophilus douglassi

• 

  Ondatra
  • † Ondatra annectens – or unidentified comparable form
  • † Ondatra idahoensis
  • † Ondatra meadensis
  • † Ondatra zibethicus
• Onychomys
  • † Onychomys larabeei – or unidentified comparable form
  • † Onychomys leucogaster – or unidentified comparable form
  • † Onychomys pedroensis – or unidentified comparable form
• Opheodrys – or unidentified comparable form
• † Ophiomys
  • † Ophiomys fricki
  • † Ophiomys magilli
  • † Ophiomys parvus
• Ophisaurus

  • 

    † Ophisaurus ventralis
• † Orelladjidaumo
  • † Orelladjidaumo xylodes – type locality for species
• † Oreolagus
  • † Oreolagus nebrascensis – type locality for species
• † Oropyctis
  • † Oropyctis pediasius – type locality for species
• Ortalis
  • † Ortalis tantala – type locality for species
• † Osbornodon
  • † Osbornodon fricki
  • † Osbornodon iamonensis
  • † Osbornodon renjiei
• † Oxetocyon
  • † Oxetocyon cuspidatus

• 

  † Oxydactylus
  • † Oxydactylus longipes

P

• † Paciculus
  • † Paciculus nebraskensis – type locality for species
• † Paenemarmota
  • † Paenemarmota barbouri
  • † Paenemarmota nevadensis – or unidentified comparable form
  • † Paenemarmota sawrockensis
• † Palaealectoris – type locality for genus
  • † Palaealectoris incertus – type locality for species
• † Palaeastur – type locality for genus
  • † Palaeastur atavus – type locality for species

• 

  † Palaeocastor
• † Palaeogale
  • † Palaeogale dorothiae
  • † Palaeogale minuta – or unidentified comparable form
• † Palaeolagus
  • † Palaeolagus burkei
  • † Palaeolagus haydeni – type locality for species
  • † Palaeolagus hemirhizis – type locality for species
  • † Palaeolagus hypsodus
  • † Palaeolagus intermedius
  • † Palaeolagus philoi
  • † Palaeolagus temnodon
• † Paleoheterodon – type locality for genus
  • † Paleoheterodon tiheni – type locality for species
• Panthera

  • 

    † Panthera leo
• † Parablastomeryx
  • † Parablastomeryx gregorii – type locality for species
• † Paracoluber
  • † Paracoluber storeri
• † Paracosoryx
  • † Paracosoryx dawesensis
  • † Paracosoryx wilsoni
• † Paracryptotis
• † Paractiornis – type locality for genus
  • † Paractiornis perpusillus – type locality for species
• † Paracynarctus
  • † Paracynarctus kelloggi
  • † Paracynarctus sinclairi – type locality for species
• † Paradaphoenus
  • † Paradaphoenus minimus
  • † Paradaphoenus tooheyi – type locality for species
• † Paradjidaumo
  • † Paradjidaumo trilophus
  • † Paradjidaumo validus – type locality for species
• † Paraenhydrocyon
  • † Paraenhydrocyon wallovianus
• † Paragerrhonotus – or unidentified comparable form
  • † Paragerrhonotus ricardensis
• † Parahippus
  • † Parahippus atavus
  • † Parahippus cognatus
• † Parallomys
  • † Parallomys americanus – type locality for species
• † Paramerychyus
  • † Paramerychyus harrisonensis
  • † Paramerychyus relictus
• † Paramicrotoscoptes
  • † Paramicrotoscoptes hibbardi
• † Paramiolabis
  • † Paramiolabis tenuis

• 

  † Paramylodon
  • † Paramylodon harlani
• † Paramys
  • † Paramys relictus
• † Paranamatomys
  • † Paranamatomys storeri
• † Parapliosaccomys
  • † Parapliosaccomys annae
  • † Parapliosaccomys hibbardi
• Parascalops – or unidentified comparable form
• † Parataxidea – or unidentified comparable form
• † Paratomarctus
  • † Paratomarctus euthos
  • † Paratomarctus temerarius

• 

  † Paratylopus
  • † Paratylopus labiatus
  • † Paratylopus primaevus
• † Parictis
  • † Parictis gilpini
• † Paronychomys
• † Parophisaurus
  • † Parophisaurus pawneensis
• † Parvericius
  • † Parvericius montanus
  • † Parvericius voorhiesi – type locality for species
• † Parvitragulus – tentative report
• † Pediohierax – type locality for genus
  • † Pediohierax ramenta – type locality for species
• † Pediolophodon
• † Pediomeryx
  • † Pediomeryx hemphillensis – or unidentified comparable form

• 

  † Peltosaurus
  • † Peltosaurus granulosus
• † Pelycomys
  • † Pelycomys brulanus – type locality for species
  • † Pelycomys placidus – or unidentified comparable form
• † Penetrigonias
  • † Penetrigonias dakotensis – type locality for species
• † Peraceras
  • † Peraceras profectum
  • † Peraceras superciliosum
• † Perchoerus
  • † Perchoerus probus – tentative report
• † Peridiomys
  • † Peridiomys borealis
  • † Peridiomys rusticus – type locality for species

• 

  Perognathus
  • † Perognathus brevidens
  • † Perognathus coquorum
  • † Perognathus furlongi – or unidentified comparable form
  • † Perognathus minutus – or unidentified comparable form
  • † Perognathus pearlettensis
  • † Perognathus trojectioansrum
• Peromyscus
  • † Peromyscus kansasensis – or unidentified comparable form
• † Petauristodon
• † Petenyia – or unidentified comparable form
• † Phasianus
  • † Phasianus mioceanus – type locality for species
• † Phelosaccomys
• † Phenacocoelus
  • † Phenacocoelus typus – type locality for species
• Phenacomys
  • † Phenacomys intermedius – or unidentified comparable form

• 

  † Phlaocyon
  • † Phlaocyon annectens
  • † Phlaocyon leucosteus
  • † Phlaocyon mariae – type locality for species
  • † Phlaocyon marslandensis
  • † Phlaocyon minor
  • † Phlaocyon yatkolai – type locality for species
• Phrynosoma
  • † Phrynosoma cornutum
• Picea
• Pinus
• † Pipestoneomys
  • † Pipestoneomys bisulcatus
• Pituophis
  • † Pituophis catenifer
  • † Pituophis melanoleucus
• † Planisorex
  • † Planisorex dixonensis
• Platanus
  • † Platanus vitifolia – type locality for species

• 

  † Platybelodon
  • † Platybelodon barnumbrowni
  • † Platybelodon loomisi
• † Platygonus
  • † Platygonus compressus
  • † Platygonus pollenae – type locality for species
• † Pleiolama
  • † Pleiolama mckennai – type locality for species
  • † Pleiolama vera – or unidentified comparable form
• † Plesiogulo
  • † Plesiogulo lindsayi – or unidentified comparable form
• † Plesiosorex
  • † Plesiosorex coloradensis
  • † Plesiosorex donroosai
  • † Plesiosorex greeni
• † Pleurolicus
  • † Pleurolicus exiguus – type locality for species
  • † Pleurolicus hemingfordensis
  • † Pleurolicus sulcifrons – or unidentified comparable form
• † Pliauchenia
  • † Pliauchenia magnifontis
• † Plioceros
  • † Plioceros dehlini – type locality for species
  • † Plioceros floblairi – type locality for species
• † Pliocyon
  • † Pliocyon medius – type locality for species
• † Pliogale
  • † Pliogale furlongi
• † Pliogeomys
  • † Pliogeomys russelli – type locality for species

• 

  † Pliohippus
  • † Pliohippus mirabilis
  • † Pliohippus nobilis
  • † Pliohippus pernix
• † Pliolemmus
  • † Pliolemmus antiquus
• † Pliometanastes
• † Plionarctos
• † Plionictis
  • † Plionictis ogygia
• † Pliophenacomys
  • † Pliophenacomys osborni
  • † Pliophenacomys primaevus
• † Pliosaccomys
• † Pliotaxidea
  • † Pliotaxidea garberi
  • † Pliotaxidea nevadensis
• † Pliozapus
  • † Pliozapus solus – or unidentified comparable form
• † Plithocyon
• † Poebrotherium
  • † Poebrotherium eximium
  • † Poebrotherium wilsoni

• 

  † Pogonodon
  • † Pogonodon brachyops
• Populus
  • † Populus crassa
  • † Populus gallowayi – type locality for species
  • † Populus washoensis
• † Potamonycteris – type locality for genus
  • † Potamonycteris biperforatus – type locality for species
• † Priusaulax
  • † Priusaulax browni – type locality for species
• † Proantilocapra
  • † Proantilocapra platycornea – type locality for species
• † Probassariscus
  • † Probassariscus matthewi
• † Problastomeryx
  • † Problastomeryx primus
• † Procamelus
  • † Procamelus grandis
  • † Procamelus leptocolon
  • † Procamelus occidentalis
• † Procastoroides
  • † Procastoroides idahoensis
  • † Procastoroides sweeti – type locality for species
• † Procranioceras
  • † Procranioceras skinneri
• † Prodipodomys
• † Prodipoides
  • † Prodipoides burgensis – type locality for species
  • † Prodipoides dividerus
  • † Prodipoides katensis
• † Proharrymys
  • † Proharrymys fedti
  • † Proharrymys schlaikjeri
  • † Proharrymys wahlerti – type locality for species
• † Proheteromys
  • † Proheteromys ironcloudi
• † Promartes
  • † Promartes darbyi
  • † Promartes lepidus – or unidentified comparable form
  • † Promartes olcotti – type locality for species

• 

  † Promerycochoerus
  • † Promerycochoerus carrikeri
  • † Promerycochoerus superbus
• † Promilio
  • † Promilio efferus – type locality for species
• † Promylagaulus
  • † Promylagaulus riggsi
• † Pronotolagus
  • † Pronotolagus albus
  • † Pronotolagus apachensis
  • † Pronotolagus whitei – type locality for species
• † Proscalops
  • † Proscalops miocaenus – or unidentified comparable form
  • † Proscalops secundus
  • † Proscalops tertius
• † Prosciurus
  • † Prosciurus albiclivus
  • † Prosciurus dawsonae
  • † Prosciurus magnus – type locality for species
  • † Prosciurus parvus – type locality for species
  • † Prosciurus vetustus
• † Prosomys
  • † Prosomys mimus
• † Prosthennops
  • † Prosthennops niobrarensis
  • † Prosthennops serus
  • † Prosthennops xiphodonticus
• † Prosynthetoceras
• † Protemnocyon – type locality for genus
  • † Protemnocyon inflatus – type locality for species
• † Proterix
  • † Proterix bicuspis

• 

  † Protoceras
  • † Protoceras skinneri
• † Protohippus
  • † Protohippus gidleyi
  • † Protohippus perditus
  • † Protohippus supremus
• † Protolabis
  • † Protolabis gracilis – or unidentified comparable form
  • † Protolabis heterodontus
  • † Protolabis saxeus – type locality for species
• † Protomarctus
  • † Protomarctus optatus
• † Protoprocyon
  • † Protoprocyon savagei – type locality for species
• † Protosciurus
  • † Protosciurus mengi – type locality for species
• † Protospermophilus
  • † Protospermophilus kelloggi
  • † Protospermophilus quatalensis – or unidentified comparable form
• Prunus
  • † Prunus acuminata – type locality for species
• † Psalidocyon
  • † Psalidocyon marianae
• Pseudacris
  • † Pseudacris clarki – or unidentified comparable form
  • † Pseudacris nordensis – type locality for species

• 

  † Pseudaelurus
  • † Pseudaelurus aeluroides – type locality for species
  • † Pseudaelurus intrepdius – or unidentified comparable form
  • † Pseudaelurus intrepidus
  • † Pseudaelurus marshi – type locality for species
  • † Pseudaelurus stouti
  • † Pseudaelurus validus
• † Pseudhipparion
  • † Pseudhipparion gratum – type locality for species
  • † Pseudhipparion retrusum
  • † Pseudhipparion skinneri
• † Pseudoblastomeryx
  • † Pseudoblastomeryx advena – type locality for species
• † Pseudoceras
  • † Pseudoceras skinneri – type locality for species
• † Pseudocylindrodon
  • † Pseudocylindrodon neglectus
• † Pseudocyon
• † Pseudolabis
  • † Pseudolabis dakotensis
• † Pseudomyscus
  • † Pseudomyscus bathygnathus – type locality for species
• † Pseudoparablastomeryx
  • † Pseudoparablastomeryx francescita
  • † Pseudoparablastomeryx scotti

• 

  † Pseudoprotoceras
  • † Pseudoprotoceras longinaris – type locality for species
• † Pseudotheridomys
• † Pseudotrimylus
  • † Pseudotrimylus blacki – type locality for species
  • † Pseudotrimylus roperi
• Pterocarya
  • † Pterocarya oregoniana
• † Pterogaulus
  • † Pterogaulus barbarellae – type locality for species
  • † Pterogaulus laevis
• † Pterygoboa
  • † Pterygoboa miocenica
• † Pylodictis
  • † Pylodictis olivaris

Q

• 

  Quercus
  • † Quercus argentum
  • † Quercus parvula – type locality for species
  • † Quercus preturbinella – type locality for species
  • † Quercus remingtoni

R

• † Rakomeryx
  • † Rakomeryx sinclairi

• 

  † Ramoceros
  • † Ramoceros osborni
• † Rana
  • † Rana catesbeiana
  • † Rana clamitans
  • † Rana pipiens
  • † Rana sylvatica
• † Regina
  • † Regina grahami
• Reithrodontomys
  • † Reithrodontomys pratincola
• † Repomys
  • † Repomys gustelyi

• 

  Rhineura
  • † Rhineura hatcherii
  • † Rhineura marslandensis – type locality for species
• Rhinocheilus
  • † Rhinocheilus lecontei
• † Ribes
  • † Ribes infrequens – type locality for species
• † Robinia
  • † Robinia lesquereuxi
• † Russellagus
  • † Russellagus vonhofi

S

• 

  Salix
• Salvadora
  • † Salvadora paleolineata – type locality for species
• † Sanctimus
  • † Sanctimus falkenbachi – type locality for species
  • † Sanctimus stouti – or unidentified comparable form
  • † Sanctimus stuartae
• † Sarcobatus – or unidentified comparable form
• † Satherium
  • † Satherium piscinarium
• † Scalopoides
  • † Scalopoides hutchisoni – type locality for species
  • † Scalopoides isodens
  • † Scalopoides ripafodiator
• Scalopus
  • † Scalopus aquaticus
• Scaphiopus
  • † Scaphiopus wardorum – type locality for species

• 

  † Scaphohippus
  • † Scaphohippus intermontanus
  • † Scaphohippus sumani
• Sceloporus
  • † Sceloporus robustus
  • † Sceloporus undulatus
• † Schaubeumys
  • † Schaubeumys cartomylos
  • † Schaubeumys clivosus
  • † Schaubeumys grangeri
  • † Schaubeumys sabrae
• † Schizodontomys
  • † Schizodontomys amnicolus – type locality for species
  • † Schizodontomys harkseni – or unidentified comparable form
• † Scottimus
  • † Scottimus lophatus – type locality for species
  • † Scottimus viduus – type locality for species
• Sequoia – or unidentified comparable form
• † Serbelodon
  • † Serbelodon barbourensis

• 

  † Sespia
  • † Sespia nitida
• Sigmodon
  • † Sigmodon minor
• † Simimys – tentative report
• † Sinclairella
  • † Sinclairella dakotensis
• † Sinclairomeryx
  • † Sinclairomeryx riparius – type locality for species
• Siren
• Sistrurus
  • † Sistrurus catenatus
• † Skinnerhyus – type locality for genus
  • † Skinnerhyus shermerorum – type locality for species
• † Skinneroceras – type locality for genus
  • † Skinneroceras manningi – type locality for species

• 

  † Smilodon
  • † Smilodon fatalis – or unidentified comparable form
• † Sminthosinis
• Sorex
  • † Sorex arcticus
  • † Sorex cinereus
  • † Sorex edwardsi – type locality for species
  • † Sorex palustris
  • † Sorex sandersi
  • † Sorex yatkolai – type locality for species
• Spea
  • † Spea bombifrons
  • † Spea neuter
• Spermophilus
  • † Spermophilus boothi
  • † Spermophilus cyanocittus – type locality for species
  • † Spermophilus elegans
  • † Spermophilus franklinii – or unidentified comparable form
  • † Spermophilus johnstoni
  • † Spermophilus matthewi – type locality for species
  • † Spermophilus meltoni
  • † Spermophilus richardsonii
  • † Spermophilus shotwelli – or unidentified comparable form
  • † Spermophilus tridecemlineatus
• † Sphenophalos
  • † Sphenophalos middleswarti – type locality for species
• Spizaetus
  • † Spizaetus tanneri – type locality for species

• 

  † Stegomastodon
  • † Stegomastodon aftoniae
  • † Stegomastodon primitivus
• † Stehlinia – tentative report
• † Steneofiber
  • † Steneofiber barbouri
  • † Steneofiber fossor
• † Stenomylus
  • † Stenomylus crassipes – type locality for species
  • † Stenomylus gracilis
  • † Stenomylus hitchcocki – type locality for species
• Sthenictis
  • † Sthenictis bellus – type locality for species
  • † Sthenictis dolichops – type locality for species
• † Stibarus
  • † Stibarus obtusilobus
  • † Stibarus quadricuspis
• † Stratimus
  • † Stratimus strobeli – type locality for species
• † Stuckyhyus
  • † Stuckyhyus siouxensis – type locality for species
• † Stylemys
  • † Stylemys nebrascensis

• 

  † Subdromomeryx
  • † Subdromomeryx antilopinus
• † Subhyracodon
  • † Subhyracodon mitis
• † Submeryceros
  • † Submeryceros minor
• † Sunkahetanka
  • † Sunkahetanka geringensis
• Sylvilagus
  • † Sylvilagus floridanus
• Synaptomys
  • † Synaptomys cooperi
• † Syndyoceras
  • † Syndyoceras cooki – type locality for species

• 

  † Synthetoceras
  • † Synthetoceras tricornatus

T

• Tamias
  • † Tamias ateles
• † Tanymykter
  • † Tanymykter brachyodontus
  • † Tanymykter longirostris – type locality for species
• Tapirus
  • † Tapirus johnsoni – type locality for species
  • † Tapirus polkensis – or unidentified comparable form
  • † Tapirus simpsoni
• Taxidea
  • † Taxidea taxus

• 

  † Teleoceras
  • † Teleoceras americanum
  • † Teleoceras fossiger
  • † Teleoceras hicksi
  • † Teleoceras major – type locality for species
  • † Teleoceras medicornutum
  • † Teleoceras meridianum
• † Temnocyon
  • † Temnocyon percussor – type locality for species
  • † Temnocyon typicus – type locality for species
• † Temperocastor
  • † Temperocastor valentinensis
• † Tenudomys
  • † Tenudomys basilaris – type locality for species
  • † Tenudomys ridgeviewensis – type locality for species
  • † Tenudomys titanus
• † Tephrocyon
  • † Tephrocyon scitulus
• Terrapene
  • † Terrapene corneri – type locality for species

  • 

    † Terrapene ornata – type locality for species
• † Tetrabelodon
  • † Tetrabelodon osborni
• † Texasophis
• † Texoceros
  • † Texoceros altidens – type locality for species
  • † Texoceros guymonensis
• Thamnophis
  • † Thamnophis proximus
  • † Thamnophis radix
  • † Thamnophis sirtalis

• 

  † Thinobadistes
• † Thinohyus
• Thomomys
• † Thylacaelurus
  • † Thylacaelurus montanus
• † Ticholeptus
  • † Ticholeptus zygomaticus
• Tilia
• † Titanotylopus
  • † Titanotylopus nebraskensis – type locality for species
• † Tomarctus
  • † Tomarctus brevirostris
  • † Tomarctus hippophaga – type locality for species
• Trachemys
  • † Trachemys inflata – or unidentified comparable form
• † Tregophis
  • † Tregophis brevirachis
• † Trigenicus
  • † Trigenicus profectus
• † Trigonias
  • † Trigonias osborni
  • † Trigonias wellsi
• † Trigonictis
  • † Trigonictis cookii
  • † Trigonictis macrodon
• † Trilaccogaulus
  • † Trilaccogaulus ovatus
• Trionyx
  • † Trionyx quinni – type locality for species
• Tropidoclonion – or unidentified comparable form
• † Tylionomys
  • † Tylionomys voorhiesi – type locality for species
  • † Tylionomys woodi
• † Tylocephalonyx
  • † Tylocephalonyx skinneri – type locality for species

U

• 

  Ulmus
  • † Ulmus speciosa
• † Umbogaulus
  • † Umbogaulus galushai – type locality for species
  • † Umbogaulus monodon – type locality for species
• † Untermannerix
  • † Untermannerix copiosus
• Urocyon
• † Ursavus
  • † Ursavus brevirhinus – or unidentified comparable form
• † Urubitinga
  • † Urubitinga enecta – type locality for species
• † Ustatochoerus
  • † Ustatochoerus major
  • † Ustatochoerus medius

V

• 

  Vitis
  • † Vitis pannosa – type locality for species
• Vulpes
  • † Vulpes stenognathus
  • † Vulpes velox

W

• † Wilsoneumys
  • † Wilsoneumys planidens
• † Wrightohyus
  • † Wrightohyus yatkolai

Y

• † Yatkolamys
  • † Yatkolamys edwardsi – type locality for species

• 

  † Ysengrinia
  • † Ysengrinia americana
• † Yumaceras
  • † Yumaceras figginsi

Z

• Zapus
  • † Zapus hudsonius
  • † Zapus sandersi
• † Zemiodontomys
  • † Zemiodontomys burkei
• † Zetamys
  • † Zetamys nebraskensis
• † Ziamys
  • † Ziamys hugeni
• † Zodiolestes
  • † Zodiolestes daimonelixensis – type locality for species

• 

  † Zygolophodon

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.