List of the Cenozoic life of Utah

Last updated April 14, 2024

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

A

Abies
† Achaenodon
- † Achaenodon uintensis – type locality for species
† Acmeodon
† Acrocera
- † Acrocera hirsuta – type locality for species
† Aenocyon
- † Aenocyon dirus – or unidentified comparable form
† Aepinacodon
† Aethomylos
- † Aethomylos simplicidens
† Ageina – or unidentified comparable form
Life restoration of the Eocene-Oligocene even-toed ungulate Agriochoerus
† Agriochoerus
- † Agriochoerus maximus
Alligator
† Allognathosuchus – or unidentified comparable form
† Allophaiomys
- † Allophaiomys pliocaenicus
Amia
- † Amia uintensis
Amyda
- † Amyda crassa – type locality for species
- † Amyda gregaria
† Amynodon
- † Amynodon advenus
- † Amynodon reedi
† Anaptomorphus
- † Anaptomorphus aemulus
† Anemorhysis
† Anisonchus
- † Anisonchus athelas
- † Anisonchus oligistus
- † Anisonchus onostus
- † Anisonchus sectorius
Fossilized shell of the Eocene-Oligocene turtle Anosteira
† Anosteira
- † Anosteira ornata
Anthonomus
- † Anthonomus soporus
† Antiacodon
- † Antiacodon pygmaeus
Antilocapra
- † Antilocapra americana – or unidentified comparable form
Apalone
† Apataelurus
- † Apataelurus kayi – type locality for species
† Apatemys
- † Apatemys bellulus – or unidentified comparable form
- † Apatemys bellus – or unidentified comparable form
- † Apatemys rodens – or unidentified comparable form
- † Apatemys uintensis – type locality for species
† Aphronorus
- † Aphronorus simpsoni
Restoration of an Arctodus , or short-faced bear, with a human to scale
† Arctodus
- † Arctodus simus
† Armintodelphys
- † Armintodelphys dawsoni
† Artemisia
† Asilopsis – type locality for genus
- † Asilopsis fusculus – type locality for species
† Asilus
- † Asilus palaeolestes – type locality for species
† Aulobaris
- † Aulobaris circumscripta
- † Aulobaris comminuta – type locality for species
† Auxontodon
- † Auxontodon pattersoni

B

† Baena
- † Baena arenosa – type locality for species
- † Baena emiliae
† Baptemys
† Basirepomys
- † Basirepomys robertsi – type locality for species
† Bembidium
- † Bembidium exoletum – type locality for species
Bison
- † Bison latifrons – tentative report
† Bittacus
- † Bittacus egestionis – type locality for species
† Blickomylus
- † Blickomylus moroni – type locality for species
† Bootherium
- † Bootherium bombifrons
Fossilized skeleton of the Eocene crocodilian Boverisuchus
† Boverisuchus
- † Boverisuchus vorax – type locality for species
† Brachyhyops
- † Brachyhyops wyomingensis
Brachylagus
- † Brachylagus idahoensis – or unidentified comparable form
† Bridgeremys
- † Bridgeremys pusilla – tentative report
† Bunomeryx
- † Bunomeryx montanus – type locality for species

C

Life restoration of the Pliocene-Holocene camel Camelops
† Camelops
- † Camelops hesternus – or unidentified comparable form
Camponotus
- † Camponotus vetus – type locality for species
Canis
- † Canis latrans – tentative report
- † Canis lupus
† Capricamelus
† Carabites
- † Carabites eocenicus – type locality for species
- † Carabites exanimus – type locality for species
† Catopsalis
- † Catopsalis fissidens
† Cedrelospermum
- † Cedrelospermum nervosum
† Centetodon
- † Centetodon bembicophagus
- † Centetodon pulcher
Life restoration of the Late Cretaceous-Eocene choristoderan reptile Champsosaurus
† Champsosaurus
Chara
Cheilosia
- † Cheilosia scudderi
† Chipetaia
- † Chipetaia lamporea – type locality for species
† Chisternon
- † Chisternon undatum – type locality for species
† Chriacus
- † Chriacus baldwini
† Cicindelopsis – type locality for genus
- † Cicindelopsis eophilus – type locality for species
† Colodon
† Compsemys
- † Compsemys victa
† Conacodon
- † Conacodon kohlbergeri
† Coniatus
- † Coniatus refractus
† Conoryctella – type locality for genus
- † Conoryctella dragonensis – type locality for species
- † Conoryctella pattersoni
† Copemys
- † Copemys mariae – or unidentified related form
† Coryphodon
- † Coryphodon lobatus
† Cristadjidaumo – type locality for genus
- † Cristadjidaumo mckennai – type locality for species
Crocodylus
- Fossilized skull of the Eocene crocodilian Crocodylus acer
  † Crocodylus acer – type locality for species
- † Crocodylus affinis
† Crypholestes
Culex
- † Culex proavitus – type locality for species
† Cupidinimus
† Cuterebra
- † Cuterebra ascarides
† Cyttaromyia – type locality for genus
- † Cyttaromyia fenestrata – type locality for species

D

† Desmatoclaenus
- † Desmatoclaenus hermaeus
Dicranomyia
- † Dicranomyia primitiva – type locality for species
- † Dicranomyia rostrata – type locality for species
- † Dicranomyia stigmosa – type locality for species
Mounted fossilized skeleton of the Miocene-Pliocene horse Dinohippus
† Dinohippus
† Diplacodon
- † Diplacodon elatus
- † Diplacodon emarginatus – type locality for species
† Diplobunops
- † Diplobunops crassus
- † Diplobunops matthewi
† Diprionomys
- † Diprionomys minimus – or unidentified comparable form
† Dipsalidictis
- † Dipsalidictis transiens
† Draconodus
- † Draconodus apertus
† Dracontolestes
- † Dracontolestes aphantus – type locality for species
† Duchesnehippus
- † Duchesnehippus intermedius
† Duchesneodus
- † Duchesneodus uintensis

E

Fossilized shell of the Eocene turtle Echmatemys
† Echmatemys
- † Echmatemys depressa – type locality for species
- † Echmatemys douglassi – type locality for species
- † Echmatemys septaria – type locality for species
- † Echmatemys uintensis
† Ectoconus
- † Ectoconus ditrigonus
- † Ectoconus symbolus
† Ellipsodon
- † Ellipsodon grangeri
- † Ellipsodon lemuroides
- † Ellipsodon sternbergi – type locality for species
† Elliptio
Life restoration of a pair of the Eocene uintathere mammal Eobasileus . Charles R. Knight (1890s).
† Eobasileus
- † Eobasileus cornutus
† Eobracon – type locality for genus
- † Eobracon cladurus – type locality for species
† Eocaenonemonyx
- † Eocaenonemonyx kuscheli – type locality for species
† Eoconodon
† Eodiploglossus
- † Eodiploglossus borealis
† Eoformica
- † Eoformica pinguis – type locality for species
† Eomoropus
- † Eomoropus amarorum – type locality for species
- † Eomoropus anarsius
† Eonessa – type locality for genus
- † Eonessa anaticula – type locality for species
† Epicaerus
- † Epicaerus effossus
- † Epicaerus eradicatus
- † Epicaerus evigoratus
- † Epicaerus exanimis
- † Epicaerus subterraneus
- † Epicaerus terrosus
† Epihippus
- † Epihippus gracilis
† Epiphanis
- † Epiphanis deletus – type locality for species
† Epitriplopus
- † Epitriplopus uintensis
Equus
- † Equus conversidens – tentative report
Erethizon
- † Erethizon dorsatum – tentative report
† Eucastor
- † Eucastor tortus – or unidentified comparable form
Fossil of the Eocene bee Euglossopteryx
† Euglossopteryx – type locality for genus
- † Euglossopteryx biesmeijeri – type locality for species
Eutamias
- † Eutamias minimus

G

† Glyptosaurus
- † Glyptosaurus sylvestris
† Gnoriste
- † Gnoriste dentoni – type locality for species
† Goniacodon
- † Goniacodon hiawathae
† Griphomys

H

† Hadrianus
- † Hadrianus corsoni
- † Hadrianus utahensis – type locality for species
† Haplaletes
- † Haplaletes andakupensis
† Haploconus
- † Haploconus angustus
- † Haploconus elachistus
† Haplolambda – or unidentified comparable form
- † Haplolambda simpsoni – type locality for species
Fossilized skull of the mesonychian mammal Harpagolestes
† Harpagolestes
- † Harpagolestes brevipes – type locality for species
- † Harpagolestes leotensis – type locality for species
- † Harpagolestes uintensis
† Helaletes
- † Helaletes nanus
† Helodermoides – tentative report
† Heptacodon
† Herpetotherium
- † Herpetotherium innominatum
† Hesperolagomys
- † Hesperolagomys galbreathi
† Hessolestes
- † Hessolestes ultimus – type locality for species
† Heteraletes
- † Heteraletes leotanus
† Hoplochelys
Life restoration of the Eocene-Miocene creodont mammal Hyaenodon
† Hyaenodon
- † Hyaenodon vetus – or unidentified comparable form
Hydrobia – or unidentified comparable form
† Hylobius
- † Hylobius deleticius – type locality for species
† Hylomeryx
- † Hylomeryx annectens
- † Hylomeryx quadricuspis – type locality for species
† Hyopsodus
- † Hyopsodus minusculus
- † Hyopsodus paulus
- † Hyopsodus uintensis – type locality for species
† Hypohippus
† Hypolagus
- † Hypolagus vetus
† Hyrachyus
- † Hyrachyus eximius
- † Hyrachyus modestus
† Hyracodon
- † Hyracodon medius
† Hyracotherium
- † Hyracotherium vasacciense

I

† Isectolophus – type locality for genus
- † Isectolophus annectens – type locality for species

J

† Janimus
- † Janimus rhinophilus – type locality for species

K

† Kimbetohia
- † Kimbetohia campi

L

Laccophilus
† Lambdotherium
† Lasioptera
- † Lasioptera recessa – type locality for species
† Leistotrophus
- † Leistotrophus patriarchicus – type locality for species
Lemmiscus
- † Lemmiscus curtatus
Lepisosteus
- † Lepisosteus simplex
Life restoration of the Eocene-Oligocene even-toed ungulate Leptomeryx
† Leptomeryx
† Leptoreodon
- † Leptoreodon marshi
† Leptotragulus
- † Leptotragulus clarki
- † Leptotragulus medius – type locality for species
- † Leptotragulus proavus
Lepus
- † Lepus townsendii – or unidentified comparable form
† Limalophus
- † Limalophus compositus
- † Limalophus receptus – type locality for species
Top view of a fossilized skull of the Eocene creodont mammal Limnocyon
† Limnocyon
- † Limnocyon potens
- † Limnocyon verus – or unidentified comparable form
† Liodontia
† Lioplacoides – or unidentified comparable form
† Litaletes
- † Litaletes gazini
† Lithadothrips – type locality for genus
- † Lithadothrips vetusta – type locality for species
† Loxolophus
- † Loxolophus pentacus
- † Loxolophus spiekeri
A living Lynx
Lynx
- † Lynx canadensis – or unidentified comparable form

M

† Macrotarsius
- † Macrotarsius jepseni – type locality for species
† Mammut
- † Mammut americanum
† Mammuthus
- † Mammuthus columbi
- Life restorations of a Mammut americanum , or American mastodon (right), and a Mammuthus primigenius , or wooly mammoth (left)
  † Mammuthus primigenius
Marsilea ^[1]
- † Marsilea sprungerorum ^[1]
† Megalamynodon
- † Megalamynodon regalis – type locality for species
† Megalonyx
- † Megalonyx jeffersonii
† Menops
- † Menops marshi
† Merriamoceros
† Mesomeryx – type locality for genus
- † Mesomeryx grangeri – type locality for species
Life restoration of the Eocene mammal Mesonyx
† Mesonyx
- † Mesonyx obtusidens
† Metaliomys – type locality for genus
- † Metaliomys sevierensis – type locality for species
† Metanoiamys
- † Metanoiamys lacus
† Metarhinus
- † Metarhinus diploconus
- † Metarhinus fluviatilis – type locality for species
- † Metarhinus parvus
† Metatelmatherium
- † Metatelmatherium ultimum – type locality for species
Life restoration of the Paleocene-Eocene mammal Miacis
† Miacis
- † Miacis parvivorus – or unidentified comparable form
† Microparamys
- † Microparamys dubius
- † Microparamys minutus
† Micropternodus
† Microsyops
Microtus
- † Microtus montanus
- † Microtus paroperarius
Mictomys
- † Mictomys borealis
† Mimomys
- † Mimomys dakotaensis – or unidentified comparable form
† Mimotricentes
† Miocyon
- † Miocyon major – or unidentified comparable form
- † Miocyon scotti – type locality for species
- † Miocyon vallisrubrae – type locality for species
Mustela
- † Mustela richardsonii – tentative report
† Myrmecoboides
† Mytonolagus
- † Mytonolagus petersoni – type locality for species
† Mytonomeryx
- † Mytonomeryx scotti – type locality for species
† Mytonomys
- † Mytonomys mytonensis
- † Mytonomys robustus – type locality for species

N

A living Neogale vison, or American mink MinkforWiki.jpg — A living *Neogale vison* , or American mink

† Nemotelus
- † Nemotelus eocenicus – type locality for species
Neogale
- † Neogale vison
† Neoplagiaulax
- † Neoplagiaulax macintyrei
Neoptochus – tentative report
Neotamias
Neotoma
† Notharctus
- Mounted fossilized skeleton of the Eocene primate Notharctus tenebrosus
  † Notharctus tenebrosus – or unidentified comparable form
† Nyctitherium
- † Nyctitherium serotinum

O

A living Odocoileus deer
Odocoileus
† Oliveremys
- † Oliveremys uintaensis
† Omomys
- † Omomys carteri
- † Omomys lloydi – type locality for species
Ondatra
† Onychodectes
- † Onychodectes tisonensis – or unidentified comparable form
† Oodectes – tentative report
Ophryastes
- † Ophryastes petrarum
† Ophryastites
- † Ophryastites digressus – type locality for species
† Orelladjidaumo – or unidentified comparable form
† Oromeryx
- † Oromeryx plicatus – type locality for species
† Ourayia
- † Ourayia hopsoni
- † Ourayia uintensis – type locality for species
† Oxyacodon
- † Oxyacodon apiculatus
- † Oxyacodon ferronensis – type locality for species
- † Oxyacodon marshater – type locality for species
† Oxyaenodon
- † Oxyaenodon dysodus
† Oxyclaenus
- † Oxyclaenus pugnax
† Oxygonus
- † Oxygonus mortuus – type locality for species
† Oxytomodon
- † Oxytomodon perissum

P

† Pachymerus
- † Pachymerus petrensis – type locality for species
† Paenemarmota
- † Paenemarmota sawrockensis
† Palaeictops
- † Palaeictops bridgeri
† Palaeoeristalis – type locality for genus
- † Palaeoeristalis tesselatus – type locality for species
† Palaeothrips – type locality for genus
- † Palaeothrips fossilis – type locality for species
† Palaeoxantusia
† Pantolestes
- † Pantolestes longieundus – or unidentified comparable form
† Paradjidaumo
- † Paradjidaumo alberti – or unidentified comparable form
- † Paradjidaumo trilophus
Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
† Paramylodon
- † Paramylodon harlani – or unidentified comparable form
† Paramys
- † Paramys compressidens – type locality for species
- † Paramys delicatus
- † Paramys leptodus
† Parasauromalus
- † Parasauromalus olseni
† Parectypodus
† Pareumys
- † Pareumys grangeri
- † Pareumys guensburgi – type locality for species
- † Pareumys milleri – type locality for species
- † Pareumys troxelli
† Paromomys
- † Paromomys depressidens
† Paronychomys
- † Paronychomys lemredfieldi
† Paropsocus – type locality for genus
- † Paropsocus disjunctus – type locality for species
† Passaliscomys – type locality for genus
- † Passaliscomys priscus – type locality for species
† Pauromys
† Penetrigonias
- † Penetrigonias dakotensis
† Pentacemylus
- † Pentacemylus leotensis
- † Pentacemylus progressus – type locality for species
† Peradectes
- † Peradectes chesteri
Fossilized mandible of the Eocene-Miocene mammal Peratherium
† Peratherium
- † Peratherium marsupium
† Periptychus
- † Periptychus carinidens
- † Periptychus coarctatus
Peromyscus
- † Peromyscus maniculatus
Phenacomys
- † Phenacomys gryci – or unidentified comparable form
- † Phenacomys intermedius
† Phygadeuon
- † Phygadeuon petrifactellus – type locality for species
Phyllobius
- † Phyllobius avus
- † Phyllobius carcerarius
† Phyllophaga
- † Phyllophaga avus – type locality for species
Physa
Picea
A living Pinus , or pine tree
Pinus
† Plastomenoides
- † Plastomenoides lamberti
† Plastomenus
Plecia
- † Plecia woodruffi – type locality for species
† Plesiolestes
- † Plesiolestes nacimienti
† Poabromylus
- † Poabromylus kayi – type locality for species
† Poebrodon
- † Poebrodon kayi – type locality for species
† Polemonium – or unidentified comparable form
† Presbyorniformipes
- † Presbyorniformipes feduccii – type locality for species
Life restoration of the Paleocene-Eocene waterfowl Presbyornis
† Presbyornis – type locality for genus
- † Presbyornis pervetus – type locality for species
- † Presbyornis recurvirostrus – type locality for species
† Procaimanoidea – type locality for genus
- † Procaimanoidea kayi
- † Procaimanoidea utahensis – type locality for species
† Procas
- † Procas vinculatus
† Procynodictis
- † Procynodictis vulpiceps
† Prodaphaenus
- † Prodaphaenus uintensis – type locality for species
† Promioclaenus
† Pronophlebia – type locality for genus
- † Pronophlebia rediviva – type locality for species
† Propalaeosinopa – tentative report
† Protadjidaumo
- † Protadjidaumo typus – type locality for species
† Protictis
- † Protictis haydenianus
Restorative models in multiple views of the Eocene brontothere Protitanotherium (figure 3)
† Protitanotherium
† Protochriacus
- † Protochriacus simplex
† Protoptychus
- † Protoptychus hatcheri
† Protoreodon
- † Protoreodon minor – type locality for species
- † Protoreodon parvus
- † Protoreodon petersoni – type locality for species
- † Protoreodon pumilus – type locality for species
† Protoselene
- † Protoselene griphus
Illustration of a fossilized skull of the Eocene camel Protylopus
† Protylopus
- † Protylopus annectens – type locality for species
- † Protylopus petersoni
Fossilized skeleton of the Eocene creodont mammal Proviverra
† Proviverra
- † Proviverra longipes
† Proviverroides
- † Proviverroides piercei – or unidentified comparable form
† Proxestops – or unidentified comparable form
- † Proxestops silberlingii
† Pseudodiplacodon
† Pseudosalix – type locality for genus
- † Pseudosalix handleyi – type locality for species
† Pseudotomus
- † Pseudotomus eugenei – type locality for species
- † Pseudotomus petersoni – type locality for species
Illustration of a fossilized skull of the Paleocene multituberculate mammal Ptilodus
† Ptilodus
- † Ptilodus mediaevus
- † Ptilodus tsosiensis – or unidentified comparable form

R

† Reithroparamys
- † Reithroparamys sciuroides – type locality for species
A living Rhinoclemmys , or Neotropical wood turtle
Rhinoclemmys – report made of unidentified related form or using admittedly obsolete nomenclature

S

Fossilized skeleton of the Eocene monitor lizard Saniwa
† Saniwa
- † Saniwa ensidens
† Sargus
- † Sargus vetus – type locality for species
† Scenopagus
- † Scenopagus edenensis
- † Scenopagus priscus
† Sciuravus
- † Sciuravus altidens – type locality for species
- † Sciuravus eucristadens
- † Sciuravus popi – type locality for species
† Simidectes – type locality for genus
- † Simidectes magnus – type locality for species
- † Simidectes medius – type locality for species
† Simimeryx
- † Simimeryx minutus
† Simimys – or unidentified comparable form
† Sinopa
- † Sinopa agilis
- † Sinopa major
- † Sinopa rapax
† Smilodectes
- † Smilodectes gracilis
Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
† Smilodon
- † Smilodon fatalis – or unidentified comparable form
Sorex
- † Sorex palustris
Spermophilus
- † Spermophilus armatus – or unidentified comparable form
† Sphenocoelus
- † Sphenocoelus hyognathus
† Sthenodectes
- † Sthenodectes incisivum – type locality for species
† Stygimys
- † Stygimys kuszmauli
† Stylemys
- † Stylemys uintensis – type locality for species
Life restoration of the Eocene taeniodont mammal Stylinodon mirus
† Stylinodon
- † Stylinodon mirus
† Syntomostylus
- † Syntomostylus rudis

T

Restoration of the Paleocene multituberculate mammal Taeniolabis
† Taeniolabis
- † Taeniolabis taoensis
† Talpavus
- † Talpavus duplus – type locality for species
- † Talpavus nitidus
† Tapocyon
- † Tapocyon robustus
Taxidea
- † Taxidea taxus
† Thisbemys
- † Thisbemys medius
- † Thisbemys uintensis – type locality for species
Thomomys
- † Thomomys talpoides
† Tilgidopsis – type locality for genus
- † Tilgidopsis haesitans – type locality for species
Tinosaurus
- † Tinosaurus stenodon
† Tricentes
- † Tricentes subtrigonus – type locality for species
† Triplopus
- † Triplopus implicatus
- † Triplopus obliquidens
- † Triplopus rhinocerinus – type locality for species
† Trogosus
† Tylocephalonyx

U

† Uintaceras
- † Uintaceras radinskyi – type locality for species
† Uintacyon
- † Uintacyon acutus – type locality for species
† Uintanius
- † Uintanius ameghini
† Uintasorex
- † Uintasorex parvulus – or unidentified comparable form
Life restoration of the Eocene mammal Uintatherium
† Uintatherium
† Utahia
- † Utahia kayi – type locality for species

V

† Valenia
- † Valenia wilsoni
† Viverravus
- † Viverravus gracilis
- † Viverravus minutus
- † Viverravus sicarius
Viviparus
Vulpes
- A living Vulpes vulpes , or red fox
  † Vulpes vulpes

X

† Xestops
- † Xestops vagans
† Xylotosyrphus – type locality for genus
- † Xylotosyrphus pulchrafenestra – type locality for species

Z

A living Zapus jumping mouse
Zapus
† Zionodon – type locality for genus
- † Zionodon satanus – type locality for species
- † Zionodon walshi – type locality for species

References

1 2 Elizabeth J. Hermsen (2019). "Revisions to the fossil sporophyte record of Marsilea". Acta Palaeobotanica. 59 (1): 27–50. doi: 10.2478/acpa-2019-0005 .

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 7 August 2017.

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[hermsen-2019-1] 1 2 Elizabeth J. Hermsen (2019). "Revisions to the fossil sporophyte record of Marsilea". Acta Palaeobotanica. 59 (1): 27–50. doi: 10.2478/acpa-2019-0005 .

[1]

List of the Cenozoic life of Utah

Contents

A

B

C

D

E

G

H

I

J

K

L

M

N

O

P

R

S

T

U

V

X

Z

References