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

A

• 

  Living Abies, or fir trees
  Abies
  • †Abies alvordensis
  • †Abies concoloroides
  • †Abies conncoloroides
  • †Abies idahoensis – type locality for species
  • †Abies klamathensis
  • †Abies sonomensis
  • †Abies toxirivus
• Acer
  • †Acer bendirei
  • †Acer bolanderi
  • †Acer columbianum
  • †Acer florissanti
  • †Acer glabroides
  • †Acer hueberi
  • †Acer idahoensis
  • †Acer macginitiei
  • †Acer minor
  • †Acer oregonianum
  • †Acer salmonensis
  • †Acer scottiae
  • †Acer tiffneyi
• †Acritohippus
  • †Acritohippus isonesus
• 

  Life restoration of the Miocene camel Aepycamelus, or the long-necked camel. Heinrich Harder (1920).
  †Aepycamelus
• †Aesculus
  • †Aesculus montanus
• Agelaius
  • †Agelaius phoeniceus
• †Agriotherium
  • †Agriotherium schneideri – or unidentified comparable form
• †Alforjas – tentative report
• †Alilepus
  • †Alilepus vagus – type locality for species
• Alnus
  • †Alnus carpinoides
  • †Alnus fairii
  • †Alnus fossilis
  • †Alnus hollandiana
  • †Alnus latahensis
  • †Alnus lemhiensis – type locality for species
  • †Alnus relatus
  • †Alnus rossi
• †Alphagaulus
  • †Alphagaulus pristinus
• 

  Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932).
  †Amebelodon
  • †Amebelodon floridanus – or unidentified comparable form
• Amelanchier
  • †Amelanchier couleeana
  • †Amelanchier dignatus
• Anas
  • †Anas platyrhynchos
• Anser
  • †Anser caerulescens
• Antilocapra
  • †Antilocapra americana
• Antrozous
  • †Antrozous pallidus
• †Aphelops
  • †Aphelops malacorhinus – or unidentified comparable form
• †Archaeohippus
  • †Archaeohippus ultimus
• †Arctodus
  • †Arctodus simus
• Ardea
  • †Ardea herodias

B

• Baiomys
  • †Baiomys aquilonius – type locality for species
• Betula
  • †Betula ashleyi
  • †Betula lemhiensis – type locality for species
  • †Betula thor
  • †Betula vera
• Bibio
  • †Bibio latahensis – type locality for species
  • †Bibio testeus – type locality for species
• Bison
  • †Bison alaskensis
  • †Bison antiquus – or unidentified comparable form
  • 

    Mounted fossilized skeleton of the Pleistocene Bison latifrons, also known as the giant bison or long-horned bison
    †Bison latifrons
  • †Bison priscus
• Boletina
• †Bolitophila
  • †Bolitophila pulveris – type locality for species
• †Bombus
  • †Bombus proavus – tentative report
• Bonasa
  • †Bonasa umbellus
• †Bootherium
  • †Bootherium bombifrons
• †Borophagus
  • †Borophagus diversidens
  • †Borophagus hilli
  • †Borophagus pugnator
• 

  Restorative portrait of the Miocene oreodont mammal Brachycrus
  †Brachycrus
• Brachylagus
  • †Brachylagus idahoensis
• Branta
  • †Branta canadensis
• Bucephala
• †Buisnictis
  • †Buisnictis breviramus

C

• 

  Life restoration of the Pliocene-Holocene camel Camelops
  †Camelops
  • †Camelops hesternus
• Camponotus
• Canis
  • †Canis dirus
  • †Canis ferox
  • †Canis latrans
  • †Canis lepophagus
• Carya
  • †Carya benderei
  • †Carya bendrerei
  • †Carya libbeyi
• Castor
  • †Castor californicus
  • †Castor canadensis
• Ceanothus
  • †Ceanothus chaneyi
• Cedrela
  • †Cedrela pteraformis
• †Ceratomeryx – type locality for genus
  • †Ceratomeryx prenticei – type locality for species
• Cercidiphyllum
  • †Cercidiphyllum crenatum
  • †Cercidiphyllum elongatum
• Cervus
  • †Cervus elaphus – or unidentified comparable form
• †Chamaecyparis
  • †Chamaecyparis edwardsii – type locality for species
  • †Chamaecyparis linguaefolia
• Chen
  • †Chen pressa – type locality for species
• †Chrysolepis
  • †Chrysolepis haynesii – type locality for species
• Ciconia – tentative report
  • 

    Mounted fossilized skeleton of the Pliocene-Pleistocene Ciconia maltha, also known as the asphalt stork or La Brea stork
    †Ciconia maltha
• Colymbus
• Comptonia
  • †Comptonia hesperia
• †Conites – tentative report
• †Copemys – tentative report
• Cornus
  • †Cornus ovalis
• †Cosomys
  • †Cosomys primus
• †Cosoryx
• Craigia
  • †Craigia oregonensis
• Crataegus
  • †Crataegus bakeri – type locality for species
  • †Crataegus flavescens
  • †Crataegus haynesii – type locality for species
• †Cunninghamia
  • †Cunninghamia marquettii – type locality for species
• Cygnus
  • †Cygnus hibbardi – type locality for species
• Cynomys
  • †Cynomys niobrarius
• †Cynorca

D

• †Dennstaedtia
  • †Dennstaedtia americana
• †Diceratherium
  • †Diceratherium niobrarense
• †Diplodipelta
  • †Diplodipelta reniptera
• †Dipoides
  • †Dipoides stirtoni
• Dolichoderus
• †Domnina
• 

  Fossilized horns, jaws, and limb bones of the Miocene deer relative Dromomeryx
  †Dromomeryx
• Dytiscus
  • †Dytiscus miocenicus – type locality for species

E

• Elaphe
  • †Elaphe pliocenica – type locality for species
  • †Elaphe vulpina
• †Entoptychus
  • †Entoptychus fieldsi
  • †Entoptychus sheppardi
• †Eotermes
• 

  Mounted fossilized skeleton of the Miocene bone-crushing dog Epicyon
  †Epicyon
  • †Epicyon haydeni
• †Equisetum
  • †Equisetum alexanderi
  • †Equisetum arcticum – or unidentified comparable form
  • †Equisetum octangulatum
• Equus
  • †Equus fromanius
  • †Equus idahoensis
  • †Equus scotti
  • 

    Fossilized skeleton of the Pliocene-Pleistocene horse Equus simplicidens, also known as the Hagerman horse or American zebra
    †Equus simplicidens
• Erethizon
  • †Erethizon bathygnathum
  • †Erethizon dorsatum
• †Eucommia
  • †Eucommia serrata
• †Euptelea
  • †Euptelea dilcherii – type locality for species
• Exechia
  • †Exechia juliaetta – type locality for species

F

• Falco
  • †Falco peregrinus
• Felis
  • †Felis lacustris
  • †Felis rexroadensis
• †Ferinestrix
  • †Ferinestrix vorax – type locality for species
• 

  Illustrations of the flowers and foliage of a living Fraxinus, or ash tree, with insets further detailing its anatomy
  †Fraxinus
  • †Fraxinus coulteri
  • †Fraxinus stenocarpa – type locality for species

G

• Gallinula
  • †Gallinula chloropus
• †Garrya
  • †Garrya idahoensis
• †Gigantocamelus
  • †Gigantocamelus spatulus
• Ginkgo
  • 

    Restored foliage of the Late Cretaceous-Miocene ginkgo tree Ginkgo adiantoides
    †Ginkgo adiantoides
• †Gleditsia
  • †Gleditsia lottii – type locality for species

H

• Halesia
  • †Halesia columbiana
• †Hemiauchenia
  • †Hemiauchenia macrocephala
• Homo
  • †Homo sapiens
• 

  Restoration of Pliocene-Pleistocene Homotherium, or scimitar cat
  †Homotherium
  • †Homotherium idahoensis
  • †Homotherium serum
• Hydrangea
  • †Hydrangea bendirei
• †Hypohippus
• †Hypolagus
  • †Hypolagus edensis
  • †Hypolagus furlongi
  • †Hypolagus gidleyi
  • †Hypolagus vetus
  • †Hypolagus voorhiesi

I

• 

  Foliage and fruit of a living Ilex, or holly
  Ilex
  • †Ilex idahoensis

J

• Juglans
  • †Juglans browniana

L

• Larix
  • †Larix cassiana
  • †Larix lemhiensis – type locality for species
• 

  A living Lasiurus, or hairy-tailed bat
  Lasiurus
  • †Lasiurus fossilis
• Lasius
• †Ledum
  • †Ledum idahoensis – type locality for species
• Lepus
• Libocedrus
  • †Libocedrus masoni
• †Limnephilus
• †Liriodendron
  • †Liriodendron hesperia
• †Lithocarpus
  • †Lithocarpus weidei
• Lontra
  • †Lontra canadensis
  • †Lontra weiri – type locality for species
• 

  A living Lynx
  Lynx
  • †Lynx canadensis
  • †Lynx rufus

M

• †Macrophya
  • †Macrophya adventitia – type locality for species
• Mahonia
  • †Mahonia creedensis
  • †Mahonia reticulata
  • †Mahonia simplex
• †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
  • †Mammuthus hayi
• †Martinogale
• †Megacamelus
• †Megaleuctra
  • †Megaleuctra jewetti – type locality for species
• †Megalonyx
  • †Megalonyx jeffersonii
  • †Megalonyx leptostomus
• †Megantereon
  • †Megantereon hesperus
• Meleagris
  • †Meleagris gallopavo
• Mergus
  • †Mergus merganser
• †Merychyus
  • †Merychyus elegans
  • †Merychyus smithi
• †Mesoreodon
  • †Mesoreodon chelonyx
• Messor – tentative report
• †Metalopex
  • †Metalopex merriami
• Metasequoia
  • †Metasequoia occidentalis
• †Michenia
• Mictomys
  • †Mictomys vetus
• †Mimomys
• 

  Fossilized skull of the Eocene-Oligocene three-toed horse Miohippus
  †Miohippus
  • †Miohippus gemmarosae – or unidentified comparable form
• †Miolabis – tentative report
• †Miopsyche
• Mustela
  • †Mustela rexroadensis

N

• Natrix
  • †Natrix hibbardi – type locality for species
• 

  Mounted fossilized skeleton of the Miocene Neophrontops
  Neophrontops
  • †Neophrontops slaughteri – type locality for species
• Neotoma
  • †Neotoma quadriplicata – or unidentified comparable form
• †Neotragocerus
  • †Neotragocerus lindgreni – type locality for species
• †Niglarodon
  • †Niglarodon petersonensis
  • †Niglarodon yeariani
• †Nymphaeites
  • †Nymphaeites nevadensis
• †Nyssa
  • †Nyssa hesperia

O

• 

  A living Odocoileus deer
  Odocoileus
• Ondatra
  • †Ondatra idahoensis – type locality for species
  • †Ondatra minor
  • †Ondatra zibethicus
• †Ophiomys
  • †Ophiomys parvus – type locality for species
  • †Ophiomys taylori
• †Oregonomys
  • †Oregonomys magnus
  • †Oregonomys pebblespringsensis – or unidentified comparable form
• †Oreolagus
• †Osmunda
  • †Osmunda occidentale
  • †Osmunda occidentalis
• Ostrya
  • †Ostrya oregoniana
• 

  Mounted fossilized skeleton of the Oligocene-Miocene camel Oxydactylus
  †Oxydactylus

P

• †Paciculus
  • †Paciculus montanus
• †Paenemarmota
  • †Paenemarmota barbouri
  • †Paenemarmota sawrockensis
• †Palaeolagus – tentative report
• Panthera
  • †Panthera leo
• †Paracryptotis
  • †Paracryptotis gidleyi
• †Paramicrotoscoptes
  • †Paramicrotoscoptes hibbardi
• 

  Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
  †Paramylodon
  • †Paramylodon harlani
• †Paratamias – type locality for genus
  • †Paratamias tarassus – type locality for species
• †Parthenocissus
  • †Parthenocissus idahoensis
• Pelecanus
  • †Pelecanus halieus – type locality for species
• Perognathus
  • †Perognathus maldei – type locality for species
• Peromyscus
  • †Peromyscus hagermanensis – type locality for species
• Persea
  • †Persea pseudocarolinensis
• Phalacrocorax
  • 

    A living Phalacrocorax auritus, or double-crested cormorant
    †Phalacrocorax auritus
  • †Phalacrocorax idahensis
  • †Phalacrocorax macer – type locality for species
• Phenacomys
  • †Phenacomys gryci
• Phryganea
• Picea
  • †Picea coloradensis
  • †Picea lahontense
  • †Picea magna
  • †Picea sonomensis
• Pinus
  • †Pinus alvordensis
  • †Pinus baileyii – type locality for species
  • †Pinus harneyana
  • †Pinus ponderosoides
  • †Pinus prestrobus – type locality for species
  • †Pinus wheeleri
• Platanus
  • †Platanus idahoensis – type locality for species
• 

  Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).
  †Platygonus
  • †Platygonus pearcei – type locality for species
• †Plesiosorex
  • †Plesiosorex coloradensis – or unidentified comparable form
• †Pliogeomys
  • †Pliogeomys parvus – type locality for species
• †Pliophenacomys
  • †Pliophenacomys meadensis
  • †Pliophenacomys osborni
• †Pliosaccomys
• †Pliotaxidea
  • †Pliotaxidea nevadensis – or unidentified comparable form
• Populus
  • †Populus cinnamonoides
  • †Populus eotremuloides
• Porzana
  • †Porzana lacustris – type locality for species
• †Potamogeton
  • †Potamogeton knowltoni
• †Problastomeryx
  • †Problastomeryx primus
• †Procastoroides
  • †Procastoroides idahoensis
  • †Procastoroides intermedius
• Procyon
  • †Procyon lotor
• †Prodipodomys
  • †Prodipodomys idahoensis – type locality for species
• 

  Restoration of the Miocene hippopotamus-like oreodont Promerycochoerus both onshore and in the water. Robert Bruce Horsfall (1913).
  †Promerycochoerus
  • †Promerycochoerus superbus
• †Propentacora
  • †Propentacora froeschneri – type locality for species
• †Protolabis
• Prunus
  • †Prunus chaneyi
  • †Prunus treasheri
• †Pseudofagus – type locality for genus
  • †Pseudofagus idahoensis – type locality for species
• †Pseudolarix
  • †Pseudolarix americana
  • †Pseudolarix americcana
• †Pseudotsuga
  • †Pseudotsuga glaucoides
  • †Pseudotsuga longifolia
• Pterocarya
  • †Pterocarya mixta
• Puma
  • †Puma concolor

Q

• 

  A living Quercus, or oak tree
  Quercus
  • †Quercus bilobata – type locality for species
  • †Quercus castormontis – type locality for species
  • †Quercus hannibali
  • †Quercus haynesii – type locality for species
  • †Quercus mccanni
  • †Quercus moyei – type locality for species
  • †Quercus simulata
  • †Quercus snookensis – type locality for species
• Querquedula

R

• Rangifer
  • †Rangifer tarandus
• †Rhamnus
  • †Rhamnus columbiana
• Rhododendron
  • †Rhododendron chaneyi
• Rhus
  • †Rhus alvordensis
• 

  Restoration of the Miocene-Pliocene elephant relative Rhynchotherium
  †Rhynchotherium
• †Ribes
• Rosa
  • †Rosa germerensis
• †Rymosia
  • †Rymosia miocenica – type locality for species

S

• Salix
  • †Salix cassiana
  • †Salix hesperia
  • †Salix knowltoni
  • †Salix lemhiensis – type locality for species
• Sassafras
  • †Sassafras ashleyi
  • †Sassafras columbiana
• †Satherium
  • †Satherium piscinarium
• Scapanus
  • †Scapanus hagermanensis – type locality for species
  • †Scapanus proceridens – or unidentified comparable form
  • †Scapanus townsendii – or unidentified related form
• Sciara
  • †Sciara sepulta – type locality for species
• Sequoia
  • †Sequoia affinis
• †Sequoiadendron
  • †Sequoiadendron chaneyi
• †Simocyon
  • †Simocyon primigenius – or unidentified comparable form
• †Smilax
  • †Smilax trinervis – or unidentified comparable form
• 

  Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
  †Smilodon
  • †Smilodon fatalis
• †Sminthosinis
  • †Sminthosinis bowleri – type locality for species
• †Sophora
  • †Sophora spokanensis
• †Sorbus
  • †Sorbus cassiana
  • †Sorbus mcjannetii
• Sorex
  • †Sorex hagermanensis – type locality for species
  • †Sorex meltoni – type locality for species
  • †Sorex palustris
  • †Sorex powersi – type locality for species
  • †Sorex rexroadensis – or unidentified comparable form
• Spermophilus
  • †Spermophilus gidleyi
• Sphecophaga – tentative report
• †Spiraea
  • †Spiraea idahoensis – type locality for species
• 

  Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon
  †Stegomastodon
  • †Stegomastodon mirificus
• Sthenictis
• Sylvicola
  • †Sylvicola carolae – type locality for species
• †Symphoricarpos
  • †Symphoricarpos salmonense
  • †Symphoricarpos salmonensis

T

• Taxidea
  • †Taxidea taxus
• Taxodium
  • †Taxodium dubium
• 

  Restoration of the Miocene-Pliocene rhinoceros Teleoceras
  †Teleoceras
• Thamnophis
• Thomomys
  • †Thomomys gidleyi
  • †Thomomys townsendii
• †Thuja
  • †Thuja dimorpha
• †Ticholeptus
  • †Ticholeptus zygomaticus
• Tilia
  • †Tilia circularis
  • †Tilia hallii
• †Trigonictis
  • †Trigonictis cookii
  • †Trigonictis macrodon
• †Trilaccogaulus
  • †Trilaccogaulus lemhiensis
• †Tsuga
  • †Tsuga mertensioides
• Typha
  • †Typha lesquereuxi

U

• 

  A living Ulmus, or elm
  Ulmus
  • †Ulmus knowltoni
  • †Ulmus moorei
  • †Ulmus paucidentata
  • †Ulmus speciosa
• †Ungnadia
  • †Ungnadia clarki
• Ursus
  • †Ursus abstrusus – type locality for species

V

• 

  A variety of modern Vaccinium species, clockwise from top right: cranberries, lingonberries, blueberries, and huckleberries
  †Vaccinium
  • †Vaccinium sonomensis
• †Vauquelinia
• Vulpes
  • †Vulpes vulpes

Z

• Zelkova
  • †Zelkova brownii
  • †Zelkova oregoniana

References

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