This list of the prehistoric life of Idaho contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Idaho.
Paleozoic
Selected Paleozoic taxa of Idaho
- †Acrothyra
- †Adrianites
†AgnostusAssemblage of fossils of the Cambrian trilobite Agnostus - †Amplexus
- † Ananias
- Archaeolithophyllum
- †Atrypa
- †Aulopora
- †Aviculopecten
- †Aviculopecten kaibabensis – or unidentified comparable form
- † Avonia
- †Bathyuriscus
- †Benthamaspis
- †Caninia
- †Cardiograptus
- †Chancia
- †Chonetes
- †Cleiothyridina
†ClimacograptusAssemblage of fossils of the Cambrian graptolite Climacograptus - †Climacograptus bicornis
- †Climacograptus innotatus
- †Climacograptus scalaris – or unidentified comparable form
- †Composita
- †Composita humilis
- †Composita idahoensis – type locality for species
- †Composita mira – or unidentified comparable form
- †Composita sigma
- †Composita subquadrata
- †Composita subtilita – or unidentified comparable form
- †Composita sulcata
- †Cyrtograptus
- †Cystodictya
- †Dictyonema
- †Didymograptus
- †Diplograptus
- †Edmondia
- †Ehmaniella
- †Elrathia
- †Elrathina
- †Euomphalus
- †Fenestella
- †Gastrioceras – report made of unidentified related form or using admittedly obsolete nomenclature
- †Girvanella
- †Gogia
- †Goniograptus
- †Haplophrentis
- †Helcionella
†HelicoprionLife restoration of the Permian Chimaera relative Helicoprion - †Helicoprion davisii – type locality for species
- †Hintzeia
- †Hyolithes
- †Isograptus
- †Kazakhstania
- †Kootenia
- †Lingula
- †Lingulella
- †Lithostrotion
- †Margaretia
- †Martinia
- †Micromitra
- †Monograptus
- †Morania
- †Naticopsis
- †Neospirifer
- †Niobe – tentative report
- †Obolus
- †Ogygopsis
†OlenoidesFossil of the Cambrian trilobite Olenoides - †Orthotheca
- †Oryctocephalus
- †Pagetia
- Palaeoaplysina
- †Paterina
- †Pelagiella
- †Peronopsis
- †Phyllograptus
- †Plaesiomys
- †Platyceras
- †Platycrinites
- †Platystrophia
- †Poulsenia
- †Prodentalium
†ProetusRestoration of the Silurian trilobite Proetus - †Protopliomerella
- †Protospongia
- †Quadratia
- †Selkirkia
- †Siphonodendron
- †Spirifer
- †Spiriferina
- †Strophomena
†SyringoporaFossil of the Devonian tabulate coral Syringopora - †Tetragraptus
- †Tetrataxis
- †Thoracocare
- †Urotheca
- †Wilkingia
- †Worthenia – tentative report
- †Zacanthoides
Mesozoic
Selected Mesozoic taxa of Idaho
- †Albanites
- †Anaflemingites
- †Anasibirites
- †Anemia
†Arcestes – tentative reportLife restoration of two species of the Late Triassic ammonoid cephalopod Arcestes - †Arctomeekoceras
- †Aspenites
- Astarte
- †Aviculopecten – report made of unidentified related form or using admittedly obsolete nomenclature
- †Aviculopecten altus – type locality for species
- †Aviculopecten idahoensis
- †Aviculopecten pealei – type locality for species
- †Carteria – type locality for genus
- †Ceccaisculitoides
- Chlamys
- †Claraia
- Corbicula
- †Cryptaulax
- †Cycadeoidea
†CymbospondylusDiagram illustrating the Middle-Late Triassic ichthyosaur Cymbospondylus with an anachronistic human to scale. - †Dagnoceras
- †Dennstaedtia – tentative report
- †Enoploceras
- †Flemingites
- †Germanonautilus
- †Gervillia – report made of unidentified related form or using admittedly obsolete nomenclature
- Gleichenia
- †Gryphaea
- †Grypoceras
- †Hedenstroemia
†InoceramusFossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size - †Inyoites
- †Lecanites
- †Lingula
- Lopha
- †Meekoceras
- †Meekoceras gracilitatis – type locality for species
- †Megasphaeroceras
- †Naticopsis – tentative report
- †Nemacanthus
- †Nemacanthus elegans – type locality for species
- †Neogondolella
- †Neospathodus
- †Nerinea
†NormannitesFossilized shell of the Middle Jurassic ammonoid cephalopod Normannites - †Orthoceras
- Ostrea
- †Owenites
- †Owenites koeneni – or unidentified comparable form
- †Pagiophyllum
- †Palaeophyllites – tentative report
- †Phaedrysmocheilus
- Pholadomya
- †Plagiostoma
- †Platymya
†PleuronautilusFossilized shell of the Carboniferous-Triassic nautiloid cephalopod Pleuronautilus - †Protocardia
- †Pseudomelania – tentative report
- †Pteria – tentative report
- †Rhaetina
- †Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature
- †Saurichthys
- †Spiriferina
- †Stephanoceras
- †Tempskya
†TenontosaurusLife restoration of the Early Cretaceous Iguanodon relative Tenontosaurus - †Thamnasteria
- †Trigonia
- †Ussuria
- †Ussurites
- †Vex – type locality for genus
- †Worthenia
- †Wyomingites – type locality for genus
- †Xenoceltites
†XenodiscusFossilized shells of the ammonoid cephalopod Xenodiscus
Cenozoic
Selected Cenozoic taxa of Idaho
- Abies
- Acer
- †Acritohippus
- †Aepycamelus
- †Aesculus
- Agelaius
- †Agriotherium
- †Alforjas – tentative report
- Alnus
†AmebelodonLife restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932). - Amelanchier
- Anas
- Anser
- Antilocapra
- Antrozous
- †Aphelops
- †Archaeohippus
- †Arctodus
- Ardea
- Baiomys
- Betula
- Bibio
- Bison
- †Bison antiquus – or unidentified comparable form
†Bison latifronsMounted fossilized skeleton of the Pleistocene Bison latifrons, also known as the giant bison or long-horned bison - †Bison priscus
- Boletina
- †Bolitophila
- †Bombus
- Bonasa
- †Bootherium
- †Borophagus
†BrachycrusRestorative portrait of the Miocene oreodont mammal Brachycrus - Brachylagus
- Branta
- Bucephala
- †Camelops
- Camponotus
- Canis
CaryaA living Carya, or hickory tree - Castor
- Ceanothus
- Cedrela
- Cercidiphyllum
- Cervus
- †Cervus elaphus – or unidentified comparable form
- †Chamaecyparis
- Chen
- †Chrysolepis
- Ciconia – tentative report
†Ciconia malthaMounted fossilized skeleton of the Pliocene-Pleistocene Ciconia maltha, also known as the asphalt stork or La Brea stork
- Comptonia
- Cornus
- †Cosoryx
- Craigia
- Crataegus
- †Cunninghamia
- Cygnus
- Cynomys
- †Dennstaedtia
- †Diceratherium
- †Dipoides
- Dolichoderus
- †Domnina
- †Dromomeryx
- Dytiscus
- Elaphe
- †Epicyon
- †Equisetum
- Equus
- †Equus idahoensis
- †Equus scotti
†Equus simplicidensFossilized skeleton of the Pliocene-Pleistocene horse Equus simplicidens, also known as the Hagerman horse or American zebra
- Erethizon
- †Eucommia
- †Euptelea
- Falco
- Felis
- †Fraxinus
- Gallinula
- †Garrya
- †Gigantocamelus
- Ginkgo
- †Gleditsia
- Halesia
- †Hemiauchenia
- Homo
†HomotheriumRestoration of Pliocene-Pleistocene Homotherium, or scimitar cat - Hydrangea
- †Hypohippus
- †Hypolagus
- Ilex
- Juglans
- Larix
- Lasiurus
- Lasius
- †Ledum
- Lepus
- Libocedrus
†LimnephilusA living Limnephilus caddisfly - †Liriodendron
- †Lithocarpus
- Lontra
- Lynx
- †Macrophya
- Mahonia
- †Mammut
†Mammut americanumRestoration of a Mammut americanum, or American mastodon
- †Mammuthus
- †Megacamelus
- †Megalonyx
- †Megantereon
- Meleagris
- Mergus
- †Merychyus
- †Mesoreodon
- Messor – tentative report
- †Metalopex
- Metasequoia
- †Michenia
†MiohippusFossilized skull of the Eocene-Oligocene three-toed horse Miohippus - Mustela
- Natrix
- Neophrontops
- Neotoma
- †Niglarodon
- †Nyssa
- Odocoileus
- Ondatra
- †Osmunda
- Ostrya
- †Oxydactylus
- †Palaeolagus – tentative report
- Panthera
†ParamylodonFossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon - †Parthenocissus
- Pelecanus
- †Pelecanus halieus – type locality for species
- Perognathus
- Peromyscus
- Persea
- Phalacrocorax
- Phenacomys
- Phryganea
- Picea
- Pinus
- Platanus
- †Platygonus
- Populus
- Porzana
- †Potamogeton
- †Procastoroides
- Procyon
†PromerycochoerusRestoration of the Miocene hippopotamus-like oreodont Promerycochoerus both onshore and in the water. Robert Bruce Horsfall (1913). - †Protolabis
- Prunus
- †Pseudolarix
- †Pseudotsuga
- Pterocarya
- Puma
- Quercus
- Querquedula
- Rangifer
- †Rhamnus
- Rhododendron
- Rhus
†RhynchotheriumRestoration of the Miocene-Pliocene elephant relative Rhynchotherium - †Ribes
- Rosa
- Salix
- Sassafras
- †Satherium
- Scapanus
- †Scapanus townsendii – or unidentified related form
- Sciara
- Sequoia
- †Sequoiadendron
- †Simocyon
- †Smilax
†SmilodonLife restoration of the Pleistocene-Holocene saber-tooth cat Smilodon - †Sophora
- †Sorbus
- Sorex
- Spermophilus
- †Spiraea
- †Stegomastodon
- Sthenictis
- †Symphoricarpos
- Taxidea
- Taxodium
†TeleocerasRestoration of the Miocene-Pliocene rhinoceros Teleoceras - Thamnophis
- Thomomys
- †Thuja
- †Ticholeptus
- Tilia
- †Tsuga
- Typha
- Ulmus
- †Ungnadia
- Ursus
†VacciniumA variety of modern Vaccinium species, clockwise from top right: cranberries, lingonberries, blueberries, and huckleberries - †Vauquelinia
- Vulpes
- Zelkova
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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