# List of the prehistoric life of Idaho

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
* Assemblage of fossils of the Cambrian trilobite Agnostus †Agnostus
* †Amplexus
* † Ananias
* Archaeolithophyllum
* †Atrypa
* †Aulopora
* †Aviculopecten
** †Aviculopecten kaibabensis – or unidentified comparable form
* † Avonia
* †Bathyuriscus
* †Benthamaspis
* †Caninia
* †Cardiograptus
* †Chancia
* †Chonetes
** †Chonetes logani
* †Cleiothyridina
** †Cleiothyridina sublamellosa
* Assemblage of fossils of the Cambrian graptolite Climacograptus †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
** †Didymograptus extensus
* †Diplograptus
* †Edmondia
* †Ehmaniella
* †Elrathia
* †Elrathina
* †Euomphalus
* †Fenestella
* †Gastrioceras – report made of unidentified related form or using admittedly obsolete nomenclature
* †Girvanella
* †Gogia
* †Goniograptus
* †Haplophrentis
* †Helcionella
* Life restoration of the Permian Chimaera relative Helicoprion †Helicoprion
** †Helicoprion davisii – type locality for species
* †Hintzeia
* †Hyolithes
* †Isograptus
* †Kazakhstania
* †Kootenia
* †Lingula
* †Lingulella
* †Lithostrotion
* †Margaretia
* †Martinia
* †Micromitra
* †Monograptus
** †Monograptus convolutus
* †Morania
* †Naticopsis
* †Neospirifer
* †Niobe – tentative report
* †Obolus
* †Ogygopsis
* Fossil of the Cambrian trilobite Olenoides †Olenoides
* †Orthotheca
* †Oryctocephalus
* †Pagetia
* Palaeoaplysina
* †Paterina
* †Pelagiella
* †Peronopsis
* †Phyllograptus
* †Plaesiomys
* †Platyceras
* †Platycrinites
* †Platystrophia
* †Poulsenia
* †Prodentalium
* Restoration of the Silurian trilobite Proetus †Proetus
* †Protopliomerella
* †Protospongia
* †Quadratia
* †Selkirkia
* †Siphonodendron
* †Spirifer
** †Spirifer brazerianus
* †Spiriferina
* †Strophomena
* Fossil of the Devonian tabulate coral Syringopora †Syringopora
* †Tetragraptus
* †Tetrataxis
* †Thoracocare
* †Urotheca
* †Wilkingia
* †Worthenia – tentative report
* †Zacanthoides

## Mesozoic
### Selected Mesozoic taxa of Idaho

* †Albanites
* †Anaflemingites
* †Anasibirites
* †Anemia
* Life restoration of two species of the Late Triassic ammonoid cephalopod Arcestes †Arcestes – tentative report
* †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
** †Ceccaisculitoides hammondi
* Chlamys
* †Claraia
** †Claraia stachei
* Corbicula
* †Cryptaulax
* †Cycadeoidea
* Diagram illustrating the Middle-Late Triassic ichthyosaur Cymbospondylus with an anachronistic human to scale. †Cymbospondylus
* †Dagnoceras
* †Dennstaedtia – tentative report
* †Enoploceras
* †Flemingites
* †Germanonautilus
* †Gervillia – report made of unidentified related form or using admittedly obsolete nomenclature
* Gleichenia
* †Gryphaea
* †Grypoceras
* †Hedenstroemia
* Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size †Inoceramus
* †Inyoites
** †Inyoites oweni
* †Lecanites
* †Lingula
* Lopha
* †Meekoceras
** †Meekoceras gracilitatis – type locality for species
* †Megasphaeroceras
* †Naticopsis – tentative report
* †Nemacanthus
** †Nemacanthus elegans – type locality for species
* †Neogondolella
* †Neospathodus
* †Nerinea
* Fossilized shell of the Middle Jurassic ammonoid cephalopod Normannites †Normannites
* †Orthoceras
* Ostrea
* †Owenites
** †Owenites koeneni – or unidentified comparable form
* †Pagiophyllum
* †Palaeophyllites – tentative report
* †Phaedrysmocheilus
* Pholadomya
** †Pholadomya inaequiplicata
* †Plagiostoma
* †Platymya
* Fossilized shell of the Carboniferous-Triassic nautiloid cephalopod Pleuronautilus †Pleuronautilus
* †Protocardia
* †Pseudomelania – tentative report
* †Pteria – tentative report
* †Rhaetina
* †Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature
* †Saurichthys
* †Spiriferina
** †Spiriferina roundyi
* †Stephanoceras
* †Tempskya
* Life restoration of the Early Cretaceous Iguanodon relative Tenontosaurus †Tenontosaurus
* †Thamnasteria
* †Trigonia
** †Trigonia montanaensis
* †Ussuria
* †Ussurites
* †Vex – type locality for genus
* †Worthenia
* †Wyomingites – type locality for genus
* †Xenoceltites
** †Xenoceltites cordilleranus
* Fossilized shells of the ammonoid cephalopod Xenodiscus †Xenodiscus

## Cenozoic
### Selected Cenozoic taxa of Idaho

* Abies
* Acer
* †Acritohippus
** †Acritohippus isonesus
* †Aepycamelus
* †Aesculus
* Agelaius
** †Agelaius phoeniceus
* †Agriotherium
* †Alforjas – tentative report
* Alnus
* Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932). †Amebelodon
* Amelanchier
* Anas
** †Anas platyrhynchos
* Anser
** †Anser caerulescens
* Antilocapra
** †Antilocapra americana
* Antrozous
** †Antrozous pallidus
* †Aphelops
* †Archaeohippus
* †Arctodus
** †Arctodus simus
* Ardea
** †Ardea herodias
* Baiomys
* Betula
* Bibio
* Bison
** †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
* †Bombus
* 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
* †Camelops
** †Camelops hesternus
* Camponotus
* Canis
** †Canis dirus
** †Canis ferox
** †Canis latrans
** †Canis lepophagus
* A living Carya, or hickory tree Carya
* Castor
** †Castor californicus
** †Castor canadensis
* Ceanothus
* Cedrela
* Cercidiphyllum
* Cervus
** †Cervus elaphus – or unidentified comparable form
* †Chamaecyparis
* Chen
* †Chrysolepis
* Ciconia – tentative report
** Mounted fossilized skeleton of the Pliocene-Pleistocene Ciconia maltha, also known as the asphalt stork or La Brea stork †Ciconia maltha
* Comptonia
* Cornus
* †Cosoryx
* Craigia
* Crataegus
* †Cunninghamia
* Cygnus
* Cynomys
* †Dennstaedtia
* †Diceratherium
* †Dipoides
* Dolichoderus
* †Domnina
* †Dromomeryx
* Dytiscus
* Elaphe
** †Elaphe vulpina
* †Epicyon
** †Epicyon haydeni
* †Equisetum
* Equus
** †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 dorsatum
* †Eucommia
* †Euptelea
* Falco
** †Falco peregrinus
* Felis
* †Fraxinus
* Gallinula
** †Gallinula chloropus
* †Garrya
* †Gigantocamelus
* Ginkgo
** †Ginkgo adiantoides
* †Gleditsia
* Halesia
* †Hemiauchenia
** †Hemiauchenia macrocephala
* Homo
** †Homo sapiens
* Restoration of Pliocene-Pleistocene Homotherium, or scimitar cat †Homotherium
** †Homotherium serum
* Hydrangea
* †Hypohippus
* †Hypolagus
* Ilex
* Juglans
* Larix
* Lasiurus
* Lasius
* †Ledum
* Lepus
* Libocedrus
* A living Limnephilus caddisfly †Limnephilus
* †Liriodendron
* †Lithocarpus
* Lontra
** †Lontra canadensis
* Lynx
** †Lynx canadensis
** †Lynx rufus
* †Macrophya
* Mahonia
* †Mammut
** Restoration of a Mammut americanum, or American mastodon †Mammut americanum
* †Mammuthus
** †Mammuthus columbi
* †Megacamelus
* †Megalonyx
** †Megalonyx jeffersonii
** †Megalonyx leptostomus
* †Megantereon
* Meleagris
** †Meleagris gallopavo
* Mergus
** †Mergus merganser
* †Merychyus
* †Mesoreodon
* Messor – tentative report
* †Metalopex
* Metasequoia
** †Metasequoia occidentalis
* †Michenia
* Fossilized skull of the Eocene-Oligocene three-toed horse Miohippus †Miohippus
* Mustela
* Natrix
* Neophrontops
* Neotoma
* †Niglarodon
* †Nyssa
* Odocoileus
* Ondatra
** †Ondatra zibethicus
* †Osmunda
* Ostrya
* †Oxydactylus
* †Palaeolagus – tentative report
* Panthera
** †Panthera leo
* Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon †Paramylodon
** †Paramylodon harlani
* †Parthenocissus
* Pelecanus
** †Pelecanus halieus – type locality for species
* Perognathus
* Peromyscus
* Persea
* Phalacrocorax
** †Phalacrocorax auritus
* Phenacomys
* Phryganea
* Picea
* Pinus
* Platanus
* †Platygonus
* Populus
* Porzana
* †Potamogeton
* †Procastoroides
* Procyon
** †Procyon lotor
* Restoration of the Miocene hippopotamus-like oreodont Promerycochoerus both onshore and in the water. Robert Bruce Horsfall (1913). †Promerycochoerus
* †Protolabis
* Prunus
* †Pseudolarix
* †Pseudotsuga
* Pterocarya
* Puma
** †Puma concolor
* Quercus
* Querquedula
* Rangifer
** †Rangifer tarandus
* †Rhamnus
* Rhododendron
* Rhus
* Restoration of the Miocene-Pliocene elephant relative Rhynchotherium †Rhynchotherium
* †Ribes
* Rosa
* Salix
* Sassafras
* †Satherium
** †Satherium piscinarium
* Scapanus
** †Scapanus townsendii – or unidentified related form
* Sciara
* Sequoia
** †Sequoia affinis
* †Sequoiadendron
** †Sequoiadendron chaneyi
* †Simocyon
* †Smilax
* Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon †Smilodon
** †Smilodon fatalis
* †Sophora
* †Sorbus
* Sorex
** †Sorex palustris
* Spermophilus
* †Spiraea
* †Stegomastodon
** †Stegomastodon mirificus
* Sthenictis
* †Symphoricarpos
* Taxidea
** †Taxidea taxus
* Taxodium
* Restoration of the Miocene-Pliocene rhinoceros Teleoceras †Teleoceras
* Thamnophis
* Thomomys
** †Thomomys townsendii
* †Thuja
* †Ticholeptus
* Tilia
** †Trigonictis macrodon
* †Tsuga
* Typha
* Ulmus
* †Ungnadia
* Ursus
* A variety of modern Vaccinium species, clockwise from top right: cranberries, lingonberries, blueberries, and huckleberries †Vaccinium
* †Vauquelinia
* Vulpes
** †Vulpes vulpes
* Zelkova