This list of the Mesozoic 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 252.17 and 66 million years of age.

A

• † Albanites ^[1]
  • † Albanites americanus – type locality for species ^[1]
  • † Albanites sheldoni
• † Ampezzopleura – tentative report
  • † Ampezzopleura tenuis – or unidentified comparable form
• † Amphitomaria – tentative report
  • † Amphitomaria obscurecostata – type locality for species
• † Anaflemingites
  • † Anaflemingites russelli – type locality for species
• † Anasibirites
  • † Anasibirites desertorum
  • † Anasibirites lindgreni
• † Andangularia
  • † Andangularia babylona – type locality for species
  • † Andangularia occidentalis – type locality for species
• † Anemia
  • † Anemia fremonti
• † Angularia
  • † Angularia rectecostata – type locality for species
• † Anthostylis
  • † Anthostylis acanthophora

• 

  † Arcestes – tentative report
• † Arctomeekoceras
  • † Arctomeekoceras popovi – type locality for species
  • † Arctomeekoceras tardum – type locality for species
• † Aspenites
  • † Aspenites acutus
• † Aspiduriella – tentative report
  • † Aspiduriella idahoensis – type locality for species
• Astarte
  • † Astarte meeki
• † Astraeomorpha
  • † Astraeomorpha crassisepta
• † Astrocoenia
  • † Astrocoenia idahoensis – type locality for species
• † Austrotindaria
  • † Austrotindaria canalensis
  • † Austrotindaria svalbardensis

• 

  † 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

B

• † Bajarunia
  • † Bajarunia jacksoni
  • † Bajarunia pilata – type locality for species
  • † Bajarunia pilatum
• † Bakevellia
• † Bakevillia
• † Blodgettella
  • † Blodgettella enormecostata – type locality for species
• † Borestus – tentative report
• † Brochidiella – type locality for genus
  • † Brochidiella idahoensis – type locality for species

C

• † Camptonectes
  • † Camptonectes platessiformis
• † Caribouceras – type locality for genus ^[1]
  • † Caribouceras slugense – type locality for species ^[1]
• † Carteria – type locality for genus
  • † Carteria hotspringensis – type locality for species
• † Ceccaisculitoides
  • † Ceccaisculitoides hammondi

• 

  Chlamys
• † Chondrocoenia
  • † Chondrocoenia idahoensis
  • † Chondrocoenia schafhaeutli
• † Cimolodon ^[2]
  • † Cimolodon akersteni – type locality for species ^[2]
• † Claraia
  • † Claraia extrema
  • † Claraia stachei
• † Clypites
  • † Clypites tenuis – type locality for species
• † Coelostylina
• † Coenastraea
  • † Coenastraea hyatti
• † Columbites – type locality for genus
  • † Columbites crassicostatus – type locality for species
  • † Columbites dolnapaensis – or unidentified related form
  • † Columbites isabellae – type locality for species
  • † Columbites parisianus – type locality for species

• 

  Corbicula
• † Cordillerites – type locality for genus
  • † Cordillerites angulatus – type locality for species
• † Coscaites
  • † Coscaites crassus – type locality for species
• Cossmannea
• † Cryptaulax
  • † Cryptaulax acutus – type locality for species
  • † Cryptaulax gruendeli – type locality for species
  • † Cryptaulax nezperceorum – type locality for species
  • † Cryptaulax rhabdocolpoides
  • † Cryptaulax wallowaensis – type locality for species
• † Cryptorhynchia
  • † Cryptorhynchia bearensis – type locality for species
• † Ctenostreon
  • † Ctenostreon gikshanensis – or unidentified comparable form
• † Cupressinoxylon
• † Cyathocoenia
  • † Cyathocoenia squiresi
• † Cycadeoidea
• † Cylindrobullina – tentative report

• 

  † Cymbospondylus

D

• † Dagnoceras
  • † Dagnoceras bonnevillense
  • † Dagnoceras pealei
  • † Dagnoceras zappanense – or unidentified related form
• † Dalmatites
  • † Dalmatites attenuatus
  • † Dalmatites richardsi
• † Dennstaedtia – tentative report
  • † Dennstaedtia fremonti
• † Deweveria
  • † Deweveria dudresnayi – type locality for species
• † Diatrypesis
  • † Diatrypesis newelli – type locality for species
• † Dicosmos
• † Dieneroceras
  • † Dieneroceras dieneri
• † Distichophyllia
  • † Distichophyllia norica

E

• † Elysastraea
  • † Elysastraea profunda
  • † Elysastraea vancouverensis
• † Endostoma – tentative report
• † Enoploceras
  • † Enoploceras newelli – type locality for species
• † Entolioides
  • † Entolioides utahensis
• † Eocalliostoma
  • † Eocalliostoma idahoensis – type locality for species
  • † Eocalliostoma multicostata – type locality for species
• † Eschericeratites – type locality for genus
  • † Eschericeratites lytoceratoides – type locality for species
• † Euchrysalis – tentative report
• † Eucycloscala
  • † Eucycloscala binodosa – or unidentified related form
• † Euflemingites
  • † Euflemingites cirratus – type locality for species
• † Eumicrotis – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Eumicrotis curta
• † Eumorphotis
  • † Eumorphotis multiformis

F

• † Fengshanites
  • † Fengshanites americanus
• † Flemingites
  • † Flemingites aspenensis
  • † Flemingites bannockensis
  • † Flemingites cirratus

G

• † Gablonzeria
  • † Gablonzeria major
  • † Gablonzeria profunda
• † Germanonautilus
  • † Germanonautilus montpelierensis – type locality for species
• † Gervillia – report made of unidentified related form or using admittedly obsolete nomenclature
• † Glabercolumbites – type locality for genus
  • † Glabercolumbites glaber – type locality for species
• Gleichenia
• † Gnomohalorites
  • † Gnomohalorites cordilleranus
• † Grammatodon
  • † Grammatodon haguei

• 

  † Gryphaea
  • † Gryphaea nebrascensis
  • † Gryphaea planoconvexa
• † Grypoceras
  • † Grypoceras milleri – type locality for species
• † Gudrunella – type locality for genus
  • † Gudrunella triassica – type locality for species

H

• 

  † Hedenstroemia
  • † Hedenstroemia kossmati
• † Hellenites
  • † Hellenites elegans – type locality for species
  • † Hellenites idahoense
• † Hemilecanites
  • † Hemilecanites paradiscus
• † Hemiprionites
  • † Hemiprionites typus
• † Heptastylis – tentative report
  • † Heptastylis alpina
  • † Heptastylis maculata
• † Holocrinus
  • † Holocrinus smithi

I

• † Idahocolumbites
  • † Idahocolumbites cheneyi
• † Idahospira – type locality for genus
  • † Idahospira multispirata – type locality for species

• 

  † Inoceramus
• † Inyoites
  • † Inyoites oweni
• † Isculitoides
  • † Isculitoides originis – or unidentified related form

J

• † Jeanbesseiceras
  • † Jeanbesseiceras jacksoni – type locality for species
• † Jurassiphorus
  • † Jurassiphorus triadicus
• † Juvenites – type locality for genus
  • † Juvenites dieneri
  • † Juvenites kraffti – type locality for species
  • † Juvenites septentrionalis
  • † Juvenites thermarum

K

• † Kazakhstanites
  • † Kazakhstanites dolnapensis
• † Kiparisovites
  • † Kiparisovites ovalis – or unidentified related form
• † Kittliconcha
  • † Kittliconcha obliquecostata

L

• † Lamelliphorus
  • † Lamelliphorus acutelaminatus – type locality for species
• † Lanceolites
  • † Lanceolites compactus
• † Lecanites
  • † Lecanites arnoldi
• † Lepismatina
  • † Lepismatina mansfieldi – type locality for species
• † Leptochondria
  • † Leptochondria curtocardinalis
  • † Leptochondria occidanea
• † Levicidaris
• † Lingula
• † Lingularia
• † Liostrea
  • † Liostrea strigilecula
• † Litogaster
  • † Litogaster turnbullensis – type locality for species

• 

  Lopha
• † Loxopleurus
  • † Loxopleurus belliplicatus
• † Lyosoma
  • † Lyosoma powelli

M

• † Marcouxia
  • † Marcouxia astakhovi
• † Maturifusus – tentative report
  • † Maturifusus siphonatus – type locality for species
• † Meekoceras
  • † Meekoceras cristatum
  • † Meekoceras gracilitatis – type locality for species
  • † Meekoceras haydeni
  • † Meekoceras micromphalus
  • † Meekoceras mushbachanum
  • † Meekoceras patelliforme
  • † Meekoceras sanctorum
• † Megasphaeroceras
  • † Megasphaeroceras rotundum – or unidentified related form
• † Metadagnoceras
  • † Metadagnoceras pulchrum – or unidentified related form
  • † Metadagnoceras unicum
• † Metussuria
  • † Metussuria waageni – type locality for species
• † Microtaenia
  • † Microtaenia variabilis
• † Miocidaris
• † Mojsvaroceras
  • † Mojsvaroceras frenchi – type locality for species
• † Myalina
  • † Myalina postcarbonica

N

• † Naticopsis – tentative report
• † Nemacanthus
  • † Nemacanthus elegans – type locality for species
• † Neocolumbites
• † Neogondolella
  • † Neogondolella jubata
• † Neoschizodus
• † Neospathodus
  • † Neospathodus homeri – tentative report
  • † Neospathodus triangularis
• † Nerinea
• † Nodoconus – type locality for genus
  • † Nodoconus nodiferus – type locality for species
• † Nordophiceratoides
  • † Nordophiceratoides adriani – type locality for species
  • † Nordophiceratoides bartolinae – type locality for species
  • † Nordophiceratoides catherinae – type locality for species
  • † Nordophiceratoides gracilis – type locality for species

• 

  † Normannites
  • † Normannites crickmayi – or unidentified comparable form
• † Nuetzelopsis
  • † Nuetzelopsis tozeri

O

• † Obnixia – type locality for genus
  • † Obnixia thaynesiana – type locality for species
• † Omphaloptycha
  • † Omphaloptycha jaworskii
• † Orthoceras

• 

  Ostrea
  • † Ostrea strigicula
• † Owenites
  • † Owenites koeneni – or unidentified comparable form

P

• 

  † Pagiophyllum
• † Palaeastraea
• † Palaeonarica
  • † Palaeonarica lapwaiensis – type locality for species
• † Palaeophyllites – tentative report
• † Pamiroseris
  • † Pamiroseris rectilamellosa
  • † Pamiroseris smithi
• † Paradelphinulopsis
  • † Paradelphinulopsis vallieri
• † Paragoceras
  • † Paragoceras malayanus – or unidentified comparable form
  • † Paragoceras timorensis – or unidentified related form
• † Paranannites – type locality for genus
  • † Paranannites aspenensis – type locality for species
• † Paraphyllanthoxylon
  • † Paraphyllanthoxylon idahoense
• † Paullia
• † Pentacrinus
  • † Pentacrinus asteriscus
• † Periallus – type locality for genus
  • † Periallus woodsidensis – type locality for species
• † Permophorus
  • † Permophorus bregeri
  • † Permophorus triassicus
• † Phacelophyllia – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Phacelophyllia suttonensis
• † Phacelostylophyllum
  • † Phacelostylophyllum zitteli
• † Phaedrysmocheilus
  • † Phaedrysmocheilus idahoensis – type locality for species

• 

  Pholadomya
  • † Pholadomya inaequiplicata
• † Piarorhynchella
  • † Piarorhynchella triassica
• † Plagiostoma
  • † Plagiostoma occidentalis
• † Platymya
  • † Platymya rockymontana
• † Platyvillosus
  • † Platyvillosus asperatus
• † Pleuromya
  • † Pleuromya subcompressa

• 

  † Pleuronautilus
• † Polygyrina – tentative report
  • † Polygyrina subannulata – type locality for species
• † Portneufia – type locality for genus
  • † Portneufia episulcata – type locality for species
• † Praelittorina
  • † Praelittorina sepkoskii – type locality for species
• † Praesibirites – tentative report
• † Precorynella
• † Preflorianites
  • † Preflorianites toulai
• † Procarnites
• † Procolumbites
  • † Procolumbites karataucicus
• † Prohungarites
  • † Prohungarites beyrichitoides – type locality for species
  • † Prohungarites gutstadti
  • † Prohungarites mckelvei
• † Promathildia – tentative report
  • † Promathildia multituberculata – type locality for species
• † Promyalina
  • † Promyalina putiatinensis
  • † Promyalina spathi
• † Pronoella
  • † Pronoella cinnabarensis
  • † Pronoella uintahensis
• † Protocardia
  • † Protocardia schucherti – or unidentified comparable form
• † Protodonax
• † Protogusarella – type locality for genus
  • † Protogusarella smithi – type locality for species
• † Protorcula – tentative report
  • † Protorcula concava – type locality for species
• † Pseudaspidites
  • † Pseudaspidites wheeleri
• † Pseudharpoceras
  • † Pseudharpoceras idahoense

• 

  † Pseudomelania – tentative report
• † Pseudomonotis
  • † Pseudomonotis idahoensis
  • † Pseudomonotis pealei
• † Pseudosageceras
  • † Pseudosageceras multilobatum – type locality for species
• † Pseudoscalites
  • † Pseudoscalites elegantissimus – or unidentified comparable form
• † Pteria – tentative report
  • † Pteria ussurica – or unidentified comparable form
• † Ptychomphalus – tentative report
  • † Ptychomphalus protei – or unidentified related form
• † Ptychostoma
  • † Ptychostoma ornata – type locality for species
• † Pyknotylacanthus – type locality for genus
  • † Pyknotylacanthus spathianus – type locality for species
• † Pyrgulifera
  • † Pyrgulifera humerosa

Q

• † Quenstedtia
  • † Quenstedtia sublevis

R

• † Retiophyllia
  • † Retiophyllia clathrata – or unidentified comparable form
  • † Retiophyllia dawsoni
  • † Retiophyllia parviseptum
• † Rhaetina
  • † Rhaetina incurvirostra – type locality for species

• 

  † Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature
• † Rudolftruempyiceras
  • † Rudolftruempyiceras apostolicum
  • † Rudolftruempyiceras apostolicus

S

• 

  † Saurichthys
  • † Saurichthys elongatus – or unidentified comparable form
• † Sibirites
  • † Sibirites carinatus – type locality for species
• † Silberlingeria
  • † Silberlingeria bearlakensis
  • † Silberlingeria coronata
  • † Silberlingeria sarahjanae – type locality for species
• † Siphonilda – type locality for genus
  • † Siphonilda pulchella – type locality for species
• † Sororcula
  • † Sororcula gracilis
• † Spiniomphalus – type locality for genus
  • † Spiniomphalus duplicatus – type locality for species
• † Spiriferina
  • † Spiriferina roundyi
• † Spirostylus
• † Spondylospira
  • † Spondylospira lewesensis
• † Stacheites
  • † Stacheites concavus
  • † Stacheites floweri
  • † Stacheites prionoides – or unidentified related form
• † Stemmatoceras
  • † Stemmatoceras albertense – or unidentified related form

• 

  † Stephanoceras
  • † Stephanoceras skidegatensis – or unidentified comparable form
• † Stylophyllum
  • † Stylophyllum paradoxum
• † Subcolumbites
  • † Subcolumbites perrinismithi – or unidentified related form
• † Subhungarites
  • † Subhungarites yatesi
• † Submeekoceras
  • † Submeekoceras mushbachanum – type locality for species
• † Svalbardiceras
  • † Svalbardiceras freboldi – or unidentified comparable form
  • † Svalbardiceras spitzbergensis – or unidentified related form
  • † Svalbardiceras sulcatum – type locality for species

T

• † Tancredia – tentative report
• † Tapponnierites – type locality for genus
  • † Tapponnierites tenuicostatus – type locality for species
• † Tardicolumbites – type locality for genus
  • † Tardicolumbites tardicolumbus – type locality for species
• † Teinostomopsis – tentative report
• † Tempskya
  • † Tempskya wesselii

• 

  † Tenontosaurus
• † Teretrina
  • † Teretrina aculeata
  • † Teretrina canaliculata – type locality for species
  • † Teretrina schulberti – type locality for species
• † Thamnasteria
  • † Thamnasteria smithi
• † Thaumastocoelia
• † Thecomeandra
  • † Thecomeandra vallieri – type locality for species
• † Tirolites
  • † Tirolites harti
  • † Tirolites knighti
  • † Tirolites pealei
  • † Tirolites smithi – type locality for species
• † Tretospira
• † Triadocidaris

• 

  † Trigonia
  • † Trigonia montanaensis
• † Tyrsoecus – tentative report

U

• † Ueckerconulus
  • † Ueckerconulus noricus – type locality for species
• † Undularia
  • † Undularia americana – type locality for species
• † Unionites
• † Ussuria
  • † Ussuria occidentalis
• † Ussurites
  • † Ussurites mansfeldi
  • † Ussurites mansfieldi
  • † Ussurites submansfeldi – type locality for species

V

• † Vex – type locality for genus
  • † Vex semisimplex – type locality for species
• † Vitimetula – type locality for genus
  • † Vitimetula parva – type locality for species

W

• † Weitschatopsis
  • † Weitschatopsis pulchra
• † Worthenia
  • † Worthenia rhombifera – or unidentified comparable form
• † Wyomingites – type locality for genus
  • † Wyomingites aplanatus – type locality for species
  • † Wyomingites arnoldi – type locality for species

X

• † Xenoceltites
  • † Xenoceltites cordilleranus
  • † Xenoceltites crenulatus – type locality for species
  • † Xenoceltites spencei

• 

  † Xenodiscus
  • † Xenodiscus gilberti
  • † Xenodiscus tarpeyi
  • † Xenodiscus waageni
  • † Xenodiscus whiteanus

Y

• † Yunnania – tentative report
  • † Yunnania subcincta
• † Yvesgalleticeras
  • † Yvesgalleticeras montpelierense
  • † Yvesgalleticeras raphaeli – type locality for species

Z

• † Zardinechinus
• † Zygopleura

References

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