List of the Paleozoic life of Idaho

This list of the Paleozoic 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 541 and 252.17 million years of age.

A
  • †Acrothele
    • †Acrothele affinis
    • †Acrothele artemis
    • †Acrothele parilis – type locality for species
    • †Acrothele speciosa – type locality for species
  • †Acrothyra
    • †Acrothyra minor
  • †Acrotreta
    • †Acrotreta definita
    • †Acrotreta eucharis – type locality for species
    • †Acrotreta levata
    • †Acrotreta nitens – type locality for species
    • †Acrotreta sulcata
  • †Adrianites
  • Assemblage of fossils of the Cambrian trilobite Agnostus
    †Agnostus
    • †Agnostus bonnerensis – type locality for species
    • †Agnostus lautus – type locality for species
  • †Albertella
    • †Albertella sampsoni – type locality for species
  • †Allanaria
    • †Allanaria engelmanni
  • †Alokistocare
    • †Alokistocare euchare – type locality for species
    • †Alokistocare idahoense
    • †Alokistocare laticaudum
    • †Alokistocare nactum – type locality for species
    • †Alokistocare natale – type locality for species
    • †Alokistocare noduliferum – type locality for species
    • †Alokistocare normale – type locality for species
    • †Alokistocare notatum – type locality for species
    • †Alokistocare nothum – type locality for species
    • †Alokistocare septum
    • †Alokistocare spencense
  • †Alokistocarella
    • †Alokistocarella occidens – type locality for species
    • †Alokistocarella spencei
  • †Amblycranium
    • †Amblycranium cornutum – type locality for species
    • †Amblycranium populus – type locality for species
    • †Amblycranium variabile – type locality for species
  • †Ambothyris
    • †Ambothyris utahensis – type locality for species
  • †Amechilus
    • †Amechilus palaora – type locality for species
  • †Amphipora
  • †Amplexizaphrenitis
  • †Amplexizaphrentis
  • †Amplexograptus
    • †Amplexograptus latus – or unidentified related form
    • †Amplexograptus manitoulinensis – or unidentified related form
    • †Amplexograptus perexcavatus
  • †Amplexus
  • †Ampyxina
  • † Ananias
    • †Ananias nevadensis – or unidentified related form
  • †Anazyga
    • †Anazyga recurvirostra – or unidentified comparable form
  • †Ancenochilus
  • †Anidanthus
    • †Anidanthus echaris
    • †Anidanthus eucharis – type locality for species
  • †Anomalorthis
  • †Anthracospirifer
    • †Anthracospirifer arcoensis – type locality for species
    • †Anthracospirifer curvilateralis
    • †Anthracospirifer leidyi
    • †Anthracospirifer occiduus
    • †Anthracospirifer shawi
  • †Antiquatonia
    • †Antiquatonia sulcatus – or unidentified comparable form
  • †Apatokephalus – tentative report
  • †Apheorthis
    • †Apheorthis meeki – or unidentified comparable form
  • †Appendispinograptus
    • †Appendispinograptus longispinus
  • †Apterrinella
  • †Arachniograptus
    • †Arachniograptus laqueus
  • †Archaeocyathus
  • Archaeolithophyllum
  • †Asaphellus – tentative report
    • †Asaphellus eudocia
  • †Astartella
    • †Astartella subquadrata
  • †Asthenospongia – type locality for genus
    • †Asthenospongia acantha – type locality for species
  • Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa
    †Atrypa
    • †Atrypa oneidensis – type locality for species
    • †Atrypa putilla – or unidentified related form
  • †Aulopora
  • †Auloprotonia
  • †Austinella
    • †Austinella whitfieldi – or unidentified related form
  • †Aviculopecten
  • † Avonia

B
  • †Babylonites
    • †Babylonites conoideus
    • †Babylonites ferrieri – type locality for species
  • †Bakevellia – tentative report
  • †Basilicus – tentative report
  • †Bathymyonia
    • †Bathymyonia nevadensis – type locality for species
  • †Bathyuriscus
    • †Bathyuriscus atossa
    • †Bathyuriscus politus – type locality for species
  • †Bearriverops
    • †Bearriverops alsacharovi
    • †Bearriverops borderinnensis
    • †Bearriverops loganensis – type locality for species
  • †Bellaspis – tentative report
  • †Bellefontia
    • †Bellefontia acuminiferentis
    • †Bellefontia chamberlaini
  • †Bensbergia
    • †Bensbergia altivolvis
  • †Benthamaspis
    • †Benthamaspis obrepta
  • †Billingsella
  • †Blastoidocrinus
    • †Blastoidocrinus carchariaedens – or unidentified comparable form
  • †Brachythyris
    • †Brachythyris subcardiiformis
  • †Bythicheilus
    • †Bythicheilus alveatum
    • †Bythicheilus typicum

C
  • †Camarotechia
  • †Cancrinella
    • †Cancrinella phosphatica – type locality for species
  • †Caninia
    • †Caninia excentrica
  • †Cardiograptus
  • †Cardiomorpha – tentative report
  • †Chaetetes
  • †Chancia
    • †Chancia angusta
    • †Chancia ebdome
    • †Chancia evax
  • †Chonetes
  • †Clappaspis
    • †Clappaspis coriacea
    • †Clappaspis dotis
    • †Clappaspis idahoensis
    • †Clappaspis lanata
    • †Clappaspis spencei
  • †Clavaspidella
    • †Clavaspidella bithus
    • †Clavaspidella minor – type locality for species
  • †Cleiothryidina
  • †Cleiothyridina
  • †Cleiothyridinia
  • †Clelandia
    • †Clelandia utahensis – type locality for species
  • Assemblage of fossils of the Cambrian graptolite Climacograptus
    †Climacograptus
    • †Climacograptus bicornis
    • †Climacograptus brevis
    • †Climacograptus caudatus
    • †Climacograptus hastatus
    • †Climacograptus innotatus
    • †Climacograptus minimus – or unidentified comparable form
    • †Climacograptus mohawkensis – or unidentified comparable form
    • †Climacograptus raricaudatus – or unidentified comparable form
    • †Climacograptus riddellensis
    • †Climacograptus scalaris – or unidentified comparable form
    • †Climacograptus tabuliferus – or unidentified comparable form
    • †Climacograptus tubuliferus
    • †Climacograptus uncinatus
  • †Clinopistha
  • Fossilized shell of the Late Devonian-Permian brachiopod Composita
    †Composita
  • †Corynoides
    • †Corynoides calicularis
  • †Croixana
  • †Crurithyris
    • †Crurithyris arcuata – type locality for species
    • †Crurithyris arcuatus
  • †Cryptograptus
    • †Cryptograptus tricornis
  • †Cyathaxonia
  • †Cyclogyra – tentative report
  • †Cyrtina
    • †Cyrtina acutirostris
    • †Cyrtina billingsi – or unidentified comparable form
  • †Cyrtograptus
    • †Cyrtograptus grayae – or unidentified comparable form
    • †Cyrtograptus kirki
    • †Cyrtograptus laqueus
    • †Cyrtograptus rigidus
  • †Cyrtorostra
    • †Cyrtorostra varicostata
  • †Cystidictya
  • †Cystodictya
  • †Cythaxonia

D
  • †Daubichites
    • †Daubichites brevicostatus – type locality for species
  • †Demarezites
    • †Demarezites furnishi – type locality for species
  • †Derbyia
  • †Diaphragmus
    • †Diaphragmus nivosus
  • †Dibunophyllum
  • †Dicellograptus
    • †Dicellograptus alector – type locality for species
    • †Dicellograptus angulatus – or unidentified comparable form
    • †Dicellograptus divaricatus
    • †Dicellograptus elegans – or unidentified comparable form
    • †Dicellograptus ornatus
    • †Dicellograptus sextans
  • †Diceromyonia
    • †Diceromyonia tersa – or unidentified comparable form
  • †Diconularia
    • †Diconularia meadepeakensis – type locality for species
  • †Dicranograptus
    • †Dicranograptus brevicaulis – or unidentified comparable form
    • †Dicranograptus contortus
    • †Dicranograptus kirki – or unidentified comparable form
    • †Dicranograptus nicholsoni
    • †Dicranograptus spinifer
  • †Dictyoclostus
  • †Dictyoclustus – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Dictyonema
  • Fossil of the Middle Ordovician graptolite Didymograptus
    †Didymograptus
    • †Didymograptus extensus
    • †Didymograptus gemminus – or unidentified comparable form
    • †Didymograptus gracilis
    • †Didymograptus protobifidus
  • †Dielasma
  • †Dimegelasma
  • †Diparelasma
    • †Diparelasma typicum – or unidentified comparable form
  • †Diphyphyllum
  • †Diplograptus
  • †Dolichometopsis
    • †Dolichometopsis alia – type locality for species
    • †Dolichometopsis comis – type locality for species
    • †Dolichometopsis communis – type locality for species
    • †Dolichometopsis gravis – type locality for species
    • †Dolichometopsis lepida – type locality for species
    • †Dolichometopsis media – type locality for species
    • †Dolichometopsis potens – type locality for species
    • †Dolichometopsis poulseni – type locality for species
    • †Dolichometopsis propinqua – type locality for species
    • †Dolichometopsis stella – type locality for species
  • †Dorispira
    • †Dorispira arguta – type locality for species
    • †Dorispira burlingi – type locality for species
    • †Dorispira pocatelloensis – type locality for species
  • †Dorlodotia
  • †Dyscritella
    • †Dyscritella bogatensis
  • †Dyscritellina
    • †Dyscritellina grandicora – type locality for species
    • †Dyscritellina multispinosa

E
  • †Echinauris
  • †Echinoconchus
    • †Echinoconchus alternatus
  • †Edmondia
    • †Edmondia phosphatica – type locality for species
    • †Edmondia phosphoriensis – or unidentified comparable form
  • †Ehmaniella
    • †Ehmaniella maladensis
  • †Ekvasophyllum
  • Fossils at different stages of development of the Cambrian trilobite Elrathia
    †Elrathia
    • †Elrathia idahoensis – type locality for species
    • †Elrathia longiceps – type locality for species
    • †Elrathia offula
    • †Elrathia rara
    • †Elrathia sampsoni – type locality for species
    • †Elrathia spencei
  • †Elrathina
    • †Elrathina spencei – or unidentified comparable form
  • †Emanuella
  • †Endothyra
  • †Eochonetes
    • †Eochonetes voldemortus – type locality for species
  • †Eocrinus
    • †Eocrinus longidactylus
  • †Eolissochonetes
    • †Eolissochonetes pseudoliratus
  • †Eomartiniopsis
    • †Eomartiniopsis rostrata
  • †Eugonophyllum
  • †Eumetria
    • †Eumetria costata
  • Fossilized shell of the Silurian-Permian sea snail Euomphalus
    †Euomphalus
    • †Euomphalus subplanus

F
  • †Faberophyllum
  • †Faberophylum
  • †Faberphyllum
  • †Fenestella
  • †Fistulipora
  • †Flectihystricurus
    • †Flectihystricurus acumennasus – type locality for species
    • †Flectihystricurus flectimembrus – type locality for species
  • †Flexaria

G
  • †Gastrioceras – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Gastrioceras williamsi
  • †Genalaticurus
    • †Genalaticurus genalatus – type locality for species
  • †Girtyella
  • †Girtypecten
  • †Girvanella
  • †Glabrocingulum – tentative report
  • †Glassoceras
    • †Glassoceras bransonorum – type locality for species
  • †Globivalvulina
  • †Glossograptus
    • †Glossograptus hincksii
  • †Glossopleura
    • †Glossopleura bion
    • †Glossopleura intermedia – type locality for species
    • †Glossopleura similaris
  • †Glyptograptus
    • †Glyptograptus altus
    • †Glyptograptus euglyphus
    • †Glyptograptus tamariscus
  • †Glyptorthis
    • †Glyptorthis pulchra – or unidentified comparable form
  • Fossil of the Cambrian echinoderm Gogia
    †Gogia
    • †Gogia hobbsi
    • †Gogia palmeri
  • †Goniograptus
    • †Goniograptus geometricus
  • †Goniophrys
    • †Goniophrys prima – type locality for species
  • †Gosseletina
    • †Gosseletina idahoensis

H
  • †Hallograptus
  • †Haplophrentis
    • †Haplophrentis carinatus – type locality for species
  • †Hedraites
  • †Helcionella
  • Life restoration of the Permian Chimaera relative Helicoprion
    †Helicoprion
    • †Helicoprion davisii – type locality for species
    • †Helicoprion ergassaminon – type locality for species
  • †Hesperonomia
    • †Hesperonomia dinorthoides
  • †Hillyardina
    • †Hillyardina marginauctum – type locality for species
    • †Hillyardina semicylindrica – type locality for species
  • †Hintzecurus
    • †Hintzecurus paragenalatus – type locality for species
  • †Hintzeia
    • †Hintzeia celsaora – type locality for species
  • †Homalophyllites
    • †Homalophyllites subcrassus
  • †Hustedia
  • †Hustedograptus
    • †Hustedograptus teretiusculus
  • Fossilized shells of the Cambrian-Permian brachiopod relative Hyolitha
    †Hyolithes
    • †Hyolithes ornatellus
    • †Hyolithes prolixus – type locality for species
  • †Hypothetica
    • †Hypothetica rawi – type locality for species
  • †Hystricurus
    • †Hystricurus contractus – type locality for species
    • †Hystricurus oculilunatus – type locality for species
    • †Hystricurus robustus – type locality for species

I
  • †Idahoia
  • †Inflatia
    • †Inflatia inflata – or unidentified comparable form
  • †Inglefieldia
  • †Iphidella
    • †Iphidella grata
    • †Iphidella maladensis
    • †Iphidella pannula – or unidentified comparable form
  • †Isograptus
    • †Isograptus victoriae

J

K
  • †Kaskia
  • †Kazakhstania
  • †Kochaspis
    • †Kochaspis maladensis – type locality for species
  • †Kochiella
  • †Kochina
    • †Kochina venusta – type locality for species
    • †Kochina vestita – type locality for species
    • †Kochina wasatchensis – type locality for species
  • †Kochiproductus
    • †Kochiproductus longus – or unidentified comparable form
  • †Komiella
    • †Komiella ostiolata – type locality for species
  • Fossil of the Cambrian trilobite Kootenia
    †Kootenia
    • †Kootenia acicularis – type locality for species
    • †Kootenia brevispina – type locality for species
    • †Kootenia convoluta – type locality for species
    • †Kootenia granulosa – type locality for species
    • †Kootenia idahoensis
    • †Kootenia maladensis – type locality for species
    • †Kootenia nitida – type locality for species
    • †Kootenia spencei
  • †Kozlowskia

L
  • †Lasiograptus
    • †Lasiograptus harknessi
  • †Leiorhynchoidea
    • †Leiorhynchoidea carbonifera
  • †Leiorhynchus
    • †Leiorhynchus carboniferum
    • †Leiorhynchus weeksi
  • †Leiostegium
    • †Leiostegium manitouense
  • †Leptagonia
    • †Leptagonia analoga
    • †Leptagonia missouriensis
  • †Leptograptus
    • †Leptograptus demissus – type locality for species
    • †Leptograptus flaccidus
  • †Licnocephala
    • †Licnocephala bicornuta – type locality for species
    • †Licnocephala cavigladius
    • †Licnocephala ovata – type locality for species
  • †Lingula
    • †Lingula carbonaria
  • Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella
    †Lingulella
    • †Lingulella eucharis – type locality for species
    • †Lingulella idahoensis – type locality for species
  • †Linoproductus
  • †Liosotella – or unidentified related form
  • †Lithostrontionella
  • †Lithostrotion
  • †Lithostrotionella
    • †Lithostrotionella pennsylvanicum
    • †Lithostrotionella stelcki
  • †Lithstrotionella
    • †Lithstrotionella pennsylvanicum
  • †Loganiella – type locality for genus
    • †Loganiella johnsoni – type locality for species
  • †Loganograptus
    • †Loganograptus logani
  • †Lordorthis – type locality for genus
    • †Lordorthis variabilis – type locality for species

M
  • †Macropotamorhyncus
    • †Macropotamorhyncus insolitus
  • †Macropyge
    • †Macropyge gladiator – type locality for species
  • †Maeandrograptus
    • †Maeandrograptus tau
  • Restoration of the mysterious Cambrian life-form Margaretia
    †Margaretia
    • †Margaretia angustata – type locality for species
  • †Martinia
  • †Menoparia
    • †Menoparia genalunata – type locality for species
    • †Menoparia lunalata – type locality for species
  • †Metabowmania
    • †Metabowmania latilimbata – or unidentified comparable form
  • †Metriophyllum
    • †Metriophyllum deminutivum
  • †Michelinia
  • †Micromitra
    • †Micromitra haydeni
    • †Micromitra lepida
  • †Minkella
  • †Monoclimacis
    • †Monoclimacis griestoniensis – or unidentified related form
  • Fossils of the Early Devonian graptolite Monograptus
    †Monograptus
    • †Monograptus argutus – or unidentified comparable form
    • †Monograptus convolutus
    • †Monograptus decipiens – or unidentified comparable form
    • †Monograptus flemingii – or unidentified comparable form
    • †Monograptus leptotheca – or unidentified comparable form
    • †Monograptus lobiferus
    • †Monograptus sedgwickii
  • †Mooreoceras – tentative report
  • †Morania
  • †Morozoviella
    • †Morozoviella praecurriensis

N
  • †Nanorthis – tentative report
  • Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis
    †Naticopsis
    • †Naticopsis tayloriana – type locality for species
  • †Nemagraptus
    • †Nemagraptus gracilis – or unidentified comparable form
  • †Neoeridotrypella
    • †Neoeridotrypella pulchra
  • †Neospirifer
  • †Neurograptus
    • †Neurograptus margaritatus
  • †Niobe – tentative report
  • †Nuculopsis
    • †Nuculopsis montpelierensis – type locality for species

O
  • †Obolus
  • †Oelandiella
    • †Oelandiella aequa – type locality for species
  • †Ogygopsis
    • †Ogygopsis magna – type locality for species
    • †Ogygopsis typicalis
  • Fossil of the Cambrian trilobite Olenoides
    †Olenoides
    • †Olenoides maladensis
  • †Orbiculoidea
    • †Orbiculoidea missouriensis
    • †Orbiculoidea wyomingensis
  • †Orbinaria
  • †Orthograptus
    • †Orthograptus calcaratus
    • †Orthograptus pageanus
    • †Orthograptus quadrimucronatus
    • †Orthograptus truncatus
    • †Orthograptus whitfieldi
  • †Orthoretiolites
    • †Orthoretiolites hami
  • †Orthotetes
    • †Orthotetes kaskaskiensis
  • †Orthotheca
    • †Orthotheca sola
  • †Oryctocara – type locality for genus
    • †Oryctocara geikei
    • †Oryctocara geikiei – type locality for species
  • †Oryctocare
  • †Oryctocephalites
    • †Oryctocephalites typicalis – type locality for species
  • †Oryctocephalus
    • †Oryctocephalus maladensis – type locality for species
    • †Oryctocephalus walcotti – type locality for species
  • †Ovatia
  • †Overtonia

P
  • †Pachyaspis
    • †Pachyaspis typicalis – type locality for species
  • †Pachycranium
    • †Pachycranium faciclunis – type locality for species
  • †Paenebeltella
    • †Paenebeltella vultulata – type locality for species
  • Fossil of the Cambrian trilobite Pagetia
    †Pagetia
    • †Pagetia clytia
    • †Pagetia fossula – type locality for species
    • †Pagetia maladensis – type locality for species
    • †Pagetia rugosa
  • †Palaeacis
    • †Palaeacis cuneiformis
  • Palaeoaplysina
  • †Palaeocoryne
  • †Palaeoneilo
    • †Palaeoneilo mcchesneyana – type locality for species
  • †Paleocoryne
  • †Parahystricurus
    • †Parahystricurus carinatus – type locality for species
    • †Parahystricurus fraudator – type locality for species
    • †Parahystricurus oculirotundus – type locality for species
    • †Parahystricurus pustulosus – type locality for species
  • †Paraorthograptus
    • †Paraorthograptus pacificus
  • †Parisograptus
    • †Parisograptus caduceus
  • †Paterina
    • †Paterina hirta – type locality for species
  • Illustration of a fossilized shell in multiple views of the Paleozoic mollusc Pelagiella.
    †Pelagiella
  • †Peltabellia
    • †Peltabellia peltabella – type locality for species
  • †Peneckiella
  • †Penniretepora
  • †Pericyclus
    • †Pericyclus decipiens – type locality for species
  • †Permastraea
    • †Permastraea solida
  • †Peronopsis
    • †Peronopsis bonnerensis
  • †Perrinites
    • †Perrinites hilli
  • †Petalograptus
    • †Petalograptus minor
  • †Petigurus – tentative report
  • Fossil of the Early Ordovician graptolite Phyllograptus
    †Phyllograptus
    • †Phyllograptus angustifolius
    • †Phyllograptus anna
    • †Phyllograptus ilicifolius
  • †Pilekia – tentative report
  • †Plaesiomys
    • †Plaesiomys subquadrata
  • †Platyceras
  • †Platycrinites
  • †Platycrinus
  • Fossilized shell of the Middle Ordovician-Silurian brachiopod Platystrophia
    †Platystrophia
    • †Platystrophia equiconvexa – or unidentified comparable form
  • †Pleurograptus
    • †Pleurograptus linearis
  • †Polidevcia
    • †Polidevcia obesa
  • †Poliella
    • †Poliella anteros
    • †Poliella caranus
  • †Politicurus
    • †Politicurus politus – type locality for species
  • †Polypora
  • †Poulsenia
    • †Poulsenia granosa – type locality for species
    • †Poulsenia occidens – type locality for species
  • †Primaspis
  • †Prodentalium
    • †Prodentalium canna
  • Restoration of the Silurian trilobite Proetus
    †Proetus
  • †Prolecanites – tentative report
    • †Prolecanites lyoni
  • †Prospira
    • †Prospira albapinensis – or unidentified comparable form
  • †Protoconchioides
    • †Protoconchioides douli – type locality for species
  • †Protopliomerella
    • †Protopliomerella contracta
  • †Protospongia
  • †Prozacanthoides
    • †Prozacanthoides aequus – type locality for species
    • †Prozacanthoides alatus – type locality for species
    • †Prozacanthoides decorosus – type locality for species
    • †Prozacanthoides exilis – type locality for species
    • †Prozacanthoides optatus – type locality for species
  • †Psalikilopsis
    • †Psalikilopsis cuspidicauda – type locality for species
  • †Psalikilus
    • †Psalikilus typicum – type locality for species
  • †Pseudagnostus
  • †Pseudisograptus
    • †Pseudisograptus dumosus
  • †Pseudobatostomella
    • †Pseudobatostomella decora
    • †Pseudobatostomella kamiensis
  • †Pseudoclelandia
    • †Pseudoclelandia cornupsittaca – type locality for species
    • †Pseudoclelandia fluxafissura – type locality for species
    • †Pseudoclelandia lenisora – type locality for species
  • †Pseudoclimacograptus
    • †Pseudoclimacograptus scharenbergi
  • †Pseudocystophora
    • †Pseudocystophora complexa
  • †Pseudodorlodotia
  • †Pseudogastrioceras
  • †Pseudohystricurus
    • †Pseudohystricurus obesus – type locality for species
    • †Pseudohystricurus orbus – type locality for species
    • †Pseudohystricurus rotundus – type locality for species
  • †Pseudomonotis
  • †Ptarmigania
    • †Ptarmigania agrestis – type locality for species
    • †Ptarmigania altilis – type locality for species
    • †Ptarmigania aurita – type locality for species
    • †Ptarmigania dignata – type locality for species
    • †Ptarmigania exigua – type locality for species
    • †Ptarmigania germana – type locality for species
    • †Ptarmigania natalis – type locality for species
    • †Ptarmigania ornata – type locality for species
    • †Ptarmigania sobrina – type locality for species
  • †Ptychaspis
  • †Pugnoides
    • †Pugnoides quinqueplecis
  • †Punctospirifer
    • †Punctospirifer solidirostris
    • †Punctospirifer transversus
  • †Pyraustocranium
    • †Pyraustocranium orbatum – type locality for species

Q

R
  • †Rafinesquina – tentative report
  • †Rasettia – tentative report
  • †Rectograptus
    • †Rectograptus amplexicaulis
  • †Remopleuridiella
    • †Remopleuridiella caudalimbata – type locality for species
  • †Reteoeraotus
  • †Reteograptus
    • †Reteograptus geinitzianus
    • †Reteograptus pulcherrimus – or unidentified comparable form
  • †Reticulariina
    • †Reticulariina spinosa
  • †Rhipidomella
    • †Rhipidomella arkansana
    • †Rhipidomella diminutiva
    • †Rhipidomella missouriensis
    • †Rhipidomella nevadensis
  • †Rhombopora
  • †Rhynchopora
    • †Rhynchopora taylori – type locality for species
  • †Rhyncopora
  • †Rhynoleichus
    • †Rhynoleichus weeksi
  • †Rossaspis
    • †Rossaspis superciliosa – type locality for species
  • †Rossicurus
  • †Rotopericyclus
    • †Rotopericyclus pinyonensis – type locality for species
  • †Rugosochonetes
    • †Rugosochonetes loganensis – or unidentified comparable form
  • †Ruzhencevia
    • †Ruzhencevia incrustata
  • †Rylstonia

S
  • †Sanguinolites
    • †Sanguinolites carbonaria – type locality for species
  • †Saratogia
  • †Scaphellina – tentative report
  • †Schistometopus – type locality for genus
    • †Schistometopus typicalis – type locality for species
  • †Schizodus
    • †Schizodus bifidus
    • †Schizodus ferrieri – type locality for species
  • †Schizograptus
  • †Schizophoria
    • †Schizophoria depressa
    • †Schizophoria poststriatula – or unidentified comparable form
    • †Schizophoria resupinata
  • †Schuchertella
  • †Scinocephalus
    • †Scinocephalus quadrihastatus – type locality for species
    • †Scinocephalus solitecti – type locality for species
  • Fossil of the Cambrian priapulid worm Selkirkia
    †Selkirkia
    • †Selkirkia spencei
  • †Septopora
  • †Setigerites
  • †Shamovella
  • †Siphonodendron
  • †Spencia
    • †Spencia plena
  • †Sphenosteges
  • †Spirifer
    • †Spirifer albertensis
    • †Spirifer bifurcatus
    • †Spirifer biplicoides
    • †Spirifer brazerianus
    • †Spirifer forbesi
    • †Spirifer osagensis
    • †Spirifer pellaensis
    • †Spirifer rowleyi
  • †Spiriferina
  • †Spirolegoceras – type locality for genus
    • †Spirolegoceras fischeri – type locality for species
  • †Stacheoceras
    • †Stacheoceras sexlobatum – type locality for species
  • †Stachyodes
  • †Stauroholcus
    • †Stauroholcus typicalis
  • †Stenoconites – type locality for genus
    • †Stenoconites idahoensis – type locality for species
  • †Stenolobulites
    • †Stenolobulites simulator – type locality for species
    • †Stenolobulites sinuosus – type locality for species
  • †Stenopora
    • †Stenopora grandis
  • †Straparollus
    • †Straparollus ophirensis
  • †Stratifera
    • †Stratifera brazeriana
  • †Streblochondria
  • †Streblopteria
    • †Streblopteria montpelierensis – type locality for species
  • †Striatifera
  • Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
    †Strophomena
  • †Subglobosochonetes
    • †Subglobosochonetes norquayensis
  • †Sulcoretepora
  • †Symphysurina
    • †Symphysurina illaenoides
  • †Syntrophopsis
    • †Syntrophopsis polita – or unidentified comparable form
    • †Syntrophopsis transversa
  • †Syringopora
    • †Syringopora surcularia
    • †Syringopora surcularis

T
  • †Tabantaloceras
  • †Tabulipora
  • †Taenicephalina
  • †Taenicephalus
  • †Tesselacauda
    • †Tesselacauda depressa – type locality for species
  • †Tetracamera
  • Fossils of the Early-Late Ordovician graptolite Tetragraptus
    †Tetragraptus
    • †Tetragraptus amii
    • †Tetragraptus pseudobigsbyi
    • †Tetragraptus quadribrachiatus
  • †Tetralobula – tentative report
  • †Tetraporinus
  • †Tetrataxis
  • †Thamnopora
  • †Thoracocare
    • †Thoracocare minuta
  • †Timaniella
    • †Timaniella pseudocamerata
  • †Toernquistia – tentative report
  • †Tonkinella
    • †Tonkinella idahoensis – type locality for species
  • †Torynifer
    • †Torynifer cooperensis
    • †Torynifer pseudolineata
  • †Trigonocerca
    • †Trigonocerca typica
  • †Triticites
  • †Tritoechia
  • †Tschussovskenia
    • †Tschussovskenia connorsensis

U
  • †Unispirifer
    • †Unispirifer minnewankensis
  • †Urotheca
    • †Urotheca sampsoni – type locality for species
  • †Utia
    • †Utia curio

V
  • †Vanuxemella
    • †Vanuxemella idahoensis – type locality for species
  • †Vesiculophyllum
  • †Vistoia – tentative report
    • †Vistoia minuta
  • †Vnigripecten
    • †Vnigripecten phosphaticus

W
  • †Werriea
    • †Werriea australis
  • †Wilbernia
  • †Wilkingia
    • †Wilkingia walkeri
  • †Wilsonastraea
    • †Wilsonastraea smithi
  • †Wimanella
    • †Wimanella maladensis – type locality for species
    • †Wimanella nautes
    • †Wimanella rara
    • †Wimanella spencei
  • †Worthenia – tentative report

X
  • †Xenostegium
    • †Xenostegium franklinense – type locality for species
    • †Xenostegium taurus

Y
  • †Yakovlevia
    • †Yakovlevia geniculata – type locality for species
    • †Yakovlevia multistriatus

Z
  • †Zacanthoides
    • †Zacanthoides abbreviatus
    • †Zacanthoides adjunctus
    • †Zacanthoides gradatus
    • †Zacanthoides holopygous
    • †Zacanthoides holopygus
    • †Zacanthoides idahoensis – type locality for species
    • †Zacanthoides sampsoni – type locality for species
    • †Zacanthoides serratus
  • †Zaphrenthis – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Zaphrenthis compressus
  • †Zaphrentites
    • †Zaphrentites spinulosus
  • †Zygospira
    • †Zygospira circularis – or unidentified comparable form
    • †Zygospira lebanonensis – or unidentified comparable form

References
  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021. {{cite web}}: |author= has generic name (help)
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