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
 * Agnostus pisiformis Kinnekulle 1 CRF.jpg †[[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
 * Atrypa reticularis pedunculate Gondelsheim CRF.jpg †[[Atrypa]]
 * †Atrypa oneidensis – type locality for species
 * †Atrypa putilla – or unidentified related form
 * †Aulopora
 * †Auloprotonia
 * †Austinella
 * †Austinella whitfieldi – or unidentified related form
 * †Aviculopecten
 * †Aviculopecten kaibabensis – or unidentified comparable form
 * † 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
 * †Chonetes logani
 * †Clappaspis
 * †Clappaspis coriacea
 * †Clappaspis dotis
 * †Clappaspis idahoensis
 * †Clappaspis lanata
 * †Clappaspis spencei
 * †Clavaspidella
 * †Clavaspidella bithus
 * †Clavaspidella minor – type locality for species
 * †Cleiothryidina
 * †Cleiothyridina
 * †Cleiothyridina miettensis
 * †Cleiothyridina obmaxima
 * †Cleiothyridina sublamellosa
 * †Cleiothyridina tenuilineata
 * †Cleiothyridinia
 * †Clelandia
 * †Clelandia utahensis – type locality for species
 * Climacograptus wilsoni Graptolite Fossils from Dob%27s Linn Scotland.jpg †[[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
 * Compositafossil.jpg †[[Composita]]
 * †Composita humilis
 * †Composita humulis
 * †Composita idahoensis – type locality for species
 * †Composita mira – or unidentified comparable form
 * †Composita sigma
 * †Composita subquadrata
 * †Composita subtilita – or unidentified comparable form
 * †Composita sulcata
 * †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
 * Didymograptus murchisoni small.jpg †[[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
 * Elrathia kingii growth series.jpg †[[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
 * Euomphalus fossil cropped.png †[[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
 * Gogia kitchnerensis 01.jpg †[[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
 * Helicoprion bessonovi cropped.png †[[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
 * Hyoliths01.JPG]] †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

 * †Juresania

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
 * Kootenia fossil cropped.png †[[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
 * Lingulella caelata 1.png †[[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
 * Margaretia dorus Reconstruction.png †[[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
 * Spirograptus spiralis cropped.jpg †[[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
 * Neritopsidae - Naticopsis.JPG †[[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
 * [[File:Olenoides superbus, Late Middle Cambrian, Upper Marjum Formation, House Range, Millard County, Utah, USA - Houston Museum of Natural Science - DSC01415.JPG|thumb|upright=0.672|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
 * Pagetia taijiangensis 2.jpg †[[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
 * Pelagiella atlantoides cropped.png †[[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
 * Phyllograptidae - Phyllograptus species cropped.jpg †[[Phyllograptus]]
 * †Phyllograptus angustifolius
 * †Phyllograptus anna
 * †Phyllograptus ilicifolius
 * †Pilekia – tentative report
 * †Plaesiomys
 * †Plaesiomys subquadrata
 * †Platyceras
 * †Platycrinites
 * †Platycrinus
 * PlatystrophiaOrdovician.jpg †[[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
 * Proetus concinnus reconstruction cropped.png †[[Proetus (trilobite)|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

 * †Quadratia
 * †Quadratia hirsutiformis

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
 * Selkirkia columbia ROM63131.jpg †[[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
 * Strophomena costellata brachial.jpg †[[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
 * Graptolite tetragraptus cropped.jpg †[[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