List of the Paleozoic life of California

This list of the Paleozoic life of California contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of California and are between 538.8 and 252.17 million years of age.

A

 * †Acanthopecten
 * †Acidiphorus
 * †Acidiphorus hesperia
 * †Advenella
 * †Advenella bifurcata
 * †Agathiceras
 * †Alaskospira
 * †Alaskospira dunbari – or unidentified comparable form
 * †Albertella
 * †Albertella longwelli
 * †Alitaria – tentative report
 * †Allosaccus – tentative report
 * †Alokistocare
 * †Alokistocarella
 * †Alokistocarella brighamensis – or unidentified comparable form
 * †Amblysiphonella
 * †Amblysiphonella grossa
 * †Amblysiphonelloides
 * †Amblysiphonelloides reticulata
 * †Amblysiphonelloides tubulara
 * †Ambocoelia – tentative report
 * †Amecephalus
 * †Amecephalus arrojosensis
 * †Ampyx – tentative report
 * †Ampyx
 * †Ampyx compactus
 * †Anidanthus
 * †Anidanthus shastensis – type locality for species
 * †Annuliconcha
 * †Anomalorthis
 * †Anoptambonites
 * †Anoptambonites myiomorpheus – type locality for species
 * †Anoptambonites myriomorpheus
 * †Antiquatonia
 * †Apatolichas
 * †Arceodomus
 * †Arceodomus langenheimi – type locality for species
 * †Archaeoscyphia
 * †Archaeoscyphia mazourkaensis – type locality for species
 * †Arcullina
 * †Arcullina polaris – or unidentified related form
 * †Arcuolenellus
 * †Arcuolenellus megafrontalis – or unidentified comparable form
 * Large Aspidella.jpg †[[Aspidella]] – tentative report
 * †Aspidella terranovica
 * †Astartella
 * †Atrypa
 * †Atrypa reticularis
 * †Atrypella
 * †Atrypella tenuis – or unidentified comparable form
 * †Atrypoidea – tentative report
 * †Aulophyllum – tentative report
 * †Austinella
 * †Austinella kankakensis – or unidentified related form
 * †Austinella kankakesis – or unidentified related form
 * Aviculopecten subcardiformis01.JPG †[[Aviculopecten]]
 * †Aviculopecten dissimilis
 * †Aviculopecten fimbriatus
 * †Aviculopecten occidentalis – or unidentified comparable form

B

 * †Bakevellia
 * †Bathymyonia
 * †Bathymyonia nevadensis – or unidentified comparable form
 * †Bayhaium
 * †Bayhaium merriamorum
 * †Bayhaium virginiae – type locality for species
 * †Bellefontia
 * †Beraunia
 * †Beraunia bifrons – or unidentified comparable form
 * †Bicarina
 * †Bicarina petilitornata
 * †Biformispira – type locality for genus
 * †Biformispira isaacsoni – type locality for species
 * †Bighornia
 * †Bimuria
 * †Blastoidocrinus
 * †Blastoidocrinus carchariaedens – or unidentified comparable form
 * †Bolbolenellus
 * †Bolbolenellus brevispinus
 * †Bolbolenellus euryparia
 * †Bonnia
 * †Boucotspira – type locality for genus
 * †Boucotspira fimbriata – type locality for species
 * †Brachyprion
 * †Brachyprion seretensis – or unidentified comparable form
 * Bristolia mohavensis 2x CRF.jpg †[[Bristolia]]
 * †Bristolia anteros
 * †Bristolia brachyomma
 * †Bristolia bristolensis
 * †Bristolia fragilis
 * †Bristolia insolens
 * †Bristolia mohavensis
 * †Bryorhynchus – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Bryorhynchus bisulcatum
 * †Bumastus
 * †Buxtonia
 * †Buxtonia scabriculoides
 * †Buxtonia websteri – or unidentified comparable form

C

 * †Calycocoelia
 * †Calycocoelia typicalis – type locality for species
 * Calymene clavicula dorsal.jpg †[[Calymene]]
 * †Camarotoechia – tentative report
 * †Cancrinella
 * †Cancrinella phosphatica
 * †Cancrinella undata
 * †Carolinites
 * †Carolinites genacinaca
 * †Carolinites sibiricus
 * †Chalaroschwagerina
 * †Chalaroschwagerina inflata – type locality for species
 * †Chalaroschwagerina obesa – type locality for species
 * †Chalaroschwagerina pulchra – type locality for species
 * †Chalaroschwagerina tumentis – type locality for species
 * †Cheilocephalus
 * †Chonetes
 * †Chonetinella
 * †Choristitella
 * †Cladopora
 * †Clavicosta – tentative report
 * †Cleiothyridina
 * †Clelandia
 * †Clelandia aspina
 * †Clelandia bispina
 * †Cliefdenella
 * †Cliefdenella alaskaensis
 * †Clisiophyllum
 * †Clisiophyllum gabbi
 * †Clisiophyllum oweni – type locality for species
 * Compositafossil.jpg †[[Composita]]
 * †Composita grandis – or unidentified comparable form
 * †Composita subtilita – or unidentified comparable form
 * †Conchidium
 * †Conchidium biloculare – or unidentified comparable form
 * †Conocardium
 * †Cordillerastraea
 * †Cordillerastraea inyoensis – type locality for species
 * †Cornwallatia
 * †Cornwallatia tabularia
 * †Corymbospongia
 * †Corymbospongia adnata
 * †Corymbospongia mica
 * †Corymbospongia perforata
 * †Costispinifera – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Costispinifera costata – tentative report
 * †Crenulosepta
 * †Crenulosepta delicata – type locality for species
 * †Crenulosepta fusiformis – type locality for species
 * †Crenulosepta inyoensis – type locality for species
 * †Crenulosepta rossi – type locality for species
 * †Crenulosepta wahlmani – type locality for species
 * †Crurithyris
 * Cruziana Brallier Harrell Devonian.jpg †[[Cruziana]]
 * †Cuniculinella
 * †Cuniculinella acuta – type locality for species
 * †Cuniculinella ampla – type locality for species
 * †Cuniculinella calx
 * †Cuniculinella extensa – type locality for species
 * †Cuniculinella fusiformis – type locality for species
 * †Cuniculinella mojavensis – type locality for species
 * †Cuniculinella munda – type locality for species
 * †Cuniculinella parva – type locality for species
 * †Cuniculinella solita – type locality for species
 * †Cuniculinella tumida – type locality for species
 * †Cuniculinella ventricosa – type locality for species
 * †Cyathactis
 * †Cyathactis gazellensis – type locality for species
 * †Cybelurus
 * Cyclolobidae - Cyclolobus walkeri.JPG †[[Cyclolobus]]
 * †Cyclolobus walkeri
 * †Cyclonema
 * †Cyclonema bilix – or unidentified comparable form
 * †Cymbidium
 * †Cyrtina
 * †Cystiphyllum
 * †Cystothalamiella
 * †Cystothalamiella craticula
 * †Cystothalamiella ducta
 * †Cystothalamiella tuboides

D

 * Daguinaspis sp CRF.jpeg †[[Daguinaspis]]
 * †Dalejina
 * †Dalmanella
 * †Dalmanophyllum
 * †Dalmanophyllum dalmani – or unidentified comparable form
 * †Darwasophyllum – tentative report
 * †Deacheospira
 * †Deacheospira hotzi – type locality for species
 * †Deltopecten – tentative report
 * †Derbyia
 * †Diacanthaspis
 * †Dicellograptus
 * †Dicoelosia
 * †Dicoelosia conspicua – or unidentified related form
 * †Dicoelosia jonesridgenesis
 * †Dicoelosia jonesridgensis
 * †Dictyoclostus – report made of unidentified related form or using admittedly obsolete nomenclature
 * Didymograptus murchisoni small.jpg †[[Didymograptus]]
 * †Didymograptus protobifidus
 * †Dimeropygiella
 * †Dimeropygiella caudanodosa
 * †Diochthofera
 * †Diochthofera conspicua
 * †Diplanus
 * †Diplanus stanleyi
 * †Diplichnites
 * †Discomyorthis
 * †Discotropis – tentative report
 * †Dolerorthis
 * †Donaldiella
 * †Donaldiella derwiduii – or unidentified comparable form
 * †Dorsoscyphus
 * †Dorsoscyphus johnsoni
 * †Durhamina
 * †Durhamina kenneyi – type locality for species
 * †Dyticospirifer

E

 * †Eccyliopterus
 * †Eccyliopterus regularis – or unidentified related form
 * †Echinauris
 * †Echinauris subhorrida
 * †Echinoconchus
 * †Echinoconchus punctatus
 * †Ectenonotus
 * †Ectenonotus raymondi – or unidentified comparable form
 * †Ectenonotus westoni – or unidentified comparable form
 * †Ectenonotus whittingtoni
 * †Ectomaria
 * †Ectomaria callahanensis – type locality for species
 * †Ectomaria prisca
 * †Elasmothyris
 * †Elasmothyris limata – type locality for species
 * †Encrinurus
 * Endoceras.JPG †[[Endoceras]] – tentative report
 * †Enigmalites
 * †Enigmalites roberti – type locality for species
 * †Eofletcheria
 * †Eomarginifera
 * †Eoparafusulina
 * †Eoparafusulina alta – type locality for species
 * †Eoparafusulina brevis – type locality for species
 * †Eoparafusulina certa – type locality for species
 * †Eoparafusulina contracta – type locality for species
 * †Eoparafusulina cylindrica – type locality for species
 * †Eoparafusulina depressa – type locality for species
 * †Eoparafusulina gracilis
 * †Eoparafusulina linearis
 * †Eoparafusulina minuta – type locality for species
 * †Eoparafusulina modica – type locality for species
 * †Eoparafusulina nitida – type locality for species
 * †Eoparafusulina ovata – type locality for species
 * †Eoparafusulina parva – type locality for species
 * †Eoparafusulina potterensis – type locality for species
 * †Eoparafusulina proba – type locality for species
 * †Eoparafusulina regularis – type locality for species
 * †Eoparafusulina rotunda – type locality for species
 * †Eoparafusulina spissa – type locality for species
 * †Eoparafusulina tarda – type locality for species
 * †Eoparafusulina tenuitheca – type locality for species
 * †Eoparafusulina thompsoni
 * †Eotomaria
 * †Eotomaria perryi – type locality for species
 * †Epitomyonia
 * †Epitomyonia recilina
 * †Epitomyonia relicina
 * †Eridmatus
 * †Eridmatus texanus – or unidentified comparable form
 * †Eridorthis
 * †Eripnifera – type locality for genus
 * †Eripnifera praecipitis – type locality for species
 * †Etheripecten
 * †Euconospira
 * †Eunema
 * †Eunema strigillatum – or unidentified comparable form
 * †Euomphalopterus – tentative report
 * Euomphalus fossil cropped.png †[[Euomphalus]]
 * †Eurogrewingkia
 * †Eurogrewingkia penobscotensis
 * †Eusphairica – type locality for genus
 * †Eusphairica distubula – type locality for species

F

 * Fallotaspis longa.png †[[Fallotaspis]]
 * †Favosites
 * †Fenestella
 * †Fieldaspis
 * †Fluctuaria
 * †Fomichevella
 * †Fomichevella major – or unidentified comparable form
 * †Fomichevella nevadensis

G

 * †Gallatinospongia
 * †Gallatinospongia conica
 * †Girtyocoelia
 * †Girtyocoelia epiporata
 * †Girtyocoelia tubula
 * †Glassia – tentative report
 * †Globonema
 * †Globonema niota – or unidentified comparable form
 * †Glossopleura
 * †Glossopleura lodensis
 * †Glossopleura walcotti
 * †Glyptorthis
 * Gogia ojenai.jpg †[[Gogia]]
 * †Gogia ojenai – type locality for species
 * †Goniostropha
 * †Goniostropha bachelieri – or unidentified comparable form
 * †Gshelia
 * †Gshelia americana – type locality for species
 * †Gypidula

H

 * †Halysites
 * †Heintzella
 * †Heintzella applegatei – type locality for species
 * †Heintzella playfordi
 * †Helicoplacus
 * †Helicoplacus gilberti
 * Helicoprion bessonovi cropped.png †[[Helicoprion]]
 * †Helicoprion davisii
 * †Helicotoma
 * †Helicotoma griffinorum – type locality for species
 * †Heliolites
 * †Heliomeroides
 * †Hercynella
 * †Hercynella bohemica – or unidentified comparable form
 * †Heritschiella
 * †Heritschiella girtyi
 * †Heritschioides
 * †Heritschioides carneyi – type locality for species
 * †Heritschioides hammani – type locality for species
 * †Heritschioides wexoi – type locality for species
 * †Hesperocoelia
 * †Hesperocoelia undulata
 * †Hesperorthis
 * †Hesperorthis dubia – or unidentified comparable form
 * †Hesperorthis evenkiensis
 * †Heterocaninia
 * †Heterocaninia langenheimi – type locality for species
 * Holopeidae - Holopea praestans.JPG †[[Holopea]]
 * †Holopea brucei – type locality for species
 * †Holopea elizabethi – type locality for species
 * †Holopea glindmeyeri – type locality for species
 * †Holopea symmetrica – or unidentified comparable form
 * †Hormotoma
 * †Howellella
 * †Howellella smithi – or unidentified comparable form
 * †Hustedia
 * †Hustedia compressa
 * †Hyalostelia
 * †Hyolithes
 * †Hystricurus

I

 * Illaenidae - Illaenus tauricornis.JPG †[[Illaenus]]
 * †Imperatoria
 * †Imperatoria irregularis
 * †Imperatoria media
 * †Imperatoria mega
 * †Imperatoria minima
 * †Ingria
 * †Inyoschwagerina
 * †Inyoschwagerina elayeri – type locality for species
 * †Inyoschwagerina elongata – type locality for species
 * †Inyoschwagerina inflata – type locality for species
 * †Inyoschwagerina linderae – type locality for species
 * †Inyoschwagerina magnifica – type locality for species
 * †Inyoschwagerina mira – type locality for species
 * †Inyoschwagerina rotunda – type locality for species
 * †Inyoschwagerina turgida
 * †Ischyrotoma
 * †Iskutella
 * †Iskutella fergusoni – type locality for species
 * †Isogramma
 * †Isogramma pachti
 * †Isorthis – tentative report
 * Isotelus brachycephalus.JPG †[[Isotelus]]
 * †Isotelus spurius

K

 * †Kabyaipecten
 * †Karavankina
 * †Kawina
 * †Kawina scrobiculus
 * †Kirkirhynchus
 * †Kirkirhynchus reesidei – or unidentified comparable form
 * †Kitakamithyris
 * †Klamathastraea – type locality for genus
 * †Klamathastraea dilleri – type locality for species
 * †Klamathina
 * †Klamathina elongata – type locality for species
 * †Klamathina simplex – type locality for species
 * †Klamathina singularis – type locality for species
 * †Kleopatrina – type locality for genus
 * †Kleopatrina mccloudensis – type locality for species
 * †Kleopatrina raubae – type locality for species
 * †Komiella
 * †Komiella ostiolata – or unidentified comparable form
 * †Krotovia
 * Kutorgina cingulata.png †[[Kutorgina]]
 * †Kyphophyllum
 * †Kyphophyllum greggi – type locality for species

L

 * †Langenheimia – type locality for genus
 * †Langenheimia klamathensis – type locality for species
 * †Laticrura
 * †Laticrura erecta – or unidentified related form
 * †Leioclema – tentative report
 * †Leperditia
 * †Leperditia bivia
 * †Leptellina
 * †Leptodus
 * †Leptodus nobilis – or unidentified related form
 * †Leptostrophia – tentative report
 * †Leptotriticites
 * †Leptotriticites americanus – or unidentified related form
 * †Leptotriticites californicus
 * †Leptotriticites glenensis
 * †Leptotriticites gracilitatus – or unidentified comparable form
 * †Leptotriticites hatchetensis – or unidentified related form
 * †Leptotriticites hughesensis – or unidentified comparable form
 * †Leptotriticites koschmanni – or unidentified comparable form
 * †Leptotriticites panamintensis – type locality for species
 * †Leptotriticites varius – or unidentified comparable form
 * †Leptotriticites warmspringensis – type locality for species
 * †Leptotriticites wetherensis
 * †Lingula
 * Lingulella caelata 1.png †[[Lingulella]]
 * †Linoproductus
 * †Linoproductus nasutus – tentative report
 * †Linsleyella – type locality for genus
 * †Linsleyella greggi – type locality for species
 * †Linsleyella johnsoni – type locality for species
 * †Liosotella
 * †Liosotella cooperi – type locality for species
 * †Liospira
 * †Liospira modesta
 * †Lissocoelia
 * †Lissocoelia ramosa
 * †Lissomarginifera
 * †Lissomarginifera shastensis
 * †Lithostrotion
 * †Lithostrotion pauciradiale
 * Lonchodomas mcgeheei CRF.jpg †[[Lonchodomas]]
 * †Lophospira
 * †Lophospira milleri – or unidentified comparable form
 * †Lophospira perangulata
 * †Loxonema – tentative report
 * †Lytvophyllum – tentative report

M

 * †Maclurites
 * †Maclurites crassa – or unidentified related form
 * †Maclurites klamathensis – type locality for species
 * †Malpaisia – type locality for genus
 * †Malpaisia maceyi – type locality for species
 * †Meekella
 * †Megakozlowskiella
 * †Megalomphala – tentative report
 * †Megalomphala contorta
 * Meristella two views.png †[[Meristella]]
 * †Meristella robertsensis – or unidentified comparable form
 * †Mesocoelia
 * †Mesocoelia janus – or unidentified comparable form
 * †Mesodouvillina – tentative report
 * †Mestoronema
 * †Mestoronema marginalis – or unidentified comparable form
 * †Mexicaspis
 * †Mexicaspis radiatus
 * †Mexicella
 * †Mexicella grandoculus
 * †Mexicella mexicana
 * †Mexicella robusta
 * †Mexicella stator – tentative report
 * †Michelinia
 * †Michelinia nelsoni – type locality for species
 * †Micromitra
 * †Microryctocara
 * †Microryctocara nevadensis
 * †Monocraterion
 * †Monodiexodina – tentative report
 * †Mooreoceras
 * †Mucophyllum
 * †Mucophyllum mcintyrei – or unidentified comparable form
 * †Murchisonia
 * †Murchisonia bilineata – or unidentified comparable form

N

 * †Neilsonia
 * †Neochonetes
 * †Neochonetes pseudoliratus – or unidentified related form
 * †Neomultithecopora
 * †Neomultithecopora mccutcheonae
 * †Neomultithecopora providensis – type locality for species
 * †Neomultithecopora sandoi – type locality for species
 * Trigonotretidae - Neospirifer ravana.JPG †[[Neospirifer]]
 * †Neosyringopora
 * †Neosyringopora multattenuata
 * †Nephrolenellus
 * †Nephrolenellus multinodus
 * †Nevadatubuls
 * †Nevadatubuls dunfee
 * †Nevadatubulus
 * †Nevadatubulus dunfee
 * Nevadella eucharis USNM PAL 60079.jpg †[[Nevadella]]
 * †Nigribaccinus
 * †Nigribaccinus elegans – type locality for species
 * †Nigribaccinus giganteus – type locality for species
 * †Nigribaccinus nestelli – type locality for species
 * †Nileus
 * †Nileus hesperaffinis
 * †Nucleospira
 * †Nucleospira ventricosa – or unidentified comparable form
 * †Nuculavus
 * †Nuculites
 * †Nyella
 * †Nyella clinolimbata – tentative report

O

 * †Obolella
 * †OIenellus
 * †OIenellus gilberti
 * Olenellus clarki 37mm CRF.jpeg †[[Olenellus]]
 * †Olenellus arcuatus
 * †Olenellus clarki
 * †Olenellus cylindricus
 * †Olenellus euryparia
 * †Olenellus fowleri – or unidentified comparable form
 * †Olenellus frementi
 * †Olenellus fremonti
 * †Olenellus gilberti
 * †Olenellus howelli
 * †Olenellus multinodus
 * †Olenellus nevadensis
 * †Olenellus puertoblancoensis
 * †Olenellus terminatus
 * †Olenellus transifans – or unidentified comparable form
 * †Olenellus transiftans – or unidentified comparable form
 * †Olenellus transitans – or unidentified comparable form
 * †Olenellus turmalis – or unidentified comparable form
 * †Omphalotrochus
 * †Omphalotrochus whitneyi – type locality for species
 * †Onchocephalites
 * †Onchocephalites claytonensis – type locality for species
 * †Onchocephalites laevis
 * †Ophiletina
 * †Ophiletina sublaxa – or unidentified related form
 * †Orbiculoidea
 * †Orbiculoidea damanensis
 * †Orthambonites
 * †Orthambonites decipiens
 * †Orthambonites eucharis
 * †Orthambonites mazousbensis
 * †Orthambonites minisculus
 * †Orthambonites minusculus
 * †Orthambonites patulus
 * †Orthidiella
 * †Orthidiella extensa
 * †Orthophyllum – tentative report
 * †Orthotetes
 * †Orthotichia
 * †Orthotichia nawtawaketensis
 * †Oryctocephalites
 * †Oryctocephalites resseri
 * †Oryctocephalus
 * †Oryctocephalus indicus
 * †Oryctocephalus nyensis
 * †Oryctocephalus orientalis
 * †Ovatia

P

 * †Pachystrophia – tentative report
 * †Pachystrophia devexa – or unidentified comparable form
 * †Pacificocoelia
 * †Paladin
 * Palaeoaplysina
 * †Palaeomphalus
 * †Palaeomphalus olsoni – type locality for species
 * †Palaeophycus
 * †Palaeophyllum
 * †Paleochiton
 * †Paleochiton siskiyouensis – type locality for species
 * †Palliseria
 * †Paraantagmus
 * †Paraantagmus latus
 * †Parafusulina
 * †Parafusulina bakeri – or unidentified comparable form
 * †Parafusulina californica
 * †Parafusulina cerrogordoensis – type locality for species
 * †Parafusulina complexa – type locality for species
 * †Parafusulina durhami – or unidentified related form
 * †Parafusulina halli – type locality for species
 * †Parafusulina juncea – type locality for species
 * †Parafusulina klamathensis – type locality for species
 * †Parafusulina maleyi
 * †Parafusulina mccloudensis – type locality for species
 * †Parafusulina nosonensis
 * †Parafusulina owensensis – type locality for species
 * †Parafusulina potterensis – type locality for species
 * †Parafusulina shaksgamensis – or unidentified comparable form
 * †Parafusulina splendens
 * †Parafusulina ubehebensis – type locality for species
 * †Parafusulina virga
 * †Paraheritschioides
 * †Paraheritschioides californiense – or unidentified related form
 * †Paraheritschioides stevensi – type locality for species
 * †Paralbertella
 * †Paralenorthis
 * †Paralenorthis marshalli
 * †Paralenorthis parcicrassicostatus – or unidentified comparable form
 * †Paralenorthis parvicrassicostata – or unidentified comparable form
 * †Paralenorthis parvicrassicostatus – or unidentified comparable form
 * †Paraliospira – type locality for genus
 * †Paraliospira angulata
 * †Paraliospira gradata – type locality for species
 * †Paraliospira helena
 * †Paraliospira mundula
 * †Paraliospira planata – type locality for species
 * †Parallelodon
 * †Parallelodon cingulatus
 * †Parallelodon qinghaiensis
 * †Parallelodon verneuilianus
 * †Paramesolobus – tentative report
 * †Paramesolobus sinuosus – or unidentified comparable form
 * †Pararachnastraea
 * †Pararachnastraea bellula – type locality for species
 * †Pararachnastraea delicata – type locality for species
 * †Pararachnastraea mckibbinae – type locality for species
 * †Pararachnastraea owensensis – type locality for species
 * †Pararachnastraea peggyae – type locality for species
 * †Pararachnastraea wilsoni – type locality for species
 * †Paraschwagerina
 * †Paraschwagerina crassitheca – type locality for species
 * †Paraschwagerina elongata – type locality for species
 * †Paraschwagerina fairbanksi – type locality for species
 * †Paraschwagerina fax
 * †Paraschwagerina magna – type locality for species
 * †Paraschwagerina tarda – type locality for species
 * †Patellispongia
 * †Patellispongia oculata – or unidentified comparable form
 * †Patriaspirifer
 * †Patriaspirifer kobehana
 * †Paupospira
 * †Paupospira sumnerensis – or unidentified related form
 * †Paurorthis
 * Peachella iddingsi cropped.jpg †[[Peachella]]
 * †Peachella brevispina
 * †Peachella iddingsi
 * †Peniculauris – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Peniculauris bassi
 * †Pentamerus
 * †Perditocardinia
 * †Permophorus
 * †Pernopecten
 * †Perrinites
 * †Perrinites hilli
 * †Peruniscus
 * †Petalaxis
 * †Petalaxis allisonae – type locality for species
 * †Petalaxis besti – type locality for species
 * †Petalaxis exiguus – type locality for species
 * †Petalaxis occidentalis
 * †Petalaxis sutherlandi – type locality for species
 * †Petrozium
 * †Petrozium staufferi – type locality for species
 * †Phillipsia
 * †Phillipsia nosonensis – type locality for species
 * †Pholidops
 * †Phragmorthis
 * †Phragmorthis buttsi – or unidentified comparable form
 * †Phricodothyris
 * †Phyllograptus
 * Plaesiomyiidae - Plesiomys subquadrata.JPG †[[Plaesiomys]]
 * †Plagiura
 * †Plagiura cerops – or unidentified comparable form
 * †Plagiura minor
 * †Planolites
 * †Plasmopora
 * †Plasmopora follis – or unidentified comparable form
 * †Platyceras
 * †Plectatrypa
 * †Plectorthis
 * †Plectorthis mazourkaensis
 * †Plectorthis patula
 * †Poleumita
 * †Poleumita octavia
 * †Polidevcia
 * †Polyplacus
 * †Polyplacus kilmeri
 * †Polypora
 * †Porefieldia
 * †Porefieldia robusta
 * †Presbynileus
 * †Productus
 * †Productus keokuk
 * Proetus concinnus reconstruction cropped.png †[[Proetus (trilobite)|Proetus]]
 * †Proexenocrinus
 * †Proexenocrinus inyoensis
 * †Progalerus – tentative report
 * †Prosolarium
 * †Protocalymene
 * †Protocalymene mcallisteri
 * †Protowentzelella – type locality for genus
 * †Protowentzelella cystosa
 * †Protowentzelella kunthi
 * †Protowentzelella noinskyi
 * †Protowentzelella shastensis – type locality for species
 * †Protowentzelella variabilis – type locality for species
 * †Proturritella
 * †Proturritella historicum – or unidentified related form
 * †Pseudocheirurus
 * †Pseudochusenella
 * †Pseudochusenella buttensis – type locality for species
 * †Pseudochusenella concisa
 * †Pseudochusenella hazzardi – type locality for species
 * †Pseudocystophora
 * †Pseudocystophora fryi – type locality for species
 * †Pseudocystophora wilsoni – type locality for species
 * †Pseudofusulina
 * †Pseudofusulina accepta – type locality for species
 * †Pseudofusulina acuta – type locality for species
 * †Pseudofusulina amoena – type locality for species
 * †Pseudofusulina ardua – type locality for species
 * †Pseudofusulina attenuata – type locality for species
 * †Pseudofusulina concisa – type locality for species
 * †Pseudofusulina contracta – type locality for species
 * †Pseudofusulina decora – type locality for species
 * †Pseudofusulina distorta – type locality for species
 * †Pseudofusulina elleryensis – type locality for species
 * †Pseudofusulina eximia – type locality for species
 * †Pseudofusulina extensa – type locality for species
 * †Pseudofusulina juncea – type locality for species
 * †Pseudofusulina laxa – type locality for species
 * †Pseudofusulina meeki – type locality for species
 * †Pseudofusulina minuta – type locality for species
 * †Pseudofusulina modesta – type locality for species
 * †Pseudofusulina monstrosa – type locality for species
 * †Pseudofusulina plana – type locality for species
 * †Pseudofusulina retusa – type locality for species
 * †Pseudofusulina solita – type locality for species
 * †Pseudofusulina soluta – type locality for species
 * †Pseudofusulina spissa – type locality for species
 * †Pseudofusulina tenuis – type locality for species
 * †Pseudofusulina tenuitheca – type locality for species
 * †Pseudofusulinella
 * †Pseudofusulinella aculeata – type locality for species
 * †Pseudofusulinella acuminata – type locality for species
 * †Pseudofusulinella acuta – type locality for species
 * †Pseudofusulinella alta – type locality for species
 * †Pseudofusulinella antiqua – type locality for species
 * †Pseudofusulinella bellula – type locality for species
 * †Pseudofusulinella biconica – type locality for species
 * †Pseudofusulinella decora – type locality for species
 * †Pseudofusulinella delicata – type locality for species
 * †Pseudofusulinella dunbari – type locality for species
 * †Pseudofusulinella formosa – type locality for species
 * †Pseudofusulinella fragilis – type locality for species
 * †Pseudofusulinella fusiformis – type locality for species
 * †Pseudofusulinella harbaughi – type locality for species
 * †Pseudofusulinella meeki – type locality for species
 * †Pseudofusulinella montis
 * †Pseudofusulinella moorei – type locality for species
 * †Pseudofusulinella munda – type locality for species
 * †Pseudofusulinella nitida – type locality for species
 * †Pseudofusulinella obtusa – type locality for species
 * †Pseudofusulinella occidentalis
 * †Pseudofusulinella opima – type locality for species
 * †Pseudofusulinella parvula – type locality for species
 * †Pseudofusulinella pinguis – type locality for species
 * †Pseudofusulinella prima – type locality for species
 * †Pseudofusulinella proba – type locality for species
 * †Pseudofusulinella pulchella – type locality for species
 * †Pseudofusulinella retusa – type locality for species
 * †Pseudofusulinella rotunda – type locality for species
 * †Pseudofusulinella sera – type locality for species
 * †Pseudofusulinella simplex – type locality for species
 * †Pseudofusulinella solida – type locality for species
 * †Pseudofusulinella solita – type locality for species
 * †Pseudofusulinella spicata – type locality for species
 * †Pseudofusulinella splendens – type locality for species
 * †Pseudofusulinella thompsoni – type locality for species
 * †Pseudofusulinella tumida – type locality for species
 * †Pseudofusulinella ventricosa – type locality for species
 * †Pseudofusulinella venusta – type locality for species
 * †Pseudofusulinella wheeleri – type locality for species
 * †Pseudomera
 * †Pseudomera barrandei – or unidentified comparable form
 * †Pseudoschwagerina
 * †Pseudoschwagerina arta
 * †Pseudoschwagerina californica – type locality for species
 * †Pseudoschwagerina gerontica – or unidentified comparable form
 * †Pseudoschwagerina robusta
 * †Pseudoschwagerina roeseleri
 * †Pseudoschwagerina uddeni
 * †Ptarmiganoides
 * †Ptarmiganoides hexacantha
 * †Ptarmiganoides propiqua – or unidentified comparable form
 * Pteridinium cropped.jpg †[[Pteridinium]] – tentative report
 * †Ptychocaulus
 * †Ptychocaulus rodneyi – type locality for species
 * †Ptychopleurella
 * †Ptychopleurella mediocostata – or unidentified comparable form
 * †Ptychopleurella uniplicata – or unidentified related form
 * †Ptyocephalus
 * †Ptyocephalus declevita – or unidentified comparable form
 * †Punctospirifer

R

 * †Radiotrabeculopora
 * †Radiotrabeculopora reticulata
 * †Raphispira
 * †Raphispira plena – or unidentified comparable form
 * †Raymondaspis
 * †Raymondaspis vespertina
 * †Remopleurides
 * †Remopleuridiella
 * †Repinaella
 * †Replicoskenidioides
 * †Replicoskenidioides rodneygreggi
 * †Reticulariina – tentative report
 * †Reticulariina laxa
 * †Rhabdomeson
 * †Rhipidomella
 * †Rhynchopora
 * †Rhynchopora taylori
 * †Rhysostrophia
 * †Rhysostrophia nevadensis
 * †Rhysostrophia occidentalis
 * †Rigbyetia
 * †Rigbyetia obconica
 * †Rossoceras
 * †Rotellomphalus
 * †Rotellomphalus tardus – or unidentified comparable form
 * †Ruedemannia
 * †Ruedemannia lirata – or unidentified comparable form
 * †Ruedemannoceras
 * †Rugosochonetes
 * †Rugosochonetes californicus
 * †Rugosochonetes californucus
 * RusophycusOrdovician.jpg †[[Rusophycus]]

S

 * †Salopina
 * †Salopina horseshoensis
 * †Sandolasma
 * †Sandolasma mckassoni – type locality for species
 * †Sandolasma stonei
 * †Scaphorthis
 * †Schistometopus
 * †Schizodus
 * †Schizonema
 * †Schizonema nisis – or unidentified comparable form
 * †Schizophoria
 * †Schizophoria bisinuata – or unidentified comparable form
 * †Schizophoria compacta – or unidentified comparable form
 * †Schubertella
 * †Schubertella kingi
 * †Schubertella minuta – type locality for species
 * †Schubertella pusilla – type locality for species
 * †Schuchertella
 * †Schwagerina
 * †Schwagerina aculeata
 * †Schwagerina acuminata – type locality for species
 * †Schwagerina amoena – type locality for species
 * †Schwagerina arta – type locality for species
 * †Schwagerina aspera – type locality for species
 * †Schwagerina astricta – type locality for species
 * †Schwagerina bassensis – type locality for species
 * †Schwagerina bayhaensis – type locality for species
 * †Schwagerina biconica – type locality for species
 * †Schwagerina birklundensis – type locality for species
 * †Schwagerina concinna – type locality for species
 * †Schwagerina convexa
 * †Schwagerina corpulenta – type locality for species
 * †Schwagerina curta – type locality for species
 * †Schwagerina cylindrica – type locality for species
 * †Schwagerina davisi – or unidentified comparable form
 * †Schwagerina demissa – type locality for species
 * †Schwagerina elkoensis – or unidentified comparable form
 * †Schwagerina eximia – type locality for species
 * †Schwagerina fiski – type locality for species
 * †Schwagerina harbaughi – type locality for species
 * †Schwagerina humilis – type locality for species
 * †Schwagerina juncea – type locality for species
 * †Schwagerina klamathensis – type locality for species
 * †Schwagerina laudoni – type locality for species
 * †Schwagerina longissimoidea
 * †Schwagerina mccloudensis – type locality for species
 * †Schwagerina menziesi – or unidentified comparable form
 * †Schwagerina modica
 * †Schwagerina moorei – type locality for species
 * †Schwagerina providens
 * †Schwagerina providnes
 * †Schwagerina pseudoprinceps – type locality for species
 * †Schwagerina pugunculus – or unidentified comparable form
 * †Schwagerina pulchella – type locality for species
 * †Schwagerina remissa – type locality for species
 * †Schwagerina rotunda – type locality for species
 * †Schwagerina schencki – type locality for species
 * †Schwagerina soluta – type locality for species
 * †Schwagerina spicata – type locality for species
 * †Schwagerina turgida – type locality for species
 * †Schwagerina ventricosa – type locality for species
 * †Schwagerina vervillei
 * †Schwagerina wellsensis – or unidentified comparable form
 * †Schwagerina wheeleri – type locality for species
 * †Scolithes
 * †Semicostella
 * †Septospirifer – tentative report
 * †Setigerites
 * †Shamovella
 * †Shastalasma
 * †Shastalasma coogani – type locality for species
 * †Shastalasma gavini – type locality for species
 * †Shastalasma woodi – type locality for species
 * †Shastaphyllum – type locality for genus
 * †Shastaphyllum schucherti – type locality for species
 * †Sigmelasma – type locality for genus
 * †Sigmelasma pantherae – type locality for species
 * †Siskiyouspira – type locality for genus
 * †Siskiyouspira vostokovae – type locality for species
 * †Skenidioides
 * †Skenidioides glindmeyeri – type locality for species
 * †Skenidioides mulifarius
 * †Skenidioides multifarius
 * †Skinnerella
 * †Skinnerella davydovi – type locality for species
 * †Skinnerella hexagona – type locality for species
 * †Skinnerella mcallisteri – type locality for species
 * †Spinuliplica
 * †Spinulothele
 * Spirifer perlamosus pedunculate valve.jpg †[[Spirifer]]
 * †Spirifer brazerianus
 * †Spiriferella
 * †Spiriferellina
 * †Spiriferina – tentative report
 * †Squamularia – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Stacheoceras
 * †Stacheoceras antiquum – or unidentified related form
 * †Stacheoceras gordoni – type locality for species
 * †Stearoceras
 * †Stearoceras phosphoriense – or unidentified related form
 * †Stenoloron – tentative report
 * †Stenoloron fasciata – or unidentified related form
 * †Stenoscisma
 * †Stenoscisma venustum
 * †Stereostylus
 * †Stereostylus bollibokkensis – type locality for species
 * †Stewartina
 * †Stewartina convexa
 * †Stewartina magnifica – type locality for species
 * †Stewartina multispira
 * †Stewartina texana
 * †Stewartina uber
 * †Stewartina ultimata – type locality for species
 * †Straparollus
 * †Streblochondria
 * †Streblopteria
 * †Streptelasma
 * †Streptosolen
 * †Striatifera
 * †Striatopora – tentative report
 * †Striatopora gwenensis – or unidentified comparable form
 * †Stricklandia – tentative report
 * †Strigigenalis
 * †Stylonema
 * †Stylonema potens – or unidentified comparable form
 * †Swantonia
 * Swartpuntiagermsi.png †[[Swartpuntia]] – or unidentified comparable form
 * †Symphysurina
 * †Syringaxon
 * †Syringopora
 * †Syspacephalus
 * †Syspacephalus granulosus – tentative report
 * †Syspacephalus obscurus
 * †Syspacephalus variosus – type locality for species

T

 * †Taphrhelminthopsis
 * †Taphrhelminthopsis nelsoni
 * †Taphrorthis – tentative report
 * †Temnodiscus – tentative report
 * †Temnodiscus euryomphalus
 * †Thairoplax
 * †Thairoplax merriami – type locality for species
 * †Thamniscus – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Thamnosia
 * †Thamnosia arctica
 * †Thompsonella
 * †Thompsonella cylindrica – type locality for species
 * †Thompsonella rugosa – type locality for species
 * †Timaniella
 * †Timaniella pseudocamerata
 * †Tonopahella – type locality for genus
 * †Tonopahella goldfieldensis – type locality for species
 * †Tonopahella walcotti
 * †Torynifer
 * †Trematospira
 * †Trepospira
 * Arthrorhachis tarda draw entite.png †[[Trinodus]]
 * †Trinodus clusus – or unidentified comparable form
 * †Triticites
 * †Triticites bensonensis
 * †Triticites brevis – type locality for species
 * †Triticites burgessae – or unidentified comparable form
 * †Triticites buttensis
 * †Triticites californicus
 * †Triticites cellamagnus
 * †Triticites elegantoides
 * †Triticites gigantocellus
 * †Triticites hermanni – type locality for species
 * †Triticites invenustus – type locality for species
 * †Triticites muddiensis
 * †Triticites mulleri – type locality for species
 * †Triticites occidentalis – type locality for species
 * †Triticites schencki – type locality for species
 * †Triticites tumentis – type locality for species
 * †Triticites usitatus – type locality for species
 * †Triticites ventricosus – or unidentified related form
 * †Triticites viribus – type locality for species
 * †Trocholites – tentative report
 * †Trochonema
 * †Trochonema liljevalli – type locality for species
 * †Trochonemella – tentative report
 * †Trochonemella mikulici – type locality for species
 * †Tschussovskenia
 * †Tschussovskenia connorsensis

U

 * †Unispirifer

V

 * †Valcourea
 * †Valcourea plana – or unidentified comparable form
 * †Verneuilia
 * †Volborthella
 * †Volborthella tenuis
 * †Volocephalina
 * †Volocephalina connexa
 * †Volocephalina contracta

W

 * †Waagenoconcha – tentative report
 * †Waagenophyllum
 * †Waagenophyllum klamathensis – type locality for species
 * Wanneria walcottana negative CRF.jpg †[[Wanneria]]
 * †Waucobella
 * †Waucobella nelsoni
 * †Wellerella
 * †Wellerella hemiplicata – or unidentified comparable form
 * †Wellerella rotunda – or unidentified comparable form
 * †Wenkchemnia
 * †Wenkchemnia spinicollus – tentative report
 * †Wenkchemnia sulcata
 * †Westgardia
 * †Westgardia gigantea – type locality for species
 * †Wexolina – type locality for genus
 * †Wexolina tombstonensis – type locality for species
 * †Whitfieldella – tentative report
 * †Wilsonastraea – type locality for genus
 * †Wilsonastraea fluvius – type locality for species
 * †Wilsonastraea parva – type locality for species
 * †Wilsonastraea smithi – type locality for species
 * †Wintunastraea – type locality for genus
 * †Wintunastraea stanleyi – type locality for species
 * †Wyattia

X

 * Xenodiscus besairiei.JPG †[[Xenodiscus]]
 * †Xenodiscus carbonarius – or unidentified related form
 * †Xenostegium
 * †Xestotrema
 * †Xestotrema pulchrum

Y

 * †Yakovlevia
 * †Yakovlevia californica – type locality for species

Z

 * †Zacanthoides
 * †Zacanthopsis
 * †Zelophyllum