This list of the Mesozoic 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 252.17 and 66 million years of age.
A
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Diagram depicting the soft part anatomy of the sea snail Abyssochrysos - †Abyssochrysos giganteum – type locality for species
- †Acaeniotyle
- †Acaeniotyle umbilicata – or unidentified related form
- †Acanthoceras
- †Acanthoceras rhotomagense – or unidentified related form
- †Acanthoceras roguense – or unidentified related form
- †Acanthoceras sherborni – or unidentified comparable form
- †Acanthocircus
- Acanthosphaera – tentative report
- †Acastea
- Acesta
- Acharax
- Acila
- †Acrioceras
Fossilized teeth of the Permian-Paleocene cartilaginous fish Acrodus - †Acrodus wempliae – type locality for species
- †Acteon
- †Acteonella
- †Acteonina
- †Acteonina berryessensis – type locality for species
- †Acteonina californica
- †Acteonina columnaris
- †Acusten
- †Adelodonax
- †Aechmella
- †Agnomyax
- †Aguileria – or unidentified comparable form
- †Alarimella
- †Alarimella anae – type locality for species
- †Alarimella veta
Life restoration of the Late Cretaceous armored dinosaur Aletopelta - †Aletopelta coombsi – type locality for species
- †Alievium
- Amauropsis
- †Ambercyclus
- †Amphidonte
Fossilized shell of the Jurassic-Miocene sea snail Ampullina - Amuletum
- †Anagaudryceras
- †Anagaudryceras mikobokense
- †Anagaudryceras sacya – or unidentified comparable form
- †Anahamulina
- †Anarhynchia
- †Anarhynchia gabbi – or unidentified comparable form
- †Anasibirites
- †Anasibirites desertorum
- †Anasibirites kingianus – type locality for species
- †Anasibirites lindgreni
- †Anatomites
- †Anatomites adalberti
- †Anatomites damesi
- †Anatomites edgari
- †Anatomites externiplicatus
- †Anatomites intermittens
- †Anatomites konnincki
- †Anatomites mendenhalli
- †Anatomites obsoletus – type locality for species
- †Anatomites shastensis – type locality for species
- †Anatomites subintermittens – type locality for species
- †Anatropites
- †Anchura
- †Anchura ainikta – type locality for species
- †Anchura baptos – type locality for species
- †Anchura californica
- †Anchura callosa
- †Anchura condoniana
- †Anchura falciformis
- †Anchura gibbera
- †Anchura halberdopsis – type locality for species
- †Anchura phaba – type locality for species
- †Anglonautilus
- †Angulobracchia
- †Anisoceras
- †Anisomyon
- †Anomalina
Interior and exterior of a shell of an Anomia, or jingle shell - †Anomia – type locality for species A – informal
- †Anomia jalama
- †Anomia lineata
- †Anoplophora – tentative report
- †Anoplophora shastensis – type locality for species
- †Anthonya
- †Aphaea
- †Aphanoptyxis
- †Aphanoptyxis andersoni
- †Aphanoptyxis californica – type locality for species
- †Aphrodina
- †Aphrosaurus
Multiple views of a shell of an Aporrhais pelican foot sea snail - †Aporrhais veta – type locality for species
- †Archaeocenosphaera
- †Archaeocenosphaera ruesti – or unidentified related form
- †Archaeodictyomitra
- †Archaeohagiastrum
- †Archaeohagiastrum minutum – or unidentified related form
- Archaeolithothamnium
- †Archaeopus
- †Archaeospongoprunum
- †Archaeospongoprunum carrierensis
- †Archaeospongoprunum cortinaensis
- †Archaeospongoprunum elegans – or unidentified related form
- †Archaeospongoprunum imlayi
- †Archaeospongoprunum klingi
- †Archaeospongoprunum macrostylum – or unidentified related form
- †Archaeospongoprunum praeimlayi
- †Archaeospongoprunum praelongum
- †Archaeospongoprunum tehamaensis
A living Architectonica staircase shell sea snail - Arcopagia
- Arctica
- †Arctica anthracocola
- †Arctica denmanensis – or unidentified related form
- †Arctoceras
- †Areaseris
- Argyrotheca
- †Argyrotheca retrorsa – type locality for species
Fossilized shell of the Early Jurassic ammonoid cephalopod Arnioceras - †Arpadites
- †Arpadites kingi – type locality for species
- Arrhoges
- †Aspenites – type locality for genus
- Astarte
- †Astarte sulcata – tentative report
- †Astarte sulcuta
- †Astarte tuscana
- †Asteroceras
- †Astrocoenia – report made of unidentified related form or using admittedly obsolete nomenclature
- Ataphrus
- †Ataphrus compactus – tentative report
- †Atira
- †Atractites
- †Atractites philippii – type locality for species
- †Atresius
- †Aucellina – tentative report
Fossilized partial skull of the Late Cretaceous duck-billed dinosaur Augustynolophus - Avicula
- †Avicula mucronata – type locality for species
- †Avicula soperi – type locality for species
- †Axonoceras
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B
edit- †Bacchites
- †Bacchites hyatti – type locality for species
- †Bacchites pinguis
Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites - †Baculites anceps
- †Baculites bailyi – or unidentified comparable form
- †Baculites buttensis – type locality for species
- †Baculites capensis
- †Baculites chicoensis
- †Baculites fairbanksi
- †Baculites inornatus
- †Baculites lomaensis
- †Baculites occidentalis
- †Baculites recta – or unidentified comparable form
- †Baculites rex – type locality for species
- †Baculites schencki – type locality for species
- †Baculites yokoyamai – or unidentified comparable form
- †Bagotum
- †Balantiostoma – tentative report
- Barbatia
- †Barrettia
Mounted fossilized skeleton of the Cretaceous turtle Basilemys - †Bathypurpurinopsis
- †Bathypurpurinopsis stantoni – type locality for species
- † Belleza
- †Belliscala
- Bernaya
- †Bernaya argonautica – type locality for species
- †Bernaya berryessae – type locality for species
- †Bernaya crawfordcatei – type locality for species
- †Bernaya gualalaensis – type locality for species
- †Bernaya jeanae – type locality for species
- †Bernaya kayei – or unidentified related form
- †Bernaya louellasaulae – type locality for species
- †Bernaya popenoei – type locality for species
- †Bernaya rineyi – type locality for species
- †Bernoullius
- †Beudanticeras
- †Beudanticeras alamoense – type locality for species
- †Beudanticeras argonauticum – type locality for species
- †Beudanticeras breweri
- †Beudanticeras brewerii – or unidentified related form
- †Beudanticeras haydeni
- †Bipedis – tentative report
- †Biplica
- †Biplica heteroplicata
- †Biplica isoplicata
- †Biplica michaeli – or unidentified related form
- †Biplica miniplicata
- †Biplica multiplicata
- †Biplica obliqua
- †Bistarkum
- †Bittiscala
- †Bivallupus
- †Bochianites
- †Bolena
- †Bositra
Fossilized shell of the Late Cretaceous ammonoid cephalopod Bostrychoceras - †Bostrychoceras brewerii
- †Bostrychoceras californicum – type locality for species
- †Bostrychoceras declive
- †Bostrychoceras occidentale – type locality for species
- †Bostrychoceras otsukai – or unidentified related form
- †Brancoceras
- †Brasilichnium
- †Buchia
- †Buchia concentrica – or unidentified comparable form
- †Buchia elderensis
- †Buchia keyserlingi
- †Buchia pacifica
- †Buchia piochii
- †Buchia terebratuloides
- †Buchia trigonoides
- †Bulbificopsis – type locality for genus
- †Bulbificopsis garza – type locality for species
- Bulimina
A living Bulimulus land snail - †Bullamirifica
- Bullaria
- Bullina
- †Bullina yoloensis – type locality for species
- †Butticeras
- †Butticeras studleyi – type locality for species
C
edit- †Califadesma
- †Californigonia – type locality for genus[1]
- †Californigonia plumasensis – type locality for species. Formerly classified as Trigonia plumasensis.[1]
- †Californites – type locality for genus
- †Californites careyi – type locality for species
- †Californites merriami – type locality for species
Restoration of the Late Triassic ichthyosaur Californosaurus - Callianassa – tentative report
- †Calliconites
- †Calliconites drakei – type locality for species
- †Calliomphalus – tentative report
- Callista – tentative report
- †Callista pseudoplana – or unidentified related form
- †Callista subtrigona
- †Callistalox
- †Calva
Fossilized shell of the Late Cretaceous ammonoid cephalopod Calycoceras - †Camptonectes
- †Camptonectes curvatus – or unidentified comparable form
- †Canadoceras
- †Canadoceras celeste – type locality for species
- †Canadoceras fraternum
- †Canadoceras mysticum
- †Canadoceras newberryanum
- †Canadoceras subtilobatum – or unidentified related form
- Cancellaria – tentative report
- †Canelonus
- †Caneta
- †Canoptum
- Cantharus
- †Canutus
Shells of modern Capulus cap sea snails - †Capulus silverthorni – type locality for species
- Cardinia
- †Cardinia gleimi – type locality for species
- †Cardiomorpha – tentative report
- †Cardiomorpha digglesi – type locality for species
- Cardita
- †Cardita jenkinsi – type locality for species
- †Cassideus
- †Cecrops
- †Celtites
- Cenodiscus
- Cenosphaera
- †Ceriostella
- Cerithidea
Two views of a Cerithium cerith sea snail - †Cerithium alternata
- †Cerithium totiumsanctorum – or unidentified comparable form
- †Choristoceras
- †Choristoceras klamathense – type locality for species
- †Choristoceras marshi
- †Christitys – type locality for genus
- †Christitys delta – type locality for species
- †Christitys martini – or unidentified comparable form
- †Christitys medica – type locality for species
- †Cidarina
- †Cidarina beta – type locality for species
- †Cidarina cretacea – type locality for species
Shell and spines of a Cidaris sea urchin - †Cladoceramus
- †Clinura
- †Clisocolus
Fossilized shell of the Late Cretaceous ammonoid Collignoniceras - †Collonia
- †Collonia occidentalis – type locality for species
- †Cophocara
- †Coralliochama
- Corbicula
- Corbula
- †Corbula cancellifera
- †Corbula parilis
- †Corbula pozo
- †Corbula torta – or unidentified comparable form
- †Corbula traski
- †Corbula traskii
- Cornutella
- †Cosmonautilus
- †Cosmonautilus dilleri
- †Cosmonautilus hersheyi – type locality for species
- †Cosmonautilus pacificus – type locality for species
- †Cosmonautilus shastensis – type locality for species
- †Costispiriferina
- †Courtilloticeras
- †Courtilloticeras stevensi – type locality for species
- Crassatella
- †Crassatella conradiana
- †Crassatella mercedensis – tentative report
- †Crassatella saulae
- †Crassatella triangulata
- †Crassatella triangulatus
- †Crassatellina
Fossilized shell of the Early Cretaceous ammonoid cephalopod Crioceratites - †Crioceratites latus
- †Crioceratites tehamaensis – or unidentified comparable form
- †Crolanium
- †Crucella
- Cucullaea
- †Cucullaea alamoensis – type locality for species
- †Cucullaea bowersiana
- †Cucullaea gravida
- †Cucullaea truncata
- †Cucullaea youngi
- †Cunningtoniceras
- †Cunningtoniceras meridionale – or unidentified related form
- †Cyclothyris
- Cylichna
- †Cylindroteuthis
Fossilized shell of the Late Jurassic-Oligocene nautiloid cephalopod Cymatoceras - †Cymatoceras carlottense
- †Cymatoceras hermosus – type locality for species
- †Cymbophora
- †Cymbophora asburnerii
- †Cymbophora ashburnensis – or unidentified related form
- †Cymbophora ashburnerii
- †Cymbophora bella – or unidentified comparable form
- †Cymbophora gabbiana
- †Cymbophora popenoei
- †Cymbophora stantoni
- †Cymbophora tenuissima
- †Cymbophora triangula
- †Cymbophora triangulata
Life restoration of the Middle-Late Triassic ichthyosaur Cymbospondylus - †Cymulopora – tentative report
- †Cyprimeria
- Cyrtocapsa – tentative report
- †Cyrtocapsa kisoensis – or unidentified related form
_spinosa.JPG)
D
edit- †Damesites
- †Damesites damesi
- †Damesites frazierense
- †Damesites gardeni – or unidentified related form
- †Damesites hetonaiensis
- †Damesites richardsoni – type locality for species
- †Damesites subsugatum
Fossilized shell of the Middle-Late Triassic marine bivalve Daonella - †Darvelus
- †Darvelus pessagnoi – type locality for species
- †Darvelus primus – type locality for species
- Dentalina
- †Dentalium
Fossilized shells of the Early Cretaceous ammonoid cephalopod Desmoceras - †Desmoceras alamoense – or unidentified comparable form
- †Desmoceras argonauticum – or unidentified comparable form
- †Desmoceras dawsoni
- †Desmoceras inane
- †Desmoceras japonicum
- †Desmoceras voyi
- †Desmophyllites
- †Desmophyllites diphylloides – type locality for species
- †Deviatus
- †Diacanthocapsa
- †Dicerosaturnalis
- †Dicroa
- †Dicroloma
- †Dictyoconites
- †Dictyoconites americanus – type locality for species
- †Dictyomitra
- †Dictyomitrella
Restoration of several species of the Late Cretaceous ammonoid cephalopod Didymoceras - †Didymoceras hornbyense – or unidentified comparable form
- †Didymoceras vancouverense – or unidentified comparable form
- †Didymoceras vancouverensis
- †Dieneria – type locality for genus
- †Dieneria arthaberi – type locality for species
- †Dieneroceras
- †Dieneroceras dieneri – type locality for species
- †Dieneroceras marcoui – type locality for species
- †Dieneroceras spathi
- †Dieneroceras subquadratum
- †Dillerites – type locality for genus
- †Dillerites shastensis – type locality for species
- †Dimyodon
- †Dimyodon storrsi – type locality for species
- †Diozoptyxis
- †Diozoptyxis ursana – type locality for species
- Diplodonta
- †Diplomoceras
- †Diplomoceras ellipticum
- †Diplomoceras jimboi – type locality for species
- †Diplomoceras mustangense – type locality for species
- †Discohelix – tentative report
- †Discophyllites
- †Discoproptychites
- †Discoproptychites walcotti – type locality for species
Fossilized shell of the Late Cretaceous ammonoid cephalopod Discoscaphites - †Discotropites
- †Discotropites davisi – type locality for species
- †Discotropites formosus – type locality for species
- †Discotropites laurae
- †Discotropites lineatus
- †Discotropites mojsvarensis
- †Discotropites plinii
- †Discotropites sandlingensis
- †Discotropites sengeli
- †Discotropites smithi
- †Discotropites theron
- †Distichophyllia
Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Douvilleiceras - †Douvilleiceras mammillatum – or unidentified comparable form
- †Drepanochilus
- †Drilluta – tentative report
- †Droltus
- †Dumitricaella – tentative report
- †Dumitricaella cucurbitina – or unidentified related form
- †Durania
- †Durania californica – type locality for species
E
edit- †Echinocorys
- †Echinocorys yoloensis – type locality for species
- †Elimia
- †Ellipsoscapha
- †Ellipsoscapha nortonensis – or unidentified comparable form
- †Ellipsoscapha skaios
- †Emiluvia
Restoration of the Early Cretaceous-Eocene bony fish Enchodus, or the "saber-toothed herring" - †Endoptygma
- †Endoptygma hermax – type locality for species
- †Entobia
- †Entolium
- †Entolium equabile
- †Entolium meeki
- †Entolium pittensis – type locality for species
- †Eocomoseris
- †Eocypraea
- †Eocypraea louellae – type locality for species
- †Eodanubites
- †Eodanubites judae – type locality for species
- †Eogaudryceras
- †Eogunnarites
- †Eospongosaturninus
- †Eripachla
- †Eripachya
- †Eriphyla
- †Etea
- †Eucalycoceras
- †Eucalycoceras diabloense – type locality for species
Illustration of the fossilized skull of the sea turtle Euclastes - †Eucymatoceras
- †Eucyrtidiellum
- †Eucyrtidium – tentative report
- †Euidothyris
- †Euidothyris lucerna – type locality for species
- †Euomphaloceras
- †Eupachydiscus
- †Eupachydiscus arbucklensis – type locality for species
- †Eupachydiscus haradai
- †Eupachydiscus lamberti – or unidentified related form
- †Eupachydiscus willgreeni – type locality for species
- †Euspira
- †Eutrephoceras
Fossilized shell of the Late Cretaceous ammonoid cephalopod Exiteloceras - †Exiteloceras bennisoni – type locality for species
- †Exiteloceras desertense – type locality for species
- †Exiteloceras diabloense – tentative report
- †Exiteloceras ortigalitoense – type locality for species
- †Exiteloceras vancouverense
- †Exogyra
F
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Fossilized shell of the Late Cretaceous ammonoid cephalopod Fagesia - †Fagesia catinus – type locality for species
- †Fagesia klamathensis – type locality for species
- Fissurella – tentative report
- †Flabellina
- †Flabellirhynchia
- †Flabellirhynchia concinna – type locality for species
- †Flabellirhynchia falconis – type locality for species
- †Flabellum
- †Flabellum fresnoense – type locality for species
- †Flaventia
- †Foremanina
- †Francisciconcha
- †Fresnosaurus – type locality for genus
- †Fresnosaurus drescheri – type locality for species
- Frondicularia
- †Frondicularia undulosa – or unidentified comparable form
G
edit- †Gabbioceras
- †Garzasia
- †Garzasia diabla
- †Garzasia intermedia – or unidentified comparable form
- Gastrochaena – tentative report
Fossilized shell of the Cretaceous ammonoid cephalopod Gaudryceras - †Gaudryceras alamedense
- †Gaudryceras aureum – type locality for species
- †Gaudryceras cinctum – or unidentified related form
- †Gaudryceras debnabebse – or unidentified comparable form
- †Gaudryceras denmanense – or unidentified comparable form
- †Gaudryceras kayei – type locality for species
- †Gaudryceras tenuiliratum – tentative report
- †Gaudryceras texanum – type locality for species
- †Gervillia
- Glans – tentative report
- †Glauconia
- †Globigerinelloides
- †Globirhynchia
- †Globirhynchia gnathophora – type locality for species
- †Globirhynchia oblatopinguis – type locality for species
- †Globirhynchia rhacta – type locality for species
- †Globirhynchia schucherti – type locality for species
- Glossus
Fossilized shell of a Glycymeris, or bittersweet clam - †Glycymeris anae
- †Glycymeris apletos
- †Glycymeris banosensis – type locality for species
- †Glycymeris pacifica – or unidentified comparable form
- †Glycymeris pacificus
- †Glycymeris shastensis – type locality for species
- †Glycymeris suciensis
- †Glycymeris veatchii
- †Glycymeris yoloensis
- †Glyptoxoceras
- †Glyptoxoceras largesulcatum – or unidentified comparable form
- †Glyptoxoceras subcompressum – or unidentified comparable form
- †Gnathorhynchia
- †Gnathorhynchia perplicata – type locality for species
- †Gnomohalorites
- Gongylothorax
- †Gongylothorax oblongus – or unidentified related form
- †Goniojuvavites
- †Goniojuvavites kellyi – type locality for species
- †Gonionotites
- †Gonionotites northi – type locality for species
- †Gorgansium
- †Goricanites – type locality for genus
- †Goricanites noblei – type locality for species
Fossil negative with skin impressions of the theropod dinosaur footprint ichnogenus Grallator - †Grammatodon
- †Gryphaea
- †Gryponautilus
- †Gryponautilus cooperi – type locality for species
- †Guexella
- †Guineana
- †Guodunites
- †Guodunites hooveri – type locality for species
- †Gymnotropites
- †Gymnotropites americanus – type locality for species
- †Gymnotropites laevis – type locality for species
- †Gymnotropites rotundus – type locality for species
- Gyrodes
- †Gyrodes allisoni
- †Gyrodes californicus
- †Gyrodes canadensis
- †Gyrodes conradiana
- †Gyrodes dowelli
- †Gyrodes expansa
- †Gyrodes expansus
- †Gyrodes greeni – type locality for species
- †Gyrodes pacificum
- †Gyrodes pacificus – or unidentified comparable form
- †Gyrodes quercus
- Gyroidina
H
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A living Haliotis, or abalone - †Halobia
- †Hauericeras
- †Hauericeras angustum
- †Hauericeras churchi – type locality for species
- †Hauericeras mickeyi – type locality for species
- †Hauerites
- †Hauerites lawsoni – type locality for species
- †Haydenia
- †Hecticoceras
Fossilized shell of the Triassic ammonoid cephalopod Hedenstroemia - †Helena
- †Helicaulax
- †Helicaulax popenoei – type locality for species
- Hemiaster
- †Hemicidaris
- †Hemicryptocapsa
- †Hemicryptocapsa ruesti – or unidentified related form
Modern individual of the Cretaceous-modern cow shark genus Heptranchias - †Hertleinites
- †Heteroderma
- †Hexasaturnalis
- †Hexasphaera
- †Higumastra
- †Higumastra boucoti
- †Higumastra devilsgapensis
- †Higumastra dumitricai
- †Higumastra imbricata
- †Higumastra inflata – or unidentified related form
- †Higumastra transversa
- †Hilarisirex
Shell of a Hipponix, or hoof sea snail - †Hiscocapsa
- †Hiscocapsa acuta
- †Hiscocapsa japonica – or unidentified comparable form
- †Hiscocapsa robusta
- †Hokkaidoconcha
- †Hokkaidoconcha bilirata – type locality for species
- †Hokkaidoconcha morenoensis – type locality for species
- †Hokkaidoconcha occidentalis
- †Hokkaidoconcha tehamaensis – type locality for species
- †Holcodiscoides
- †Holcodiscoides gorrilli – type locality for species
- †Holcophylloceras – tentative report
- †Hollisites
- †Holocryptocanium
- †Homerites
- †Homoeoparonaella
- †Homolsomites
- †Hoplocrioceras
- †Hoplotropites
- †Hormathospongia – type locality for genus
- †Hormathospongia dictyota – type locality for species
- †Hsuum
Restoration of two of the Permian-Late Cretaceous cartilaginous fish Hybodus - †Hybodus shastensis – type locality for species
- †Hydrotherosaurus – type locality for genus
- †Hydrotherosaurus alexandrae – type locality for species
- †Hyphantoceras
- †Hyphantoceras ceratopse
- †Hyphantoceras venustum – or unidentified comparable form
- †Hypophylloceras
- †Hypophylloceras onoense – or unidentified related form
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_(San_Salvador_Island,_Bahamas)_2_(16003468958).jpg)
I
edit- †Icantia
Restoration of the Late Cretaceous toothed bird Ichthyornis - †Ichthyosaurus
- †Ichthyosaurus californicus – type locality for species
- †Ichthyosaurus franciscanus – type locality for species
- †Igonoia
- †Indonesites
Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size - †Inoceramus aduncas
- †Inoceramus aduncus
- †Inoceramus amakusensis – or unidentified comparable form
- †Inoceramus angulatus – or unidentified comparable form
- †Inoceramus balticus
- †Inoceramus chicoensis – type locality for species
- †Inoceramus cordiformis – or unidentified comparable form
- †Inoceramus cymbaeformis – or unidentified related form
- †Inoceramus digitatus – or unidentified related form
- †Inoceramus ezoensis – or unidentified comparable form
- †Inoceramus glennensis
- †Inoceramus goldfussi – or unidentified comparable form
- †Inoceramus gradilis
- †Inoceramus incertus – or unidentified comparable form
- †Inoceramus jacksonensis – type locality for species
- †Inoceramus japonicus – or unidentified comparable form
- †Inoceramus klamathensis
- †Inoceramus naumanni
- †Inoceramus pembertoni – or unidentified related form
- †Inoceramus regularis – or unidentified related form
- †Inoceramus shikotanensis – or unidentified comparable form
- †Inoceramus stanislausensis
- †Inoceramus steinmanni – or unidentified comparable form
- †Inoceramus subundantus
- †Inoceramus subundatus
- †Inoceramus teshioensis – or unidentified comparable form
- †Inoceramus turgidus – type locality for species
- †Inoceramus vancouverensis
- †Inoceramus whitneyi – or unidentified related form
- †Inoperna
- †Inyoceras
- †Inyoceras bittneri – type locality for species
- †Inyoceras multicameratus – type locality for species
- †Inyoites – type locality for genus
- †Inyoites oweni – type locality for species
- Isocrinus
Fossilized shell of the Permian-modern marine bivalve Isognomon - †Isognomon – type locality for species – informal
J
edit- †Jeanbesseiceras – tentative report
- †Joaquinites – type locality for genus
- †Joaquinites fascicostatum – type locality for species
- †Jovites
- †Jovites pacificus – type locality for species
- Jupiteria
- †Juvavites
- †Juvenites
- †Juvenites dieneri – type locality for species
K
edit
Fossilized shells of the Jurassic brachiopod Kallirhynchia - †Kallirhynchia phylarchus – type locality for species
- †Kallirhynchia valliculae – type locality for species
- †Katroma
- †Katroma neagui – or unidentified related form
- †Keyserlingites
- †Keyserlingites pacificus – type locality for species
- †Keyserlingites subrobustus
- †Kilianella
- †Kilinora
- †Klamathites
- †Klamathites kellyi
- †Klamathites schucherti – type locality for species
Fossilized shell of the Early Cretaceous ammonoid cephalopod Kossmaticeras - †Kossmaticeras japonicum – or unidentified related form
- †Kozurium
- †Kuhnastraea
L
edit- †Laballa
- †Laballa suessi – or unidentified comparable form
- †Lacunaria
- †Lampasa
- †Lanceolites – type locality for genus
- †Lanubus
- Laternula – tentative report
- †Latidorsella
- †Latidorsella barryae – type locality for species
- †Latimaeandra – report made of unidentified related form or using admittedly obsolete nomenclature
- †Leconteia – type locality for genus
- †Leconteia californica – type locality for species
- †Leconteiceras
- †Leconteiceras occidentale – type locality for species
- †Leconteites
- †Leconteites lecontei – tentative report
- Leda – tentative report
- †Leda translucidus – tentative report
- †Legumen
- †Leptosolen
- †Leugeo
- †Levileugeo
- Lima
- †Lima – type locality for species A – informal
- †Lima beta
- †Lima costata
- †Lima kimballi – type locality for species
- †Lima terqueni
- Limopsis
- †Linaresia
- †Linearis
- †Linearis multicostata – or unidentified comparable form
- †Lingula
- †Lipmanium – tentative report
- †Lisopithia
- †Lispodesthes
- †Lithiotis
- †Lithomphalus
- Lithophaga
- †Loboidothyris
- †Loboidothyris meeki – type locality for species
- †Loboidothyris mormonensis – type locality for species
- †Longoconcha – tentative report
Fossilized shell of the Triassic-modern marine bivalve Lopha - Loripes – tentative report
- †Loxo
- †Lucina
- †Lyriochlamys
- †Lysis
- †Lysis californica
- †Lysis duplicosta
- †Lysis suciensis – or unidentified comparable form
Fossilized shell of the Early Jurassic-Late Cretaceous ammonoid cephalopod Lytoceras - †Lytoceras aulaeum
- †Lytoceras batesi
- †Lytoceras saturnale
- †Lytoceras traski – or unidentified comparable form
- †Lytoceras whitneyi
M
edit- Macrocallista
- †Macrocallista cordata – or unidentified related form
Fossilized shell of the Middle Jurassic ammonoid cephalopod Macrocephalites - †Madrasites
- †Madrasites voyanum – type locality for species
- †Mammites – tentative report
- †Mantelliceras
- †Mantelliceras lecontei – or unidentified comparable form
- Margarella
- †Margariella – tentative report
- †Margaritella
- Margarites
- †Margarites inornatus
- †Margarites ornatissima
- †Margarites senilis
- †Margarites septentrionalis – type locality for species
- †Margaritropites
- †Margaritropites johnsoni – type locality for species
- †Margaritropites kokeni – type locality for species
- †Marginotruncana
- Marginulina
Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Mariella - Martesia
- †Mataxa
- †Mataxa arida – type locality for species
- †Mediaster
- †Mediaster hayi – type locality for species
- †Meekia
- †Meekia bella
- †Meekia daileyi
- †Meekia iberica
- †Meekia lirata – tentative report
- †Meekia louella
- †Meekia mygale
- †Meekia radiata
- †Meekia sella
- †Meekia takeoana – tentative report
- †Meekoceras
- †Melchiorites
Assemblage of fossilized shells of the Late Cretaceous ammonoid cephalopod Menuites - †Menuites arrialoorensis – or unidentified related form
- †Menuites siskiyouensis
- †Merriamia
- †Mesopuzosia
- †Mesopuzosia colusaense
- †Mesopuzosia intermedia – or unidentified comparable form
- †Mesopuzosia pacifica – or unidentified comparable form
- †Metacerithium – tentative report
- †Metaplacenticeras
- †Metasibirites
- †Metasibirites brockensis – type locality for species
- †Metasibirites coei – type locality for species
- †Metasibirites frechi – type locality for species
- †Metasibirites gracilis – type locality for species
- †Metasibirites modestus – type locality for species
- †Metasibirites mojsvarensis – type locality for species
- †Metasibirites pusillus – type locality for species
- †Metasibirites pygmaeus – type locality for species
- †Metasibirites shastensis – type locality for species
- †Metatirolites
- †Microsciadiocapsa
- †Microtropites
- †Millerocaulis
- †Millerocaulis embreei – type locality for species
- †Minasteria – report made of unidentified related form or using admittedly obsolete nomenclature
- †Minocapsa
- †Minytropis
- †Mirifusus
- †Mirifusus baileyi
- †Mirifusus chenodes – or unidentified related form
- †Mirifusus fragilis
- †Mirifusus guadalupensis
- †Mirifusus mediodilatatus
- † Mita – tentative report
- † Mita
- †Modiolus
- †Mojsvaroceras
- †Mojsvaroceras turneri – type locality for species
- †Monotis
- †Morenosaurus – type locality for genus
- †Morenosaurus stocki – type locality for species
Fossilized shell of the Early Cretaceous ammonoid cephalopod Mortoniceras - †Msopuzosia
- †Msopuzosia densicostata – or unidentified comparable form
- †Murphitys – type locality for genus
- †Murphitys corona – type locality for species
- †Murphitys madonna – type locality for species
- †Murphitys michaeli – type locality for species
- Musculus – or unidentified related form
- †Myoconcha
Fossilized shell of the Jurassic-Cretaceous marine bivalve Myophorella - †Myophorella argo
- †Myophorella dawsoni – or unidentified related form
- †Myophorella yellowstonensis
- †Myophoria
- †Myophoria brockensis – type locality for species
- Myrtea
- †Myrtea gabbi – tentative report
- †Mytiloides
- †Mytiloides labiatus
- †Mytiloides mytiloides
- †Mytiloides opalensis
- †Mytiloides stantoni – or unidentified comparable form
Shells washed ashore of Mytilus mussels - †Mytilus pauperculus – or unidentified comparable form
- †Mytilus quadratus
- †Mytilus ursensis – type locality for species
N
edit- †Nanonavis
- Napora
- †Napora bearensis – or unidentified comparable form
- †Napora bukryi
- †Napora collieri
- †Napora dumitricai
- †Napora durhami
- †Napora elkcampensis
- †Napora espinosa
- †Napora latissima – or unidentified related form
- †Napora lomoalta
- †Napora nipponica
- †Napora pacifica
- †Napora praespinifera
- †Napora pyramidalis
- †Napora redonda
- †Napora saginata – or unidentified related form
- †Napora sixi
- †Napora spinifera
- Natica
- †Navahopus
Life restoration of the Late Triassic thalattosaurs Nectosaurus (right) and Thalattosaurus - †Neithea
- †Nelltia
- †Nelltia roddana – tentative report
- †Nelltia salsa – type locality for species
- †Nemodon
- †Neocardioceras – tentative report
- †Neohibolites
- †Neoparonaella
- †Neophylloceras
- †Neopopanoceras
- †Neopopanoceras haugi – type locality for species
- †Neopuzosia
Fossilized shell of the Jurassic-Cretaceous sea snail Nerinea - †Nerinea stewarti – type locality for species
- †Nerinella
- †Nerinella santana – type locality for species
- Nerita
- †Nerita orovillensis – tentative report
- Nodosarella
- Nodosaria
- †Nolita
- †Nonactaeonina
- †Nonactaeonina obesa
- †Nonactaeonina tensa – or unidentified comparable form
Restoration of several species of the Late Cretaceous ammonoid cephalopod Nostoceras - †Nostoceras excelsus – type locality for species
- †Nostoceras splendidum
- †Notidanodon
- †Notodonax
- †Novitripus
- †Novixitus
- †Nowakites
- †Nowakites dobbinsi – type locality for species
- †Nowakites klamathonis – type locality for species
- †Nowakites puertoensis – type locality for species
- †Nowakites rumseyensis – type locality for species
- Nucinella
- Nucleolites – report made of unidentified related form or using admittedly obsolete nomenclature
Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula - Nuculana
- †Nuculana grandensis – or unidentified related form
- †Nuculana translucida
- †Nudivagus – tentative report
- †Nudivagus califus – type locality for species
O
edit- †Obesacapsula
- †Obnixia – type locality for genus
- †Octopodichnus
- †Olanda
- †Omphaloptycha
- †Omphaloptycha obesa – type locality for species
- †Omphaloptycha shastensis – type locality for species
- Opalia
- †Ophiceras
- †Opis
- †Opis anae – type locality for species
- †Opis californica – type locality for species
- †Opis holzana
- †Opis pacifica
- †Opis popenoei – type locality for species
- †Opis rosarioensis
- †Opis triangulata – type locality for species
- †Opis vancouverensis
- †Orbiculiforma
- †Orbiculiformella
- †Ornithella
- †Ornithella curticensis – type locality for species
- †Ornithella gemina – type locality for species
- †Ornithella syringothyrides – type locality for species
- †Orthoceras
- †Orthoceras shastense – type locality for species
- †Orthotrigonia
- Ostrea
- †Owenites
- †Owenites carpenteri
- †Owenites koeneni – type locality for species
- †Oxybeloceras
- †Oxybeloceras petrolense
- †Oxybeloceras taffi – type locality for species
- †Oxyeurax
- †Oxynautilus
- †Oxytoma
- †Oxytropidoceras
P
edit- †Pachecocrinus
- †Pachydesmoceras
- †Pachydesmoceras colusaense
- †Pachydesmoceras pachydiscoide – type locality for species
Fossilized shell of the Late Cretaceous ammonoid cephalopod Pachydiscus - †Pachydiscus ashlandicus – or unidentified related form
- †Pachydiscus averilli – type locality for species
- †Pachydiscus binodatus – or unidentified comparable form
- †Pachydiscus buckhami
- †Pachydiscus catarinae – or unidentified related form
- †Pachydiscus coalingense
- †Pachydiscus egertoni – or unidentified comparable form
- †Pachydiscus henleyensis
- †Pachydiscus japonicus – or unidentified comparable form
- †Pachydiscus neevesi – or unidentified comparable form
- †Pachydiscus ootacodensis
- †Pachydiscus subcompressus
- †Pachyoncus
- †Paladmete – tentative report
- †Palaeastraea – report made of unidentified related form or using admittedly obsolete nomenclature
- †Palaeobates
- †Palaeobates shastensis – type locality for species
- †Palaeocypraea
- †Palaeocypraea fontana – type locality for species
- †Palaeocypraea wilfredi – type locality for species
- †Palaeomoera
- †Paleopsephaea
- †Paleotractus
- †Palinandromeda
- Panopea
- †Panopea californica – or unidentified related form
- †Pantanellium
- †Pantanellium buntonense – or unidentified comparable form
- †Pantanellium darlingtonense
- †Pantanellium deflectum
- †Pantanellium fishcreekensis
- †Pantanellium foveatum
- †Pantanellium josephinense
- †Pantanellium meraceibaense
- †Pantanellium rarum
- †Pantanellium riedeli
- †Pantanellium squinaboli
- †Pantanellium ultrasincerum
- †Paraganides – type locality for genus
- †Paraganides californicus – type locality for species
- †Parahauerites
- †Parahauerites ashleyi – type locality for species
- †Parahoplites
- †Parahoplites sjogreni – or unidentified related form
- †Parahsuum
- †Parahsuum izeense
- †Parahsuum mostleri
- †Parahsuum ovale
- †Parahsuum publicum
- †Parahsuum simplum
- †Parahsuum stanleyense
- †Parahsuum transiens – or unidentified comparable form
- †Parallelodon
- †Paranannites
- †Paranannites oviformis – type locality for species
- †Parapachydiscus
- †Parapachydiscus bidwelli – type locality for species
- †Parapachydiscus catarinae
- †Parapachydiscus cortinaensis – type locality for species
- †Parapachydiscus panochensis – type locality for species
- †Parapachydiscus peninsularis – or unidentified related form
- †Parapachydiscus stanislausensis – type locality for species
Fossilized shell of the Late Cretaceous ammonoid cephalopod Parapuzosia with a human indicating its size - †Parapuzosia arenaica – type locality for species
- †Parapuzosia giganteum – type locality for species
- †Parapuzosia hearni – type locality for species
- †Parapuzosia hindsi – type locality for species
- †Parapuzosia klamathonrae – type locality for species
- †Parapuzosia waringi
- †Paratropites
- †Parisculites
- †Paronaella
- †Paronaella aranae
- †Paronaella bandyi
- †Paronaella broennimanni – or unidentified related form
- †Paronaella cleopatraensis
- †Paronaella coalescenda
- †Paronaella egregia
- †Paronaella inornata
- †Paronaella nipomoensis
- †Paronaella obesa
- †Paronaella panda
- †Paronaella solanoensis – or unidentified comparable form
- †Partschiceras
- †Partschiceras grantzi – or unidentified comparable form
- †Parussuria
- †Parussuria compressa – type locality for species
- Parvamussium
- †Parvicingula
- †Parvicingula alamoensis
- †Parvicingula blowi
- †Parvicingula bluefordae
- †Parvicingula boesi
- †Parvicingula broqueta
- †Parvicingula citae
- †Parvicingula colemani
- †Parvicingula corona
- †Parvicingula cuyamaensis
- †Parvicingula deadhorsensis
- †Parvicingula dhimenaensis – or unidentified related form
- †Parvicingula excelsa
- †Parvicingula gorda
- †Parvicingula gracila
- †Parvicingula jonesi
- †Parvicingula khabakovi – or unidentified comparable form
- †Parvicingula obstinata
- †Parvicingula rothwelli
- †Parvicingula sanfilippoae
- †Parvicingula satura
- †Parvicingula thomesensis
- †Parvicingula turrita
- †Parvicingula whalenae
- †Parvicingula yehae
- †Parvivacca
- †Paskentana
- †Paskentana berryessaensis – type locality for species
- †Paskentana globosa – type locality for species
- †Paskentana paskentaensis
- Patella – report made of unidentified related form or using admittedly obsolete nomenclature
- †Patella sheehani – type locality for species
- †Patella stuarti – type locality for species
- †Patulibracchium
- †Patulibracchium grapevinensis
- †Patulibracchium henlei – or unidentified related form
- †Paxitropis
Shells of Pecten scallops - †Pecten cowperi
- †Pecten deformis – type locality for species
- †Pedalion
- †Pegaster – type locality for genus
- †Pegaster stichos – type locality for species
- †Pentacrinus
- †Pentacrinus asteriscus – tentative report
- †Pentzia
- Periploma
- †Periploma subgracile – or unidentified related form
- †Periplomya – tentative report
- †Perispyridium
- †Perispyridium alinchakense – or unidentified related form
- †Perispyridium bacatum
- †Perispyridium dangerpointense
- †Perispyridium gujohachimanense
- †Perispyridium neotamanense
- †Perispyridium ordinarium
- †Perissitys
- †Perissitys brevirostris
- †Perissitys colocara – type locality for species
- †Perissitys cretacea
- †Perissitys elaphia – type locality for species
- †Perissitys pacifica – type locality for species
- †Perissitys stantoni
Fossilized shell of the Late Cretaceous ammonoid cephalopod Peroniceras - †Peroniceras leei – or unidentified related form
- †Peroniceras shastensis
- †Pervinquieria
- †Pervinquieria furberi – type locality for species
- †Pervinquieria gainesana – type locality for species
- †Petasiforma
- Phanerolepida
- †Phanerolepida onoensis – type locality for species
- †Phantum
- †Phantum insperatum – or unidentified comparable form
- Pharella
- †Phelopteria
- †Phillippiella
- Pholadomya
- †Pholadomya diegoensis – or unidentified comparable form
- †Pholadomya subelongata
Life restoration of the Early Jurassic-Late Cretaceous ammonoid cephalopod Phylloceras - †Phylloceras gargantuum – type locality for species
- †Phylloceras pachecoense – type locality for species
- †Phylloceras velledae
- †Phyllopachyceras
- †Piarorhynchia
- †Piarorhynchia howardi – type locality for species
- †Piarorhynchia winnemae – type locality for species
- †Piestochilus – tentative report
- †Pinacoceras
- †Pinna
- †Pinna calamitoides
- †Pinna expansa – or unidentified comparable form
- †Pityostrobus
- †Pityostrobus calforniensis – type locality for species
- †Plesiotylosaurus
- †Pleuromya
- †Pleurotropites
- †Pleurotropites gabbi – type locality for species
- †Pleurotropites gracilis – type locality for species
- Plicatula
Mounted fossilized skeleton of the Late Cretaceous mosasaur Plotosaurus - †Podobursa
- †Podocapsa
- Polinices
- †Polinices mercedensis – type locality for species
- †Polinices shumardianus – tentative report
- †Polycyclus
- †Polyptychites
Fossilized shell of the Late Cretaceous ammonoid cephalopod Polyptychoceras - †Polyptychoceras obstrictum – or unidentified comparable form
- †Posidonia
- †Posidonia alpina
- †Posidonia jacksoni – type locality for species
- †Posidonia madisonensis – type locality for species
- †Potamides – tentative report
- †Potamides diadema
- †Potamides grovesi – type locality for species
- †Praeconocaryomma
- †Praeconocaryomma decora – or unidentified comparable form
- †Praeconocaryomma fasciata – tentative report
- †Praeconocaryomma immodica
- †Praeconocaryomma magnimamma – or unidentified comparable form
- †Praeconocaryomma media – or unidentified comparable form
- †Praeconocaryomma parvimamma – or unidentified comparable form
- †Praeconocaryomma prisca
- †Praeconocaryomma uhlensis
- †Praeconocaryomma whiteavesi – or unidentified comparable form
- †Praeconosphaera
- †Praeparvicingula
- †Praeparvicingula decora
- †Praeparvicingula discors – or unidentified related form
- †Praeparvicingula gemmata
- †Praeparvicingula holdsworthi
- †Praeparvicingula hurdygurdyensis
- †Praeparvicingula nebulosa
- †Praeparvicingula packsaddlensis
- †Praeparvicingula rotunda
- †Praeparvicingula saltata
- †Praeparvicingula sencilla
- †Praeparvicingula siskiyouensis
- †Praeparvicingula turpicula
- †Praewilliriedellum
- †Preflorianites
- †Preflorianites strongi – type locality for species
- †Preflorianites toulai
- †Prionocycloceras
- †Prionolobus
- †Prionolobus waageni – type locality for species
- †Prionotropis
- †Prionotropis casperi
- †Prionotropis hiltensis – type locality for species
- †Priscoficus – tentative report
- †Prisconatica
- †Proarcestes
- †Proarcestes carpenteri – type locality for species
- †Proarcestes pacificus
- †Proarcestes shastensis – type locality for species
- †Proarcestes traski – type locality for species
- †Proarcestes whitneyi
- †Proarcestes winnemae – type locality for species
- †Proclydonautilus
- †Proclydonautilus hessi – type locality for species
- †Proclydonautilus spirolobus
- †Proclydonautilus squawensis – type locality for species
- †Proclydonautilus stantoni – type locality for species
- †Proclydonautilus triadicus
- †Proclydonautilus ursensis – type locality for species
Life restoration of the Late Cretaceous mosasaur Prognathodon - †Prognathodon waiparaensis – or unidentified comparable form
- †Projuvavites
- †Projuvavites brockensis – type locality for species
- †Projuvavites strongi – type locality for species
- Propeamussium
- †Prosphingitoides
- †Prosphingitoides austini – type locality for species
- †Protexanites
- †Protocardia
- †Protovallupus
Fossilized shell of the Triassic ammonoid cephalopod Protrachyceras - †Protrachyceras storrsi – type locality for species
- †Protunuma
- †Protunuma japonicus
- †Protunuma multicostatus – or unidentified related form
- †Pseudacrochordiceras
- †Pseudacrochordiceras inyoense – type locality for species
- †Pseudanchura
- †Pseudhelicoceras
- †Pseudhelicoceras petersoni – type locality for species
- †Pseudocrucella
- †Pseudocymia – type locality for genus
- †Pseudocymia aitha – type locality for species
- †Pseudocymia aurora – type locality for species
- †Pseudocymia cahalli – type locality for species
- †Pseudodiadema
- †Pseudodictyomitra
- †Pseudoeucyrtis
- †Pseudoeucyrtis firmus
- †Pseudoeucyrtis hannai – or unidentified comparable form
- †Pseudoeucyrtis paskentaensis
- †Pseudogaleodea
- †Pseudoheliodiscus
Fossilized shell of a Pseudomelania sea snail - †Pseudomelania colusaensis – type locality for species
- †Pseudoperna
- †Pseudophyllites
- †Pseudoptera – tentative report
- †Pseudoristola
- †Pseudosageceras
- †Pseudothurmannia – tentative report
- †Pseudoxybeloceras
- †Pseudoxybeloceras lineatum – or unidentified comparable form
- †Pteraichnus
- †Pteroluter
- †Pteroluter othnius – type locality for species
Fossilized shell of the Jurassic-Cretaceous marine bivalve Pterotrigonia - †Pterotrigonia evansana
- †Pterotrigonia klamathonia
- †Pterotrigonia oregana – or unidentified comparable form
- †Ptilorhynchia – type locality for genus
- †Ptilorhynchia plumasensis – type locality for species
- †Ptiloteuthis – type locality for genus
- †Ptiloteuthis foliatus – type locality for species
- †Ptychoceras – type locality for genus
- †Ptychoceras laeve – type locality for species
- †Ptyctothyris
- †Ptyctothyris hardgravensis – type locality for species
- †Ptyctothyris phlegethontis – type locality for species
- †Pugnellus
- †Pugnellus hammulus – or unidentified related form
- †Pugnellus hamulus
- †Pugnellus manubriatus
- †Puzosia
- †Puzosia hannai – type locality for species
- †Puzosia puma
- †Puzosia sullivanae
Assemblage of fossilized shells of the Cretaceous-Pleistocene oyster Pycnodonte - †Pyktes
- †Pyramispongia
- †Pyropsis
Q
edit- Quadrans – tentative report
- †Quinquecapsularia
R
edit- †Radioceras
- †Remondia
- †Remondia oregonensis – type locality for species
- †Reptolunulites
- Retusa
- †Rhabdoceras
- †Rhactorhynchia
- †Rhactorhynchia trigona – type locality for species
- †Rhaetina – tentative report
- †Rhectomax
- †Rhectomyax
Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella - †Rhynchonella richardsoni – type locality for species
- †Rhynchonella varians – or unidentified comparable form
- †Riedelius
- †Ristola
- Robulus
- Rogerella
- †Romaniceras
S
edit- †Sagenites
- †Sagenites dickersoni – type locality for species
- †Saghalinites
- †Sandlingites
- †Sandlingites andersoni – type locality for species
- †Sandlingites oribasus
- †Sarasinella
- †Saturniforma
- †Scalarites
Restoration of several of the Early Cretaceous-Miocene shark Scapanorhynchus - Scaphander
- †Scaphites
- †Scaphites hippocrepis – or unidentified related form
- †Scaphites inermis – or unidentified related form
- †Scaphites pittensis – type locality for species
- †Scaphotrigonia
- †Sciponoceras
- †Sciponoceras gracile – type locality for species
- Scobinella
- †Semihsuum
- †Senis
- Septifer
- †Sequoia
- Serpula
Life restoration of three species of the Middle-Late Triassic ichthyosaur genus Shastasaurus - †Shasticrioceras
- †Shasticrioceras whitneyi – or unidentified related form
- †Shastites
- †Shastites compactus – type locality for species
- †Shastites compressus – type locality for species
- †Shastites whitneyi – type locality for species
- †Shastoceras
- †Silberlingia
- †Simbirskites
- Siphonalia
- †Sirenites
- †Sirenites lawsoni – type locality for species
- †Skolithos
- Solariella
- Solemya – tentative report
- Solen
- †Solen cuneatus – or unidentified comparable form
- †Solenoceras
- †Spiriferina – report made of unidentified related form or using admittedly obsolete nomenclature
- †Spiriferina coreyi – type locality for species
- †Spirigera – report made of unidentified related form or using admittedly obsolete nomenclature
- †Spirigera milesi – type locality for species
- †Spirogmoceras
- †Spirogmoceras shastense – type locality for species
- †Spondylospira
- Spondylus
- †Spongiomorpha
- †Spongocapsula
- †Spongosaturninus
Life restoration of the Late Cretaceous shark Squalicorax - †Staurolonche
- Stichocapsa
- Stichomitra – tentative report
- †Stoliczkaia
- †Stoliczkaia praecursor – type locality for species
- †Stomechinus
- †Striatojaponocapsa
- †Stromatomorpha
- †Stromatomorpha californica – type locality for species
- †Sturia
- †Subhungarites
- †Subhungarites yatesi – type locality for species
- †Submeekoceras
- †Submortoniceras
- †Submortoniceras buttense
- †Submortoniceras buttensis – type locality for species
- †Submortoniceras chicoense
- †Submortoniceras gabbi
- †Submortoniceras pentzanum – type locality for species
- †Submortoniceras randalli
- †Submortoniceras studleyi
- †Subprinocyclus
- †Subprionocyclus
- †Subprionocyclus branneri
- †Subprionocyclus neptuni – or unidentified comparable form
- †Subprionocyclus normalis – or unidentified comparable form
- †Subprionocyclus oregonense
- † Suna
- †Sympolycyclus
- †Sympolycyclus kellyi – type locality for species
- †Sympolycyclus nodifer – type locality for species
- †Syncyclonema
- †Syncyclonema latum – type locality for species
- †Syncyclonema operculiformis
T
edit- †Tappanella
- †Tardeceras – type locality for genus
- †Tardeceras parvum – type locality for species
- †Tegula
- †Tehamatea
- †Teichertus
Shell of a Tellina, or tellin - †Tenea
- †Teneposita – type locality for genus
- †Teneposita laeva – type locality for species
A living Terebralia horn sea snail - Terebratella
- Terebratulina
- †Terebratulina indomita – type locality for species
- †Tessarolax
- †Tethysetta
- †Tetracapsa
- †Tetraditryma
- †Tetragonites
- †Tetragonites cala
- †Tetragonites epigonum
- †Tetragonites glabrus – or unidentified comparable form
- †Tetragonites popetensis – type locality for species
- †Tetrahoplitoides
Reconstructive illustration of the skull in side (above) and top view of the Late Triassic thalattosaur Thalattosaurus. The frontmost portion of the snout is portrayed erroneously as straight; it actually had a pronounced downward curve - †Thanarla
- †Thetironia
- †Thisbites
- †Thurmanniceras
- Thyasira
- †Tibetothyris – report made of unidentified related form or using admittedly obsolete nomenclature
- †Tibiaporrhais – tentative report
- †Tollia
- †Tornatellaea
- †Tornquistites – type locality for genus
- †Tornquistites evolutus – type locality for species
- †Trachybaculites
- †Trachysagenites
- †Trachysagenites erinaceus
- †Trachysagenites herbichi
- †Trachysagenites shastensis – type locality for species
- †Trachystenoceras
- †Trachystenoceras gabbi – type locality for species
- †Tragodesmoceras
- †Trajanella
- †Transhsuum
- †Traskites
- †Traskites americanus – type locality for species
- †Traskites californicus – type locality for species
- †Traskites evolutus – type locality for species
- †Traskites fairbanksi – type locality for species
- †Traskites minutus – type locality for species
- †Traskites nanus – type locality for species
- †Traskites osmonti – type locality for species
- †Traskites robustus – type locality for species
- †Traskites rugosus – type locality for species
- †Traskites stantoni – type locality for species
- †Traskites tornquisti – type locality for species
- †Triactoma
- †Trichinopolia
- †Trichinopolia californica – type locality for species
- Tricolocapsa
- †Trigonarca
- †Trigonarca californica – or unidentified related form
- †Trigonarca californicus
- †Trigonarca excavata
Fossilized shell of the Permian-Paleocene marine bivalve Trigonia - †Trigonia aequicostata
- †Trigonia denticulata – or unidentified comparable form
- †Trigonia evansana
- †Trigonia fitchi
- †Trigonia hemisphaerica – or unidentified related form
- †Trigonia hemphilli
- †Trigonia inezana – or unidentified related form
- †Trigonia jacksonensis – type locality for species
- †Trigonia leana
- †Trigonia perrinsmithi – type locality for species
- †Trigonia plumasensis – type locality for species. Later reclassified in the new genus Californigonia as C. plumasensis.[1]
- †Trigonia spinulosa – or unidentified comparable form
- †Trigonia tryoniana
- †Trigonia undulata
- †Trigonia vcostata – or unidentified comparable form
- †Trigonocallista
- †Trillus
- †Trillus elkhornensis
- †Trillus seiderense – or unidentified comparable form
- †Trinacria
- †Tripocyclia
- †Tritrabs
- †Triversus
Fossilized shell in multiple views of the Early-Late Cretaceous sea snail Trochactaeon - Trochocyathus
- †Trochocyathus pergranulatus – type locality for species
- Trophon
- †Tropiceltites
- †Tropites
- †Tropites arthaberi
- †Tropites brockensis – type locality for species
- †Tropites dieneri – type locality for species
- †Tropites dilleri – type locality for species
- †Tropites fusobullatus
- †Tropites hessi – type locality for species
- †Tropites keili
- †Tropites kellyi – type locality for species
- †Tropites mojsvarensis – type locality for species
- †Tropites morani – type locality for species
- †Tropites reticulatus
- †Tropites rotatorius – type locality for species
- †Tropites rothpletzi – type locality for species
- †Tropites schellwieni – type locality for species
- †Tropites shastensis – type locality for species
- †Tropites stearnsi – type locality for species
- †Tropites ursensis – type locality for species
- †Tropites welleri – type locality for species
- †Tropites wodani
- †Turanta
- †Turanta chetcoensis
- †Turanta flexa
- †Turanta luminosa
- †Turanta okamurai – or unidentified comparable form
- †Turrilites
- †Turrilites acutus
- †Turrilites costatus – or unidentified comparable form
- †Turrilites petersoni – type locality for species
Fossilized shells of the Late Jurassic-modern tower snail Turritella - †Turritella chaneyi
- †Turritella chicoensis
- †Turritella hearni
- †Turritella infralineata
- †Turritella peninsularis – or unidentified related form
- †Turritella pescaderoensis
- †Turritella peterseni – or unidentified related form
- †Turritella petersoni
- †Turritella robertiana – or unidentified comparable form
- †Turritella webbi
- †Turritella xylina
- †Tylostoma
- †Tylostoma garzana – type locality for species
U
editV
edit- †Vallupus
- †Vaugonia
- †Vaugonia kobayashii – or unidentified comparable form
- †Vaugonia obliqua
- †Vaugonia yukonensis – tentative report
- †Vitorfus
- Volsella
- †Volutoderma
W
edit- †Wilbertopora
- †Wilbertopora sannerae – type locality for species
- †Willimactra
- †Williriedellum
- †Wilvemia
- †Worthenia
- †Worthenia klamathensis – type locality for species
- †Wrangellium
- †Wyomingites
X
editY
edit- †Yaadia
- †Yaadia branii – or unidentified comparable form
- †Yaadia hemphilli
- †Yaadia robusta
- †Yaadia tryoniana
- †Yezoites
- †Yezoites puerculus – or unidentified comparable form
- Yoldia
Z
edit- †Zanola
- †Zanola cornuta – or unidentified comparable form
- †Zartus
- †Zealandites
- †Zhamoidellum
- †Zifondium
- †Zimmerella – type locality for genus
- †Zinsitys – tentative report
- †Zugmayerella
- †Zugmeyeria
References
edit- ^ a b c Michael R. Cooper; Héctor A. Leanza (2019). "On the Middle Jurassic – Early Cretaceous Megatrigoniinae (Bivalvia, Trigoniida): their biogeography, evolution and classification". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 291 (1): 19–40. doi:10.1127/njgpa/2019/0787.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
