List of the Mesozoic life of California

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.

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Contents

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• I
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• 

  Diagram depicting the soft part anatomy of the sea snail Abyssochrysos

  † Abyssochrysos – tentative report
  • † 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
  • † Acanthocircus aculeatus
  • † Acanthocircus carinatus – or unidentified related form
  • † Acanthocircus dendroacanthos
  • † Acanthocircus dicranocanthos
  • † Acanthocircus meyerhofforum
  • † Acanthocircus multidentatus
  • † Acanthocircus polymorphus
  • † Acanthocircus suboblongus
  • † Acanthocircus trizonalis
• Acanthosphaera – tentative report
  • † Acanthosphaera lucida
• † Acastea
  • † Acastea acer
  • † Acastea bipes
  • † Acastea dura
  • † Acastea incontraria
  • † Acastea remusa
  • † Acastea tenuis
• Acesta
• Acharax
  • † Acharax stantoni
• Acila
  • † Acila demessa
  • † Acila princeps
• † Acrioceras
  • † Acrioceras hamlini
  • † Acrioceras vespertinum

• 

  Fossilized teeth of the Permian-Paleocene cartilaginous fish Acrodus

  † Acrodus
  • † Acrodus wempliae – type locality for species
• † Acteon
  • † Acteon inornatus
  • † Acteon politus
  • † Acteon sullivanae
• † Acteonella
  • † Acteonella oviformis
• † Acteonina
  • † Acteonina berryessensis – type locality for species
  • † Acteonina californica
  • † Acteonina columnaris
• † Acusten
  • † Acusten ordinarius
• † Adelodonax
  • † Adelodonax altus
• † Aechmella
• † Agnomyax
  • † Agnomyax monilifer
• † Aguileria – or unidentified comparable form
• † Alarimella
  • † Alarimella anae – type locality for species
  • † Alarimella veta

• 

  Life restoration of the Late Cretaceous armored dinosaur Aletopelta

  † Aletopelta – type locality for genus
  • † Aletopelta coombsi – type locality for species
• † Alievium
  • † Alievium antiquum
• Amauropsis
  • † Amauropsis pseudoalveata
• † Ambercyclus
  • † Ambercyclus dilleri
  • † Ambercyclus morganensis
• † Amphidonte
  • † Amphidonte parasitica

• 

  Fossilized shell of the Jurassic-Miocene sea snail Ampullina

  † Ampullina
  • † Ampullina avellana
  • † Ampullina concipio
  • † Ampullina mona
  • † Ampullina oviformis
  • † Ampullina packardi
  • † Ampullina stantoni
• Amuletum
• † Anagaudryceras
  • † Anagaudryceras mikobokense
  • † Anagaudryceras sacya – or unidentified comparable form
• † Anahamulina
  • † Anahamulina wilcoxensis
• † 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
  • † Anatropites hauchecornei
• † 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
  • † Anglonautilus catarinae
• † Angulobracchia
  • † Angulobracchia bulbosa
  • † Angulobracchia jasperensis
  • † Angulobracchia ozvoldovae
  • † Angulobracchia purisimaensis
• † Anisoceras
  • † Anisoceras draconum
• † Anisomyon
  • † Anisomyon meeki
• † Anomalina
  • † Anomalina pseudopopillosa

• 

  Interior and exterior of a shell of an Anomia , or jingle shell

  † Anomia
  • † Anomia – type locality for species A – informal
  • † Anomia jalama
  • † Anomia lineata
• † Anoplophora – tentative report
  • † Anoplophora shastensis – type locality for species
• † Anthonya
  • † Anthonya cultriformis
• † Aphaea
  • † Aphaea ignota
• † Aphanoptyxis
  • † Aphanoptyxis andersoni
  • † Aphanoptyxis californica – type locality for species
• † Aphrodina
  • † Aphrodina varians
• † Aphrosaurus
  • † Aphrosaurus furlongi

• 

  Multiple views of a shell of an Aporrhais pelican foot sea snail

  Aporrhais
  • † Aporrhais veta – type locality for species
• † Archaeocenosphaera
  • † Archaeocenosphaera ruesti – or unidentified related form
• † Archaeodictyomitra
  • † Archaeodictyomitra apiarium
  • † Archaeodictyomitra inornata
  • † Archaeodictyomitra oleadita
  • † Archaeodictyomitra rigida
  • † Archaeodictyomitra simplex
  • † Archaeodictyomitra siplex
  • † Archaeodictyomitra sliteri
  • † Archaeodictyomitra vulgaris
• † Archaeohagiastrum
  • † Archaeohagiastrum minutum – or unidentified related form
• Archaeolithothamnium
• † Archaeopus
  • † Archaeopus antennatus
• † 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

  Architectonica – tentative report
• Arcopagia
  • † Arcopagia tehama
• Arctica
  • † Arctica anthracocola
  • † Arctica denmanensis – or unidentified related form
• † Arctoceras
  • † Arctoceras tuberculatum
• † Areaseris
  • † Areaseris nevadensis
• Argyrotheca
  • † Argyrotheca retrorsa – type locality for species

• 

  Fossilized shell of the Early Jurassic ammonoid cephalopod Arnioceras

  † Arnioceras
• † Arpadites
  • † Arpadites kingi – type locality for species
• Arrhoges
  • † Arrhoges californicus
• † Aspenites – type locality for genus
  • † Aspenites acutus
• 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
  • † Atresius liratus
• † Aucellina – tentative report

• 

  Fossilized partial skull of the Late Cretaceous duck-billed dinosaur Augustynolophus

  † Augustynolophus
  • † Augustynolophus morrisi
• Avicula
  • † Avicula mucronata – type locality for species
  • † Avicula soperi – type locality for species
• † Axonoceras

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
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• M
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• P
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• † Bacchites
  • † Bacchites hyatti – type locality for species
  • † Bacchites pinguis

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites

  † 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
  • † Bagotum modestum
• † Balantiostoma – tentative report
• Barbatia
• † Barrettia
  • † Barrettia sparcilirata

• 

  Mounted fossilized skeleton of the Cretaceous turtle Basilemys

  † Basilemys
• † Bathypurpurinopsis
  • † Bathypurpurinopsis stantoni – type locality for species
• † Belleza
  • † Belleza decora
• † Belliscala
  • † Belliscala meta
• 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
  • † Bernoullius brokenkettlensis
  • † Bernoullius cristatus
  • † Bernoullius delnortensis
  • † Bernoullius dicera
  • † Bernoullius irwini
• † 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
  • † Bivallupus mexicanus
• † Bochianites
  • † Bochianites paskentaensis
• † Bolena
  • † Bolena zancajosa
• † Bositra
  • † Bositra buchi

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Bostrychoceras

  † Bostrychoceras
  • † Bostrychoceras brewerii
  • † Bostrychoceras californicum – type locality for species
  • † Bostrychoceras declive
  • † Bostrychoceras occidentale – type locality for species
  • † Bostrychoceras otsukai – or unidentified related form
• † Brancoceras
  • † Brancoceras parvum
• † 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
  • † Bulimina obtusa

• 

  A living Bulimulus land snail

  Bulimulus
• † Bullamirifica
  • † Bullamirifica ainiktos
  • † Bullamirifica elegans
• Bullaria
  • † Bullaria nortonensis
• Bullina
  • † Bullina yoloensis – type locality for species
• † Butticeras
  • † Butticeras studleyi – type locality for species

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
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• P
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• † Califadesma
  • † Califadesma elaphium
• † 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

  † 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
  • † Callistalox fragilis
• † Calva
  • † Calva crassa
  • † Calva elderi
  • † Calva nitida
  • † Calva peninsularis
  • † Calva spissa
  • † Calva taffi
  • † Calva varians

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Calycoceras

  † Calycoceras
  • † Calycoceras naviculare
• † 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
  • † Canelonus conus
• † Caneta
  • † Caneta hsui
• † Canoptum
  • † Canoptum anulatum
  • † Canoptum poissoni
  • † Canoptum rugosum
• Cantharus
  • † Cantharus occidentalis
• † Canutus
  • † Canutus giganteus
  • † Canutus rockfishensis

• 

  Shells of modern Capulus cap sea snails

  Capulus – or unidentified comparable form
  • † 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
  • † Cassideus yoloensis
• † Cecrops
  • † Cecrops septemporata
  • † Cecrops septemporatus
• † Celtites
  • † Celtites steindachneri
• Cenodiscus
  • † Cenodiscus alievi
• Cenosphaera
  • † Cenosphaera boria
• † Ceriostella
  • † Ceriostella martini
• Cerithidea

• 

  Two views of a Cerithium cerith sea snail

  Cerithium
  • † 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

  Cidaris
  • † Cidaris californicus
  • † Cidaris plumasensis
  • † Cidaris taylorensis
• † Cladoceramus
  • † Cladoceramus undulatoplicatus
• † Clinura
  • † Clinura anassa
• † Clisocolus
  • † Clisocolus cordatus
  • † Clisocolus corrugatus
  • † Clisocolus dubius

• 

  Fossilized shell of the Late Cretaceous ammonoid Collignoniceras

  † Collignoniceras
  • † Collignoniceras bakeri
• † Collonia
  • † Collonia occidentalis – type locality for species
• † Cophocara
  • † Cophocara stantoni
• † Coralliochama
  • † Coralliochama orcutti
• Corbicula
  • † Corbicula astartoides
• 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
  • † Costispiriferina pittensis
• † Courtilloticeras
  • † Courtilloticeras stevensi – type locality for species
• Crassatella
  • † Crassatella conradiana
  • † Crassatella mercedensis – tentative report
  • † Crassatella saulae
  • † Crassatella triangulata
  • † Crassatella triangulatus
• † Crassatellina
  • † Crassatellina saulae

• 

  Fossilized shell of the Early Cretaceous ammonoid cephalopod Crioceratites

  † Crioceratites
  • † Crioceratites latus
  • † Crioceratites tehamaensis – or unidentified comparable form
• † Crolanium
  • † Crolanium triquetrum
• † Crucella
  • † Crucella linda
  • † Crucella magna
  • † Crucella messinae
  • † Crucella theokaftensis
• Cucullaea
  • † Cucullaea alamoensis – type locality for species
  • † Cucullaea bowersiana
  • † Cucullaea gravida
  • † Cucullaea truncata
  • † Cucullaea youngi
• † Cunningtoniceras
  • † Cunningtoniceras meridionale – or unidentified related form
• † Cyclothyris
  • † Cyclothyris densleonis
• Cylichna
  • † Cylichna andersoni
• † Cylindroteuthis

• 

  Fossilized shell of the Late Jurassic-Oligocene nautiloid cephalopod Cymatoceras

  † 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

  † Cymbospondylus
  • † Cymbospondylus petrinus
• † Cymulopora – tentative report
• † Cyprimeria
  • † Cyprimeria moorei
• Cyrtocapsa – tentative report
  • † Cyrtocapsa kisoensis – or unidentified related form

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

• † 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

  † Daonella – tentative report
  • † Daonella dubia
• † Darvelus
  • † Darvelus pessagnoi – type locality for species
  • † Darvelus primus – type locality for species
• Dentalina
  • † Dentalina legumen
• † Dentalium
  • † Dentalium cooperi
  • † Dentalium nanaimoense
  • † Dentalium whiteavesi

• 

  Fossilized shells of the Early Cretaceous ammonoid cephalopod Desmoceras

  † 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
  • † Deviatus deweveri
  • † Deviatus hipposidericus
• † Diacanthocapsa
• † Dicerosaturnalis
  • † Dicerosaturnalis dicranacanthos
• † Dicroa
• † Dicroloma
  • † Dicroloma nodosa
• † Dictyoconites
  • † Dictyoconites americanus – type locality for species
• † Dictyomitra
• † Dictyomitrella
  • † Dictyomitrella kamoensis

• 

  Restoration of several species of the Late Cretaceous ammonoid cephalopod Didymoceras

  † 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
  • † Diplodonta davisi
• † Diplomoceras
  • † Diplomoceras ellipticum
  • † Diplomoceras jimboi – type locality for species
  • † Diplomoceras mustangense – type locality for species
• † Discohelix – tentative report
  • † Discohelix leana
• † Discophyllites
  • † Discophyllites patens
• † Discoproptychites
  • † Discoproptychites walcotti – type locality for species

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Discoscaphites

  † 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
  • † Distichophyllia norica

• 

  Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Douvilleiceras

  † Douvilleiceras
  • † Douvilleiceras mammillatum – or unidentified comparable form
• † Drepanochilus
  • † Drepanochilus transversus
• † Drilluta – tentative report
• † Droltus
• † Dumitricaella – tentative report
  • † Dumitricaella cucurbitina – or unidentified related form
• † Durania
  • † Durania californica – type locality for species

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
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• R
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• U
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• X
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• † Echinocorys
  • † Echinocorys yoloensis – type locality for species
• † Elimia
  • † Elimia veatchii
• † Ellipsoscapha
  • † Ellipsoscapha nortonensis – or unidentified comparable form
  • † Ellipsoscapha skaios
• † Emiluvia
  • † Emiluvia chica
  • † Emiluvia dollarbendensis
  • † Emiluvia fontana
  • † Emiluvia hopsoni
  • † Emiluvia lowercoonensis
  • † Emiluvia nana
  • † Emiluvia pessagnoi
  • † Emiluvia premyogii

• 

  Restoration of the Early Cretaceous-Eocene bony fish Enchodus , or the "saber-toothed herring"

  † Enchodus
• † Endoptygma
  • † Endoptygma hermax – type locality for species
• † Entobia
• † Entolium
  • † Entolium equabile
  • † Entolium meeki
  • † Entolium pittensis – type locality for species
• † Eocomoseris
  • † Eocomoseris ramosa
• † Eocypraea
  • † Eocypraea louellae – type locality for species
• † Eodanubites
  • † Eodanubites judae – type locality for species
• † Eogaudryceras
  • † Eogaudryceras wintunius
• † Eogunnarites
  • † Eogunnarites matsumotoi
• † Eospongosaturninus
  • † Eospongosaturninus protoformis
• † Eripachla
  • † Eripachla ponderosa
• † Eripachya
  • † Eripachya ponderosa
• † Eriphyla
  • † Eriphyla lapida
  • † Eriphyla lapidus
  • † Eriphyla umbonata
• † Etea
  • † Etea occidentalis
• † Eucalycoceras
  • † Eucalycoceras diabloense – type locality for species

• 

  Illustration of the fossilized skull of the sea turtle Euclastes

  † Euclastes
• † Eucymatoceras
  • † Eucymatoceras plicatum
• † Eucyrtidiellum
  • † Eucyrtidiellum ptyctum
  • † Eucyrtidiellum takemurai
  • † Eucyrtidiellum unumaense
• † Eucyrtidium – tentative report
• † Euidothyris
  • † Euidothyris lucerna – type locality for species
• † Euomphaloceras
  • † Euomphaloceras septemseriatum
• † Eupachydiscus
  • † Eupachydiscus arbucklensis – type locality for species
  • † Eupachydiscus haradai
  • † Eupachydiscus lamberti – or unidentified related form
  • † Eupachydiscus willgreeni – type locality for species
• † Euspira
  • † Euspira compressa
  • † Euspira marianus
  • † Euspira popenoei
  • † Euspira shumardiana
• † Eutrephoceras
  • † Eutrephoceras campbelli

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Exiteloceras

  † 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

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Contents

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• I
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• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Fagesia

  † Fagesia
  • † Fagesia catinus – type locality for species
  • † Fagesia klamathensis – type locality for species
• Fissurella – tentative report
• † Flabellina
  • † Flabellina pilulifera
• † Flabellirhynchia
  • † Flabellirhynchia concinna – type locality for species
  • † Flabellirhynchia falconis – type locality for species
• † Flabellum
  • † Flabellum fresnoense – type locality for species
• † Flaventia
  • † Flaventia lens
• † Foremanina
• † Francisciconcha
  • † Francisciconcha maslennikovi
• † Fresnosaurus – type locality for genus
  • † Fresnosaurus drescheri – type locality for species
• Frondicularia
  • † Frondicularia undulosa – or unidentified comparable form

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Contents

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• I
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• M
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• † Gabbioceras
  • † Gabbioceras angulatum
• † Garzasia
  • † Garzasia diabla
  • † Garzasia intermedia – or unidentified comparable form
• Gastrochaena – tentative report

• 

  Fossilized shell of the Cretaceous ammonoid cephalopod Gaudryceras

  † 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
  • † Gervillia shastensis
• Glans – tentative report
  • † Glans veneriformis
• † 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
  • † Glossus delta

• 

  Fossilized shell of a Glycymeris , or bittersweet clam

  Glycymeris
  • † 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
  • † Gnomohalorites americanus
• Gongylothorax
  • † Gongylothorax oblongus – or unidentified related form
• † Goniojuvavites
  • † Goniojuvavites kellyi – type locality for species
• † Gonionotites
  • † Gonionotites northi – type locality for species
• † Gorgansium
  • † Gorgansium pulchrum
• † Goricanites – type locality for genus
  • † Goricanites noblei – type locality for species

• 

  Fossil negative with skin impressions of the theropod dinosaur footprint ichnogenus Grallator

  † Grallator
• † Grammatodon
  • † Grammatodon vancouverensis
• † Gryphaea
• † Gryponautilus
  • † Gryponautilus cooperi – type locality for species
• † Guexella
• † Guineana
  • † Guineana alta
• † 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
  • † Gyroidina depressa

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• 

  A living Haliotis , or abalone

  Haliotis
• † Halobia
  • † Halobia austriaca
  • † Halobia cordillerana
  • † Halobia gigantea
  • † Halobia ornatissima
  • † Halobia rugosa
  • † Halobia superba
• † Hauericeras
  • † Hauericeras angustum
  • † Hauericeras churchi – type locality for species
  • † Hauericeras mickeyi – type locality for species
• † Hauerites
  • † Hauerites lawsoni – type locality for species
• † Haydenia
  • † Haydenia impressa
• † Hecticoceras

• 

  Fossilized shell of the Triassic ammonoid cephalopod Hedenstroemia

  † Hedenstroemia
  • † Hedenstroemia kossmati
• † Helena
  • † Helena exquisita
• † Helicaulax
  • † Helicaulax popenoei – type locality for species
• Hemiaster
  • † Hemiaster californicus
• † Hemicidaris
  • † Hemicidaris intumescens
• † Hemicryptocapsa
  • † Hemicryptocapsa ruesti – or unidentified related form

• 

  Modern individual of the Cretaceous-modern cow shark genus Heptranchias

  Heptranchias
• † Hertleinites
  • † Hertleinites aguila
  • † Hertleinites pecki
• † Heteroderma
• † Hexasaturnalis
  • † Hexasaturnalis hexagonus
• † Hexasphaera
  • † Hexasphaera baumgartneri
• † 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

  Hipponix
  • † Hipponix dichotomus
• † 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
  • † Hollisites inflatus
  • † Hollisites lucasi
• † Holocryptocanium
  • † Holocryptocanium astiensis
  • † Holocryptocanium barbui
  • † Holocryptocanium geysersensis
  • † Holocryptocanium tuberculatum
• † Homerites
  • † Homerites semiglobosus
• † Homoeoparonaella
  • † Homoeoparonaella barbata
  • † Homoeoparonaella elegans
  • † Homoeoparonaella gigantea
  • † Homoeoparonaella glinesi
  • † Homoeoparonaella radians
  • † Homoeoparonaella scurrae
• † Homolsomites
  • † Homolsomites mutabilis
• † Hoplocrioceras
  • † Hoplocrioceras ducanense
  • † Hoplocrioceras duncanense
  • † Hoplocrioceras remondi
• † Hoplotropites
  • † Hoplotropites jokelyi
• † Hormathospongia – type locality for genus
  • † Hormathospongia dictyota – type locality for species
• † Hsuum
  • † Hsuum baldfacense
  • † Hsuum brevicostatum
  • † Hsuum maxwelli
  • † Hsuum mclaughlini
  • † Hsuum naturale
  • † Hsuum obispoensis
  • † Hsuum rutogense
  • † Hsuum santamariaense
  • † Hsuum speciosum

• 

  Restoration of two of the Permian-Late Cretaceous cartilaginous fish Hybodus

  † 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

I

Contents

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• † Icantia

• 

  Restoration of the Late Cretaceous toothed bird Ichthyornis

  † Ichthyornis
• † Ichthyosaurus
  • † Ichthyosaurus californicus – type locality for species
  • † Ichthyosaurus franciscanus – type locality for species
• † Igonoia
  • † Igonoia shastana
• † Indonesites
  • † Indonesites sphaericus

• 

  Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size

  † Inoceramus
  • † 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
  • † Inoperna bellarugosa
• † 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
  • † Isocrinus californicus

• 

  Fossilized shell of the Permian-modern marine bivalve Isognomon

  Isognomon
  • † Isognomon – type locality for species – informal

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Contents

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• † Jeanbesseiceras – tentative report
  • † Jeanbesseiceras jacksoni
• † Joaquinites – type locality for genus
  • † Joaquinites fascicostatum – type locality for species
• † Jovites
  • † Jovites pacificus – type locality for species
• Jupiteria
• † Juvavites
  • † Juvavites knowltoni
  • † Juvavites subinterruptus
• † Juvenites
  • † Juvenites dieneri – type locality for species

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• 

  Fossilized shells of the Jurassic brachiopod Kallirhynchia

  † 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
  • † Kilianella crassiplicata
• † Kilinora
  • † Kilinora catenarum
  • † Kilinora spiralis
• † Klamathites
  • † Klamathites kellyi
  • † Klamathites schucherti – type locality for species

• 

  Fossilized shell of the Early Cretaceous ammonoid cephalopod Kossmaticeras

  † Kossmaticeras
  • † Kossmaticeras japonicum – or unidentified related form
• † Kozurium
  • † Kozurium corningensis
  • † Kozurium zingulai
• † Kuhnastraea
  • † Kuhnastraea decussata

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
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• M
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• † Laballa
  • † Laballa suessi – or unidentified comparable form
• † Lacunaria
  • † Lacunaria striata
• † Lampasa
  • † Lampasa blomei
• † Lanceolites – type locality for genus
  • † Lanceolites bicarinatus
  • † Lanceolites compactus
• † Lanubus
• Laternula – tentative report
  • † Laternula alisoensis
• † Latidorsella
  • † Latidorsella barryae – type locality for species
• † Latimaeandra – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Latimaeandra eucystis
• † 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
  • † Legumen ooides
• † Leptosolen
• † Leugeo
  • † Leugeo ordinarius
  • † Leugeo parvispinata
• † Levileugeo
• Lima
  • † Lima – type locality for species A – informal
  • † Lima beta
  • † Lima costata
  • † Lima kimballi – type locality for species
  • † Lima terqueni
• Limopsis
  • † Limopsis silveradoensis
• † Linaresia
• † Linearis
  • † Linearis multicostata – or unidentified comparable form
• † Lingula
• † Lipmanium – tentative report
  • † Lipmanium caseyi
• † Lisopithia
  • † Lisopithia ana
• † Lispodesthes
  • † Lispodesthes rotundatus
  • † Lispodesthes rotundus
• † Lithiotis
  • † Lithiotis problematica
• † Lithomphalus
  • † Lithomphalus enderlini
• 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

  Lopha
• Loripes – tentative report
  • † Loripes dubia
• † Loxo
  • † Loxo decore
• † Lucina
• † Lyriochlamys
  • † Lyriochlamys traskii
• † Lysis
  • † Lysis californica
  • † Lysis duplicosta
  • † Lysis suciensis – or unidentified comparable form

• 

  Fossilized shell of the Early Jurassic-Late Cretaceous ammonoid cephalopod Lytoceras

  † Lytoceras
  • † Lytoceras aulaeum
  • † Lytoceras batesi
  • † Lytoceras saturnale
  • † Lytoceras traski – or unidentified comparable form
  • † Lytoceras whitneyi

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Contents

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• B
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• D
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• G
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• I
• J
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• Macrocallista
  • † Macrocallista cordata – or unidentified related form

• 

  Fossilized shell of the Middle Jurassic ammonoid cephalopod Macrocephalites

  † Macrocephalites
• † Madrasites
  • † Madrasites voyanum – type locality for species
• † Mammites – tentative report
• † Mantelliceras
  • † Mantelliceras lecontei – or unidentified comparable form
• Margarella
  • † Margarella crenulata
• † Margariella – tentative report
• † Margaritella
  • † Margaritella globosa
• 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
  • † Marginotruncana marginata
  • † Marginotruncana renzi
• Marginulina
  • † Marginulina elongata

• 

  Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Mariella

  † Mariella
  • † Mariella bergeri
  • † Mariella fricki
• Martesia
  • † Martesia clausa
• † 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
  • † Meekoceras gracilitatis
  • † Meekoceras newberryi
  • † Meekoceras strongi
• † Melchiorites
  • † Melchiorites shastensis

• 

  Assemblage of fossilized shells of the Late Cretaceous ammonoid cephalopod Menuites

  † Menuites
  • † Menuites arrialoorensis – or unidentified related form
  • † Menuites siskiyouensis
• † Merriamia
  • † Merriamia zitteli
• † Mesopuzosia
  • † Mesopuzosia colusaense
  • † Mesopuzosia intermedia – or unidentified comparable form
  • † Mesopuzosia pacifica – or unidentified comparable form
• † Metacerithium – tentative report
• † Metaplacenticeras
  • † Metaplacenticeras californicum
  • † Metaplacenticeras pacificum
  • † Metaplacenticeras transitionale
• † 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
  • † Metatirolites foliaceus
  • † Metatirolites quadrangulus
  • † Metatirolites subpygmaeus
• † Microsciadiocapsa
  • † Microsciadiocapsa sutterensis
• † Microtropites
  • † Microtropites tubercularis
• † Millerocaulis
  • † Millerocaulis embreei – type locality for species
• † Minasteria – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Minasteria shastensis
• † Minocapsa
  • † Minocapsa aitai
  • † Minocapsa tansinhoki
• † Minytropis
  • † Minytropis melilota
• † Mirifusus
  • † Mirifusus baileyi
  • † Mirifusus chenodes – or unidentified related form
  • † Mirifusus fragilis
  • † Mirifusus guadalupensis
  • † Mirifusus mediodilatatus
• † Mita – tentative report
• † Mita
  • † Mita magnifica
• † Modiolus
  • † Modiolus cylindricus
  • † Modiolus sikiyouensis
  • † Modiolus siskiyouensis
• † Mojsvaroceras
  • † Mojsvaroceras turneri – type locality for species
• † Monotis
  • † Monotis subcircularis
• † Morenosaurus – type locality for genus
  • † Morenosaurus stocki – type locality for species

• 

  Fossilized shell of the Early Cretaceous ammonoid cephalopod Mortoniceras

  † Mortoniceras
  • † Mortoniceras chicoense
  • † Mortoniceras gainesana
  • † Mortoniceras inflata
  • † Mortoniceras kiliani
  • † Mortoniceras tehamaensis
• † 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
  • † Myoconcha nana

• 

  Fossilized shell of the Jurassic-Cretaceous marine bivalve Myophorella

  † 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
  • † Mytilus pauperculus – or unidentified comparable form
  • † Mytilus quadratus
  • † Mytilus ursensis – type locality for species

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
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• M
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• X
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• † Nanonavis
  • † Nanonavis breweriana
• 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
  • † Natica allisoni
  • † Natica conradiana
• † Navahopus

• 

  Life restoration of the Late Triassic thalattosaurs Nectosaurus (right) and Thalattosaurus

  † Nectosaurus
• † Neithea
  • † Neithea grandicosta
• † Nelltia
  • † Nelltia roddana – tentative report
  • † Nelltia salsa – type locality for species
• † Nemodon
• † Neocardioceras – tentative report
• † Neohibolites
  • † Neohibolites fontinalis
• † Neoparonaella
  • † Neoparonaella delicata
• † Neophylloceras
  • † Neophylloceras hetonaiense
  • † Neophylloceras ramosum
  • † Neophylloceras vaculae
• † Neopopanoceras
  • † Neopopanoceras haugi – type locality for species
• † Neopuzosia
  • † Neopuzosia ishikawai

• 

  Fossilized shell of the Jurassic-Cretaceous sea snail Nerinea

  † Nerinea
  • † Nerinea stewarti – type locality for species
• † Nerinella
  • † Nerinella santana – type locality for species
• Nerita
  • † Nerita orovillensis – tentative report
• Nodosarella
• Nodosaria
  • † Nodosaria monile
  • † Nodosaria pomuligera
  • † Nodosaria spinifera
• † Nolita
  • † Nolita ramosa
• † Nonactaeonina
  • † Nonactaeonina obesa
  • † Nonactaeonina tensa – or unidentified comparable form

• 

  Restoration of several species of the Late Cretaceous ammonoid cephalopod Nostoceras

  † Nostoceras
  • † Nostoceras excelsus – type locality for species
  • † Nostoceras splendidum
• † Notidanodon
  • † Notidanodon lanceolatus
• † Notodonax
  • † Notodonax bolsae
• † Novitripus
  • † Novitripus placitus
  • † Novitripus varius
• † Novixitus
  • † Novixitus jurassicus
  • † Novixitus mclaughlini
• † 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
  • † Nucleolites mercedensis

• 

  Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula

  Nucula
  • † Nucula gabbi
  • † Nucula storrsi
• Nuculana
  • † Nuculana grandensis – or unidentified related form
  • † Nuculana translucida
• † Nudivagus – tentative report
  • † Nudivagus califus – type locality for species

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
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• R
• S
• T
• U
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• W
• X
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• Z

• † Obesacapsula
  • † Obesacapsula cetia
  • † Obesacapsula morroensis
  • † Obesacapsula rotunda
• † Obnixia – type locality for genus
  • † Obnixia thaynesiana
• † Octopodichnus
• † Olanda
  • † Olanda olorina
• † Omphaloptycha
  • † Omphaloptycha obesa – type locality for species
  • † Omphaloptycha shastensis – type locality for species
• Opalia
• † Ophiceras
  • † Ophiceras involutum
• † 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
  • † Orbiculiforma maxima
  • † Orbiculiforma multangula
  • † Orbiculiforma nevadaensis
  • † Orbiculiforma railensis
• † Orbiculiformella
  • † Orbiculiformella teres
• † 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
  • † Ostrea crescentica
• † Owenites
  • † Owenites carpenteri
  • † Owenites koeneni – type locality for species
• † Oxybeloceras
  • † Oxybeloceras petrolense
  • † Oxybeloceras taffi – type locality for species
• † Oxyeurax
  • † Oxyeurax trapezoidalis
• † Oxynautilus
  • † Oxynautilus acutus
• † Oxytoma
• † Oxytropidoceras
  • † Oxytropidoceras peruvianum

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
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• R
• S
• T
• U
• V
• W
• X
• Y
• Z

• † Pachecocrinus
• † Pachydesmoceras
  • † Pachydesmoceras colusaense
  • † Pachydesmoceras pachydiscoide – type locality for species

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Pachydiscus

  † 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
  • † Pachyoncus kamiasoensis
• † Paladmete – tentative report
• † Palaeastraea – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Palaeastraea grandissima
• † Palaeobates
  • † Palaeobates shastensis – type locality for species
• † Palaeocypraea
  • † Palaeocypraea fontana – type locality for species
  • † Palaeocypraea wilfredi – type locality for species
• † Palaeomoera
  • † Palaeomoera dyskritos
• † Paleopsephaea
  • † Paleopsephaea sacramentica
• † Paleotractus
  • † Paleotractus crassus
• † Palinandromeda
  • † Palinandromeda fimbria
  • † Palinandromeda podbielensis
• 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
  • † Parallelodon brewerianus
  • † Parallelodon vancouverensis
• † 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
  • † 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
  • † Paratropites colei
  • † Paratropites shastensis
• † Parisculites
  • † Parisculites obolinus
• † 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
  • † Parvivacca coraforma
  • † Parvivacca immodica
  • † Parvivacca marina
  • † Parvivacca robusta
  • † Parvivacca simplex
  • † Parvivacca varica
• † 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
  • † Paxitropis dicriota

• 

  Shells of Pecten scallops

  † Pecten
  • † 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
  • † Pentzia hilgardi
• 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
  • † Peroniceras leei – or unidentified related form
  • † Peroniceras shastensis
• † Pervinquieria
  • † Pervinquieria furberi – type locality for species
  • † Pervinquieria gainesana – type locality for species
• † Petasiforma
  • † Petasiforma foremanae
  • † Petasiforma inusitata
• Phanerolepida
  • † Phanerolepida onoensis – type locality for species
• † Phantum
  • † Phantum insperatum – or unidentified comparable form
• Pharella
  • † Pharella alta
• † Phelopteria
• † Phillippiella
• Pholadomya
  • † Pholadomya diegoensis – or unidentified comparable form
  • † Pholadomya subelongata

• 

  Life restoration of the Early Jurassic-Late Cretaceous ammonoid cephalopod Phylloceras

  † Phylloceras
  • † Phylloceras gargantuum – type locality for species
  • † Phylloceras pachecoense – type locality for species
  • † Phylloceras velledae
• † Phyllopachyceras
  • † Phyllopachyceras aldersona
• † Piarorhynchia
  • † Piarorhynchia howardi – type locality for species
  • † Piarorhynchia winnemae – type locality for species
• † Piestochilus – tentative report
• † Pinacoceras
  • † Pinacoceras rex
• † Pinna
  • † Pinna calamitoides
  • † Pinna expansa – or unidentified comparable form
• † Pityostrobus
  • † Pityostrobus calforniensis – type locality for species
• † Plesiotylosaurus
  • † Plesiotylosaurus crassidens
• † Pleuromya
• † Pleurotropites
  • † Pleurotropites gabbi – type locality for species
  • † Pleurotropites gracilis – type locality for species
• Plicatula
  • † Plicatula perimbricata
  • † Plicatula variata

• 

  Mounted fossilized skeleton of the Late Cretaceous mosasaur Plotosaurus

  † Plotosaurus
  • † Plotosaurus bennisoni
  • † Plotosaurus tuckeri
• † Podobursa
  • † Podobursa basilica
  • † Podobursa helvetica
  • † Podobursa lanza
  • † Podobursa rosea
  • † Podobursa spinellifera
  • † Podobursa spinosa
  • † Podobursa tamanensis
  • † Podobursa triacantha
• † Podocapsa
  • † Podocapsa amphitreptera
• Polinices
  • † Polinices mercedensis – type locality for species
  • † Polinices shumardianus – tentative report
• † Polycyclus
  • † Polycyclus henseli
• † Polyptychites
  • † Polyptychites trichotomus

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Polyptychoceras

  † 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
  • † Praeconosphaera spinosa
• † 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
  • † Praewilliriedellum cephalospinosum
• † Preflorianites
  • † Preflorianites strongi – type locality for species
  • † Preflorianites toulai
• † Prionocycloceras
  • † Prionocycloceras californicum
  • † Prionocycloceras crenulatum
• † Prionolobus
  • † Prionolobus waageni – type locality for species
• † Prionotropis
  • † Prionotropis casperi
  • † Prionotropis hiltensis – type locality for species
• † Priscoficus – tentative report
• † Prisconatica
  • † Prisconatica hesperia
• † 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
  • † 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
  • † Protexanites thompsoni
• † Protocardia
  • † Protocardia remondianum
  • † Protocardia translucidum
• † Protovallupus
  • † Protovallupus tetlamaensis

• 

  Fossilized shell of the Triassic ammonoid cephalopod Protrachyceras

  † Protrachyceras
  • † Protrachyceras storrsi – type locality for species
• † Protunuma
  • † Protunuma japonicus
  • † Protunuma multicostatus – or unidentified related form
• † Pseudacrochordiceras
  • † Pseudacrochordiceras inyoense – type locality for species
• † Pseudanchura
  • † Pseudanchura biangulata
• † Pseudhelicoceras
  • † Pseudhelicoceras petersoni – type locality for species
• † Pseudocrucella
  • † Pseudocrucella ehrenbergi
• † Pseudocymia – type locality for genus
  • † Pseudocymia aitha – type locality for species
  • † Pseudocymia aurora – type locality for species
  • † Pseudocymia cahalli – type locality for species
• † Pseudodiadema
  • † Pseudodiadema emersoni
• † Pseudodictyomitra
  • † Pseudodictyomitra lodogaensis
  • † Pseudodictyomitra pentacolaensis
  • † Pseudodictyomitra pseudomacrocephala
  • † Pseudodictyomitra vestalensis
• † Pseudoeucyrtis
  • † Pseudoeucyrtis firmus
  • † Pseudoeucyrtis hannai – or unidentified comparable form
  • † Pseudoeucyrtis paskentaensis
• † Pseudogaleodea
• † Pseudoheliodiscus

• 

  Fossilized shell of a Pseudomelania sea snail

  † Pseudomelania
  • † Pseudomelania colusaensis – type locality for species
• † Pseudoperna
  • † Pseudoperna toxidonta
• † Pseudophyllites
• † Pseudoptera – tentative report
• † Pseudoristola
  • † Pseudoristola clava
  • † Pseudoristola nova
• † Pseudosageceras
  • † Pseudosageceras multilobatum
• † Pseudothurmannia – tentative report
  • † Pseudothurmannia jupiter
  • † Pseudothurmannia russelli
• † 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
  • † 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

  Pycnodonte
• † Pyktes
  • † Pyktes hamulus
• † Pyramispongia
  • † Pyramispongia glascockensis
• † Pyropsis

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
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• T
• U
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• W
• X
• Y
• Z

• Quadrans – tentative report
• † Quinquecapsularia
  • † Quinquecapsularia spinosa

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
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• O
• P
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• W
• X
• Y
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• † Radioceras
  • † Radioceras evolvens
• † Remondia
  • † Remondia oregonensis – type locality for species
• † Reptolunulites
• Retusa
• † Rhabdoceras
  • † Rhabdoceras suessi
• † Rhactorhynchia
  • † Rhactorhynchia trigona – type locality for species
• † Rhaetina – tentative report
  • † Rhaetina pyriformis
• † Rhectomax
  • † Rhectomax undulatus
• † Rhectomyax
  • † Rhectomyax undulatus

• 

  Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella

  † Rhynchonella
  • † Rhynchonella richardsoni – type locality for species
  • † Rhynchonella varians – or unidentified comparable form
• † Riedelius
• † Ristola
  • † Ristola altissima
  • † Ristola bala
  • † Ristola procera
  • † Ristola turpicula
• Robulus
  • † Robulus inornatus
• Rogerella
• † Romaniceras
  • † Romaniceras deverioide

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Contents

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
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• P
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• † Sagenites
  • † Sagenites dickersoni – type locality for species
• † Saghalinites
• † Sandlingites
  • † Sandlingites andersoni – type locality for species
  • † Sandlingites oribasus
• † Sarasinella
  • † Sarasinella angulata
• † Saturniforma
  • † Saturniforma peregrina
• † Scalarites

• 

  Restoration of several of the Early Cretaceous-Miocene shark Scapanorhynchus

  † Scapanorhynchus
• Scaphander
  • † Scaphander costatus
• † Scaphites
  • † Scaphites hippocrepis – or unidentified related form
  • † Scaphites inermis – or unidentified related form
  • † Scaphites pittensis – type locality for species
• † Scaphotrigonia
  • † Scaphotrigonia naviformis
• † Sciponoceras
  • † Sciponoceras gracile – type locality for species
• Scobinella
  • † Scobinella dilleri
• † Semihsuum
  • † Semihsuum biscuithillense
  • † Semihsuum brokencotense
  • † Semihsuum inexploratum
  • † Semihsuum sourdoughense
• † Senis
• Septifer
• † Sequoia
  • † Sequoia reichenbachi
• Serpula

• 

  Life restoration of three species of the Middle-Late Triassic ichthyosaur genus Shastasaurus

  † Shastasaurus
  • † Shastasaurus alexandrae
  • † Shastasaurus pacificus
• † 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
  • † Silberlingia sanctaeanae
• † Simbirskites
  • † Simbirskites broadi
  • † Simbirskites lecontei
• Siphonalia
  • † Siphonalia dubius
• † Sirenites
  • † Sirenites lawsoni – type locality for species
• † Skolithos
• Solariella
  • † Solariella occidentalis
  • † Solariella stewarti
• 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
  • † Spondylospira lewesensis
  • † Spondylospira parmata
• Spondylus
  • † Spondylus subnodosus
• † Spongiomorpha
  • † Spongiomorpha tenuis
• † Spongocapsula
  • † Spongocapsula dumitricai
  • † Spongocapsula hooveri
  • † Spongocapsula palmerae
  • † Spongocapsula zamoraensis
• † Spongosaturninus
  • † Spongosaturninus bispinus

• 

  Life restoration of the Late Cretaceous shark Squalicorax

  Squalicorax
• † Staurolonche
• Stichocapsa
  • † Stichocapsa convexa
  • † Stichocapsa japonica
• Stichomitra – tentative report
  • † Stichomitra takanoensis
• † Stoliczkaia
  • † Stoliczkaia praecursor – type locality for species
• † Stomechinus
  • † Stomechinus hyatti
• † Striatojaponocapsa
  • † Striatojaponocapsa conexa
  • † Striatojaponocapsa plicarum
• † Stromatomorpha
  • † Stromatomorpha californica – type locality for species
• † Sturia
  • † Sturia woodini
• † Subhungarites
  • † Subhungarites yatesi – type locality for species
• † Submeekoceras
  • † Submeekoceras mushbachanum
• † 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
  • † Suna ehrenbergi
  • † Suna haeckeli
  • † Suna harperi
• † Sympolycyclus
  • † Sympolycyclus kellyi – type locality for species
  • † Sympolycyclus nodifer – type locality for species
• † Syncyclonema
  • † Syncyclonema latum – type locality for species
  • † Syncyclonema operculiformis

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• † Tappanella
  • † Tappanella novacubica
• † Tardeceras – type locality for genus
  • † Tardeceras parvum – type locality for species
• † Tegula
  • † Tegula jeanae
• † Tehamatea
  • † Tehamatea ovalis
• † Teichertus
  • † Teichertus cavernosus
  • † Teichertus notus

• 

  Shell of a Tellina , or tellin

  Tellina
  • † Tellina – type locality for species A – informal
  • † Tellina alisoensis
  • † Tellina ashburnerii
  • † Tellina ooides
  • † Tellina paralis
  • † Tellina quadrata
  • † Tellina whitneyi
• † Tenea
  • † Tenea inflata
• † Teneposita – type locality for genus
  • † Teneposita laeva – type locality for species

• 

  A living Terebralia horn sea snail

  Terebralia – tentative report
  • † Terebralia juliana
• Terebratella
  • † Terebratella densleonis
• Terebratulina
  • † Terebratulina indomita – type locality for species
• † Tessarolax
  • † Tessarolax distorta
  • † Tessarolax trinalis
• † Tethysetta
  • † Tethysetta boesii
• † Tetracapsa
  • † Tetracapsa horokanaiensis
• † Tetraditryma
  • † Tetraditryma coldspringensis
  • † Tetraditryma corralitosensis
  • † Tetraditryma oregonensis
  • † Tetraditryma praeplena
  • † Tetraditryma pseudoplena
• † Tetragonites
  • † Tetragonites cala
  • † Tetragonites epigonum
  • † Tetragonites glabrus – or unidentified comparable form
  • † Tetragonites popetensis – type locality for species
• † Tetrahoplitoides
  • † Tetrahoplitoides stantoni

• 

  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

  † Thalattosaurus
• † Thanarla
  • † Thanarla brouweri
  • † Thanarla elegantissima
  • † Thanarla praeveneta
  • † Thanarla veneta
• † Thetironia
  • † Thetironia annulata
• † Thisbites
  • † Thisbites uhligi
• † Thurmanniceras
  • † Thurmanniceras californicum
  • † Thurmanniceras jenkinsi
  • † Thurmanniceras stippi
• Thyasira
  • † Thyasira cretacea
• † Tibetothyris – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Tibetothyris julica
• † Tibiaporrhais – tentative report
• † Tollia
  • † Tollia giganteus
• † Tornatellaea
  • † Tornatellaea impressa
• † Tornquistites – type locality for genus
  • † Tornquistites evolutus – type locality for species
• † Trachybaculites
  • † Trachybaculites columna
• † Trachysagenites
  • † Trachysagenites erinaceus
  • † Trachysagenites herbichi
  • † Trachysagenites shastensis – type locality for species
• † Trachystenoceras
  • † Trachystenoceras gabbi – type locality for species
• † Tragodesmoceras
  • † Tragodesmoceras ashlandicum
• † Trajanella
  • † Trajanella californica
• † Transhsuum
  • † Transhsuum brevicostatum
• † 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
  • † Triactoma blakei
  • † Triactoma jonesi
  • † Triactoma kellumi
  • † Triactoma longoriai
• † 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
  • † 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
  • † Trigonocallista bowersiana
  • † Trigonocallista nitida
  • † Trigonocallista varians
• † Trillus
  • † Trillus elkhornensis
  • † Trillus seiderense – or unidentified comparable form
• † Trinacria
  • † Trinacria cor
• † Tripocyclia
  • † Tripocyclia brooksi
  • † Tripocyclia foremanae
  • † Tripocyclia frenchflatensis
  • † Tripocyclia highdomensis
  • † Tripocyclia mascula
  • † Tripocyclia saleebyi
• † Tritrabs
  • † Tritrabs casmaliaensis
  • † Tritrabs ewingi
  • † Tritrabs exotica
  • † Tritrabs hayi
  • † Tritrabs rhododactylus
  • † Tritrabs suavia
  • † Tritrabs worzeli
• † Triversus
  • † Triversus fastigatus

• 

  Fossilized shell in multiple views of the Early-Late Cretaceous sea snail Trochactaeon

  † Trochactaeon
  • † Trochactaeon frazierensis
  • † Trochactaeon packardi
• Trochocyathus
  • † Trochocyathus pergranulatus – type locality for species
• Trophon
  • † Trophon condoni
• † Tropiceltites
  • † Tropiceltites caducus
• † 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
  • † 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

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• † Unuma
  • † Unuma echinatus
  • † Unuma gordus
  • † Unuma typicus

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• † Vallupus
  • † Vallupus hopsoni
• † Vaugonia
  • † Vaugonia kobayashii – or unidentified comparable form
  • † Vaugonia obliqua
  • † Vaugonia yukonensis – tentative report
• † Vitorfus
  • † Vitorfus campbelli
• Volsella
  • † Volsella siskiyouensis
• † Volutoderma
  • † Volutoderma averilli
  • † Volutoderma averillii
  • † Volutoderma californica
  • † Volutoderma dilleri
  • † Volutoderma gabbi
  • † Volutoderma jacksonensis
  • † Volutoderma magna
  • † Volutoderma santana

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• † Wilbertopora
  • † Wilbertopora sannerae – type locality for species
• † Willimactra
  • † Willimactra mathewsonii
  • † Willimactra popenoei
  • † Willimactra putida
  • † Willimactra truncata
• † Williriedellum
  • † Williriedellum carpathicum
  • † Williriedellum frequens
  • † Williriedellum madstonense
• † Wilvemia
  • † Wilvemia whiskeyensis
• † Worthenia
  • † Worthenia klamathensis – type locality for species
• † Wrangellium
• † Wyomingites
  • † Wyomingites aplanatus

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• † Xiphostylus
  • † Xiphostylus gasquetensis
  • † Xiphostylus humboldtensis
• † Xitus
  • † Xitus antelopensis
  • † Xitus antiquus
  • † Xitus plenus
  • † Xitus pulcher
  • † Xitus singularis
  • † Xitus spicularius
  • † Xitus spineus

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• † Yaadia
  • † Yaadia branii – or unidentified comparable form
  • † Yaadia hemphilli
  • † Yaadia robusta
  • † Yaadia tryoniana
• † Yezoites
  • † Yezoites puerculus – or unidentified comparable form
• Yoldia
  • † Yoldia diminutiva
  • † Yoldia leana
  • † Yoldia nasuta

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• † Zanola
  • † Zanola cornuta – or unidentified comparable form
• † Zartus
• † Zealandites
• † Zhamoidellum
  • † Zhamoidellum exquisita
  • † Zhamoidellum kiesslingi
  • † Zhamoidellum kozuri
  • † Zhamoidellum parva
  • † Zhamoidellum triangulosa
• † Zifondium
  • † Zifondium lassenensis
  • † Zifondium paupera
• † Zimmerella – type locality for genus
  • † Zimmerella eastoni
• † Zinsitys – tentative report
• † Zugmayerella
  • † Zugmayerella americana
• † Zugmeyeria

References

1. 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.