page_title: List of the prehistoric life of California
section_title: Selected Mesozoic taxa of California
hierarchical_section_title: List of the prehistoric life of California / Mesozoic / Selected Mesozoic taxa of California
caption_attribution_description: English: Fossil shells of Propeamussium eocenicum from Syria, on display at Gallery of Paleontology and Comparative Anatomy, Paris.
context_page_description: This list of the prehistoric life of California contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of California.
context_section_description: †Abyssochrysos – tentative report
  †Acanthoceras
  Acanthosphaera – tentative report
  Acesta
  †Acrioceras
  †Acrodus
  †Acrodus wempliae – type locality for species
  †Acteon
  †Acteonella
   †Aletopelta – type locality for genus
  †Aletopelta coombsi – type locality for species
  Amauropsis
  †Ampullina
  †Anagaudryceras
  †Anagaudryceras sacya – or unidentified comparable form
  †Anahamulina
  †Anasibirites
  †Anasibirites kingianus – type locality for species
  †Anatomites
  †Anatropites
  †Anisoceras
   †Anomia
  †Anoplophora – tentative report
  †Aphaea
  †Aphrosaurus
  †Aphrosaurus furlongi
  Aporrhais
  Architectonica – tentative report
  Arctica
  †Arctoceras
  Argyrotheca
  †Arnioceras
  †Arpadites
  Arrhoges
  †Aspenites – type locality for genus
  Astarte
  †Asteroceras
  †Atira
   †Augustynolophus
  †Augustynolophus morrisi
  †Axonoceras
  †Bacchites
  †Baculites
  †Baculites capensis
  †Baculites yokoyamai – or unidentified comparable form
  Barbatia
  †Barrettia
  †Basilemys
  † Belleza
  Bernaya
  †Beudanticeras
  †Bochianites
  †Bostrychoceras
  †Brancoceras
  Bulimulus
  Bullaria
  Bullina
  †Californites – type locality for genus
   †Californosaurus
  Callianassa – tentative report
  †Calliconites
  †Calliomphalus – tentative report
  Callista – tentative report
  †Calva
  †Calycoceras
  Cancellaria – tentative report
  Cantharus
  Capulus – or unidentified comparable form
  Cardinia
  Cardita
  †Cecrops
  Cerithidea
  Cerithium
  †Cidarina
   Cidaris
  †Clinura
  †Collignoniceras
  †Collonia
  Corbicula
  Corbula
  Cornutella
  †Cosmonautilus
  †Crioceratites
  Cucullaea
  †Cunningtoniceras
  †Cyclothyris
  Cylichna
  †Cylindroteuthis
  †Cymatoceras
   †Cymbospondylus
  †Cymbospondylus petrinus
  †Daonella – tentative report
  †Daonella dubia
  †Dentalium
  †Desmoceras
  †Desmophyllites
  †Dictyoconites
  †Didymoceras
  †Didymoceras hornbyense – or unidentified comparable form
  †Dieneria – type locality for genus
  †Discohelix – tentative report
  †Discoscaphites
  †Douvilleiceras
  †Durania
  †Echinocorys
  †Elimia
   †Enchodus
  †Entobia
  †Eriphyla
  †Eucalycoceras
  †Euclastes
  †Euomphaloceras
  †Eupachydiscus
  †Euspira
  †Eutrephoceras
  †Exiteloceras
  †Exogyra
   †Fagesia
  Fissurella – tentative report
  †Flabellina
  †Flabellum
  †Fresnosaurus – type locality for genus
  †Fresnosaurus drescheri – type locality for species
  Gastrochaena – tentative report
  †Gaudryceras
  †Gervillia
  Glans – tentative report
  †Glauconia
  †Globigerinelloides
  Glossus
  Glycymeris
  †Goricanites – type locality for genus
   †Grallator
  †Gryphaea
  †Gryponautilus
  Gyroidina
  Haliotis
  †Hauericeras
  †Hecticoceras
  †Hedenstroemia
  †Helena
  †Hemicidaris
  Heptranchias
  Hipponix
  †Homerites
  †Hybodus
  †Hydrotherosaurus – type locality for genus
  †Hydrotherosaurus alexandrae – type locality for species
  †Hypophylloceras
  †Ichthyornis
  †Ichthyosaurus
   †Inoceramus
  †Inoceramus balticus
  †Inoceramus cordiformis – or unidentified comparable form
  †Inoceramus incertus – or unidentified comparable form
  †Inoceramus naumanni
  †Inoceramus steinmanni – or unidentified comparable form
  †Inoceramus subundatus
  †Inoceramus teshioensis – or unidentified comparable form
  †Inoceramus turgidus – type locality for species
  †Inyoites – type locality for genus
  †Inyoites oweni – type locality for species
  Isognomon
   †Kallirhynchia
  †Kilianella
  †Kossmaticeras
  †Lacunaria
  Leda – tentative report
  Lima
  †Linearis
  †Lingula
  Lithophaga
  Lopha
  †Loxo
  †Lucina
  †Lysis
  †Lytoceras
  †Lytoceras batesi
  Macrocallista
  †Macrocephalites
  †Mammites – tentative report
  †Mantelliceras
  Margarella
  Margarites
   †Mariella
  Martesia
  †Mediaster
  †Meekoceras
  †Meekoceras gracilitatis
  †Melchiorites
  †Menuites
  †Merriamia
  † Mita – tentative report
  † Mita
  †Modiolus
  †Morenosaurus – type locality for genus
  †Morenosaurus stocki – type locality for species
  †Mortoniceras
  Musculus – or unidentified related form
  †Myophorella
  †Myophorella argo
  †Myophorella dawsoni – or unidentified related form
  †Myophorella yellowstonensis
  †Myophoria
  †Mytilus
  Natica
  †Navahopus
   †Nectosaurus
  †Neithea
  †Neocardioceras – tentative report
  †Neohibolites
  †Neophylloceras
  †Neophylloceras hetonaiense
  †Neophylloceras ramosum
  †Nerinea
  Nerita
  †Nolita
  †Nostoceras
  †Nostoceras splendidum
  Nucula
  Opalia
  †Ophiceras
  †Opis
  †Orthoceras
   Ostrea
  †Owenites
  †Owenites carpenteri
  †Owenites koeneni – type locality 
caption: Fossilized shells of the Triassic-modern marine bivalve Propeamussium
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