page_title: List of the Cenozoic life of California
section_title: O
hierarchical_section_title: List of the Cenozoic life of California / O
caption_attribution_description: English: Oenopota tabulata (Carpenter, 1864); family Mangeliidae
context_page_description: This list of the Cenozoic 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 66 million and 10,000 years of age.
context_section_description: †Ocajila – or unidentified comparable form
  Oceanodroma
   †Oceanodroma furcata
  †Oceanodroma homochroa
  †Oceanodroma hubbsi – type locality for species
  †Ocenbra
  †Ocenbra topangensis – or unidentified comparable form
  Ocenebra
  †Ocenebra barbarensis – or unidentified comparable form
  †Ocenebra circumtexta
  †Ocenebra foveolata
  †Ocenebra interfossa
  †Ocenebra lurida
  †Ocenebra poulsoni
  †Ocenebra tenuisculpta
  †Ocenebra topangensis
  Ocotea
  †Ocotea ovoidea
  †Ocotea perseaformis
  †Ocystias
  †Ocystias sagitta
  †Odaxosaurus
  Odobenus
   †Odobenus rosmarus
  Odocoileus
  †Odocoileus hemionus
  †Odocoileus virginianus – or unidentified comparable form
  Odontaspis
  †Odontaspis ferox
  †Odontogryphaea – tentative report
  †Odontogryphaea haleyi
  Odostomia
  †Odostomia avellana
  †Odostomia beringi – or unidentified comparable form
  †Odostomia californica – or unidentified comparable form
  †Odostomia callimene – or unidentified related form
  †Odostomia columbiana – or unidentified comparable form
  †Odostomia diaboli
   †Odostomia donilla
  †Odostomia eugena
  †Odostomia farallonensis
  †Odostomia fetella
  †Odostomia gravida
  †Odostomia helena
  †Odostomia minutissima – or unidentified comparable form
  †Odostomia nemo
  †Odostomia nota
  †Odostomia stephensae
  †Odostomia tacomoensis
  †Odostomia tenuisculpta – or unidentified comparable form
  †Oedolithax – type locality for genus
  †Oedolithax mira – type locality for species
  Oenopota
  †Oenopota fidicula
   †Oenopota tabulata
  Ogmodontomys
  †Ogmodontomys sawrockensis
  †Olequahia
  †Olequahia domenginica
  †Olequahia lorenzana
  †Oligoryctes
  Oliva
  †Oliva californica
  †Oliva meganosensis – type locality for species
  †Oliva spicata
  Olivella
  †Olivella baetica
  †Olivella biplicata
  †Olivella gracilis
  †Olivella mathewsoni
  †Olivella mathewsonii
  †Olivella pedroana
  †Olivella santana – type locality for species
  †Omomys
  †Omomys carteri – or unidentified comparable form
  Oncorhynchus
   †Oncorhynchus rastrosus
  Ondatra
  †Ondatra idahoensis
  †Ondatra minor
  Oneirodes
  Onthophagus
  †Onthophagus everestae – type locality for species
  Onychomys
  †Onychomys gidleyi
  †Onychomys torridus
  Ophiodermella
  †Ophiodermella graciosana
  †Ophiodermella inermis
  †Ophiomys
  †Ophiomys parvus
  †Opisima – tentative report
  †Opisima pacifica – or unidentified comparable form
  †Opisthonema
  †Opisthonema palosverdensis – type locality for species
  Oreamnos
  †Oreamnos americanus
  Oreortyx
  †Oreortyx picta
  Orthemis
  †Orthemis ferruginea
  Orthodon
  †Osbornodon
  †Osbornodon fricki
   †Osteodontornis – type locality for genus
  †Osteodontornis orri – type locality for species
  Ostrea
  †Ostrea angelica
  †Ostrea atwoodii
  †Ostrea bourgeosi
  †Ostrea conchaphila
  †Ostrea hertleini
  †Ostrea lincolnensis – or unidentified related form
  †Ostrea lurida
  †Ostrea subtitan
  †Ostrea weaveri
   †Otodus
  †Otodus angustidens
  †Otodus megalodon
  †Ottoceros
  †Ottoceros peacevalleyensis – type locality for species
  Otus
  †Otus asio
  †Ourayia
  Ovibos
  †Ovibos moschatus
  Ovis
  †Ovis canadensis
  †Oxyrhina
  †Oxyrhina crassa
  †Oxyura
   †Oxyura jamaicensis
  †Ozymandias – type locality for genus
  †Ozymandias gilberti – type locality for species
caption: Illustration of the shell of an Oenopota tabulata sea snail
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