page_title: List of the Cenozoic life of California
section_title: R
hierarchical_section_title: List of the Cenozoic life of California / R
caption_attribution_description: English: Photo of dorsal view of a live Retusa sp.
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: Raja
  †Rakomeryx
  †Rakomeryx sinclairi – type locality for species
  Rallus
  †Rallus limicola
   †Ramoceros
  †Ramoceros brevicornis – type locality for species
  †Rana
  †Ranellina
  †Ranellina pilsbry – or unidentified related form
  Raninoides
  †Raninoides slaki – type locality for species
  †Rapamys
  †Rapamys fricki – type locality for species
  Rapana
  †Rapana vaquerosensis
  †Rectoguembelina
  †Rectoguembelina trinitatensis – or unidentified comparable form
   Recurvirostra
  Reithrodontomys
  †Reithroparamys – or unidentified comparable form
  Reophax
  †Reophax pilulifer – or unidentified comparable form
  †Repomys
  †Repomys gustelyi – type locality for species
  †Repomys maxumi – type locality for species
  Reticulitermes
  †Reticulitermes laurae – type locality for species
  †Reticulitermes tibalis
  Reticutriton
  †Reticutriton elsmerensis
  †Retipirula
  †Retipirula crassitesta
   Retusa
  †Retusa carinata
  †Retusa culcitella
  †Retusa harpa
  †Retusa tantilla
  †Reynoldsomys
  †Reynoldsomys timoteoensis – type locality for species
  †Rhabdammina
  †Rhabdammina eocenica
  †Rhamnidium
  †Rhamnidium chaneyi
  †Rhamnus
  †Rhamnus calyptus
  †Rhamnus moragensis
  †Rhamnus plenus
  †Rhamnus precalifornica
  †Rhomarchus – type locality for genus
  †Rhomarchus ensiger – type locality for species
  †Rhomurus
  †Rhomurus fulcratus
  Rhus
  †Rhus diablana
  †Rhus mixta
   †Rhynchotherium
  †Rhynchotherium falconeri
  †Rhynconella – tentative report
  †Rhyssomatus
  †Rhyssomatus miocenae – type locality for species
  †Rhythmias
  †Rhythmias gaviotae – type locality for species
  †Rhythmias slarri
  Rimella
  †Rimella macilentus
  †Rimella supraplicata
  †Rimella supraplicatus
  Rissa
  †Rissa estesi – type locality for species
  †Rissa tridactyla
  Rissoina
  †Rissoina pleistocena
   †Robinia
  †Robinia californica
  Robulus
  †Robulus alatolimbatus
  †Robulus arcuatostriatus
  †Robulus clericii
  †Robulus clypeiformis – or unidentified comparable form
  †Robulus inornatus
  †Robulus insuetus
  †Robulus kincaidi
  †Robulus mayi
  †Robulus mexicanus
  †Robulus nikobarensis
  †Robulus propinquus
  †Robulus simplex
  †Robulus terryi – or unidentified comparable form
  †Robulus warmani
  †Robulus welchi
  †Rogenio
  †Rogenio bowersi
  †Rogenio solitudinis
  †Rogenio vanclevei – type locality for species
  †Rotularia
  †Rotularia tejonense
  †Russellagus
caption: A living Retusa barrel bubble sea snail
exif: {}