page_title: List of the Paleozoic life of Utah
section_title: R
hierarchical_section_title: List of the Paleozoic life of Utah / R
caption_attribution_description: English: crop of file in file name
context_page_description: This list of the Paleozoic life of Utah contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Utah and are between 541 and 252.17 million years of age.
context_section_description: †Ramiporalia
  †Raphistoma – tentative report
  †Raphistomina
  †Ratcliffespongia – type locality for genus
  †Ratcliffespongia perforata – type locality for species
  †Ratcliffespongia sheeleri
  †Ratcliffespongia wheeleri – type locality for species
  †Rayonnoceras
  †Rayonnoceras solidiorme
    †Receptaculites
  †Receptaculites elongatus
  †Receptaculites mammilaris
  †Receptaculites mammillaris
  †Rectifenestella
  †Rectifenestella tenax
  †Regispongia
  †Regispongia contorta
  †Remopleuridiella
  †Remopleuridiella angularis – type locality for species
  †Remopleuridiella caudalimbata
  †Reticulatia
  †Reticulatia americana
  †Retispira
  †Retispira cincta – type locality for species
  †Retispira textilis – or unidentified comparable form
  †Rhabdomeson
  †Rhabdomeson artum
  †Rhipidomella
  †Rhipidomella missouriensis
   †Rhodea
  †Rhodea vespertina
  †Rhombopora
  †Rhombopora tenuirama
  †Rhynchopora
  †Ribeiria
  †Ribeiria lucan
  †Rigbyocarpus – type locality for genus
  †Rigbyocarpus ebracteatus – type locality for species
  †Rodea
  †Rodea vespertina – or unidentified comparable form
  †Rossaspis
  †Rossaspis superciliosa
  †Rossicurus
  †Rossicurus lepidus
  †Rugatia
  †Rugatia occidentalis
  †Rugosochonetes
  †Rugosochonetes loganensis
   †Rusophycus
  †Rylstonia – tentative report
caption: Shell of a Rhodea land snail
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