page_title: List of the Paleozoic life of Alaska
section_title: R
hierarchical_section_title: List of the Paleozoic life of Alaska / R
caption_attribution_description: English: Rhynchonella species from Russia.
context_page_description: This list of the Paleozoic life of Alaska contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Alaska and are between 541 and 252.17 million years of age.
context_section_description: †Rachiopteris
  †Raphistoma – tentative report
  †Raphistoma alaskensis – type locality for species
  †Raphistomina
  †Raphistomina rugata – or unidentified comparable form
  †Rastrites
  †Rastrites longispinus – or unidentified comparable form
  †Rastrites peregrinus – or unidentified related form
    †Receptaculites
  †Rectograptus
  †Rectograptus amplexicaulis
  †Remipyga
  †Renalcis
  †Renalcis tuberculatus – or unidentified comparable form
  †Reteograptus
  †Reteograptus geinitzianus
  †Reticularia
  †Reticularia setigera – or unidentified related form
  †Reticulariopsis
  †Reticulariopsis bicollina
  †Retiolites
  †Retiolites geinitzianus
  †Retispira
  †Retispira sullivani
  †Reuschia
  †Rhabdomeson
  †Rhabdostropha
  †Rhabdostropha primitiva
  †Rhaphidophyllum
  †Rhenozyga
  †Rhenozyga reifenstuhli – type locality for species
  †Rhineoderma – tentative report
  †Rhineoderma wortheni – or unidentified related form
  †Rhipidomella
  †Rhipidomella carbonaria – or unidentified related form
  †Rhipidomella nevadensis – or unidentified related form
  †Rhipidomella uralica – or unidentified related form
  †Rhizophyllum
  †Rhizophyllum schischkaticum
  †Rhombopora
   †Rhynchonella
  †Rhynchonella amalthea – or unidentified comparable form
  †Rhynchonella livonica
  †Rhynchopora
  †Rhynchopora beecheri – or unidentified related form
  †Rhynchopora geinitziana – or unidentified related form
  †Rhynchopora kochi – or unidentified comparable form
  †Rhynchopora nikitini – or unidentified related form
  †Rhytiodentalium
  †Rhytiodentalium kentuckyensis – or unidentified comparable form
  †Richardsonella
  †Richthofenia
  †Richthofenia lawrenciana – or unidentified related form
  †Rigbyetia
  †Rigbyetia obconica
  †Roadoceras
  †Roadoceras roadense – or unidentified comparable form
  †Roemeria – or unidentified comparable form
  †Rothpletzella
  †Rothpletzella gotlandica
  †Rousseauspira
  †Rousseauspira teicherti
  †Rugaltarostrum
  †Rugaltarostrum congregabile – type locality for species
  †Rugatia
  †Rugatia occidentalis – or unidentified related form
  †Rugivestis
  †Rugivestis girtyi – type locality for species
  †Rugosatrypa
  †Rugosatrypa flexibilis
caption: Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella
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