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  1. Oxygyrus - Wikipedia

  2. Oxygyrus - Wikipedia

  3. review of the ecology, palaeontology and distribution of atlantid ...

  4. WoRMS - World Register of Marine Species - Oxygyrus keraudrenii ...

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    However, the relationship between Oxygyrus and B. minuta remains enigmatic [ 22 ], and here we consider B. minuta to belong within the family Atlantidae, having a shell morphology very similar to the extant genus Oxygyrus [ 22 ]. Indeed, the World Register of Marine Species places the genus Bellerophina within the Family Atlantidae.
    The family contains three genera ( Atlanta, Protatlanta and Oxygyrus) and is characterized by dextrally-coiled, aragonitic shells into which the soft body can fully retract, sealed by a chitinous operculum that is attached to the foot (Fig. 1 A, C).
    This species is 75 myr older than any other known atlantid, but resembles the extant Oxygyrus inflatus so strongly that Forbes (1844) erroneously considered the two species to be synonymous. However, the fossil record of O. inflatus is not known to extend beyond the Pliocene ( Janssen, 1998, 2007, 2012b ).
    This species exhibits morphological characters in common with both genera, having larval shell ornamentation similar to Oxygyrus, but an adult shell similar to Protatlanta, and a smooth periphery suggesting a conchiolin keel (common to Oxygyrus and Protatlanta).
  6. Pelagic Molluscs 2.0: Oxygyrus keraudreni

  7. Pelagic Molluscs 2.0: Oxygyrus keraudreni

  8. Atlantidae - Wikipedia

  9. ADW: Oxygyrus: CLASSIFICATION

  10. Fossil-calibrated molecular phylogeny of atlantid …

    WebThe oldest potential member of the family Atlantidae does not appear in the fossil record until ~ 57 Ma later, in the Early Cretaceous. Bellerophina minuta (Sowerby, 1812) [22, 23], found in the Albian (~ 113–100.5 Ma), …

  11. WoRMS - World Register of Marine Species - Atys Montfort, 1810