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Diversity of late Neogene Monachinae (Carnivora, Phocidae) from the North Atlantic, with the description of two new species. | LitMetric

AI Article Synopsis

  • * The study emphasizes the importance of using almost complete humeri as type specimens for fossil Monachinae and questions the validity of using partial humeri or other bone types.
  • * Two new genera of late Miocene and Pliocene Monachinae are described from North America, indicating a lower level of faunal interchange between the east and west coasts of the North Atlantic than previously thought.

Article Abstract

While the diversity of 'southern seals', or Monachinae, in the North Atlantic realm is currently limited to the Mediterranean monk seal, , their diversity was much higher during the late Miocene and Pliocene. Although the fossil record of Monachinae from the North Atlantic is mainly composed of isolated specimens, many taxa have been erected on the basis of fragmentary and incomparable specimens. The humerus is commonly considered the most diagnostic postcranial bone. The research presented in this study limits the selection of type specimens for different fossil Monachinae to humeri and questions fossil taxa that have other types of bones as type specimens, such as for . In addition, it is essential that the humeri selected as type specimens are (almost) complete. This questions the validity of partial humeri selected as type specimens, such as for . This study revises , and , all purportedly known from the Lee Creek Mine, Aurora, North Carolina, in addition to their respective type localities in Belgium, South Africa and Italy, respectively. is retained as a monachine seal taxon that lived both on the east coast of North America and in the North Sea Basin. However, from North America cannot be identified beyond the genus level, and specimens previously assigned to from North America clearly belong to different taxa. Indeed, we also present new material and describe two new genera of late Miocene and Pliocene Monachinae from the east coast of North America: nov. gen. et nov. sp., and nov. gen. et nov. sp. This suggests less faunal interchange of late Neogene Monachinae between the east and west coasts of the North Atlantic than previously expected.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5882749PMC
http://dx.doi.org/10.1098/rsos.172437DOI Listing

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