Abstract

ABSTRACT A mandibular ramus referred to a new amphicyonid species Pliocyon robustus is described from the Bone Valley Formation of Florida. This is the first reported occurrence of Pliocyon from eastern North America. Pliocyon robustus differs from the genotype, Pliocyon medius, in a number of characters that include: larger size, deeper and more robust jaw, extremely reduced P2–3, and P2 larger than P3. The Florida occurrence of Pliocyon indicates the presence of older medial Miocene (either Barstovian or Clarendonian) deposits within the Bone Valley Formation.

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