New Turtles from the Paleogene of North America

Chapter
Part of the Vertebrate Paleobiology and Paleoanthropology book series (VERT)

Abstract

Formal names, diagnoses, and descriptions are supplied for previously identified, but informally named, cryptodiran turtles from the Paleogene of Montana and Wyoming, USA. Two new early Paleocene (Puercan) turtles are described from Montana: a peculiar trionychid, Atoposemys entopteros gen. et. sp. nov., from the Tullock Member of the Fort Union Formation, and a chelydrid, Tullochelysmontanus gen. et. sp. nov., from both the Tullock Member of the Fort Union Formation and the Hell Creek Formation. From the Wasatchian (early Eocene) Wasatch and Willwood formations of Wyoming, the following taxa are described: the earliest North American emydid, Psilosemys wyomingensis gen. et. sp. nov.; a platysternid, Cardichelyon rogerwoodi gen. et. sp. nov.; and Planetochelysdithyros sp. nov. A new family, Planetochelyidae, within the Trionychoidae, is erected for Planetochelys.

Keywords

Emydidae Fort Union Formation  Planetochelyidae Platysternidae  Tullock Member Wasatch Formation  Willwood Formation 

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Museum of PaleontologyUniversity of California BerkeleyBerkeleyUSA

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