Articles | Volume 20, issue 1
Foss. Rec., 20, 69–85, 2017
https://doi.org/10.5194/fr-20-69-2017
Foss. Rec., 20, 69–85, 2017
https://doi.org/10.5194/fr-20-69-2017
Research article
03 Feb 2017
Research article | 03 Feb 2017

Turtle shell bone and osteoderm histology of Mesozoic and Cenozoic stem-trionychian Adocidae and Nanhsiungchelyidae (Cryptodira: Adocusia) from Central Asia, Mongolia, and North America

Torsten M. Scheyer et al.

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Short summary
We review shell bone microstructures of Adocidae and Nanhsiungchelyidae, two groups of extinct hide-necked turtles related to modern soft-shelled turtles (Trionychidae) and the pig-nosed turtle Carettochelys insculpta (Carettochelyidae). Adocids and nanhsiungchelyids both have a good fossil record in North America and Asia during the Cretaceous and Cenozoic. Our microstructural data supplement previously reported differences in external shell morphology between adocids and nanhsiungchelyids.