Articles | Volume 20, issue 1
Foss. Rec., 20, 69–85, 2017
Foss. Rec., 20, 69–85, 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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Cited articles

Brinkman, D. B. and Nicholls, E. L.: New specimen of Basilemys praeclara Hay and its bearing on the relationships of the Nanhsiungchelyidae (Reptilia: Testudines), J. Paleont., 67, 1027–1031, 1993.
Brinkman, D. B. and Peng, J.-H.: A new species of Zangerlia (Testudines: Nanhsiungchelyidae) from the Upper Cretaceous redbeds at Bayan Mandahu, Inner Mongolia, and the relationships of the genus, Can. J. Earth Sci., 33, 526–540, 1996.
Brinkman, D. B., Tong, H.-Y., Li, H., Sun, Y., Zhang, J.-S., Godefroit, P., and Zhang, Z.-M.: New exceptionally well-preserved specimens of “Zangerlianeimongolensis from Bayan Mandahu, Inner Mongolia, and their taxonomic significance, C.R. Palevol, 14, 577–587,, 2015.
Chkhikvadze, V. M.: Tertiary Turtles of the Zaissan Depression, Metsniereba Publishers, Tbilisi, 100 pp., 1973 (in Russian).
Chkihkvadze, V. M.: Paleogenowyje cerepachi SSSR [Paleogene turtles of the USSR; Neogene Schildkröten der UdSSR], Tiflis (Mezniereba), 96 pp., 1990.
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.