Xinjiangchelyidae is an extinct family of turtles known from the Lower Jurassic to the Middle Cretaceous of Asia and western Europe. They have generally been interpreted as either being basal cryptodires or placed outside of crown Testudines.
Genera Annemys Itat Formation, Russia, Middle Jurassic (Bathonian) Qigu Formation, Shishugou Formation, China, Late Jurassic (Oxfordian) Ulan Malgait Formation, Mongolia, Late Jurassic (Tithonian) Brodiechelys Vectis Formation, United Kingdom, Early Cretaceous (Barremian) Arcillas de Morella Formation, Spain, Early Cretaceous (Aptian) CamerochelysA. Pérez-García; F.-R. Sáez-Benito; X. Murelaga (2017). "New information on the anatomy and systematics of the Spanish Lower Cretaceous Camerochelys vilanovai (Testudines, Pan-Cryptodira)". Journal of Iberian Geology. in press. doi:10.1007/s41513-017-0014-6. Enciso Group, Spain, Early Cretaceous (Barremian-Aptian) Jastmelchyi KalasinemysHaiyan Tong, Wilailuck Naksri, Eric Buffetaut, Suravech Suteethorn, Varavudh Suteethorn, Phornphen Chantasit and Julien Claude. 2019. Kalasinemys, A New Xinjiangchelyid Turtle from the Late Jurassic of NE Thailand. Geological Magazine. 156(1); 1645-1656. DOI: 10.1017/S0016756818000791 Phu Kradung Formation, Thailand, Tithonian Larachelus Pinilla de los Moros Formation, Spain, Early Cretaceous (Hauterivian-Barrmeian) Phunoichelys Phu Kradung Formation, Thailand, Tithonian Shartegemys Ulan Malgait Formation, Mongolia, Late Jurassic (Tithonian) Tienfuchelys Shaximiao Formation, China, Middle-Upper Jurassic Undjulemys Onjüül locality, Mongolia, Late Jurassic Xinjiangchelys Middle Jurassic-Early Cretaceous, Asia ProtoxinjiangchelysH. Tong, I. Danilov, Y. Ye, H. Ouyang, and G. Peng. 2012. Middle Jurassic turtles from the Sichuan Basin, China: a review. Geological Magazine 149(4):675-695H. -K. Yeh. 1990. Fossil turtles from Dashanpu, Zigong, Sichuan. Vertebrata PalAsiatica 28(4):305-311 Xintiangou Formation, China, Lower-Middle Jurassic
Phylogeny Cladogram of Perichelydia after Miller et al. 2023, showing the two proposed positions of Xinjiangchelyidae.
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