Sinemydidae is an extinct family of turtles from the Jurassic and Cretaceous of East Asia. Their exact position is engimatic, they have alternatively been considered stem-group cryptodires, but also "crownward stem-turtles" alongside Macrobaenidae, Paracryptodira, Xinjiangchelyidae, Thalassochelydia and Sandownidae outside of crown Testudines.
Genera
- Dracochelys Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- Hongkongochelys Upper Shaximiao Formation, China, Middle-Late Jurassic
- Jeholochelys Jiufotang Formation, China, Early Cretaceous (Aptian)
- Liaochelys Jiufotang Formation, China, Early Cretaceous (Aptian)
- Manchurochelys Yixian Formation, China, Early Cretaceous (Aptian)
- Ordosemys
- O. leios Luohandong Formation, China, Early Cretaceous
- O. liaoxiensis Chengzihe Formation, China, Early Cretaceous (Aptian)
- O. brinkmania Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- O. perforata Khulsangol Formation, Mongolia, Early Cretaceous (Albian)
- O. donghai Chengzihe Formation, China, Early Cretaceous (Aptian-Albian)
- Sinemys
- â Sinemys brevispinus Tong and Brinkman 2012 Laohongdong Formation, China, Early Cretaceous
- â Sinemys chabuensis Ji and Chen 2018 Jingchuan Formation, China, Early Cretaceous (Barremian)
- â Sinemys gamera Brinkman and Peng 1993 Luohandong Formation, China, Early Cretaceous (Valanginian-Hauterivian)
- â Sinemys lens Wiman 1930 Mengyin Formation, China, Early Cretaceous (Berriasian-Valanginian)
- Wuguia
- â Wuguia efremovi Khozatsky 1996 Hutubei Formation, China, Hauterivian/Barremian Lianmuxin Formation, China, Early Cretaceous (Aptian-Albian)
- â Wuguia hutubeiensis Matzke et al. 2004 Hutubei Formation, China, Hauterivian/Barremian
- Xiaochelys Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- Yumenemys Hui-Hui-P'u, China, Late Cretaceous
Material from the Paleocene of California previously attributed to c.f. Sinemyididae is now attributed to macrobaenids.
References
External links