Sinemydidae
Extinct family of turtles
From Wikipedia, the free encyclopedia
Sinemydidae is an extinct family of turtles from the Jurassic and Cretaceous of East Asia.[1] 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.
| Sinemydidae Temporal range: | |
|---|---|
| |
| Jeholochelys | |
 | |
| Ordosemys | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Pantestudines |
| Clade: | Testudinata |
| Clade: | Perichelydia |
| Family: | †Sinemydidae Yeh, 1963 |
| Genera | |
|
See text | |
Genera
- Dracochelys[2] Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- Hongkongochelys[2] Upper Shaximiao Formation, China, Middle-Late Jurassic
- Jeholochelys[2] Jiufotang Formation, China, Early Cretaceous (Aptian)
- Liaochelys[1][2] Jiufotang Formation, China, Early Cretaceous (Aptian)
- Manchurochelys[2] Yixian Formation, China, Early Cretaceous (Aptian)
- Ordosemys[2]
- 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[2]
- †Sinemys brevispinus Tong and Brinkman 2012 Laohongdong Formation, China, Early Cretaceous
- †Sinemys chabuensis Ji and Chen 2018 Jingchuan Formation, China, Early Cretaceous (Barremian)
- †Sinemys gamera Brinkman and Peng 1993 Luohandong Formation, China, Early Cretaceous (Valanginian-Hauterivian)
- †Sinemys lens Wiman 1930 Mengyin Formation, China, Early Cretaceous (Berriasian-Valanginian)
- Wuguia[2]
- †Wuguia efremovi Khozatsky 1996 Hutubei Formation, China, Hauterivian/Barremian Lianmuxin Formation, China, Early Cretaceous (Aptian-Albian)
- †Wuguia hutubeiensis Matzke et al. 2004 Hutubei Formation, China, Hauterivian/Barremian
- Xiaochelys[1][2] Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- Yumenemys[2] Hui-Hui-P'u, China, Late Cretaceous
Material from the Paleocene of California previously attributed to c.f. Sinemyididae is now attributed to macrobaenids.[3]
