Sinemydidae is an extinct family of turtles from Cretaceous to Paleocene deposits in Asia and North America.[1][2] 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 | |
| |
| Manchurochelys | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Pantestudines |
| Clade: | Testudinata |
| Clade: | Perichelydia |
| Family: | †Sinemydidae Yeh, 1963 |
| Genera | |
|
See text | |
Genera edit
- Dracochelys[3] Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- Hongkongochelys[3] Upper Shaximiao Formation, China, Middle-Late Jurassic
- Jeholochelys[3] Jiufotang Formation, China, Early Cretaceous (Aptian)
- Liaochelys[1][3] Jiufotang Formation, China, Early Cretaceous (Aptian)
- Manchurochelys[3] Yixian Formation, China, Early Cretaceous (Aptian)
- Ordosemys[3]
- 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[3]
- †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[3]
- †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][3] Lianmugin Formation, China, Early Cretaceous (Aptian-Albian)
- Yumenemys[3] Hui-Hui-P'u, China, Late Cretaceous
References edit
- ^ a b c C.-F. Zhou; M. Rabi (2015). "A sinemydid turtle from the Jehol Biota provides insights into the basal divergence of crown turtles". Scientific Reports. 5: 16299. Bibcode:2015NatSR...516299Z. doi:10.1038/srep16299. PMC 4639786. PMID 26553740.
- ^ "Sinemydidae". Fossilworks. Retrieved 17 December 2021.
- ^ a b c d e f g h i j "Sinemydidae". Fossilworks. Retrieved 17 December 2021.
External links edit
- "Chelonii: Centrocryptodira". palaeos.com. Archived from the original on April 5, 2023.
 | This article about a prehistoric turtle is a stub. You can help Wikipedia by expanding it. |