Sinemydidae

Sinemydidae Temporal range: Oxfordian–Santonian PreꞒ Ꞓ O S D C P T J K Pg N
Jeholochelys
Ordosemys
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Pantestudines
Clade:	Testudinata
Clade:	Perichelydia
Family:	† Sinemydidae Yeh, 1963
Genera
See text

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.

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]

References

1. 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.
2. "Sinemydidae". Fossilworks. Retrieved 17 December 2021.
3. Gentry, Andrew D.; Kiernan, Caitlín R.; Parham, James F. (June 2023). "A large non-marine turtle from the Upper Cretaceous of Alabama and a review of North American "Macrobaenids"". The Anatomical Record. 306 (6): 1411–1430. doi:10.1002/ar.25054. ISSN   1932-8486. PMID   37158131.

External links

• "Chelonii: Centrocryptodira". palaeos.com. Archived from the original on April 5, 2023.