Sinemydidae

Sinemydidae
Temporal range:
Jeholochelys
Ordosemys
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Pantestudines
Clade: Testudinata
Clade: Perichelydia
Family:
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]
  • 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. ^ 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.
  2. ^ a b c d e f g h i j "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.