Sinemydidae

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Cladus: Archelosauria
Division: Pan-Testudines
Division: Testudinata
Ordo: Testudines
Subordo: Cryptodira

Superfamily: Macrobaenoidea
Familia: †Sinemydidae
Genera: Changmachelys – Dracochelys – Hongkongochelys – Judithemys – Kirgizemynae – Kirgizemys – Liaochelys – Manchurochelys – Ordosemys – Sinemys – Wuguia – Xiaochelys – Yumenemys
Name

Sinemydidae Yeh 1963
Type genus: Synemys Wiman 1930

References

Turtle Extinctions Working Group (Rhodin, A.G.J., Thomson, S., Georgalis, G., Karl, H.-V., Danilov, I.G., Takahashi, A., de la Fuente, M.S., Bourque, J.R., Delfino, M., Bour, R., Iverson, J.B., Shaffer, H.B., and van Dijk, P.P.). 2015. Turtles and tortoises of the world during the rise and global spread of humanity: first checklist and review of extinct Pleistocene and Holocene chelonians. Chelonian Research Monographs. 5(8):000e.1–66. Download

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.
Genera

• 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

C.-F. Zhou and 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.
"Sinemydidae". Fossilworks. Retrieved 17 December 2021.