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Sinemydidae

Extinct family of turtles From Wikipedia, the free encyclopedia

Sinemydidae
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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.

Quick Facts Scientific classification, Genera ...
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Genera

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  • 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]

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References

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