Extinct family of turtles
Sinemydidae is an extinct family of turtles from the Jurassic and Cretaceous of East Asia. 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.
Material from the Paleocene of California previously attributed to c.f. Sinemyididae is now attributed to macrobaenids.
References.
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