Sinemys
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| Sinemys Temporal range: Late Jurassic to Early Cretaceous | |
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| Holotype carapace and plastron (IVPP V9538) of S. brevispinus, Paleozoological Museum of China | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Pantestudines |
| Clade: | Testudinata |
| Family: | †Sinemydidae |
| Genus: | †Sinemys Wiman, 1930 |
| Species | |
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Sinemys is an extinct genus of turtle from the Late Jurassic to Early Cretaceous of China. Three species have been named: S. lens, the type species, from the Kimmeridgian-Tithonian of Shandong; S. gamera (Japanese: シネミス・ガメラ) (named after the movie monster of the same name), from the Valanginian-Albian of Nei Mongol, and S. brevispinus from Early Cretaceous of Nei Mongol.[1] S. wuerhoensis, from the Aptian-Albian of Xinjiang, is not referrable to this genus.[2] Specimen that may be belong to this genus were also known from Japan,[3] although later abstract considered it as indeterminate sinemydid.[4] The species S. gamera is noted for the presence of a pair of elongate spines projecting outwards and backwards from seventh costal of the carapace. These may have served a hydrodynamic function.[5]
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