oleronensis named for the skull, but was representative of the same genus. Thalassemys bruntrutana was described in 2015 by Püntener and colleagues for an almost complete carapace and plastron from a lower member of the Reunchenette Formation than other species, with referred material also from the British Kimmeridge Clay of the Isle of Purbeck. While the genus Thalassemys was placed in the family Thalassemydidae, it represents the only definitive member of the family due to the uncertain relationships of other members of Thalassochelydia, primarily due to the lack of cranial material in Thalassemys. References Thalassochelydia Prehistoric turtle genera Kimmeridgian genera Late Jurassic turtles Late Jurassic reptiles of Europe Jurassic England Fossils of England Jurassic Germany Fossils of Germany Jurassic Switzerland Fossils of Switzerland Fossil taxa described in 1873