Triassic Period, 250-200 million years BP. A complete fossil Keichousaurus hui in a rectangular matrix. 2.9 kg, 30.4cm (12"). From an old Lincoln palaeontological collection, acquired 1970s-1980s; from Xingyi, Guizhou, China. Keichousaurus was a late-Triassic marine reptile, and a member of the Pleurosaur family, and went extinct 250 million years ago during the Triassic-Jurassic extinction event. They were specialised fish eaters, and were highly unusual amongst marine reptiles in that they gave birth to live young rather than laying eggs. Condition Report Fine condition.