Cymbospondylus

Cymbospondylus meaning " boat spines " is an early, primitive ichthyosauria a genus, existence in the late Triassic, about 200 million from 40 million to 200 million 10 million years ago. Cymbospondylus was originally classified as primitive shastasauridae, Chaohusaurus with Mixosaurus relationship closer. Cymbospondylus appearance similar eel makes some scientists wonder whether they are true ichthyosaurs. Recent studies suggest that a Cymbospondylus shastasauridae more primitive.