Did you mean: Pachypleurosaurus
Pachypleurosaur
Reptiles
Pachypleurosauria is an extinct clade of primitive sauropterygian reptiles from the Triassic period. Pachypleurosaurs vaguely resembled aquatic lizards, with elongate forms ranging in size from 0.2–1 metre, with small heads, long necks,... Wikipedia
Lower classifications