Wikipedia
Sapheosaurus
Sapheosaurus (also known as Piocormus) was a sphenodontid of the suborder Homoeosauria, although its skull was longer and narrower than that of Homoeosaurus. It was classified as a genus of sapheosaurid by Michael Benton in 1985. It reached a length of 70 cm from snout to tail. Sapheosaurus belongs to the clade Sapheosauridae, that also includes other taxa like Ankylosphenodon; it is belived to be was one of two aquatic sphenodont lineages, with Pleurosauridae being the other.