Opallionectes

Sea reptiles that swam with four large flippers, many with very long necks. Pliosaurs are a branch of the group with short necks and big heads, the top predators of their seas.

Who it is related to: Part of the Sauropterygia, a branch of reptiles separate from the dinosaurs.

This page has only the scientific data from the databases; there is no hand-written description yet.