Pliosauroidea Humerus bone Sagittal cross sections replaced by Pyrite-
Volga RIver, Village of Gorodishche, Ulyanovsk, Russia.
8 inches tall
Pliosauroidea is an extinct clade of marine reptiles. Pliosauroids, also commonly known as pliosaurs, are known from the Jurassic and Cretaceous Periods. The Pliosauroids were short-necked plesiosaurs with large heads and massive toothed jaws. These swimming reptiles were not dinosaurs, but distant cousins of modern turtles.
