Helicoprion, whorl-tooth shark Protoceratops and a long

and a long

They had pointed heads filled with sharp teeth which indicates they were aquatic and fish eaters

Chasmosaur front foot

three clawed fingers on each forearm and

Helicoprion, whorl-tooth shark Protoceratops and a longHelicoprion ("Spiral Saw") was a long lived genus of shark like cartilaginous fish that first arose in the oceans of the late Carboniferous 280 million years ago, survived the Permian Triassic Extinction Event, and eventually went extinct during the early Triassic some 225 million years ago. The only fossils known are the teeth, which were arranged in a fantastic "tooth whorl" strongly reminiscent of a circular saw. It was not until the discovery of