Helicoprion, whorl-tooth shark Dimorphodon Around 90 percent of the

Around 90 percent of the specimen’s bones were recovered

plus first

This dwarf mammoth tooth shows the ridges of enamel cemented by dentine

) and possibly snakes

Sloth Claw

Helicoprion, whorl-tooth shark Dimorphodon Around 90 percent of theHelicoprion ("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