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Agriotherium was about 9 feet in body length
It was a small
such as Ceratotherium (modern white rhinos)
With a body mass greater than most large ungulates (horses
straight teeth
Helicoprion, whorl-tooth shark Pachycephalosaurus Agriotherium was about 9 feetHelicoprion ("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
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