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What is a tooth whorl?

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Answer:

Helicoprion ("Spiral Saw") was a long-liced genus of shark-like cartilaginous fish that fist arose in the oceans of the late Caboniferous 280 million years ago, survied the Permian-Triassic Extiction Event, and eventually went extinct during the early Triassic some 225 million years ago. The only known fossils are the teeth, which were arranged in a fantastic "tooth-whorl" strongly reminiscent of a circular saw.

http://en.wikipedia.org/wiki/Helicoprion

First answer by ID0403899907. Last edit by ID0403899907. Question popularity: 18 [recommend question].

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