Helicoprion

Helicoprion

Known as Spiral Saw, Helicoprion life during the Carboniferous period, and is one of the few creatures able to survive life during ancient extinct animals Permian-Triassic ('The Great Dying'). But eventually Helicoprion extinct during the Triassic period. Although not many fossils have been found, the archaeologists discovered the ring-tooth and jaw bone. With the remnants of it, researchers had to concoct a piece in a certain form of Helicoprion. One thing we know for sure, these creatures have teeth that are very much like circular saws, which stuck on the lower jaw. Her teeth were so many because so there are new teeth grow, the older gear forced into the middle to form a spiral. The length of the creature was estimated to about 10-15 feet.