This is a nice rooted tooth from MOSASAUR, still partially in the matrix or rock. The tooth measures 3.785 inches in total length. Mosasaur was a marine reptile with four large paddles and a large, powerful tail.? It had a loosely hinged jaw which allowed it to swallow its prey almost whole.?Mosasaurs lived about 85-65 million years ago. We have a variety of Mosasaur teeth for sale so be sure to check out our other listings!Fossils, Meteorites, & More