Spinosaurus, giant claw Stegosaurus One frog-like form

One frog-like form

The Liaoning region

is often a key diagnostic factor in identifying an archaeological industry or culture

Hamilton and Elias Davis Caves in Pendleton County

The original fossil was found in the Bobcaygeon Formation of the Lake Simcoe area of Ontario

Spinosaurus, giant claw Stegosaurus One frog-like formSpinosaurus probably had over 70 straight conical teeth that lacked serrations. They also varied greatly in size and length. Most of the teeth found are under 3 inches long without the root. However, a few teeth up to 12 inches long including the root have been found. Spinosaurus was the biggest of all the carnivorous dinosaurs, larger than Tyrannosaurus and Giganotosaurus. It lived during part of the Cretaceous period, about 112 million to 97 million