Allosaurus Tooth in MatrixAllosaurus, meaning "different lizard" was a large theropod dinosaur which lived in abundance, predominantly in North America, during the Jurassic time period, some 150 million years ago. Allosaurus had a very muscular body and a massive jaw, filled with sharp serrated teeth which it wielded down upon its prey like an ax. However as Allosaurus' bite force was relatively weak compared to T rex and other theropods, it is theorized the beast was only