Uncover the identity of the Allosaurus with ‘What Sort Of Dinosaur Was The Allosaurus?’. This remarkable dinosaur was a theropod, which means it was a carnivorous dinosaur with two-legged locomotion. Imagine a creature that walked on two powerful hind legs, had sharp teeth, and was a top predator in its ecosystem. The Allosaurus was one of the most iconic theropods of the Late Jurassic period.