Allosarus was large theropod that lived in the Late Jurrassic. It is also known as the king of the Jurrasic. It was slightly smaller than T-Rex,but larger than Yangchuanosarus and Gasasuras. It could grow to be 30 feet long. It weighed almost 2 tons. Scientests know more about Allosuras than any other dinosaur. Allosarus also had a set of hornlets right above the eyes. It had 3 fingers on each hand and could grab its prey. Allosarus lived the U.S.A and Pourgagul.