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Allosaurus, who was previously known as Antrodemus, was one of a large genus (group) of dinosaur, who's remains have been found as far a field as America, Africa and the Australian Continent.
Allosaurus weighed about 2 tonnes (2,000kg) and could grow up to 12 metres (40ft) in length. he had a long tail, like a lot of other dinosaurs, for balance.
Allosaurus, a biped, had very strong hind limbs and a massive pelvis with strong anteriorly and posteriorly directed projections. The forelimbs, much smaller than the hind limbs and probably used for grasping, had three fingers ending in sharp claws. The skull was very large in relation to the compact body and was lightened by the presence of several large openings. The powerful jaws had large pointed teeth and were very flexible, allowing the animal to take large bites out of its prey. It is likely that Allosaurus preyed upon the medium-sized dinosaurs, especially the ornithopod forms and their relatives. It is possible that Allosaurus was also a scavenger, feeding upon carcasses of dead or dying animals. It may have hunted in groups.
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