Allosaurus

About Allosaurus Allosaurus lived during the Late Jurassic Period around 140 million years ago. It is one of the largest and most fearsome predators to have ever lived on land. Allosaurus had short arms, ending in sharp 10 long dagger-like claws, which it could use to tear into the flesh of its victims. Sharp four inch long teeth were also used to tear apart the dead and dying victims that were unfortunate enough to have been hunted by Allosaurus. Fossils found in Utah, North America suggest that Allosaurus may have lived and hunted in groups or packs. As a pack, Allosaurus would have had little difficulty hunting the largest dinosaurs of the time. One fossil of a large plant eating Apatosaurus has what look like the teeth marks of Allosaurus scraped into it.