restoration of an allosaurus (allosaurus fragilis) dinosaur .

age allosaurus america animal antrodemus background big bipedal carnivorous carnosauria claws creature dangerous dino dinosaur dinosauria extinct extinction fossil fragilis gigantic grand head hunter isolated jurassic large lizard meateating model monster paleontological paleontology period powerful predator prehistoric reptile restoration restored saurophaganax scary stare trex teeth terrible theropoda triassic tyrannosaurus white