restoration of a herrerasaurus (herrerasaurus ischigualastensis) dinosaur

america animal background big carnivorous claws creature dangerous dino dinosaur dinosauria extinct extinction fossil frenguellisaurus gigantic grand head herrera herrerasaurus hunter ischigualastensis ischisaurus isolated jurassic ladinian large lizard meateating model monster paleontology patagonia period powerful predator prehistoric reptile restoration scary south stare trex teeth terrible theropoda triassic tyrannosaurus white