giganotosaurus carnivorous dinosaur

age aggressive alberta animal argentina beak brachyceratops canada carnivore carolinii ceratopsian ceratopsid claws creature cretaceous dinosaur epoch era evolution extinct extinction fierce frill genus giganotosaurus herbivore horn hunter illustration image lizard mesozoic montana montanensis neck organism paleontology period picture predator prehistoric primeval primitive reptile species teeth themes theropod usa vertebrate wild wildlife