 New fossil material ready for extraction. Extracting Species Profile. Homilicephaly sported a thick, flat skull, which was used to headbutt others of its genus in competition and would have helped to protect it from predators. Extracting Species Profile. Nitrosaurus, a large herbivore dinosaur that had a flat, vacuum-shaped mouth, packed with hundreds of teeth and comically-wide jaws. Extracting Species Profile. Dryosaurus was a swift and agile plant-eating dinosaur with an elongated neck, slender but powerful back legs, and a long, stiff tail to balance its body.