extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts

herbivorous dinosaur with a pelvis like that of a bird

massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period

herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile

a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America

amphibious quadrupedal herbivorous dinosaur with a long thin neck and whiplike tail; of the Cretaceous mostly in the southern hemisphere