plesiosaur Synonyms

plesiosaurus alligator sauropod Ornithischia Saurischia archosaur diplodocus ornithopod genus Plesiosaurus gigantosaurus palaeosaurus stegosaurus pterosaur animal brontosaurus ceratosaurus dinosaur ichthyosaur iguanodon mammoth megalosaurus morosaurus plesiosaurian pterodactyl scelidosaurus