article: Saurischia
links: Eodromaeus murphi Herbivore Brachiosaurus Carnivore Eodromaeus Theropoda Common descent Tyrannosaurus Herrerasauridae Tyrannosaurus rex Theropod Holocene Late Triassic Middle Triassic Velociraptor Sauropodomorph Herrerasaurus ischigualastensis Sauropodomorpha Ornithischia Scientific classification Order (biology) Apatosaurus louisae Plateosaurus engelhardti Saltopus Diplodocus Sauropod Dromaeosauridae Simon & Schuster