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Scientific classification
Kingdom Information
Domain Eukaryota
Kingdom Animalia
Subkingdom Bilateria
Branch Deuterostomia
Phylum Information
Phylum Chordata
Sub-phylum Vertebrata
Infraphylum Gnathostomata
Class Information
Superclass Tetrapoda
Class Reptilia
Sub-class Diapsida
Infra-class Archosauromorpha
Order Information
Superorder Dinosauria
Order Saurischia
Sub-order Theropoda Sauropodomorpha
Population statistics
Conservation status Extinct

Saurischia (Greek: σαυρος sauros; and ισχιον ischion; "lizard-hipped"), one of the two major orders of the dinosaurs which were arranged in 1888 on the basis of many species sharing a common structure of the pelvic bones. Saurischian dinosaurs are again divided into two suborders: the Theropoda - carnivorous dinosaurs including Tyrannosaurus rex; and Sauropodomorpha, which were mainly long-necked herbivores, some of which were the largest animals to have walked the earth.


  • Order Saurischia
    • Suborder Theropoda
Infraorder Carnosauria
Family Abelisauridae
Family Allosauridae
Family Baryonychidae
Family Ceratosauridae
Family Dryptosauridae
Family Megalosauridae
Family Spinosauridae
Family Tyrannosauridae
Infraorder Coelurosauria
Family Coelophysidae
Family Coeluridae
Family Compsognathidae
Family Noasauridae
Infraorder Deinonychosauria
Family Dromaeosauridae
Family Sauronithoididae
Family Therizinosauridae
Family Troodontidae
Infraorder Herrerasauria
Family Herreasauridae
Family Staurikosauridae
Infraorder Ornithomimosauria
Family Deinocheiridae
Family Garudimimidae
Family Ornithomimidae
Infraorder Oviraptorosauria
Family Avimimidae
Family Caenagnathidae
Family Oviraptoridae
    • Suborder Sauropodamorpha
Infraorder Prosauropoda
Family Anchisauridae
Family Plateosauridae
Family Melanorosauridae
Infraorder Sauropoda
Family Brachiosauridae
Family Camarasauridae
Family Cetiosauridae
Family Diplodocidae
Family Euhelopodidae
Family Titanosauridae