Eusaurischian
Saurischia ( , meaning "reptile-hipped" from the Ancient Greek, Greek ' () meaning 'lizard' and ' () meaning 'hip joint') is one of the two basic divisions of dinosaurs (the other being Ornithischia), classified by their hip structure. Saurischia and Ornithischia were originally called Order (biology), orders by Harry Seeley in 1888, though today most paleontologists classify Saurischia as an unranked clade rather than an order.Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). (2004). ''The Dinosauria. 2nd edition''. University of California Press, Berkeley. 833 pp. Description All carnivore, carnivorous dinosaurs (certain types of theropods) are traditionally classified as saurischians, as are all of the birds and one of the two primary lineages of herbivore, herbivorous dinosaurs, the sauropodomorphs. At the end of the Cretaceous Period (geology), Period, all saurischians except birds became extinct in the course of the Cretaceous–Paleogene extinction event. Birds, as ...
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