saurischian
Saurischia (meaning "reptile-hipped" from the Greek sauros meaning 'lizard' and ischion meaning 'hip joint') is one of the two basic divisions of dinosaurs, the other being ornithischian. Saurischians are distinguished from ornithischians by their three-pronged pelvic structure, with the pubis bone pointed forward, a trait retained from their reptile ancestors. Ornithischians, by contrast, have a pubis rotated…
