Saurischia ( , from the
Greek sauros (
σαυρος) meaning 'lizard' and
ischion (
ισχιον) meaning "hip joint") is one of the two basic divisions of
dinosaurs (the other being
Ornithischia). In 1888,
Harry Seeley classified dinosaurs into two
orders, based on their hip structure, though today most paleontologists classify Saurischia as an unranked
clade rather than an order.