The earliest confirmed dinosaur fossils include the saurischian ('lizard-hipped') dinosaurs "Herrerasaurus" 230–220 mya, "Staurikosaurus" possibly 230–225 mya, "Eoraptor" 231.4 mya, and "Alwalkeria" 230–220 mya. "Saturnalia", 232–225 mya, may be a basal saurischian or a prosauropod. The others are basal saurischians.