Allosauroidea were a clade of theropod dinosaurs. The oldest-known allosauroid, Shidaisaurus, appeared in the early Middle Jurassic (probably Bajocian...

Saurischia Suborder: Theropoda Infraorder: Carnosauria Superfamily: Allosauroidae Family: Metriacanthosauridae Genus: Metriacanthosaurus Species: M. parkeri...