The Spinosauroidea (officially known as Megalosauroidea) is a superfamily of theropod dinosaurs. The clade Spinosauroidea was defined in 1998 by Paul Sereno as the node clade containing the common ancestor of Spinosaurus and Torvosaurus and all its descendants. Thomas Holtz in 2004 defined a stem clade with the same name containing all species closer to Spinosaurus than to Passer domesticus. Both clades within all probability include the clade Spinosauridae.