Dinosauria Owen 1841 Saurischia Seeley 1887 [Gauthier 1986] Theropoda Marsh 1881 [Gauthier 1986] Neotheropoda Bakker 1986 [Sereno 1998] Tetanurae Gauthier 1986 1 †Spinosauroidea Olshevsky 1995 see Subdivision Spinosauroidea Olshevsky, 1995 2 Neotetanurae Sereno et al. 1994 see Clade Avetheropoda Paul 1988 [Padian et al. 1999]