Dinosauria Owen 1841 Saurischia Seeley 1887 [Gauthier 1986] Theropoda Marsh 1881 [Gauthier 1986] Neotheropoda Bakker 1986 [Sereno 1998] 1 †Ceratosauria Marsh 1895 [Rowe & Gauthier 1990] 2 Tetanurae Gauthier 1986