Tetrapoda Goodrich, 1930
Amniota Haeckel, 1866 - amniotes
Eureptilia Olson, 1947
Diapsida Osborn 1903 [Laurin 1991]
Neodiapsida Benton 1985 [Laurin 1991]
see Clade Neodiapsida Benton 1985 [Laurin 1991] {Reisz, Modesto & Scott 2011}
Archosauromorpha Huene 1946 [Gauthier, Kluge & Rowe 1988] {Laurin 1991}
Archosauria Cope, 1869
Avesuchia Benton, 1999
Avemetatarsalia Benton 1999
Ornithodira Gauthier 1986
Dinosauromorpha Benton 1985
Dinosauriformes Novas 1992
Dinosauria Owen 1841
Saurischia Seeley 1887 [Gauthier 1986]
Eusaurischia Padian et al., 1999
1.1? Genus †Guaibasaurus Bonaparte, Ferigolo & Ribeiro, 1999 [monotypic]
1.2 Theropoda Marsh 1881 [Gauthier 1986], nom. cl. inval.
2.1 †Saturnalia Langer, Abdala, Richter & Benton, 1999 [monotypic]
2.2 †Sauropodomorpha Huene 1932 [Salgado et al. 1997]
see Order Sauropodomorpha Huene, 1932