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
Genus †Guaibasaurus Bonaparte, Ferigolo & Ribeiro, 1999 [monotypic]
1 †Guaibasaurus candelariensis Bonaparte et al., 1999