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
                 Crurotarsi [Sereno & Arcucci 1990]
                   1.1 †Phytosauridae Lydekker, 1888
                   1.2 Genus †Gracilisuchus Romer, 1972
                   2 †Ornithosuchidae Huene, 1908
                   3 Suchia Krebs, 1974