Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
             Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
               Infraclass Archosauromorpha Huene, 1946 see Clade Archosauromorpha Huene 1946 [Benton 1985], nom. cl. inval.
                 Superorder Archosauria Cope, 1869 - archosaurs see Clade Archosauria Cope 1869 [Gauthier & Padian 1985], nom. cl. inval.
                   Order Crocodylia Wagler, 1830 - crocodiles
                     Suborder †Protosuchia Mook, 1934 see Order Protosuchia Brown, 1934
                       Family †Protosuchidae Brown, 1934
                         01 Genus †Baroqueosuchus Busbey & Gow, 1984 see Genus Protosuchus Brown, 1934
                         02 Genus †Dianosuchus Young, 1982
                         03 Genus †Eopneumatosuchus Crompton & Smith, 1980
                         04 Genus †Hemiprotosuchus Bonaparte, 1969
                         05 Genus †Lesothosuchus Whetstone & Whybrow, 1983
                         06 Genus †Notochampsa Broom, 1904
                         07 Genus †Erythrochampsa Haughton, 1924, nom. dub.
                         08 Genus †Pedeticosaurus van Hoepen, 1915, nom. dub.
                         09 Genus †Protosuchus Brown, 1934
                         10 Genus †Stegomosuchus von Huene, 1922