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 †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869
                     Suborder †Aetosauria Nicholson & Lydekker, 1889 [monotypic] see Order Aetosauria Nicholson & Lydekker, 1889
                       Family †Stagonolepididae Lydekker, 1887 - aetosaurs
                         1 Genus †Aetosaurus Fraas, 1877
                         2 ?Genus †Ebrachosaurus Kuhn, 1936
                         3 Genus †Stagonolepis Agassiz, 1845
                         4 Genus †Aetosauroides Casamiquela, 1960
                         5 Genus †Argentinosuchus Casamiquela, 1960, nom. dub.
                         6 Genus †Neoaetosauroides Bonaparte, 1969
                         7 Genus †Desmatosuchus Case, 1920
                         8 Genus †Stegomus Marsh, 1896
                         9 Genus †Typothorax Cope, 1875