Archosauromorpha Huene 1946 [Benton 1985], nom. cl. inval. see Clade Archosauromorpha von Huene 1946 [Gauthier 2020]
   Archosauriformes Gauthier 1994, nom. cl. inval. see Clade Archosauriformes Gauthier 1994 [Gauthier 2020]
     Crurotarsi Sereno & Arcucci 1990
       Archosauria Cope 1869 [Gauthier & Padian 1985], nom. cl. inval. see Clade Archosauria Cope 1869 [Gauthier & Padian 2020]
         Pseudosuchia Zittel 1887-1890 [Gauthier & Padian 1985]
           Suchia Krebs 1974 [Sereno 1991]
             †Aetosauria Marsh 1884 [Heckert & Lucas 2000] see Order Aetosauria Nicholson & Lydekker, 1889
               Genus †Stagonolepis Agassiz, 1845
                 1 †Stagonolepis robertsoni Agassiz, 1844