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
                     1 ?Suborder †Trialestia [monotypic]
                     2 Suborder †Sphenosuchia Bonaparte, 1971 see Order Sphenosuchia Bonaparte, 1972
                     3 Suborder †Protosuchia Mook, 1934 see Order Protosuchia Brown, 1934
                     4 Suborder †Hallopoda Marsh, 1881 [monotypic]
                     5 Suborder †Mesosuchia Huxley, 1875
                     6 Suborder Eosuchia Carroll, 1988, orth. inval. see Suborder Eusuchia Huxley, 1875