[Reptilia] Linnaeus 1758 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Class Reptilia Linnaeus, 1758
   Clade Diapsida Osborn 1903 [Laurin 1991] see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
     Clade Eosuchia Broom 1914 [Laurin 1991]
       Clade Neodiapsida Benton 1985 [within unnamed taxon]
         Clade †Younginiformes Romer 1933 [Laurin 1991]
           1 Genus †Acerosodontosaurus Currie, 1980
           2 Genus †Youngina Broom, 1914