Infraphylum Tetrapoda Goodrich, 1930 see Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
   Superclass Amniota Haeckel, 1866 see Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
     Paraclass Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
       Parasubclass Diapsida Osborn, 1903 [paraphyletic] - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
         Parainfraclass Archosauria Cope, 1869 [paraphyletic] see Clade Archosauria Cope 1869 [Gauthier & Padian 2020]
           Superorder †Ornithischia Seeley, 1887 see Order Ornithischia Seeley, 1887
             Paraorder †Lesothosauria Olshevsky, 1991 [paraphyletic]
               1 Family †Lesothosauridae Halstead & Halstead, 1981 [monotypic]
               2 Genus †Alocodon Thulborn, 1973, nom. dub., incertae sedis
               3 Genus †Fabrosaurus Ginsburg, 1964, nom. dub., incertae sedis
               4 ?Genus †Nanosaurus Marsh, 1877
               5 ?Genus †Technosaurus Chatterjee, 1984
               6 Genus †Trimucrodon Thulborn, 1973, nom. dub., incertae sedis