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]
           Parasuperorder †Theropodomorpha Olshevsky, 1991 [paraphyletic]
             Paraorder †Theropoda Marsh, 1881 [paraphyletic]
               Suborder †Deinonychosauria Colbert & Russell, 1969 see Cohort Deinonychosauria Colbert & Russell, 1969
                 Family †Troodontidae Gilmore, 1924
                   Genus †"Sinornithoides" Anon., 1990, nom. nud. see Genus Sinornithoides Russell & Dong, 1993