Clade Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988]
   Clade Epicynodonts Hopson & Kitching 2001
     Clade Eucynodontia Kemp 1982 [Rowe 1993]
       Clade Mammaliamorpha Rowe 1988
         Class Mammalia Linnaeus, 1758 - mammals
           Clade Yinotheria Chow & Rich 1982 [Kielan-Jaworowska, Cifelli & Luo 2004]
             Subclass Australosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 see Clade Australosphenida Luo, Cifelli & Kielan-Jaworowska 2001
               Order †Ausktribosphenida Rich,Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1997
                 1 Genus †Ausktribosphenos Rich, Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1997, sedis mutabilis
                 2 Genus †Bishops Rich, Flannery, Trusler, Constantine, Kool, van Klaveren & Vickers-Rich, 2001, sedis mutabilis