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
               1 Genus †Asfaltomylos Rauhut, Martin, Ortiz-Jaureguizar & Puerta, 2002, sedis mutabilis
               2 Genus †Ambondro Flynn, Parrish, Rakotosamimanana, Simpson & Wyss, 1999, sedis mutabilis
               3 Order †Ausktribosphenida Rich,Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1997
               4 Order Monotremata Bonaparte, 1837 - monotremes