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
           Order †Morganucodonta Kermack, Mussett & Rigney, 1973
             Family †Megazostrodontidae Gow, 1986
               Genus †Brachyzostrodon Sigogneau-Russell, 1983