Clade Cynodontia Owen 1861 [Gauthier, Kluge & Rowe 1988]
   Clade Epicynodonts Hopson & Kitching 2001
     Clade Eucynodontia Kemp 1982 [Rowe 1993]
       Clade Mammaliamorpha Rowe 1988
         1 Family †Tritylodontidae Cope
         2.1 Family †tritheledontids Broom
         2.2 Class Mammalia Linnaeus, 1758 - mammals