Clade Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
   Clade Trechnotheria McKenna 1975
     Clade Alethinotheria Averianov, Martin & Lopatin 2013
       Clade Cladotheria McKenna 1975
         Clade †Dryolestida Prothero 1981 see Order Dryolestida Prothero, 1981
           Family †Dryolestidae Marsh, 1879
             Subfamily †Kurtodontinae Osborn, 1888
               1 Genus †Crusafontia Henkel & Krebs, 1969
               2.1 Genus †Achyrodon Owen, 1871
               2.2 Genus †Phascolestes Owen, 1871