Class Mammalia Linnaeus, 1758 - mammals
   Subclass Acrotheria Averianov & Lopatin, 2011
     Infraclass †"Triconodonta" Osborn, 1888 [paraphyletic] see Order Triconodonta Osborn, 1888
       Order †"Phascolotheria" Ameghino, 1889 [paraphyletic]
         1 Family †Amphilestidae Osborn, 1888