Order Polyprotodontia (Owen, 1866)
   1 Suborder Didelphimorphia Gill, 1872 see Order Didelphimorphia Gill, 1872
   2 Suborder Dasyuromorphia Gill, 1872 see Order Dasyuromorphia Gill, 1872
   3 Suborder Peramelemorphia Ameghino, 1889 see Order Peramelia Ameghino, 1889
   4 Suborder Notoryctemorphia Kirsch, 1977 see Order Notoryctemorphia Kirsch, 1977