Class Mammalia Linnaeus, 1758 - mammals
   Subclass Acrotheria Averianov & Lopatin, 2011
     Infraclass Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
       1 Superlegion "Prototheria" Gill, 1872 [paraphyletic] see Subclass Prototheria Gill, 1872
       1.n.1 Family †Peramuridae Kretzoi, 1946
       1.n.2 Superlegion Theria Parker & Haswell, 1897 see Subclass Theria Parker & Haswell, 1897