Class Mammalia Linnaeus, 1758 - mammals
   Subclass Acrotheria Averianov & Lopatin, 2011
     Infraclass Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
       Superlegion "Prototheria" Gill, 1872 [paraphyletic] see Subclass Prototheria Gill, 1872
         Legion Australosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 see Clade Australosphenida Luo, Cifelli & Kielan-Jaworowska 2001
           Order †Ausktribosphenida Rich,Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1997 [monotypic]
             Family †Ausktribosphenidae Rich, Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1997
               1 Genus †Ausktribosphenus orth. inval. see Genus Ausktribosphenos Rich, Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1997
               2 Genus †Bishops Rich, Flannery, Trusler, Constantine, Kool, van Klaveren & Vickers-Rich, 2001