Class Mammalia Linnaeus, 1758 - mammals
   Subclass †"Apotheria" Averianov & Lopatin, 2011 [paraphyletic]
     1 Superorder †"Archaeotriconodonta" Averianov & Lopatin, 2011 [paraphyletic]
     1.n1.1 Superorder †Archaeosymmetrodonta Averianov & Lopatin, 2011 [monotypic]
     1.n1.2.1 Superorder †Paratribosphenida Averianov & Lopatin, 2011 [sister group to excluded taxa]