Class Mammalia Linnaeus, 1758 - mammals
   Subclass Acrotheria Averianov & Lopatin, 2011
     Infraclass †"Symmetrodonta" Simpson, 1925 [paraphyletic]
       Order †Tinodontida Prothero, 1981 [sister group to excluded taxa] [monotypic]
         1 Family †Tinodontidae Marsh, 1887