Clade Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
   Clade Trechnotheria McKenna 1975
     Clade Alethinotheria Averianov, Martin & Lopatin 2013
       Clade †Meridiolestida Rougier, Apesteguía & Gaetano 2011 see Order Meridiolestida Rougier, Apesteguía & Gaetano, 2011
         Genus †Leonardus Bonaparte, 1990
           1 †Leonardus cuspidatus Bonaparte, 1990