Mammalia Linnaeus, 1758 - mammals
   Carnivoramorpha Wyss & Flynn, 1993
     Carnivoraformes Flynn, Finarelli & Spaulding 2010
       [stem] Family †Miacidae Cope, 1880
         †Vulpavus group Marsh, 1871
           †Vassacyon promicrodon (Wortman & Matthew, 1899)