Superfamily Scarabaeoidea Latreille, 1802
   Family Scarabaeidae Latreille, 1802 - scarab beetles, dung beetles, and june "bugs"
     Subfamily Melolonthinae Leach, in Samouelle, 1819
       Tribe Xylonychini Britton, 1957 see Tribe Xylonichini Britton, 1957, nom. emend.
         Genus Xylonychus err. see Genus Xylonichus Boisduval, 1835