Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Vetigastropoda Salvini-Plawen, 1980 see Order Vetigastropoda Salvini-Plawen, 1980
       Superfamily Lepetelloidea Dall, 1882
         Family Addisoniidae Dall, 1882
           1 Subfamily Addisoniinae Dall, 1882
           2 Subfamily Helicopeltinae Marshall, 1996