Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Vetigastropoda Salvini-Plawen, 1980 see Order Vetigastropoda Salvini-Plawen, 1980
           1 Superfamily Pleurotomarioidea Swainson, 1840
           2 Superfamily Haliotoidea Rafinesque, 1815
           3 Superfamily Lepetodriloidea McLean, 1988
           4 Superfamily Fissurelloidea Fleming, 1822
           5 Superfamily Trochoidea Rafinesque, 1815
           6 Superfamily Seguenzioidea Verrill, 1884