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 Seguenzioidea Verrill, 1884
         1 Family Seguenziidae Verrill, 1884
         2 Family Chilodontidae Wenz, 1938, nom. illeg.
         3 Family †Eucyclidae Koken, 1896
         4 Family †Laubellidae Cox, 1960