Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         1 Superorder Cocculiniformia Haszprunar, 1987 see Superfamily Cocculinoidea Dall, 1882
         2 Superorder "hot vent taxa" Ponder & Lindberg, 1997 see Superorder Vetigastropoda Salvini-Plawen, 1980
         3 Superorder Vetigastropoda Salvini-Plawen, 1980 see Order Vetigastropoda Salvini-Plawen, 1980
         4 Superorder Neritaemorphi Koken, 1896 see Order Neritimorpha Golikov & Starobogatov, 1975
         5 Superorder Caenogastropoda Cox, 1960
         6 Superorder Heterobranchia Burmeister, 1837