Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Heterobranchia Burmeister, 1837
           Order Pulmonata Cuvier, 1814
             Suborder Systellommatophora Pilsbry, 1948
               1 Superfamily Onchidioidea Rafinesque, 1815
               2 Superfamily Otinoidea Adams & Adams, 1855
               3 Superfamily Rathouisioidea Sarasin, 1899 see Superfamily Veronicelloidea Gray, 1840