Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Eogastropoda Ponder & Lindberg, 1995
         Order Patellogastropoda Lindberg, 1986
           Suborder Nacellina Lindberg, 1988 see Superfamily Nacelloidea Thiele, 1891
             1 Superfamily Nacelloidea Thiele, 1891
             2 Superfamily Acmaeoidea Carpenter, 1857 see Superfamily Lottioidea Gray, 1840