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 Opisthobranchia Milne-Edwards, 1848
             Suborder Cephalaspidea Fischer, 1883 - bubble snails see Order Cephalaspidea Fischer, 1883
               1 Superfamily Acteonoidea d'Orbigny, 1843
               2 Superfamily Bulloidea Gray, 1827
               3 Superfamily Cylindrobulloidea Thiele, 1931
               4 Superfamily Diaphanoidea Odhner, 1914 (1857)
               5 Superfamily Haminoeoidea Pilsbry, 1895
               6 Superfamily Philinoidea Gray, 1850 (1815)
               7 Superfamily Ringiculoidea Philippi, 1853