Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Heterobranchia Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
       Informal Group Opisthobranchia Milne-Edwards, 1846 see Order Opisthobranchia Milne-Edwards, 1848
         Clade Cephalaspidea Fischer, 1883 see Order Cephalaspidea Fischer, 1883
           1 Superfamily Bulloidea Gray, 1827
           2 Superfamily Diaphanoidea Odhner, 1914 (1857)
           3 Superfamily Haminoeoidea Pilsbry, 1895
           4 Superfamily Philinoidea Gray, 1850 (1815)
           5 Superfamily Runcinoidea Adams & Adams, 1854