Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
         Suborder Ptenoglossa Gray, 1853 see Infraorder Ptenoglossa Gray, 1853
           1 Family Cerithiopsidae Adams & Adams, 1853
           2 Family Triforidae Jousseaume, 1884 see Family Triphoridae Gray, 1847
           3 Family Triphoridae Gray, 1847
           4 Superfamily Janthinoidea Lamarck, 1822 see Superfamily Epitonioidea Berry, 1910 (1812)
           5 Superfamily Eulimoidea Philippi, 1853
           6 Superfamily Loxonematoidea Koken, 1889 [monotypic]