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 Architaenioglossa Haller, 1890
           Superfamily Cerithioidea Fleming, 1822
             Family Turritellidae Lovén, 1847 - turret snails
               Subfamily Turritellinae Lovén, 1847
                 Genus Colpospira Donald, 1900
                   1 Subgenus Acutospira Kotaka, 1959
                   2 Subgenus Ctenocolpus Iredale, 1925
                   3 Subgenus Platycolpus Donald, 1900