Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Neogastropoda Wenz, 1938 see Suborder Neogastropoda Wenz, 1938
         Suborder Stenoglossa Bouvier, 1887
           Superfamily Muricoidea Rafinesque, 1815
             Family Buccinidae Rafinesque, 1815 - whelks
               Subfamily Buccininae Rafinesque, 1815
                 Genus Colus Röding, 1798
                   1 Subgenus Anomalisipho Dautzenberg & Fischer, 1912
                   2 Subgenus Latisipho Dall, 1916
                   3 Subgenus Limatofusus Dall, 1918
                   4 Subgenus Siphonellona Wenz, 1941
                   5 Subgenus Siphonorbis Mörch, 1869