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 Truncaria Adams & Reeve, 1850
                   1 Subgenus Buccinopsis Deshayes, 1865, nom. illeg.
                   2 Subgenus Coptaxis Cossmann, 1901