Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods
         Suborder Taenioglossa see Order Mesogastropoda Thiele, 1925
           Superfamily Tonnacea Suter, 1913 see Superfamily Tonnoidea Suter, 1913 (1825)
             Family Cymatiidae Iredale, 1913 see Family Ranellidae Gray, 1854
               Subfamily Cymatiinae Iredale, 1913 (1854)
                 Genus Cymatium Röding, 1798
                   Subgenus Cymatium (Gutturnium) Mörch, 1852