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 Muricidae Rafinesque, 1815 - drills
               Subfamily Trophoninae Cossmann, 1903
                 01 Genus Trophon Montfort, 1810
                 02 Genus Abyssotrophon Egorov, 1993
                 03 Genus Actinotrophon Dall, 1902
                 04 Genus Afritrophon Tomlin, 1947
                 05 Genus Anatrophon Iredale, 1929
                 06 Genus Apixystus Iredale, 1929
                 07 Genus Benthoxystus Iredale, 1929
                 08 Genus Chathamidea Radwin & D'Attilio, 1975, orth. inval. see Genus Chathamidia Dell, 1956
                 09 Genus Comptella Finlay, 1926
                 10 Genus Fuegotrophon Powell, 1951
                 11 Genus Gemixystus Iredale, 1929
                 12 Genus Litozamia Iredale, 1929
                 13 Genus Minortrophon Finlay, 1927
                 14 Genus Ocenotrophon McLean, 1995
                 15 Genus Paratrophon Finlay, 1927
                 16 Genus Trophonopsis Bucquoy & Dautzenberg, 1882
                 17 Genus Xenotrophon Iredale, 1929
                 18 Genus Xymene Iredale, 1915
                 19 Genus Xymenopsis Powell, 1951