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 Rachiglossa (Gray, 1853) see Superfamily Muricacea de Costa, 1776
           Superfamily Muricacea de Costa, 1776 see Superfamily Muricoidea Rafinesque, 1815
             Family Muricidae Rafinesque, 1815 - drills
               1 Subfamily Aspellinae Keen, 1971 see Subfamily Muricinae Rafinesque, 1815
               2 Subfamily Muricinae Rafinesque, 1815
               3 Subfamily Rapaninae Gray, 1853
               4 Subfamily Thaidinae Jousseaume, 1888 see Subfamily Rapaninae Gray, 1853
               5 Subfamily Trophoninae Cossmann, 1903
               6 Subfamily Typhinae Cossmann, 1903, nom. illeg.