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 Conoidea Fleming, 1822
             Family Drilliidae Olsson, 1964
               Subfamily Drilliinae Olsson, 1964 see Family Drilliidae Olsson, 1964
                 01 Genus Agladrillia Woodring, 1928
                 02 Genus Bellaspira Conrad, 1868
                 03 Genus Calliclava McLean, 1971
                 04 Genus Cerodrillia Bartsch & Rehder, 1939
                 05 Genus Clavus Montfort, 1810
                 06 Genus Plagiostropha Melvill, 1927
                 07 Genus Cymatosyrinx Dall, 1889
                 08 Genus Elaeocyma Dall, 1918
                 09 Genus Globidrillia Woodring, 1928
                 10 Genus Horaiclavus Oyama, 1954
                 11 Genus Imaclava Bartsch, 1944
                 12 Genus Iredalea Oliver, 1915
                 13 Genus Kylix Dall, 1919
                 14 Genus Leptadrillia Woodring, 1928
                 15 Genus Neodrillia Bartsch, 1943
                 16 Genus Orrmaesia Kilburn, 1988
                 17 Genus Splendrillia Hedley, 1922
                 18 Genus Spirotropis Sars, 1878
                 19 Genus Syntomodrillia Woodring, 1928
                 20 Genus Tylotiella Habe, 1958
                 21 ?Genus Acinodrillia Kilburn, 1988
                 22 ?Genus Douglassia Bartsch, 1934
                 23 ?Genus Paracuneus Laseron, 1954
                 24 Genus Drillia Gray, 1838
                 25 Genus Fenimorea Bartsch, 1934
                 26 Genus Sediliopsis Petuch, 1988