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 Turridae Adams & Adams, 1853 (1838) - turret snails
               Subfamily Clavatulinae Gray, 1853 see Family Clavatulidae Gray, 1853
                 Genus Turricula Schumacher, 1817
                   1 Subgenus Turricula Schumacher, 1817
                   2 Subgenus Catenotoma Cossmann, 1900
                   3 Subgenus Crenaturricula Vokes, 1939
                   4 Subgenus Leptosurcula Casey, 1904