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
         Family Aciculidae Gray, 1850
           1 Genus Acicula Hartmann, 1821
           2 Genus Caziotia Pollonera, 1905
           3 Genus Menkia Boeters, Gittenberger & Subai, 1985
           4 Genus Renea Nevill, 1880
           5 Genus Kainarella Starobogatov, 1972
           6 Genus Watsonia Fischer, 1971, nom. illeg.