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
       Superfamily Clavacea
         Family Turritellidae Lovén, 1847 - turret snails
           Genus Mesalia Gray, 1847
             Subgenus †Sigmesalia Finlay & Marwick, 1937 see Genus Sigmesalia Finlay & Marwick, 1937
               1 †Mesalia fasciata (Lamarck)
               2 †Mesalia rakhiensis F.E. Eames, 1952
               3 †Mesalia soriensis F.E. Eames, 1952