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
         Suborder Taenioglossa see Order Mesogastropoda Thiele, 1925
           Superfamily Cypraeacea see Superfamily Cypraeoidea Rafinesque, 1815
             Family Ovulidae Fleming, 1822 - egg snails
               Subfamily Simniinae Schilder, 1927 see Tribe Ovulini Fleming, 1822
                 1 Genus Hiata Cate, 1973, nom. illeg. see Genus Hiatavolva Cate, 1973
                 2 Genus Phenacovolva Iredale, 1930
                 3 Genus Prosimnia Schilder, 1927
                 4 Genus Sandalia Cate, 1973
                 5 Genus Volva Röding, 1798