Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758
       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
             Genus Aporrhaias see Genus Aporrhais da Costa, 1778
             Genus Architectonica Röding, 1798
             Genus Carinaria Lamarck, 1801
             Genus Cassis Scopoli, 1777
             Genus Cerithium Bruguière, 1789
             Genus Cypraea Linnaeus, 1758
             Genus †Cyrtospira Ulrich, 1897
             Genus Epitonium Röding, 1798
             Genus Littorina Férussac, 1822
             Genus Polinices Montfort, 1810
             Genus Trivia Gray, 1837
             Genus Turritella Lamarck, 1799
             Genus Vermicularia Lamarck, 1799
             Genus Viviparus Montfort, 1810
             Genus Xenophora Fischer von Waldheim, 1807