living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         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
                 Superfamily Littorinacea Gray, 1840 see Superfamily Littorinoidea Children, 1834
                   Family Littorinidae Children, 1834 - periwinkles
                     1 Subfamily Littorininae Children, 1834
                     2 Subfamily Tectariinae Rosewater, 1972 see Subfamily Littorininae Children, 1834
                     3 Subfamily Echinininae Rosewater, 1972 see Subfamily Littorininae Children, 1834
                     4 Genus Cremnoconchus Blanford, 1869
                     5 Genus Bembicium Philippi, 1846