Kingdom Animalia Linnaeus, 1758 - animals
   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
           01 Family Hydrobiidae Stimpson, 1865
           02 Family Viviparidae Gray, 1847 (1833)
           03 Family Littorinidae Children, 1834 - periwinkles
           04 Family Turritellidae Lovén, 1847 - turret snails
           05 Family Caecidae Gray, 1850 - caecids
           06 Family Vermetidae Rafinesque, 1815 - worm snails
           07 Family Cerithiidae Fleming, 1822 - ceriths
           08 Family Potamididae Adams & Adams, 1854 - potamids
           09 Family Strombidae Rafinesque, 1815 - conchs
           10 Family Epitoniidae Berry, 1910 (1812) - wentletraps
           11 Family Janthinidae Lamarck, 1822 - violet snails
           12 Family Hipponicidae Troschel, 1861 - horse hoof limpits
           13 Family Capulidae Fleming, 1822 - cap snails
           14 Family Calyptraeidae Lamarck, 1809 - slipper snails and shelf limpets
           15 Family Carinariidae Blainville, 1818
           16 Family Naticidae Guilding, 1834 - moon snails
           17 Family Eratoidae T. Gill, 1871 - coffee bean shells see Tribe Eratoini Gill, 1871
           18 Family Cypraeidae Rafinesque, 1815 - cowries
           19 Family Ovulidae Fleming, 1822 - egg snails
           20 Family Tonnidae Suter, 1913 (1825) - tuns
           21 Family Cassididae Adams & Adams, 1853 - helmet shells
           22 Family Ficidae Meek, 1864 (1840) - fig snails