Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
         Suborder Architaenioglossa Haller, 1890
           Superfamily Cerithioidea Fleming, 1822
             Family Potamididae Adams & Adams, 1854 - potamids
               Subfamily Potamidinae Adams & Adams, 1854 see Family Potamididae Adams & Adams, 1854
                 Genus Exechestoma Cossmann, 1889, nom. illeg.