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
         Superfamily Rissooidea Gray, 1847
           Family Barleeidae orth. inval. see Family Barleeiidae Gray, 1857
             Subfamily Teinostomatinae Cossmann, 1917 [monotypic]
               Genus Teinostoma Adams & Adams, 1853
                 Subgenus Esmeralda Pilsbry & Olsson, 1952, nom. illeg.