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 Bithyniidae Gray, 1857
             Genus Gabbia Tryon, 1865
               1 Subgenus Emmericiopsis Thiele, 1928
               2 Subgenus Parabithynia Pilsbry, 1928
               3 Subgenus Sierraia Connolly, 1929