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 Iravadiidae Thiele, 1928
             Genus Iravadia Blanford, 1867
               1 Subgenus Fluviocingula Kuroda & Habe, 1954
               2 Subgenus Pseudomerelina Ponder, 1984 see Genus Pseudomerelina Ponder, 1984
               3 Subgenus Pseudonoba Boettger, 1902