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 Micromelaniidae Dybowski & Grochmalicki, 1914 see Subfamily Pyrgulinae Brusina, 1882 (1869)
             ?Subfamily Pyrgulinae Brusina, 1882 (1869)
               Genus Pyrgohydrobia Radoman, 1955