Class Gastropoda Cuvier, 1795 - snails and slugs
Count: -
   Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
  Count: -
     Order Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods
    Count: -
       Superfamily Rissoacea Gray, 1847 see Superfamily Rissooidea Gray, 1847
      Count: 2f;2g; †2s
         Family Rissoidae Gray, 1847
        Count: 1g; †1s
           Genus Rissoa Desmarest, 1814
          Count: †1s
             †Rissoa pakistanica F.E. Eames, 1952
            Count: -