Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
       Clade Sorbeoconcha Ponder & Lindberg, 1997 see Order Sorbeoconcha Ponder & Lindberg, 1997
         Clade Hypsogastropoda Ponder & Lindberg, 1997 see Suborder Hypsogastropoda Ponder & Lindberg, 1997
           Clade Littorinimorpha Pchelintsev, 1963 see Infraorder Littorinimorpha Pchelintsev, 1963
             Superfamily Rissooidea Gray, 1847
               Family Hydrobiidae Stimpson, 1865
                 1 Subfamily Hydrobiinae Stimpson, 1865
                 2 Subfamily Belgrandiinae de Stefani, 1877
                 3 Subfamily Clenchiellinae Taylor, 1966
                 4 Subfamily Islamiinae Radoman, 1973
                 5 Subfamily Nymphophilinae Taylor, 1966
                 6 Subfamily Pseudamnicolinae Radoman, 1977
                 7 Subfamily Pyrgulinae Brusina, 1882 (1869)
                 8 Subfamily Tateinae Thiele, 1925