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 Hydrobiidae Stimpson, 1865
             Subfamily Amnicolinae Tryon, 1863
               1 Genus Amnicola Gould & Haldeman, 1840
               2 Genus Lyogyrus Gill, 1863