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
             01 Subfamily Hydrobiinae Stimpson, 1865
             02 Subfamily Amnicolinae Tryon, 1863
             03 Subfamily Belgrandiellinae Radoman, 1983 see Subfamily Belgrandiinae de Stefani, 1877
             04 Subfamily Bythinellinae Kobelt, 1878 see Subfamily Amnicolinae Tryon, 1863
             05 Subfamily Cochliopinae Tryon, 1866
             06 Subfamily Fontigentinae Taylor, 1966 [monotypic] see Subfamily Emmericiinae Brusina, 1870, nom. protect.
             07 Subfamily Graecoanatolicinae Radoman, 1973 [monotypic] see Subfamily Belgrandiinae de Stefani, 1877
             08 Subfamily Horatiinae Taylor, 1966 see Subfamily Belgrandiinae de Stefani, 1877
             09 Subfamily Islamiinae Radoman, 1973
             10 Subfamily Lithoglyphinae Tryon, 1866
             11 ?Subfamily Lithoglyphulinae Radoman, 1973 see Subfamily Belgrandiinae de Stefani, 1877
             12 Subfamily Littoridininae Thiele, 1928
             13 Subfamily Nymphophilinae Taylor, 1966
             14 Subfamily Potamopyrginae Boeters, 1984 [monotypic] see Subfamily Tateinae Thiele, 1925
             15 Subfamily Pseudohoratiinae Radoman, 1973 see Subfamily Belgrandiinae de Stefani, 1877
             16 Subfamily Pyrgorientaliinae Radoman, 1977 see Subfamily Hydrobiinae Stimpson, 1865
             17 Subfamily Rehderiellinae Brandt, 1974 [monotypic] see Family Iravadiidae Thiele, 1928
             18 Subfamily Sadlerianinae Radoman, 1973 see Subfamily Belgrandiinae de Stefani, 1877
             19 Genus Akiyoshia Kuroda & Habe, 1954
             20 Genus Casiohydrobia Edwards, 1981, orth. inval. see Genus Caspiohydrobia Starobogatov, 1970, nom. dub.
             21 Genus Corrosella Boeters, 1970
             22 Genus Cilgia Schütt, 1968
             23 Genus Dabriana Radoman, 1974
             24 Genus Dalmatella Velkovrh, 1970
             25 Genus Onobops Thompson, 1968
             26 Genus Orygoceras Brusina, 1882
             27 Genus Pseudobythinella Liu & Zhang, 1979, nom. illeg.
             28 Genus Pseudoislamia Radoman, 1979
             29 Genus Schuettemmericia Schlickum, 1961
             30 Genus Strobeliella Cazzaniga, 1981, nom. illeg. see Genus Strobelitatea Cazzaniga, 2017
             31 Genus Wuconchona Kang Zaibin, 1983