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
           01 Family Rissoidae Gray, 1847
           02 Family Adeorbidae Monterosato, 1884 [monotypic] see Subfamily Torninae Sacco, 1896 (1884)
           03 Family Barleeidae orth. inval. see Family Barleeiidae Gray, 1857
           04 Family Anabathridae Keen, 1971
           05 Family Caecidae Gray, 1850 - caecids
           06 Family Elachisinidae Ponder, 1985
           07 Family Assimineidae Adams & Adams, 1856
           08 Family Hydrobiidae Stimpson, 1865
           09 Family Iravadiidae Thiele, 1928
           10 Family Bithyniidae Gray, 1857
           11 Family Hydrococcidae Thiele, 1928 [monotypic]
           12 Family Pomatiopsidae Stimpson, 1865
           13 Family Stenothyridae Tryon, 1866
           14 Family Falsicingulidae Slavoshevskaya, 1975 [monotypic]
           15 Family Baicaliidae Fischer, 1885 see Subfamily Baicaliinae Fischer, 1885
           16 Family Benedictiidae Clessin, 1880 see Subfamily Benedictiinae Clessin, 1880
           17 Family Micromelaniidae Dybowski & Grochmalicki, 1914 see Subfamily Pyrgulinae Brusina, 1882 (1869)
           18 Family Emblandidae Ponder, 1985 [monotypic]
           19 Family Epigridae Ponder, 1985 [monotypic]
           20 Family Pendromidae Warén, 1991 [monotypic]
           21 Family Ctiloceratidae Iredale & Laseron, 1957 see Subfamily Ctiloceratinae Iredale & Laseron, 1957
           22 Family Vitrinellidae Bush, 1897 see Subfamily Vitrinellinae Bush, 1897
           23 Family Tornidae Sacco, 1896 (1884)
           24 Family Rastodentidae Ponder, 1966
           25 Family Poteriidae Thiele, 1929 see Subfamily Neocyclotinae Kobelt & Möllendorff, 1897
           26 Family Megalomastomidae Blanford, 1864 see Family Megalomastomatidae Blanford, 1864