Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Heterobranchia Burmeister, 1837 [monotypic] see Superorder Heterobranchia Burmeister, 1837
       Order Heterostropha Fischer, 1885
         Superfamily Pyramidelloidea Gray, 1840
           Family Pyramidellidae Gray, 1840
             Subfamily Odostomiinae Casey, 1904
               Genus Odostomia Fleming, 1813
                 01 Subgenus Odostomia Fleming, 1813
                 02 Subgenus Besla Dall & Bartsch, 1904
                 03 Subgenus Boonea Robertson, 1978
                 04 Subgenus Cinctinga Millard, 1996, orth. inval. see Subgenus Cinctiuga Laseron, 1951
                 05 Subgenus Colpostomia Cossmann, 1921
                 06 Subgenus Egila Dall & Bartsch, 1904
                 07 Subgenus Eulimastoma Bartsch, 1916
                 08 Subgenus Evalina Dall & Bartsch, 1904
                 09 Subgenus Fargoa Bartsch, 1955
                 10 Subgenus Gumina Finlay, 1928
                 11 Subgenus Iolaea Adams, 1867 see Genus Iolaea Adams, 1867
                 12 Subgenus Ivara Dall & Bartsch, 1903
                 13 Subgenus Linopyrga Laws, 1941
                 14 Subgenus Macrodostomia Sacco, 1892
                 15 Subgenus Nesiodostomia Pilsbry, 1918
                 16 Subgenus Obexomia Laws, 1941
                 17 Subgenus Oopriamus Vaught, 1989, orth. inval. see Subgenus Oopyramis Thiele, 1930
                 18 Subgenus Parodostomia Laseron, 1959
                 19 Subgenus Salassia de Folin, 1870
                 20 Subgenus Salassiella Dall & Bartsch, 1909
                 21 Subgenus Sinustomia Cossmann, 1921
                 22 Subgenus Siogamaia Nomura, 1936
                 23 Subgenus Striodostomia Laws, 1940
                 24 Subgenus Turriodostomia Habe, 1961