Abas R. Ross & P.A. Sims, 1980 † (extant flag source)
Abas R. Ross & P.A. Sims, 1980 † (basis of record)
Acanthoceros accepted as Acanthoceras H. Honigmann, 1909 (extant flag source)
Acanthoceros accepted as Acanthoceras H. Honigmann, 1909 (basis of record)
Achnanthes Bory de Saint-Vincent, 1822 (basis of record)
Achnanthidium Kützing, 1844 (basis of record)
Achnanthidium Kützing, 1844 (extant flag source)
Actinella F.W. Lewis, 1864 (basis of record)
Actinella F.W. Lewis, 1864 (extant flag source)
Actinocyclus Ehrenberg, 1837 (basis of record)
Actinocyclus Ehrenberg, 1837 (extant flag source)
Actinoptychus Ehrenberg, 1843 (basis of record)
Ailuretta P.A. Sims, 1986 † (basis of record)
Ailuretta P.A. Sims, 1986 † (extant flag source)
Amphipleura Kützing, 1844 (extant flag source)
Amphipleura Kützing, 1844 (basis of record)
Amphitetras Ehrenberg, 1840 (extant flag source)
Amphitetras Ehrenberg, 1840 (basis of record)
Amphora Ehrenberg ex Kützing, 1844 (extant flag source)
Amphora Ehrenberg ex Kützing, 1844 (basis of record)
Anaulus Ehrenberg, 1844 (basis of record)
Aneumastus D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Aneumastus D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (extant flag source)
Anomoeoneis E. Pfitzer, 1871 (extant flag source)
Anomoeoneis E. Pfitzer, 1871 (basis of record)
Anorthoneis Grunow, 1868 (extant flag source)
Anorthoneis Grunow, 1868 (basis of record)
Arachnoidiscus H. Deane ex G. Shadbolt, 1852 (basis of record)
Arcocellulus G.R. Hasle, H.A. von Stosch & E.E. Syvertsen, 1983 (extant flag source)
Arcocellulus G.R. Hasle, H.A. von Stosch & E.E. Syvertsen, 1983 (basis of record)
Ardissonea De Notaris, 1870 (extant flag source)
Ardissonea De Notaris, 1870 (basis of record)
Asterionella Hassall, 1850 (basis of record)
Asterionella Hassall, 1850 (extant flag source)
Asterionellopsis F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (extant flag source)
Asterionellopsis F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Asterolampra Ehrenberg, 1844 (basis of record)
Asterolampra Ehrenberg, 1844 (extant flag source)
Asteromphalus Ehrenberg, 1844 (basis of record)
Attheya T. West, 1860 (basis of record)
Attheya T. West, 1860 (extant flag source)
Aulacodiscus C.G. Ehrenberg, 1844 (basis of record)
Aulacoseira Thwaites, 1848 (extant flag source)
Aulacoseira Thwaites, 1848 (basis of record)
Auliscus Ehrenberg, 1843 (basis of record)
Auricula Castracane, 1873 (basis of record)
Auricula Castracane, 1873 (extant flag source)
Azpeitia M. Peragallo in Tempère & H. Peragallo, 1912 (extant flag source)
Azpeitia M. Peragallo in Tempère & H. Peragallo, 1912 (basis of record)
Bacillaria J.F. Gmelin, 1791 (extant flag source)
Bacillaria J.F. Gmelin, 1791 (basis of record)
Bacteriastrum Shadbolt, 1854 (extant flag source)
Bacteriastrum Shadbolt, 1854 (basis of record)
Bacteriosira H.H. Gran, 1900 accepted as Bacterosira Gran, 1900 (extant flag source)
Bacteriosira H.H. Gran, 1900 accepted as Bacterosira Gran, 1900 (basis of record)
Baxteriopsis G. Karsten in Engler & Prantl, 1928 † (basis of record)
Baxteriopsis G. Karsten in Engler & Prantl, 1928 † (extant flag source)
Bellerochea Van Heurck, 1885 (extant flag source)
Bellerochea Van Heurck, 1885 (basis of record)
Bennettella R.W. Holmes, 1985 (basis of record)
Bennettella R.W. Holmes, 1985 (extant flag source)
Berkeleya Greville, 1827 (extant flag source)
Berkeleya Greville, 1827 (basis of record)
Biddulphia S.F. Gray, 1821 (basis of record)
Biddulphiopsis H.A. von Stosch & R. Simonsen, 1984 (extant flag source)
Biddulphiopsis H.A. von Stosch & R. Simonsen, 1984 (basis of record)
Biremis D.G. Mann & E.J. Cox in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Biremis D.G. Mann & E.J. Cox in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (extant flag source)
Bleakeleya F.E. Round in Round et al., 1990 (basis of record)
Bleakeleya F.E. Round in Round et al., 1990 (extant flag source)
Brachysira Kützing, 1836 (basis of record)
Brachysira Kützing, 1836 (extant flag source)
Brebissonia Grunow, 1860 (basis of record)
Brebissonia Grunow, 1860 (extant flag source)
Briggera R. Ross & P.A. Sims, 1985 † (extant flag source)
Briggera R. Ross & P.A. Sims, 1985 † (basis of record)
Brightwellia Ralfs in Pritchard, 1861 † (extant flag source)
Brightwellia Ralfs in Pritchard, 1861 † (basis of record)
Brockmanniella Hasle, Stosch & Syvertsen, 1983 (extant flag source)
Brockmanniella Hasle, Stosch & Syvertsen, 1983 (basis of record)
Campylodiscus Ehrenberg ex Kützing, 1844 (extant flag source)
Campylodiscus Ehrenberg ex Kützing, 1844 (basis of record)
Campyloneis Grunow, 1862 (extant flag source)
Campyloneis Grunow, 1862 (basis of record)
Campylopyxis L.K. Medlin, 1985 (extant flag source)
Campylopyxis L.K. Medlin, 1985 (basis of record)
Campylosira Grunow ex Van Heurck, 1885 (extant flag source)
Campylosira Grunow ex Van Heurck, 1885 (basis of record)
Caponea A.C. Podzorski, 1984 (extant flag source)
Caponea A.C. Podzorski, 1984 (basis of record)
Catacombas D.M. Williams & F.E. Round, 1986 accepted as Synedra Ehrenberg, 1830 (extant flag source)
Catacombas D.M. Williams & F.E. Round, 1986 accepted as Synedra Ehrenberg, 1830 (basis of record)
Catenula Mereschkowsky, 1903 (extant flag source)
Catenula Mereschkowsky, 1903 (basis of record)
Cavinula D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Cavinula D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (extant flag source)
Centronella M. Voigt, 1902 (basis of record)
Centronella M. Voigt, 1902 (extant flag source)
Cerataulina H. Peragallo ex F. Schütt in Engler & Prantl, 1896 (basis of record)
Cerataulina H. Peragallo ex F. Schütt in Engler & Prantl, 1896 (extant flag source)