Achnanthes Bory de Saint-Vincent, 1822 (extant flag source)
Actinoptychus Ehrenberg, 1843 (extant flag source)
Anaulus Ehrenberg, 1844 (extant flag source)
Arachnoidiscus H. Deane ex G. Shadbolt, 1852 (extant flag source)
Asteromphalus Ehrenberg, 1844 (extant flag source)
Aulacodiscus C.G. Ehrenberg, 1844 (extant flag source)
Auliscus Ehrenberg, 1843 (extant flag source)
Biddulphia S.F. Gray, 1821 (extant flag source)
Chaetoceros Ehrenberg, 1844 (extant flag source)
Coscinodiscus Ehrenberg, 1839 (extant flag source)
Craspedodiscus Ehrenberg, 1844 † (extant flag source)
Cyclotella (Kützing) Brébisson, 1838 (extant flag source)
Cymatosira Grunow, 1862 (extant flag source)
Cymbella C.A. Agardh, 1830 (extant flag source)
Diploneis Ehrenberg ex Cleve, 1894 (extant flag source)
Endictya Ehrenberg, 1845 (extant flag source)
Eunotogramma J.F. Weisse, 1855 (extant flag source)
Fragilaria Lyngbye, 1819 (extant flag source)
Gladius Forti & Schulz, 1932 † (extant flag source)
Hemiaulus Ehrenberg, 1844 accepted as Eucampia Ehrenberg, 1839 (extant flag source)
Kittonia E. Grove & G. Sturt, 1887 † (extant flag source)
Lithodesmium Ehrenberg, 1839 (extant flag source)
Melosira C.A. Agardh, 1824 (extant flag source)
Nitzschia Hassall, 1845 (extant flag source)
Paralia Heiberg, 1863 (extant flag source)
Pleurosigma W. Smith, 1852 (extant flag source)
Podosira Ehrenberg, 1840 (extant flag source)
Proboscia Sundström, 1986 (extant flag source)
Pyxilla Greville, 1865 (extant flag source)
Raphidodiscus H.L. Smith ex T. Christian, 1887 † (extant flag source)
Rhaphoneis Ehrenberg, 1844 (extant flag source)
Rutilaria Greville, 1863 (extant flag source)
Sceptroneis Ehrenberg, 1844 (extant flag source)
Sphynctolethus Hanna, 1927 † (extant flag source)
Stellarima G.R. Hasle & P.A. Sims, 1986 (extant flag source)
Stephanopyxis (Ehrenberg) Ehrenberg, 1845 (extant flag source)
Stephanopyxis C.G. Ehrenberg, 1844 accepted as Stephanopyxis (Ehrenberg) Ehrenberg, 1845 (extant flag source)
Stictodiscus Greville, 1861 † (extant flag source)
Synedra Ehrenberg, 1830 (extant flag source)
Synedrella F.E. Round & N.I. Maidana, 2001 accepted as Pseudostaurosira D.M. Williams & F.E. Round, 1988 (extant flag source)
Thalassionema (H. Peragallo & M. Peragallo) M. Peragallo, 1921 accepted as Thalassionema Grunow ex Mereschkowsky, 1902 (extant flag source)
Thalassiosira Cleve, 1873 (extant flag source)
Thalassiothrix Cleve & Grunow, 1880 (extant flag source)
Triceratium Ehrenberg, 1839 (extant flag source)
Trinacria Heiberg, 1863 † (extant flag source)