DiatomBase

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Between brackets is the number of accepted extant species

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2 Shows the number of accepted extant species within the taxon

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Bacillariophyceae (5 957)
Subclass Bacillariophyceae incertae sedis (189)
Subclass Bacillariophycidae (4 408)
Superorder Bacillariophycanae (4 083)
Order Achnanthales (438)
Order Bacillariales (357)
Family Bacillariaceae Ehrenberg, 1831 (352)
Genus Allonitzschia A. Mann, 1925
Genus Alveus I. Kaczmarska & G.A. Fryxell, 1996
Genus Bacillaria J.F. Gmelin, 1788 (3)
Genus Cylindrotheca L. Rabenhorst, 1859 (2)
Genus Cymatonitzschia R. Simonsen, 1974
Genus Cymbellonitzschia F. Hustedt in A. Schmidt et al., 1924 (1)
Genus Denticula F.T. Kützing, 1844 (6)
Genus Denticulopsis R. Simonsen, 1979 (1)
Genus Fragilariopsis F. Hustedt in A. Schmidt et al., 1913 (6)
Genus Gomphonitzschia A. Grunow, 1868 (1)
Genus Gomphotheca N.I. Hendey & P.A. Sims, 1982
Species Gomphotheca clevei (Grunow) Hendey & Sims, 1982 accepted as Gomphonitzschia clevei Grunow, 1880
Species Gomphotheca sinensis (Skvortzov) N.I.Hendey & P.A.Sims, 1977 accepted as Nitzschia chinensis Skvortzow, 1932
Genus Hantzschia A. Grunow, 1877 (28)
Genus Neodenticula Akiba & Yanagisawa, 1986 †
Genus Nitschia
Genus Nitzschia A.H. Hassall, 1845 (241)
Genus Nitzschiella L. Rabenhorst, 1864
Genus Ophidocampa C.G. Ehrenberg, 1870
Genus Perrya F. Kitton, 1874 †
Genus Psammodictyon D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (3)
Genus Pseudoeunotia accepted as Pseudo-eunotia A. Grunow in H. Van Heurck, 1881
Genus Pseudo-nitschia accepted as Pseudo-nitzschia H. Peragallo in H. Peragallo & M. Peragallo, 1900
Genus Pseudonitzschia accepted as Pseudo-nitzschia H. Peragallo in H. Peragallo & M. Peragallo, 1900 (1)
Genus Pseudo-nitzschia H. Peragallo in H. Peragallo & M. Peragallo, 1900 (48)
Genus Simonsenia H. Lange-Bertalot, 1979 (2)
Genus Tryblionella W. Smith, 1853 (9)
Family Bacillariales incertae sedis (5)
Family Nitzschiaceae accepted as Bacillariaceae Ehrenberg, 1831
Order Cymbellales (792)
Order Dictyoneidales
Order Lyrellales (15)
Order Mastogloiales (88)
Order Naviculales (2 077)
Order Rhopalodiales (37)
Order Surirellales (174)
Order Thalassiophysales (105)
Superorder Bacillariophycidae incertae sedis (32)
Superorder Eunotiophycanae (293)
Subclass Coscinodiscophycidae (877)
Subclass Fragilariophycidae (483)
Order Centrales