DiatomBase
Between brackets is the number of accepted extant species
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- Bacillariophyceae (5 958)
- Subclass Bacillariophyceae incertae sedis (189)
- Subclass Bacillariophycidae (4 408)
- Superorder Bacillariophycanae (4 083)
- Order Achnanthales (438)
- Order Bacillariales (357)
- Order Cymbellales (792)
- Order Dictyoneidales
- Order Lyrellales (15)
- Order Mastogloiales (88)
- Order Naviculales (2 077)
- Suborder Diploneidineae
- Suborder Naviculineae (12)
- Suborder Neidiineae (330)
- Suborder Phaeodactylineae
- Suborder Sellaphorineae
- Family Amphipleuraceae Grunow, 1862 (162)
- Family Diploneidaceae D. G. Mann, 1990 (116)
- Family Metascolioneidaceae S.Blanco & C.E.Wetzel, 2016 (2)
- Family Naviculaceae Kützing, 1844 (866)
- Family Naviculales incertae sedis (7)
- Family Pinnulariaceae D.G. Mann, 1990 (254)
- Family Pleurosigmataceae Mereschkowsky, 1903 (98)
- Genus Achnanthosigma L. Reinhard, 1882 accepted as Rhoicosigma A. Grunow, 1867
- Genus Arcuatasigma G.Reid, 2012 (7)
- Genus Carinasigma G.Reid, 2012 (3)
- Genus Cochlearisigma G.Reid, 2012 (5)
- Genus Costasigma G.Reid, 2012 (2)
- Genus Donkinia J. Ralfs in A. Pritchard, 1861 (1)
- Genus Gyrosigma A.H. Hassall, 1845 (33)
- Species Gyrosigma acuminatum (Kützing) Rabenhorst, 1853
- Species Gyrosigma aestuarii (Brébisson ex Kützing) Griffith & Henfrey, 1856 accepted as Navicula aestuarii Brébisson ex Kützing, 1849
- Species Gyrosigma aestuarium Kisselev, 1925
- Species Gyrosigma agellus (Ehrenberg) Rabenhorst, 1853 accepted as Navicula agellus Ehrenberg, 1840
- Species Gyrosigma algoris J.R.Carter, 1981
- Species Gyrosigma angulatum (Quekett) Griffith & Henfrey
- Species Gyrosigma angustum (Donkin) Cleve, 1894 accepted as Carinasigma angustatum (Donkin) G.Reid, 2012
- Species Gyrosigma apula Rabenhorst, 1853
- Species Gyrosigma arcticum (Cleve) Cleve, 1894
- Species Gyrosigma arcutum (Donkin) Sterrenburg in Jahn, R., Sterrenburg, F.A.S. & Kusber, W.-H. accepted as Pleurosigma arcuatum Donkin, 1857
- Species Gyrosigma attenuata (Kützing) Rabenhorst, 1853 accepted as Frustulia attenuata Kützing, 1834
- Species Gyrosigma attenuatum (Kützing) Rabenhorst, 1853
- Species Gyrosigma baculum W.E.Herwig & F.A.S.Sterrenburg, 2014
- Species Gyrosigma baicalense
- Species Gyrosigma baikalensis Skvortzov, 1937
- Species Gyrosigma baileyi (Grunow in Cleve & Grunow) Cleve, 1894 accepted as Pleurosigma baileyi Grunow in Cleve & Grunow, 1880
- Species Gyrosigma baltica
- Species Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853
- Species Gyrosigma beaufortianum Hustedt, 1955
- Species Gyrosigma bennettii (M. Peragallo in Tempère & Peragallo) Boyer, 1927 accepted as Pleurosigma bennettii M. Peragallo in Tempère & Peragallo, 1909
- Species Gyrosigma bhusavalensis Sarode & Kamat, 1984
- Species Gyrosigma bigibbum Zanon, 1949
- Species Gyrosigma caffra Giffen, 1963
- Species Gyrosigma calaritanum Zanon, 1948
- Species Gyrosigma cali G.Reid, 2003
- Species Gyrosigma centropunctatum Yuhang Li, Nagumo et Kuidong Xu in Li et al., 2020
- Species Gyrosigma closterioides (Grunow) G. Reid accepted as Pleurosigma prolongatum var. closterioides Grunow, 1884
- Species Gyrosigma coelophilum Okamoto & Nagumo, 2003
- Species Gyrosigma compactum (Greville) Cleve, 1894
- Species Gyrosigma concilians (Cleve) Okolodkov, 1989 accepted as Amphiprora concilians Cleve, 1896
- Species Gyrosigma constrictum Volkov, 1936
- Species Gyrosigma contortum Mereschkowsky, 1902
- Species Gyrosigma crassum Meister, 1934 (1935)
- Species Gyrosigma curvulum Rabenhorst, 1853
- Species Gyrosigma cuspidata Rabenhorst, 1853
- Species Gyrosigma decorum (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma decorum var. decorum W. Smith, 1853
- Species Gyrosigma delicatulum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma delicatulum var. delicatulum W. Smith, 1852
- Species Gyrosigma diaphanum Cleve, 1894
- Species Gyrosigma diminutum (Grunow & Grunow), 1894 accepted as Gyrosigma diminutum (W.Smith) Cleve
- Species Gyrosigma diminutum (W.Smith) Cleve
- Species Gyrosigma dissimilis Y. A. Mikishin, 1991
- Species Gyrosigma distortoides Manguin, 1952
- Species Gyrosigma distortum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma distortum var. distortum W. Smith, 1852
- Species Gyrosigma diversitatum Giffen, 1970
- Species Gyrosigma dongzhaiense Yuhang Li, Nagumo et Kuidong Xu in Li et al., 2020
- Species Gyrosigma dubia Rabenhorst, 1853
- Species Gyrosigma dubium Meister, 1934 (1935)
- Species Gyrosigma elegans Ricard, 1975
- Species Gyrosigma elongatum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma elongatum W.Smith, 1852
- Species Gyrosigma elongatum (W.Smith) G.S.West, 1909 accepted as Pleurosigma elongatum var. elongatum W. Smith, 1852
- Species Gyrosigma euhippus F.A.S.Sterrenburg & R.Ross, 1992
- Species Gyrosigma evanescens Cardinal, Poulin & Bérard-Therriault, 1986
- Species Gyrosigma excentricum Prowse, 1962
- Species Gyrosigma exilis (Grunow) C.W.Reimer, 1966 accepted as Pleurosigma spencerii var. exilis Grunow, 1880
- Species Gyrosigma eximium (Thwaites) Boyer, 1927 accepted as Schizonema eximium Thwaites, 1848
- Species Gyrosigma eximoides Rivera, 1974
- Species Gyrosigma exoticum Cholnoky, 1960
- Species Gyrosigma exoticumoides Negoro & Gotoh, 1983
- Species Gyrosigma fascicola Gordienko, 1931
- Species Gyrosigma fasciola (Ehrenberg) J.W.Griffith & Henfrey, 1856 accepted as Ceratoneis fasciola Ehrenberg, 1839
- Species Gyrosigma febigeri (Grunow in Cleve & Möller) Cleve, 1894 accepted as Pleurosigma febigeri Grunow in Cleve & Möller, 1879
- Species Gyrosigma fenestriata Meister, 1932
- Species Gyrosigma floweri G.Reid, 2008
- Species Gyrosigma fogedii Stidolph, 1994
- Species Gyrosigma foliaceum Pogrebnyak, 1960
- Species Gyrosigma fonticolum Hustedt, 1938
- Species Gyrosigma formosum (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma formosum var. formosum W. Smith, 1852
- Species Gyrosigma foxtonia Stidolph, 1988
- Species Gyrosigma gibbosum Ricard, 1975
- Species Gyrosigma gibbyae G.Reid, 2003
- Species Gyrosigma glaciale (Cleve) Cleve, 1894 accepted as Pleurosigma glaciale Cleve, 1883
- Species Gyrosigma gondwana Gerd Moser
- Species Gyrosigma grovei (Peragallo) Cleve, 1894 accepted as Pleurosigma grovesii Cleve ex H. Peragallo, 1891
- Species Gyrosigma gruendleri (Grunow in Cleve & Grunow) F.W. Mills, 1934 accepted as Pleurosigma gruendleri Grunow, 1880
- Species Gyrosigma hankensis Skvortzow, 1929
- Species Gyrosigma hassallii Rabenhorst, 1853
- Species Gyrosigma hippocampus (Ehrenberg) Hassall, 1845 accepted as Navicula hippocampus var. hippocampus Ehrenberg, 1838
- Species Gyrosigma hudsonii Poulin & Cardinal, 1982
- Species Gyrosigma hummii Hustedt, 1955
- Species Gyrosigma incompta Hohn & Hellerman, 1966
- Species Gyrosigma inflatum Ricard, 1975
- Species Gyrosigma intermedium (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma intermedium var. intermedium W. Smith, 1853
- Species Gyrosigma irregulare F.W. Mills, 1934
- Species Gyrosigma itaparicanum (Zimmermann) Andrade & Teixeira, 1957 accepted as Pleurosigma itaparicanum Zimmermann, 1918
- Species Gyrosigma itaparicanum (Zimmermann) Andrade & Teixeira, 1857 accepted as Pleurosigma itaparicanum Zimmermann, 1918
- Species Gyrosigma kazachstanicum N.I. Strelnikova & J.P. Kociolek in Strelnikova, Kociolek & Fourtanier, 2006
- Species Gyrosigma khandeshensis Sarode & Kamat, 1984
- Species Gyrosigma kolbei Skvortzow, 1971
- Species Gyrosigma kolbei Skvortzow, 1969
- Species Gyrosigma krammeri Kociolek, Graef & Lowe, 2010
- Species Gyrosigma kuetzingii (Grunow) Cleve, 1894 accepted as Pleurosigma kuetzingii f. kuetzingii Grunow, 1860
- Species Gyrosigma lacustre (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma lacustre W.Smith, 1852
- Species Gyrosigma lamprocampa Rabenhorst, 1853
- Species Gyrosigma lanceolatum Ricard, 1975
- Species Gyrosigma limosum Sterrenburg & Underwood, 1997
- Species Gyrosigma lineare
- Species Gyrosigma litorale (W. Smith) Cleve, 1894 accepted as Pleurosigma littorale var. littorale W. Smith, 1852
- Species Gyrosigma littorale (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma littorale var. littorale W. Smith, 1852
- Species Gyrosigma lucianum Cholnoky, 1968
- Species Gyrosigma macedonicum Z.Levkov, S.Krstic & T.Nakov, 2007
- Species Gyrosigma macrum (W.Smith) J.W.Griffith & Henfrey, 1856 accepted as Pleurosigma macrum W.Smith, 1853
- Species Gyrosigma maharashtrensis Sarode & Kamat, 1984
- Species Gyrosigma marginatum Voigt, 1969
- Species Gyrosigma mediterraneum Cleve, 1894
- Species Gyrosigma moresbyana Reichardt, 1988
- Species Gyrosigma murphyi G.Reid, 2003
- Species Gyrosigma naviculaceum (Brebisson) Griffith & Henfrey, 1875 accepted as Pleurosigma naviculaceum f. naviculaceum Brébisson, 1854
- Species Gyrosigma neglectum Frenguelli, 1938
- Species Gyrosigma nipkowii Meister, 1932
- Species Gyrosigma nipponica (Skvortzow) Skvortzow & Noda, 1971 accepted as Gyrosigma attenuatum var. nipponica Skvortzow, 1936
- Species Gyrosigma nodiferum (Grunow) Reimer, 1966 accepted as Pleurosigma nodiferum Grunow, 1880
- Species Gyrosigma normanii (Ralfs) Mann, 1907 accepted as Pleurosigma normanii Ralfs, 1861
- Species Gyrosigma nubecula Griffith & Henfrey, 1860
- Species Gyrosigma obliquum (Grunow) Boyer, 1927 accepted as Pleurosigma obliquum Grunow, 1880
- Species Gyrosigma obscurum (W.Smith) J.W.Griffith & Henfrey, 1856
- Species Gyrosigma obtusatum (Sullivant & Wormley) C.S.Boyer, 1922 accepted as Pleurosigma obtusatum W.S.Sullivant & Wormley, 1859
- Species Gyrosigma olhonensis G.Reid, 2008
- Species Gyrosigma orbitum Thaler et Kaczmarska, 2009
- Species Gyrosigma pallidum Riznyk, 1973
- Species Gyrosigma parkeri (Harrison) Elmore, 1921 accepted as Pleurosigma parkeri var. parkeri Harrison, 1860
- Species Gyrosigma parkerii (M.B.Harrison) Boyer, 1927 accepted as Gyrosigma wormleyi (Sullivant) Boyer, 1922
- Species Gyrosigma parvuloides Cholnoky, 1961
- Species Gyrosigma parvulum Hustedt, 1955
- Species Gyrosigma peisonis (Grunow) Hustedt, 1930 accepted as Pleurosigma peisonis var. peisonis Grunow, 1860
- Species Gyrosigma pensacolae Sterrenburg, 1995
- Species Gyrosigma perthense J.John, 1983
- Species Gyrosigma plagiostomum (Grunow) Cleve
- Species Gyrosigma procerum Hustedt, 1956
- Species Gyrosigma prolongatum (W.Smith) J.W.Griffith & Henfrey, 1856 accepted as Pleurosigma prolongatum var. prolongatum W. Smith, 1852
- Species Gyrosigma pseudokuetzingii Kobayasi in Kobayasi & Ando, 1977
- Species Gyrosigma quadratum (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma quadratum var. quadratum W. Smith, 1853
- Species Gyrosigma quinnipiacii (M.Peragallo) Boyer, 1927
- Species Gyrosigma rapsonii Cholnoky, 1959
- Species Gyrosigma rautenbachiae Cholnoky, 1957
- Species Gyrosigma rectum (Donkin) Cleve, 1894 accepted as Carinasigma rectum (Donkin) G.Reid, 2012
- Species Gyrosigma reimeri Sterrenburg, 1994
- Species Gyrosigma reversum (Gregory) Hendey, 1986 accepted as Pleurosigma reversum Gregory, 1857
- Species Gyrosigma reversum Ricard, 1975
- Species Gyrosigma rigidum (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma rigidum var. rigidum W. Smith, 1853
- Species Gyrosigma robustum (Grunow) Cleve, 1894
- Species Gyrosigma sagitta (Tempère & Brun in Brun & Tempère) Mann, 1907 accepted as Pleurosigma sagitta var. sagitta Tempère & Brun in Brun & Tempère, 1889
- Species Gyrosigma scalpellum Rabenhorst, 1853
- Species Gyrosigma scalproides (Rabenhorst) Cleve, 1894
- Species Gyrosigma scalprum (Gaillon) Sterrenburg, 2007 accepted as Navicula scalprum Gaillon, 1827
- Species Gyrosigma schmidianum Sterrenburg & M.A.Tiffany
- Species Gyrosigma sciotense (Sullivan & Wormley) Cleve, 1894 accepted as Pleurosigma sciotense Sullivant & Wormley, 1859
- Species Gyrosigma simile (Grunow) Boyer, 1916 accepted as Pleurosigma simile Grunow, 1880
- Species Gyrosigma simile (Grunow) Cleve, 1901 accepted as Pleurosigma simile Grunow, 1880
- Species Gyrosigma sinensis (Ehrenberg) Desikachary, 1988 accepted as Navicula sinensis Ehrenberg, 1847
- Species Gyrosigma skvortzovii G.Reid, 2008
- Species Gyrosigma spathulatum Ricard, 1975 accepted as Arcuatasigma spathulatum (Ricard) Lobban & G. Reid, 2018
- Species Gyrosigma speciosum (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma speciosum var. speciosum W. Smith, 1852
- Species Gyrosigma spectabile (Grunow) Cleve, 1894
- Species Gyrosigma spenceri (W.Smith) Griffith & Henfrey, 1856 accepted as Gyrosigma acuminatum (Kützing) Rabenhorst, 1853
- Species Gyrosigma spencerii (Bailey ex Quekett) Griffith & Henfrey, 1856 accepted as Gyrosigma acuminatum (Kützing) Rabenhorst, 1853
- Species Gyrosigma spencerii Cleve, 1895
- Species Gyrosigma spenserii
- Species Gyrosigma sterrenburgii Stidolph, 1992
- Species Gyrosigma stidolphii Sterrenburg, 1992
- Species Gyrosigma stompsii Cholnoky, 1963
- Species Gyrosigma strigilis (W.Smith) J.W.Griffin & Henfrey, 1856 accepted as Pleurosigma strigilis f. strigilis W. Smith, 1852
- Species Gyrosigma strigosum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma strigosum var. strigosum W. Smith, 1852
- Species Gyrosigma stuxbergii
- Species Gyrosigma subangustum Hustedt, 1955
- Species Gyrosigma subsalina (H.Peragallo) Frenguelli & Orlando, 1958
- Species Gyrosigma subsalinum Peragallo
- Species Gyrosigma subsalsum (Wislouch & Kolbe) Cardinal, Poulin & Berard-Therriault, 1986 accepted as Pleurosigma subsalsum Wislouch & Kolbe, 1916
- Species Gyrosigma sulcatum (Grunow in Cleve & Grunow) Frenguelli, 1938 accepted as Pleurosigma fasciolum var. sulcatum Grunow in Cleve & Grunow, 1880
- Species Gyrosigma sulcatum (Grunow) Heiden in Heiden & Kolbe, 1928 accepted as Pleurosigma sulcatum var. sulcatum Grunow in Cleve & Grunow, 1880
- Species Gyrosigma surirella Pervolf, 1953
- Species Gyrosigma temperei Cleve, 1893
- Species Gyrosigma tenuirostrum (Grunow) Cleve-Euler, 1952
- Species Gyrosigma tenuissimum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma tenuissimum var. tenuissimum W. Smith, 1853
- Species Gyrosigma terryanum (Peragallo) Cleve, 1894 accepted as Pleurosigma terryanum H.Peragallo, 1891
- Species Gyrosigma thuringica (Kützing) Rabenhorst, 1853 accepted as Navicula thuringica Kützing, 1844
- Species Gyrosigma transversale (W. Smith) Griffith & Henfrey, 1860 accepted as Pleurosigma transversale var. transversale W. Smith, 1856
- Species Gyrosigma tubicolum F.A.S.Sterrenburg & M.A.Tiffany, 2004
- Species Gyrosigma turgida (Stidolph) Stidolph, 1988
- Species Gyrosigma turgidum (Stidolph) Stidolph, 1988
- Species Gyrosigma uncinatum Ricard, 1975
- Species Gyrosigma variipunctatum Hagelstein, 1939
- Species Gyrosigma variistriatum Hagelstein, 1939
- Species Gyrosigma virgata (Roper) Grunow, 1877
- Species Gyrosigma vivax (W.Smith) M.Peragallo, 1908
- Species Gyrosigma waitangiana Stidolph, 1993
- Species Gyrosigma wansbeckii (Donkin) Cleve, 1894
- Species Gyrosigma wormleyi (Sullivant) Boyer, 1922 accepted as Pleurosigma wormleyi W.S.Sullivant, 1859
- Species Gyrosigma xiamenense Bing Liu, F.A.S. Sterrenburg & Bangqin Huang, 2015
- Genus Hyalosigma N.I. Strelnikova & J.P. Kociolek in Strelnikova, Kociolek & Fourtanier, 2006 †
- Genus Pleurosigma W. Smith, 1852 (38)
- Genus Rhoicosigma A. Grunow, 1867 (4)
- Genus Toxonidea A.S. Donkin, 1858 (3)
- Genus Toxonidisigma Lobban & G. Reid, 2018 (2)
- Family Scolioneidaceae
- Family Scoliotropidaceae Mersechk. (6)
- Family Sellaphoraceae Mereschkowsky, 1902 (74)
- Family Stauroneidaceae D.G. Mann, 1990 (150)
- Order Rhopalodiales (37)
- Order Surirellales (174)
- Order Thalassiophysales (105)
- Superorder Bacillariophycidae incertae sedis (32)
- Superorder Eunotiophycanae (293)
- Subclass Coscinodiscophycidae (878)
- Subclass Fragilariophycidae (483)
- Order Centrales
