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)
- Superorder Bacillariophycidae incertae sedis (32)
- Order Rhaponeidales (18)
- Genus Biblarium C.G. Ehrenberg, 1843
- Genus Charcotia M. Peragallo, 1921 accepted as Charcotiella S. Blanco & C.E. Wetzel, 2016
- Genus Colletonema A. de Brébisson ex F.T. Kützing, 1849
- Genus Coscinodiscopsis Sar & Sunesen, 2008 (2)
- Genus Cresswellia Arnott ex R.K. Greville in W. Gregory, 1857 (1)
- Genus Cystopleura A. de Brébisson ex O. Kuntze, 1891
- Genus Denticella C.G. Ehrenberg, 1838
- Genus Exilaria R.K. Greville, 1827 accepted as Licmophora C.A. Agardh, 1827
- Genus Florella J.N. Navarro, 1982
- Genus Huttoniella G. Karsten, 1928
- Genus Medlinella Frankovich, Ashworth & M.J. Sullivan, 2016 (1)
- Genus Micromega C.A. Agardh, 1827 (1)
- Species Micromega agardhii (Ehrenberg; Ehrenberg) Ralfs in Pritchard, 1861 accepted as Schizonema agardhi Ehrenberg, 1835
- Species Micromega albicans Kützing, 1844
- Species Micromega apiculatum (Greville) C.Agardh accepted as Schizonema apiculatum var. apiculatum Agardh, 1824
- Species Micromega apiculatum Kützing, 1844
- Species Micromega aureum Kützing, 1844
- Species Micromega berkeleyi Kützing, 1849
- Species Micromega blyttii Agardh, 1830
- Species Micromega bombycinum Kützing, 1844
- Species Micromega bryopsis (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema bryopsis Kützing, 1844
- Species Micromega capitatum (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema capitatum Kützing, 1844
- Species Micromega chondroides Kützing, 1844
- Species Micromega comoides (Greville) Ralfs in Pritchard, 1861 accepted as Berkeleya rutilans var. comoides Grunow, 1880
- Species Micromega corinaldi (Meneghini) Ralfs in Pritchard, 1861 accepted as Schizonema corinaldi Meneghini, 1845
- Species Micromega corniculatum C.Agardh, 1827
- Species Micromega corymbosum (Agardh) Kützing, 1844 accepted as Schizonema corymbosum var. corymbosum Agardh, 1824
- Species Micromega crispum (Montagne) Ralfs in Pritchard, 1861 accepted as Schizonema crispum Montagne, 1842
- Species Micromega divaricatum Meneghini ex Kutzing, 1844
- Species Micromega divergens (W. Smith) Ralfs in Pritchard, 1861 accepted as Schizonema divergens W. Smith, 1856
- Species Micromega fastigatum Kützing, 1849
- Species Micromega flagelliferum Kützing, 1844
- Species Micromega floccosum Kützing, 1844
- Species Micromega gracillimum (W. Smith) Ralfs in Pritchard, 1861 accepted as Schizonema gracillimum W. Smith, 1856
- Species Micromega gracillimum (W. Smith) Crouan frat., 1861 accepted as Schizonema gracillimum W. Smith, 1856
- Species Micromega grandinosum Suhr, 1840
- Species Micromega helminthosum (Chauvin ex Agardh) Ralfs in Pritchard, 1861 accepted as Schizonema helmintosum var. helmintosum Chauvin ex Duby, 1830
- Species Micromega humile (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema humile Kützing, 1844
- Species Micromega hyalinum Kützing, 1844
- Species Micromega hyalopus Kützing, 1844
- Species Micromega hydruroides (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema hydruroides Kützing, 1844
- Species Micromega illyricum (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema illyricum Kützing, 1844
- Species Micromega intricatum Kützing, 1844
- Species Micromega investens (Montagne) Ralfs in Pritchard, 1861 accepted as Schizonema investiens Montagne, 1842
- Species Micromega jadrense Meneghini ex Grunow, 1880
- Species Micromega kuetzingii Ralfs in Pritchard, 1861
- Species Micromega laciniatum (Harvey) Ralfs in Pritchard, 1861 accepted as Schizonema laciniatum Harv., 1841
- Species Micromega lineatum Kützing, 1844
- Species Micromega medusinum Kützing, 1844
- Species Micromega meneghinii Ralfs in Pritchard, 1861
- Species Micromega mesogloeoides (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema mesogloeoides Kützing, 1849
- Species Micromega minutum (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema minutum var. minutum Kützing, 1844
- Species Micromega molle (W. Smith) Ralfs in Pritchard, 1861 accepted as Schizonema molle f. molle W. Smith, 1856
- Species Micromega molle (W. Smith) Crouan frat., 1861 accepted as Schizonema molle f. molle W. Smith, 1856
- Species Micromega mucosum (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema mucosum Kützing, 1844
- Species Micromega myxacanthum Kützing, 1844
- Species Micromega nebulosum (Meneghini) Ralfs in Pritchard, 1861
- Species Micromega obtusum Ralfs
- Species Micromega pallidum C.Agardh, 1827
- Species Micromega papillosum (Meneghini) Ralfs in Pritchard, 1861 accepted as Schizonema papillosum Meneghini, 1845
- Species Micromega parasiticum (Griffith in Harvey) Kützing, 1844 accepted as Schizonema parasiticum var. parasiticum Griffith in Harvey, 1841
- Species Micromega parasiticum (Griffiths in Harvey) Ralfs in Pritchard, 1861 accepted as Schizonema parasiticum var. parasiticum Griffith in Harvey, 1841
- Species Micromega parvum (Meneghini in Kutzing) Ralfs in Pritchard, 1861 accepted as Schizonema parvum Meneghini ex Kutzing, 1849
- Species Micromega patens Kützing, 1844
- Species Micromega penicillatum (Chauvin, according to Agardh) Agardh, 1830 accepted as Schizonema penicillatum Chauvin ex Agardh, 1830
- Species Micromega plumosum (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema plumosum Kützing, 1844
- Species Micromega polyclados Kützing, 1844
- Species Micromega ramosissimum (Agardh) Agardh, 1830 accepted as Schizonema ramosissimum f. ramosissimum Agardh, 1824
- Species Micromega ramulosum Rabenhorst, 1847
- Species Micromega setaceum Kützing, 1844
- Species Micromega sirospermum Kützing
- Species Micromega sirospermum Kützing, 1849
- Species Micromega smithii (C.Agardh) Ralfs, 1861 accepted as Schizonema smithii var. smithii Agardh, 1824
- Species Micromega spinescens Kützing, 1844
- Species Micromega stalianum (Meneghini) Kützing, 1849 accepted as Schizonema stalianum Meneghini, 1845
- Species Micromega stewartii Dickie
- Species Micromega tenellum Kützing, 1844
- Species Micromega torquatum (Harvey) Ralfs in Pritchard, 1861 accepted as Schizonema smithii var. torquatum Harvey, 1841
- Species Micromega torquatum (Kützing) Crouan frat., 1861 accepted as Micromega setaceum var. torquatum (Harvey) Kützing, 1849
- Species Micromega trichocephalum (Kützing) Ralfs in Pritchard, 1861 accepted as Schizonema trichocephalum Kützing, 1844
- Species Micromega wyattii (Harvey) Ralfs in Pritchard, 1861 accepted as Schizonema wyattii Harvey, 1841
- Species Micromega zanardinii (Meneghini) Ralfs in Pritchard, 1861 accepted as Schizonema zanardinii var. zanardinii Meneghini, 1845
- Genus Micropodiscus A. Grunow in H. Van Heurck, 1885 accepted as Conticribra K. Stachura-Suchoples & D.M. Williams, 2009
- Genus Monoceros A.C.J. Van Goor, 1924
- Genus Odontidium F.T. Kützing, 1844 (5)
- Genus Okedenia T. Eulenstein ex G.B. De Toni, 1891 (1)
- Genus Orthoneis Grunow, 1870 (1)
- Genus Phaeoceros
- Genus Pleurostauron (1)
- Genus Rouxia J. Brun & J. Heribaud in J. Heribaud, 1893 †
- Genus Sphenella F.T. Kützing, 1844
- Genus Sphenella (Kützing) L. Agassiz, 1843
- Genus Spinigera H. Heiden & R.W. Kolbe, 1928
- Genus Syndendrium C.G. Ehrenberg, 1845 †
- Genus Syringidium C.G. Ehrenberg, 1845
- Genus Terebraria R.K. Greville, 1864 †
- Genus Tetragramma C.G. Ehrenberg, 1843
- Genus Zygoceros C.G. Ehrenberg, 1839 (1)
- Superorder Eunotiophycanae (293)
- Subclass Coscinodiscophycidae (878)
- Subclass Fragilariophycidae (483)
- Order Centrales
