DiatomBase
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- Bacillariophyceae (5 957)
- Subclass Bacillariophyceae incertae sedis (189)
- Subclass Bacillariophycidae (4 408)
- Subclass Coscinodiscophycidae (877)
- Superorder Biddulphianae (230)
- Superorder Chaetocerotanae (95)
- Superorder Corethranae (1)
- Superorder Coscinodiscanae (300)
- Superorder Cymatosirophycanae (10)
- Superorder Lithodesmiophycanae (7)
- Superorder Rhizosolenianae (37)
- Superorder Thalassiosiranae (192)
- Order Thalassiosirales (192)
- Family Lauderiaceae (Schütt) Lemmermann, 1899, sensu emend. (1)
- Family Skeletonemaceae Lebour, 1930, sensu emend. (2)
- Family Stephanodiscaceae Glezer & Makarova, 1986 (150)
- Genus Crateriportula R. Flower & H. Hakansson, 1994
- Genus Cribrionella Jovanovska, Cvetkoska, Tofilovska, Ognjanova-Rumenova & Levkov, 2016
- Genus Cyclocostis Paillès in Paillès et al., 2020 †
- Genus Cyclostephanos F.E. Round ex Theriot, Hakansson, Kociolek, Round & Stoermer, 1987 (5)
- Genus Cyclotella (F.T. Kützing) A. de Brébisson, 1838 (23)
- Species Cyclotella abnormis Cleve-Euler, 1915
- Species Cyclotella actinocyclus (Ehrenberg) Kützing, 1849 accepted as Pyxidicula actinocyclus Ehrenberg, 1844
- Species Cyclotella actinopleurata E. Clerici, 1907
- Species Cyclotella aegaea A.Economou-Amilli, 1987
- Species Cyclotella affinis Makarova & Genkal accepted as Cyclotella caspia var. affinis Proschkina-Lavrenko & Makarova in Makarova & Proschkina-Lavrenko, 1964
- Species Cyclotella affinis Grunow in Möller
- Species Cyclotella afrerensis Gasse, 1974
- Species Cyclotella africana Rabenhorst, 1855
- Species Cyclotella agassizensis Håkansson & Kling, 1994
- Species Cyclotella alchichicana Olivia, Lugo, Alocer & Cantoral-Uriza, 2006
- Species Cyclotella aliquantula Hohn & Hellermann, 1963
- Species Cyclotella ambigua Grunow, 1880
- Species Cyclotella americana Schmidt in Schmidt et al., 1900
- Species Cyclotella americana (Ehrenberg) Kützing, 1849 accepted as Discoplea americana Ehrenberg, 1844
- Species Cyclotella andancensis Ehrlich, 1967 accepted as Pantocsekiella andancensis (A. Ehrlich, 1967) K.T. Kiss, Ector & Ács, 2016
- Species Cyclotella andina E.Theriot, H.J.Carney & P.J.Richerson, 1985
- Species Cyclotella annulata Suringar, 1870
- Species Cyclotella anomala K.E. Lohman, 1957
- Species Cyclotella antigua W.Smith, 1853 accepted as Cyclotella antiqua W.Smith, 1853
- Species Cyclotella antiqua W.Smith, 1853 accepted as Lindavia antiqua (W.Smith) Nakov et al., 2015
- Species Cyclotella arctica Genkal & Kharitonov, 1996 accepted as Pantocsekiella arctica (Genkal & Kharitonov, 1996) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella arentii Kolbe, 1948
- Species Cyclotella areolata Hustedt, 1935
- Species Cyclotella armenica Loginova & Pirumova in Loginova, Aleshinskaya & Pirumova, 1990 accepted as Lindavia armenica (Loginova & Pirumova) Nakov et al., 2015
- Species Cyclotella asiatica Brun in Brun & Tempère, 1889
- Species Cyclotella asperula Marsson, 1901
- Species Cyclotella asterocostata Lin, Xie & Cai, 1985
- Species Cyclotella asterolampra Lauby, 1910
- Species Cyclotella astraea Kützing, 1849 accepted as Discoplea astraea Ehrenberg, 1844 †
- Species Cyclotella atlantica (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Discoplea atlantica Ehrenberg, 1854
- Species Cyclotella atmosphaerica Ralfs accepted as Discoplea atmosphaerica Ehrenberg, 1847
- Species Cyclotella atomoides Marvan in Kubicek, Marvan & Zelinka, 1958
- Species Cyclotella atomus Hustedt, 1937
- Species Cyclotella austriaca (M.Peragallo, Handmann & Schiedler) Hustedt, 1948 accepted as Handmannia austriaca f. austriaca M. Peragallo in Handmann, 1913
- Species Cyclotella azigzensis R.J.Flower, F.Gasse & H.Håkansson, 1990 accepted as Pantocsekiella azigzensis (Flower et al., 1990) K.T. Kiss & Ács, 2016
- Species Cyclotella bachmannii Meister, 1912
- Species Cyclotella baicalensis Skvortzov, 1927
- Species Cyclotella balatonis Pantocsek, 1901
- Species Cyclotella baltica (Grunow) H.Håkansson accepted as Cyclotella striata var. baltica Grunow in Van Heurck, 1882
- Species Cyclotella bastowii J.R.Carter, 1961 †
- Species Cyclotella bavarica Klee, Schmidt & Muller, 1993 accepted as Pantocsekiella bavarica (Klee, Rol. Schmidt & Jens Müller, 1993) K.T. Kiss &Ács, 2016
- Species Cyclotella bella Schmidt, 1874
- Species Cyclotella berguisensis Ehrlich, 1969
- Species Cyclotella bifacialis Jurilj, 1954
- Species Cyclotella bisymmetrica Loseva, 1983
- Species Cyclotella bituminosa Hustedt, 1952
- Species Cyclotella bodanica Eulenstein ex Grunow, 1878 accepted as Lindavia bodanica (Eulenstein ex Grunow) Nakov et al., 2015
- Species Cyclotella bomba Serieyssol, 1981
- Species Cyclotella calae Azpeitia, 1911
- Species Cyclotella californica Grunow ex Cleve & Möller, 1879
- Species Cyclotella cantalense (Héribaud) Mills, 1933 accepted as Cymbella cantalense Héribaud, 1908
- Species Cyclotella carconensis Eulenstein ms. Grunow, 1878
- Species Cyclotella caspia Grunow, 1878
- Species Cyclotella cassandrae Paillès & Sylvestre in Paillès et al., 2018 †
- Species Cyclotella castracanei Eulenstein ex Fricke in Schmidt et al., 1901
- Species Cyclotella castracanei Eulenstein ms in Rattray, 1890
- Species Cyclotella castracani Brun, 1891
- Species Cyclotella castracaniensis Eulenstein in H.L. Smith, 1874
- Species Cyclotella catenata (J.Brun) Bachmann, 1911 accepted as Melosira catenata Brun, 1895
- Species Cyclotella cavita Stoermer & Kreis, 1978
- Species Cyclotella cavitata Tofilovska, Cvetkoska, Jovanovska, Ognjanova–Rumenova & Levkov, 2016 †
- Species Cyclotella cesatii Castracane, 1866
- Species Cyclotella ceylonica Holsinger, 1955
- Species Cyclotella chaetoceras Lemmermann, 1900
- Species Cyclotella changhai J.-X. Xu & J.P. Kociolek in Xu et al., 2017
- Species Cyclotella chantaica Kuzmina & Genkal in Genkal & Kuzmina, 1989 accepted as Pantocsekiella chantaica (Kuzmina & Genkal, 1989) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella charetoni
- Species Cyclotella choctawhatcheeana Prasad, 1990
- Species Cyclotella cistula
- Species Cyclotella cleve-euleriana Palik, 1958
- Species Cyclotella cleve-euleriana Palik, 1958
- Species Cyclotella cocconeiformis (Cleve) Amossé, 1969 accepted as Campylodiscus cocconeiformis Cleve, 1883
- Species Cyclotella comensis Grunow in Van Heurck, 1882 accepted as Pantocsekiella comensis (Grunow in Van Heurck, 1882) K.T. Kiss & Ács, 2016
- Species Cyclotella comta (Ehrenberg) Kützing, 1849
- Species Cyclotella comta (K. Meyer) Skabichevskii, 1960 accepted as Cyclotella comta f. major Meyer, 1924
- Species Cyclotella comta (Schroter) Skabichevskii, 1960 accepted as Cyclotella comta var. quadrijuncta Schrot., 1896
- Species Cyclotella comta (Grunow) Skabichevskii, 1960 accepted as Cyclotella comta var. glabriuscula Grunow, 1882
- Species Cyclotella comta Skabichevskii, 1960
- Species Cyclotella comta Fricke in Schmidt et al., 1900
- Species Cyclotella comtaeformica G.K. Khursevich in Khursevich et al., 2001 † accepted as Lindavia comtaeformica (Khursevich) Nakov et al., 2015 †
- Species Cyclotella concentrica Meneghini, 1845
- Species Cyclotella convexa Bodeanu, 1976
- Species Cyclotella corona Mukhina, 1978
- Species Cyclotella coscinodiscus Kützing accepted as Discoplea coscinodiscus Ehrenberg, 1845
- Species Cyclotella costei Druart & Straub, 1988 accepted as Pantocsekiella costei (Druart & F. Straub, 1988) K.T. Kiss & Ács, 2016
- Species Cyclotella crassilineata Mann, 1925
- Species Cyclotella cretica John & Economou-Amilli, 1990 accepted as Pantocsekiella cretica (J. John & Economou–Amilli, 1990) K.T. Kiss & Ács, 2016
- Species Cyclotella cruciata Pantocsek, 1902
- Species Cyclotella crucigera Pantocsek, 1902
- Species Cyclotella cryptica Reimann, Lewin & Guillard, 1963
- Species Cyclotella cubiculata E.A.Sar, Sunesen & Lavigne
- Species Cyclotella curvistriata Chen & Zhu, 1985
- Species Cyclotella cyclopuncta Håkansson & J.R.Carter, 1990
- Species Cyclotella dahurica M. Kachaeva, 1973
- Species Cyclotella dallasiana W.Smith, 1856
- Species Cyclotella deceusteriana Van de Vijver & Dessein, 2018
- Species Cyclotella deflandrei Ehrlich, 1968
- Species Cyclotella delicatissima J.R.Carter, J.R.Carter & Bailey-Watts, 1981
- Species Cyclotella delicatula Hustedt, 1952 accepted as Pantocsekiella delicatula (Hustedt, 1952) K.T. Kiss & Ács, 2016
- Species Cyclotella delicatula Genkal, 1994
- Species Cyclotella dendochaera (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Discoplea dendrochaera Ehrenberg, 1848
- Species Cyclotella denticulata Kützing accepted as Discoplea denticulata Ehrenberg, 1844 (1845)
- Species Cyclotella desikacharyi A.K.S.K.Prasad, 2006
- Species Cyclotella discostelliformica J.P.Kociolek & G.K.Khursevich, 2013 †
- Species Cyclotella distincta G.K. Khursevich in Khursevich et al., 2001
- Species Cyclotella distinguenda Hustedt, 1928
- Species Cyclotella dives (Ehrenberg) Kützing, 1849 accepted as Actinoptychus dives (Ehrenberg) Ehrenberg
- Species Cyclotella dubia Fricke, 1900 accepted as Cyclostephanos dubius (Hustedt) Round, 1988
- Species Cyclotella dubia Hilse, 1861
- Species Cyclotella elentarii S. Alfinito & N. Tagliaventi, 2002
- Species Cyclotella elgeri Hustedt, 1952
- Species Cyclotella elliptica Brebisson ex W. Smith Collection
- Species Cyclotella elymaea Economou-Amilli, 1991 accepted as Pantocsekiella elymaea (Economou–Amilli, 1991) K.T. Kiss & Ács, 2016
- Species Cyclotella eriensis V.Houk, R.Klee & H.Tanaka, 2010 accepted as Lindavia eriensis (Houk, Klee & Tanaka) Nakov et al., 2015
- Species Cyclotella estonica Laugaste & Genkal in Genkal & Laugaste, 1985
- Species Cyclotella exigua Håkansson, 1996
- Species Cyclotella facetia Hohn & Hellerman, 1963
- Species Cyclotella ferrazae Cholnoky, 1968
- Species Cyclotella fimbriata Castracane, 1886
- Species Cyclotella flammea Pantocsek, 1912
- Species Cyclotella florida Voight, 1942
- Species Cyclotella fottii Hustedt, 1942 accepted as Lindavia fottii (Hustedt) Nakov et al., 2015
- Species Cyclotella fourtaniera Laslandes & Kociolek in Kociolek et al., 2014
- Species Cyclotella frigida Cleve-Euler, 1951
- Species Cyclotella furcigera Nygaard, 1956
- Species Cyclotella gamma Sovereign, 1963
- Species Cyclotella gigantea A.M. Edwards, 1905
- Species Cyclotella glabriuscula (Grunow) Håkansson, 1988 accepted as Cyclotella comta var. glabriuscula Grunow, 1882
- Species Cyclotella glomerata H.Bachmann, 1911
- Species Cyclotella gordonensis Kling & Hakansson, 1988 accepted as Pantocsekiella gordonensis (H.J. Kling & Håkansson, 1988) K.T. Kiss & Ács, 2016
- Species Cyclotella gothica Cleve-Euler, 1951
- Species Cyclotella gothica Cleve-Euler in Sundelin, 1917
- Species Cyclotella gracilis Nikiteeva & Likhoshway, 1994 accepted as Pantocsekiella gracilis (Nikiteeva & Likhoshway, 1994) K.T. Kiss & Ács, 2016
- Species Cyclotella gracillima Ermolaeva, 1959
- Species Cyclotella graeca (Kützing) Ralfs accepted as Lindavia graeca (Ehrenberg) Nakov et al., 2015
- Species Cyclotella granulata Kulumbaeva & Genkal in Genkal & Kulumbaeva, 1990 accepted as Pantocsekiella granulata (Kulumbaeva & Genkal in Genkal & Kulumbaeva, 1990) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella granulosa Grunow in Van Heurck, 1882
- Species Cyclotella grossestriata
- Species Cyclotella guignardii Héribaud, 1903
- Species Cyclotella hakanssoniae Wendker, 1991
- Species Cyclotella hannae Kanaya, 1957
- Species Cyclotella hannaites VanLandingham, 1968
- Species Cyclotella hauckii Grunow in Van Heurck, 1882
- Species Cyclotella hellae Chang & Steinberg, 1989
- Species Cyclotella helvetica Kubler in Forel, 1874
- Species Cyclotella hilseana Rabenhorst, 1864
- Species Cyclotella hinganica Skvortzov, 1976
- Species Cyclotella hinziae Houk, König & Klee, 2015
- Species Cyclotella hispalensis Fricke in Schmidt et al., 1900
- Species Cyclotella hispanica K.T.Kiss, E.Hegewald & ?.cs
- Species Cyclotella hongkongensis Skvortzov, 1975
- Species Cyclotella horstii S.Genkal & M.Kulikovskiy, 2012 accepted as Pantocsekiella horstii (Genkal & Kulikovskiy, 2012) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella hubeiana Chen & Zhu, 1985
- Species Cyclotella hustedtii Jurilj, 1954
- Species Cyclotella hyalina Colditz, 1914
- Species Cyclotella idahica G.K.Khursevich & J.P.Kociolek, 2013 †
- Species Cyclotella indistincta Bennett & Kociolek in Kociolek et al., 2014 accepted as Pantocsekiella indistincta (Benett & Kociolek in Kociolek et al., 2014) K.T. Kiss, Ector & Ács, 2016
- Species Cyclotella inmaculata Tamayo, 1908
- Species Cyclotella insolita Hagelstein, 1939
- Species Cyclotella iranica T.Nejadsattari, S.Kheiri, S.Spaulding & M.Edlund, 2013 accepted as Pantocsekiella iranica (Nejadsattari et al. in Kheiri et al., 2013) K.T. Kiss, Ector & Ács, 2016
- Species Cyclotella iridioides Manguin ex Kociolek & Reviers, 1996
- Species Cyclotella iris Brun & Héribaud-Joseph
- Species Cyclotella irregularis Grunow, 1884
- Species Cyclotella iwatensis H.Tanaka, 2012 †
- Species Cyclotella iyengaria Rao & Awasthi, 1963
- Species Cyclotella jonesii McLaughlin, 1992
- Species Cyclotella jurilji Skvortzow, 1971
- Species Cyclotella juriljii Racki, 1975
- Species Cyclotella kansasensis G.D.Hanna, 1932 †
- Species Cyclotella kansasica Hanna, 1932 †
- Species Cyclotella karena Loginova, 1991
- Species Cyclotella kathmanduensis Hayashi, 2007 † accepted as Lindavia kathmanduensis (Hayashi) Nakov et al., 2015 †
- Species Cyclotella katiana S.Sala & J.J.Ramírez, 2008
- Species Cyclotella kelloggii Hanna, 1932
- Species Cyclotella keutzingiana
- Species Cyclotella kisselevii O.Korotkevich, 1959
- Species Cyclotella kitabayashii Tanaka accepted as Lindavia kitabayashii (Tanaka & Kashima) Nakov et al., 2015
- Species Cyclotella kohsakaensis H. Tanaka & H. Kobayasi, 1996
- Species Cyclotella krammeri Håkansson, 1990
- Species Cyclotella kuetzingiana Thwaites, 1848 accepted as Pantocsekiella kuetzingiana (Thwaites, 1848) K.T. Kiss & Ács, 2016
- Species Cyclotella kuetzingiana (Skvortzow) Skabichevskii, 1960 accepted as Cyclotella kuetzingiana var. hankensis Skvortzow, 1929
- Species Cyclotella kuetzingiana W. Smith, 1853
- Species Cyclotella kuetzingii Kisselev, 1924
- Species Cyclotella kurdica Håkansson, 1993 accepted as Lindavia kurdica (Håkansson) Nakov et al., 2015
- Species Cyclotella kutzingiana
- Species Cyclotella kützingiana Thwaites accepted as Cyclotella kuetzingiana Thwaites, 1848
- Species Cyclotella kützingiana Chauvin in A. Schmidt, 1900
- Species Cyclotella lacunarum Hustedt, 1922 accepted as Lindavia lacunarum (Hustedt) Nakov et al., 2015
- Species Cyclotella lacuskarluki E. Manguin, 1960
- Species Cyclotella lacus-karluki Manguin ex Kociolek & Reviers, 1996 accepted as Discostella lakuskarluki (Manguin ex Kociolek & Reviers) Potapova, Aycock & Bogan
- Species Cyclotella lacustris Bolochontzev, 1910
- Species Cyclotella ladogensis Cleve-Euler, 1951
- Species Cyclotella laevis (Ehrenberg) Kützing, 1849 accepted as Hyalodiscus laevis var. laevis Ehrenberg, 1845
- Species Cyclotella laevissima Van Goor, 1920
- Species Cyclotella lemanensis (Otto Müller) Lemmerman, 1900 accepted as Cyclotella comta f. lemanica Otto Müller in Schroter, 1896
- Species Cyclotella lenoblei E. Manguin, 1949
- Species Cyclotella ligata Manguin in Bourrelly & Manguin, 1952
- Species Cyclotella ligustica Kützing, 1844
- Species Cyclotella lineata
- Species Cyclotella litoralis Lange & Syvertsen, 1989
- Species Cyclotella lossevae Loginova, 1991
- Species Cyclotella lucens (Hustedt) Simonsen, 1987 accepted as Stephanodiscus lucens Hustedt, 1939
- Species Cyclotella lucernensis Bachm., 1911
- Species Cyclotella lundii Devlin, 1983
- Species Cyclotella mahoodii Kociolek & Khursevich, 2008
- Species Cyclotella major Kützing
- Species Cyclotella major (Kützing) Rabenhorst, 1863 accepted as Cyclotella meneghiniana var. major Kützing, 1849
- Species Cyclotella mammilla Kützing accepted as Discoplea mammilla Ehrenberg, 1845
- Species Cyclotella manguini Ehrlich, 1967
- Species Cyclotella marginata Castracane, 1880
- Species Cyclotella mascarenica R. Klee, V. Houk & S. Bielsa, 2000
- Species Cyclotella mauchaiana Palik, 1958
- Species Cyclotella mauchaiana Palik, 1961
- Species Cyclotella maxima Kützing, 1844
- Species Cyclotella meduanae Germain, 1981
- Species Cyclotella melnikiae S.I. Genkal & N.A. Bondarenko, 2010 accepted as Pantocsekiella melnikiae (Genkal & Bondarenko, 2010) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella melosiriodes
- Species Cyclotella melosiroides (Kirchner) Lemmermann, 1900 accepted as Cyclotella comta var. melosiroides Kirchner in Schröter & Kirchner, 1896
- Species Cyclotella meneghiniana Kützing, 1844
- Species Cyclotella metochia N.Ognjanova-Rumenova, 2014 † accepted as Lindavia metochia (Ognjanova-Rumenova) Nakov et al., 2015 †
- Species Cyclotella michiganiana Skvortzov, 1937 accepted as Lindavia michiganiana (Skvortzow) Nakov et al., 2015
- Species Cyclotella minima Barber & Carter, 1970
- Species Cyclotella minuta (Skvortzov) Antipova, 1956 accepted as Lindavia minuta (Skvortzow) Nakov et al., 2015
- Species Cyclotella minutissima
- Species Cyclotella minutula Kützing, 1844 †
- Species Cyclotella miyiensis Qi & Yang, 1985 †
- Species Cyclotella multipunctata Serieyssol, 1993
- Species Cyclotella naegelii Meneghini, 1845 (1853)
- Species Cyclotella nana Hustedt, 1957
- Species Cyclotella narochanica S.I. Genkal & T.M. Mikheeva, 2006 accepted as Pantocsekiella narochanica (Genkal & Mikheeva, 2006) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella neocaledonica Manguin ex Kociolek & Reviers, 1996
- Species Cyclotella nevadica Khursevich & Kociolek, 2008
- Species Cyclotella norochanica S.I. Genkal & T.M. Mikheeva, 2006
- Species Cyclotella notata Losseva, 1980 † accepted as Pantocsekiella notata (Loseva, 1980) K.T. Kiss & Ács, 2016
- Species Cyclotella nuda Hajós, 1968
- Species Cyclotella obliquata Qi & Yang, 1985 †
- Species Cyclotella ocellata Pantocsek, 1901 accepted as Pantocsekiella ocellata (Pantocsek, 1901) K.T. Kiss & Ács, 2016
- Species Cyclotella ocellata-kuetzingiana Stoermer & Kreis, 1978
- Species Cyclotella oligactis Ralfs accepted as Discoplea oligactis Ehrenberg, 1854
- Species Cyclotella omarensis (Kuptzova) Loseva & Makarova, 1977 † accepted as Lindavia omarensis (Kuptzova) Nakov et al., 2015 †
- Species Cyclotella operculata (C.Agardh) Brébisson, 1838 accepted as Frustulia operculata C.Agardh, 1827
- Variety Cyclotella operculata var. antiqua (W. Smith) Brun, 1880 accepted as Cyclotella antiqua var. antiqua W. Smith, 1853
- Variety Cyclotella operculata var. genuina Cleve-Euler, 1951
- Variety Cyclotella operculata var. inaequipunctata Cleve-Euler, 1951
- Variety Cyclotella operculata var. major Cleve & Möller, 1878
- Variety Cyclotella operculata var. major Grunow in Schneider, 1878
- Variety Cyclotella operculata var. mesoleia Grunow in Schenider, 1878
- Variety Cyclotella operculata var. minima Radzimowsky, 1926
- Variety Cyclotella operculata var. minutula (Kützing) Brun, 1880 accepted as Cyclotella minutula Kützing, 1844 †
- Variety Cyclotella operculata var. ocellata (Pantocsek) Cleve-Euler, 1932 accepted as Lindavia ocellata (Pantocsek) Nakov et al., 2015
- Variety Cyclotella operculata var. radiata Loginova in Loginova & Vishnevskaya, 1987
- Variety Cyclotella operculata var. radiosa Grunow in Schneider, 1878
- Variety Cyclotella operculata var. rectangula Kützing, 1849
- Variety Cyclotella operculata var. rectangulata Kützing according to Mills, 1934
- Variety Cyclotella operculata var. unipunctata Hustedt, 1922
- Forma Cyclotella operculata f. minuta Grunow in Van Heurck, 1882
- Forma Cyclotella operculata f. operculata (Agardh) Kützing, 1833 accepted as Frustulia operculata C.Agardh, 1827
- Forma Cyclotella operculata f. rectangula Kützing according to Mills, 1934
- Species Cyclotella operculata auct. accepted as Cyclotella operculata (C.Agardh) Brébisson, 1838
- Species Cyclotella operculata [sensu] Hantzsch in Rabenhorst, 1861-1879
- Species Cyclotella oregonica (Ehrenberg) Ralfs, 1861 accepted as Discoplea oregonica Ehrenberg, 1854
- Species Cyclotella oregonica J.P. Kociolek & G.K. Khursevich in Khursevich & Kociolek, 2008
- Species Cyclotella orientalis Lee, Chung & Gotoh, 1995
- Species Cyclotella ornata (Skvortzov) Flower, 1991
- Species Cyclotella ovalis Fricke in Schmidt et al., 1906
- Species Cyclotella ovalis Brebisson in Brebisson & Godey, 1838
- Species Cyclotella ovata Tynni, 1982
- Species Cyclotella paleo–ocellata Vossel et Van de VIjVer in Vossel et al., 2015 accepted as Lindavia paleo-ocellata (Vossel & Van de Vijver) Nakov et al., 2015
- Species Cyclotella palustris S.I. Genkal & M.S. Kulikovskiy, 2005 accepted as Pantocsekiella palustris (Genkal & Kulikovskiy, 2005) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella pamirensis Kisselev, 1957
- Species Cyclotella pantanelli (Castracane) Fricke in Schmidt & al., 1900 accepted as Cyclotella pantanelliana Castracane, 1886
- Species Cyclotella pantanelliana Castracane, 1886
- Species Cyclotella papillosa O'Meara, 1875
- Species Cyclotella paradistinguenda Katrantsiotis & Risberg, 2016 †
- Species Cyclotella paraocellata A.Cvetkoska, P.B.Hamilton, N.Ognjanova-Rumenova & Z.Levkov, 2014 accepted as Pantocsekiella paraocellata (Cvetkoska et al., 2014) K.T. Kiss & Ács, 2016
- Species Cyclotella parvula Loginova, 1987 † accepted as Lindavia parvula (Loginova) Nakov et al., 2015
- Species Cyclotella patagonica (Ehrenberg) Kützing, 1849
- Species Cyclotella pelagica Grunow in Van Heurck, 1882
- Species Cyclotella perforata Héribaud, 1903
- Species Cyclotella pertenuis J.W. Bailey, 1856
- Species Cyclotella peruana Kützing accepted as Discoplea peruana Ehrenberg, 1842
- Species Cyclotella petenensis Sylvestre, Paillès & Escobar in Paillès et al., 2018 †
- Species Cyclotella physoplea Kützing accepted as Discoplea physoplea Ehrenberg, 1845
- Species Cyclotella picta Kützing accepted as Discoplea picta Ehrenberg, 1845
- Species Cyclotella planctonica Brunnthaler, 1901
- Species Cyclotella pliostelligera Tanaka & Nagumo, 2002
- Species Cyclotella plitvicensis Hustedt, 1945
- Species Cyclotella plitviscensis Hustedt, 1945 accepted as Cyclotella plitvicensis Hustedt, 1945
- Species Cyclotella polymorpha Meyer & Håkansson, 1996 accepted as Pantocsekiella polymorpha (B. Meyer & Håkansson) K.T. Kiss & Ács, 2016
- Species Cyclotella praekutzingiana Mukhina, 1978
- Species Cyclotella praeminuta G.K. Khursevich in Khursevich et al., 2001 † accepted as Lindavia praeminuta (Khursevich) Nakov et al., 2015 †
- Species Cyclotella praetermissa Lund, 1951 accepted as Lindavia praetermissa (Lund) Nakov et al., 2015
- Species Cyclotella pratii Toman, 1948
- Species Cyclotella pravissima Giffen, 1980
- Species Cyclotella prespanensis A.Cvetkoska, P.B.Hamilton, N.Ognjanova-Rumenova & Z.Levkov, 2014 accepted as Pantocsekiella prespanensis (Cvetkoska et al.) K.T. Kiss & Ács, 2016
- Species Cyclotella proshkinae Jousé & Mukhina, 1978
- Species Cyclotella pseudocomensis Scheffler, 1994 accepted as Pantocsekiella pseudocomensis (Scheffler) K.T. Kiss & Ács, 2016
- Species Cyclotella pseudokansasica G.K.Khursevich & J.P.Kociolek, 2013 †
- Species Cyclotella pseudonana T.P.Chang accepted as Thalassiosira pseudonana Hasle & Heimdal, 1970
- Species Cyclotella pseudostelligera Hustedt, 1939
- Species Cyclotella pseudostriata Skvortzow, 1971
- Species Cyclotella pulchella L.W. Bailey, 1861
- Species Cyclotella pumila Grunow, 1882
- Species Cyclotella punctata W.Smith, 1856
- Species Cyclotella pygmaea Pantocsek, 1892 † accepted as Tertiarius pygmaeus (Pantocsek) Håkansson & Khursevich, 1997 †
- Species Cyclotella quadricauda Kumsare, 1951
- Species Cyclotella quadrijuncta (Schröter) von Keissler, 1910 accepted as Cyclotella comta var. quadrijuncta Schrot., 1896
- Species Cyclotella quillensis Bailey, 1922
- Species Cyclotella radiata Brightwell, 1860
- Species Cyclotella radiatopunctata Pantocsek, 1892
- Species Cyclotella radiosa (Grunow) Lemmermann, 1900 accepted as Cyclotella comta var. radiosa Grunow in Van Heurck, 1882
- Species Cyclotella rectangula Brébisson ex Rabenhorst, 1853
- Species Cyclotella reczickiae Khursevich & Loginova, 1984 † accepted as Pantocsekiella reczickiae (Khursevich & Loginova) K.T. Kiss & Ács, 2016 †
- Species Cyclotella regina Mann, 1907
- Species Cyclotella rheinholdii Reichelt, 1908
- Species Cyclotella rhomboideoelliptica Skuja, 1937 accepted as Lindavia rhomboideoelliptica (Skuja) Nakov et al., 2015
- Species Cyclotella rhomboideo-elliptica
- Species Cyclotella rohlenaae Pantocsek, 1909
- Species Cyclotella rossii Håkansson, 1990 accepted as Pantocsekiella rossii (Håkansson) K.T. Kiss & Ács, 2016
- Species Cyclotella rota (Ehrenberg) Kützing, 1849 accepted as Discoplea rota Ehrenberg, 1844
- Species Cyclotella rotula Kützing, 1844 accepted as Discoplea rotula Ehrenberg, 1844
- Species Cyclotella salina Marsson, 1901
- Species Cyclotella satsumaensis Tanaka & Houk † accepted as Tertiarius satsumaensis (Tanaka & Houk) Nakov et al., 2015 †
- Species Cyclotella scaldensis Muylaert & Sabbe, 1996
- Species Cyclotella schambica
- Species Cyclotella schroeteri Lemmermann, 1900 accepted as Lindavia schroeteri (Lemmermann) Nakov et al., 2015
- Species Cyclotella schroeteri auct. plur. according to Hustedt, 1928
- Species Cyclotella schuetii Schütt, 1899
- Species Cyclotella schumanni (Grunow) Håkansson, 1990 accepted as Cyclotella kuetzingiana var. schumannii Grunow in Schneider, 1878
- Species Cyclotella schumannii (Grunow) Håk.
- Species Cyclotella schwindii O. Bock & W. Bock, 1953
- Species Cyclotella scotica Kützing, 1844
- Species Cyclotella senezencis Ehrlich, 1968
- Species Cyclotella seratula Hohn & Hellerman, 1963
- Species Cyclotella servant-vildary
- Species Cyclotella servant-vildaryae Mukhina in Jousé & Mukhina, 1978
- Species Cyclotella servant-vildaryi V.V.Mukhina † accepted as Lindavia servant-vildary (Mukhina) Nakov et al., 2015 †
- Species Cyclotella setigera Kisselev, 1930
- Species Cyclotella sevilleana Deby, 1884 accepted as Lindavia sevilleana (Deby) Nakov et al., 2015
- Species Cyclotella sexnotata Deby, 1884 accepted as Lindavia sexnotata (Deby) Nakov et al., 2015
- Species Cyclotella sexpunctata Deby ex Pelletan, 1889
- Species Cyclotella shanxiensis Xie & Qi, 1984 accepted as Edtheriotia shanxiensis (XIe & Qi) Kociolek, You, Stepanek, R.L.Lowe & Q-X.Wang
- Species Cyclotella shengxianensis Huang in Huang & Cai, 1984
- Species Cyclotella sibirica Skabichevskij, 1967
- Species Cyclotella sinensis (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Discoplea sinensis Ehrenberg, 1847
- Species Cyclotella sjabatjakkensis Cleve-Euler, 1951
- Species Cyclotella socialis Schütt, 1899
- Species Cyclotella sollevata Tofilovska, Cvetkoska, Jovanovska, Ognjanova–Rumenova & Levkov, 2016 †
- Species Cyclotella soluta Kützing
- Species Cyclotella spinosa Schumann, 1863
- Species Cyclotella stelligera Cleve & Grunow, 1882
- Species Cyclotella stelligeroides Hustedt, 1945
- Species Cyclotella stengella G.W. Prescott, 1979
- Species Cyclotella stipata Frenguelli, 1942 accepted as Guarreraea stipata (Frenguelli) Kociolek & Guerrero in Guerrero et al., 2018
- Species Cyclotella stoermeri G.K.Khursevich & J.P.Kociolek, 2013 †
- Species Cyclotella strelnikovae Genkal & Yarushina, 2004 accepted as Pantocsekiella strelnikovae (Genkal & Yarishina) K.T. Kiss, Genkal & Ács, 2016
- Species Cyclotella striata (Kützing) Grunow, 1880
- Species Cyclotella striata sensu auct. e. p. according to Hustedt, 1928
- Species Cyclotella stylorum Brightwell, 1860
- Species Cyclotella styriaca Hustedt, 1942 accepted as Lindavia styriaca (Hustedt) Nakov et al., 2015
- Species Cyclotella subatomus Gasse, 1975
- Species Cyclotella subsalina Grunow, 1882
- Species Cyclotella substelligera H.P. Gandhi, 1998 accepted as Cyclotella substelligera H.P.Gandhi ex Karthick, 2020
- Species Cyclotella substelligera H.P.Gandhi ex Karthick, 2020
- Species Cyclotella substylorum Archibald, 1966
- Species Cyclotella sudanensis (R.F.Bastow) G.Reid & D.M.Williams, 2008 accepted as Stephanodiscus sudanensis R.F.Bastow, 1960
- Species Cyclotella superba Fricke in Schmidt et al., 1900
- Species Cyclotella szakalensis Grunow in Pantocsek, 1886
- Species Cyclotella tasmanica Haworth & Tyler, 1993
- Species Cyclotella tataensis Palik, 1963
- Species Cyclotella tecta Håkansson & R.Ross, 1984
- Species Cyclotella temperei M.Perag. & Hérib.
- Species Cyclotella temperei Brun in A. Schmidt, 1900
- Species Cyclotella tempereiformica G.K. Khursevich in Khursevich et al., 2001 † accepted as Tertiarius tempereiformica (Khursevich) Nakov et al., 2015 †
- Species Cyclotella temperiana (Loginova) Loginova, 1989 accepted as Lindavia temperiana (Loginova) Nakov et al., 2015
- Species Cyclotella tenuistriata Hustedt, 1952 accepted as Lindavia tenuistriata (Hustedt) Nakov et al., 2015
- Species Cyclotella terryana Tempère & Peragallo, 1909
- Species Cyclotella thienemannii Jurilj, 1954 accepted as Lindavia thienemannii (Jurilj) Nakov et al., 2015
- Species Cyclotella tibetana Hustedt, 1922
- Species Cyclotella torquatia Barron, 1975
- Species Cyclotella transylvanica Pantocsek
- Species Cyclotella trichonidea Economou-Amilli, 1982 accepted as Pantocsekiella trichonidea (Economou–Amilli) K.T. Kiss & Ács, 2016
- Species Cyclotella tripartita Håkansson, 1990 accepted as Pantocsekiella tripartita (Håkansson) K.T. Kiss & Ács, 2016
- Species Cyclotella tubulosa Khursevich & Kociolek, 2008
- Species Cyclotella umbilicata (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Discoplea umbilicata Ehrenberg, 1854
- Species Cyclotella undata Kützing accepted as Discoplea undata Ehrenberg, 1844 (1845)
- Species Cyclotella undulata Bodeanu, 1976
- Species Cyclotella undulata Harting, 1852
- Species Cyclotella undulata (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Discoplea undulata Ehrenberg, 1854
- Species Cyclotella utahensis C.L.Graeff, J.P.Kociolek & S.R.Rushford, 2013
- Species Cyclotella vaetteri Cleve-Euler, 1951
- Species Cyclotella venusta (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Discoplea venusta Ehrenberg, 1852
- Species Cyclotella virihensis Cleve-Euler, 1951
- Species Cyclotella vorticosa A.Berg, 1951
- Species Cyclotella widerkehrii Werner, 1960
- Species Cyclotella woltereckii Hustedt, 1942
- Species Cyclotella wuethrichiana Druart & Straub, 1988 accepted as Pantocsekiella wuethrichiana (Druart & F. Straub) K.T. Kiss & Ács, 2016
- Species Cyclotella wulfiae Meyer & Håkansson, 1997
- Variety Cyclotella var. pumila (Grun. In Van Heurck) Hust., 1928 accepted as Cyclotella meneghiniana var. pumila (Grunow in Van Heurck) Hustedt, 1928
- Variety Cyclotella var. quadrijuncta (Schröt.) Keissler, 1910 accepted as Cyclotella schroeteri Lemmermann, 1900
- Genus Dimidialimbus H.Tanaka & T.Nagumo, 2013 † (1)
- Genus Discostella Houk & Klee, 2004 (4)
- Genus Edtheriotia Kociolek, Q.You, Stepanek, R.L.Lowe & Q-X.Wang, (2)
- Genus Fascinorbis Jeff.R.Stone, Edlund & A.J.Alverson, 2020 †
- Genus Handmannia M. Peragallo in Handmann, 1913 accepted as Lindavia (F. Schütt) G.B. De Toni & A. Forti, 1900
- Genus Lindavia (F. Schütt) G.B. De Toni & A. Forti, 1900 (65)
- Genus Mesodictyon E. Theriot & J.P. Bradbury, 1987 †
- Genus Paleotertiarius Blanco, 2020 † accepted as Tertiarius H. Håkansson & G. Khursevich, 1997 †
- Genus Pantocsekiella K.T. Kiss & Ács, 2016 (36)
- Genus Pelagodictyon K.B. Clarke, 1994
- Genus Pliocaenicus F.E. Round & H. Hakansson, 1992 † (1)
- Genus Pseudostephanodiscus J. Sieminska, 1988
- Genus Puncticulata Håkansson, 2002
- Genus Stephanocostis S.I. Genkal & A.E. Kuzmina, 1985
- Genus Stephanodiscus C.G. Ehrenberg, 1845 (13)
- Genus Strelnikoviella J.P.Kociolek, G.K.Khursevich & E.C.Theriot, 2014 †
- Genus Tertiariopsis Khursevich & Kociolek in Khursevich, Kociolek & Fedenya, 2002 †
- Genus Tertiarius H. Håkansson & G. Khursevich, 1997 †
- Family Thalassiosiraceae Lebour, 1930 (39)
- Family Thalassiosiropsidaceae
- Family Trochosiraceae
- Order Arcanodiscales (5)
- Order Stictocyclales
- Subclass Fragilariophycidae (483)
- Order Centrales
