Conticribra guillardii (Hasle) K.Stachura-Suchoples & D.M.Williams, 2009 † accepted as Thalassiosira guillardii Hasle, 1978
Conticribra nevadica (Khursevich & Van Landingham) K.Stachura-Suchoples & D.M.Williams, 2009 † accepted as Spicaticribra nevadica (Khursevich & Van Landingham) Khursevich & Kociolek †
Conticribra sinica P.Yu, Q.You & Q.Wang, 2022
Conticribra tricircularis K.Stachura-Suchoples & D.M.Williams, 2009 † accepted as Spicaticribra tricircularis (Stachura-Suchoples & D. M. Williams) Kociolek & Khursevich in Khursevich & Kociolek, 2012 †
Conticribra weissflogii (Grunow) K.Stachura-Suchoples & D.M.Williams, 2009 †
Conticribra weissflogiopsis J.S.Park & J.H.Lee, 2014 †
Coscinosira antarctica Kozlova, 1962 (uncertain > unassessed )
Coscinosira antarctica Kozlova, 1967 (uncertain > unassessed )
Coscinosira antarctica Manguin, 1915 (uncertain > unassessed )
Coscinosira atlantica P.-A.Dangeard, 1927 (uncertain > unassessed )
Coscinosira bioculata (Grunow) Heiden in Heiden & Kolbe, 1928 accepted as Coscinodiscus bioculatus var. bioculatus Grunow, 1884 accepted as Shionodiscus bioculatus (Grunow) Alverson, Kang & Theriot, 2006
Coscinosira cruciata Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed )
Coscinosira floridana I.C.G.Cooper, 1958 (uncertain > unassessed )
Coscinosira mediterranea Schröder, 1911 (uncertain > unassessed )
Coscinosira oestrupii Ostenfeld, 1900 represented as Shionodiscus oestrupii (Ostenfeld) A.J.Alverson, S.H.Kang & E.C.Theriot, 2006
Coscinosira ornata Proschkina-Lavrenko, 1961 (uncertain > unassessed )
Coscinosira polychorda (Gran) Gran, 1900 accepted as Coscinodiscus polychordus Gran, 1897
Coscinosira poroseriata Ramsfjell, 1959 (uncertain > unassessed )
Coscinosira stellaris (F.C.S.Roper) H.Heiden
Coscinosira stellaris f. laevis Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed )
Coscinosira stellaris f. symbolophora (Grunow) Heiden in Heiden & Kolbe, 1928 accepted as Coscinodiscus symbolophorus f. symbolophorus Grunow, 1884
Coscinosira stellaris var. stellaris (Roper) Heiden in Heiden & Kolbe, 1928 accepted as Coscinodiscus stellaris var. stellaris Roper, 1858
Coscinosira sybilla Robinson, 1948 (uncertain > unassessed )
Crateriportula inconspicuus (Makarova & Pomazkina) Flower & Håkansson, 1994 accepted as Stephanodiscus inconspicuus Makarova & Pomazkina, 1992
Cribrionella ohridana Jovanovska, Cvetkoska, Tofilovska, Ognjanova-Rumenova & Levkov †
Cyclocostis rolfii Paillès in Paillès et al., 2020 †
Cyclostephanos andina (Theriot, Carney & Richerson) Khursevich, 1989 accepted as Cyclotella andina E.Theriot, H.J.Carney & P.J.Richerson, 1985
Cyclostephanos andinus (E.Theriot, H.G.Carney & P.J.Richerson) P.M.Tapia, E.C.Theriot, S.C.Fritz, F.Cruces & P.Rivera, 2004 accepted as Cyclotella andina E.Theriot, H.J.Carney & P.J.Richerson, 1985
Cyclostephanos costatilimbus (H.Kobayasi & H.Kobayashi) E.F.Stoermer, H.Håkansson & E.C.Theriot, 1988 accepted as Stephanodiscus costatilimbus H.Kobayasi & H.Kobayashi, 1986
Cyclostephanos costatus L.P.Loginova, E.G.Lupikina & G.K.Khursevich, 1984
Cyclostephanos costatus Loginova, Lupikina & Khursevich, 1984 accepted as Lindavia costata (Loginova, Lupikina & Khursevich) Nakov et al., 2015
Cyclostephanos costatus var. sibiricus (Skabichevskii) Lupikina in Khursevich et al., 1989 accepted as Stephanodiscus dubius Skabichevskii, 1953
Cyclostephanos damasi (Hustedt) Stoermer & Håkansson validated by Theriot et al., 1987 accepted as Stephanodiscus damasi Hustedt, 1949 accepted as Stephanodiscus damasii Hustedt, 1949
Cyclostephanos damasii (Hustedt) Stoermer & Håkansson, 1988 accepted as Stephanodiscus damasi Hustedt, 1949 accepted as Stephanodiscus damasii Hustedt, 1949
Cyclostephanos delicatus (S.I.Genkel) S.J.Casper & W.Scheffler, 1990 accepted as Stephanodiscus delicatus S.I.Genkal, 1985
Cyclostephanos dubius (Hustedt) Round, 1988 accepted as Cyclotella dubia var. dubia Fricke in Schmidt et al., 1900
Cyclostephanos fenestratus Theriot & Kociolek, 1988 † (uncertain > unassessed )
Cyclostephanos gasseae E. Fourtanier, 1987 (uncertain > unassessed )
Cyclostephanos guatemalae Theriot & Bradbury, 1989 (uncertain > unassessed )
Cyclostephanos invisitatus (Hohn & Hellermann) Theriot, Stoermer & Håkasson, 1988 accepted as Stephanodiscus invisitatus Hohn & Hellermann, 1963
Cyclostephanos kyushuensis Tanaka (uncertain > unassessed )
Cyclostephanos lacrimis E.C.Theriot & J.P.Bradbury, 1989 (uncertain > unassessed )
Cyclostephanos malawiensis Casper & Klee in Klee & Casper, 1992 (uncertain > unassessed )
Cyclostephanos marginatus (Mukhina) Khursevich in Khursevich & Mukhina, 1990 accepted as Stephanodiscus marginatus Mukhina, 1978
Cyclostephanos novae zeelandiae (Cleve) Round, 1982 accepted as Stephanodiscus novaezeelandiae Cleve, 1881
Cyclostephanos novaezeelandiae (Cleve) Round validated by Theriot et al., 1987 accepted as Stephanodiscus novaezeelandiae Cleve, 1881
Cyclostephanos numataensis H. Tanaka & T. Nagumo, 2000 (uncertain > unassessed )
Cyclostephanos omarensis (Kuptzova) Khursevich & Loginova in Khursevich et al., 1989 † accepted as Lindavia omarensis (Kuptzova) Nakov et al., 2015 †
Cyclostephanos omarensis var. ephiopiecus Khursevich & Loginova in Khursevich, 1989 (uncertain > unassessed )
Cyclostephanos pantocsekii (Fricke) Kuptzova & Khursevich in Khursevich et al., 1989 accepted as Stephanodiscus pantocseki Fricke in Schmidt et al., 1902
Cyclostephanos patagonicus J.M.Guerrero & R.O.Echenique
Cyclostephanos pliocenicus Khursevich & Mukhina in Khursevich et al., 1989 (uncertain > unassessed )
Cyclostephanos ponticus (Jousé) Khursevich in Khursevich et al., 1989 accepted as Stephanodiscus pontica Jousé, 1978
Cyclostephanos pygmaea (Pantocsek) Khursevich, 1989
Cyclostephanos ramosus T.Hayashi, 2015
Cyclostephanos salsae Maidana & Aponte in Maidana et al., 2017
Cyclostephanos servant-vildary (Mukhina) Khursevish, 1990 accepted as Cyclotella servant-vildaryae Mukhina in Jousé & Mukhina, 1978
Cyclostephanos servant-vildary var. elegans (Mukhina) Khursevich, 1989 †
Cyclostephanos shanxiensis (Xie & Qi) Khursevich, 1989 accepted as Edtheriotia shanxiensis (XIe & Qi) Kociolek, You, Stepanek, R.L.Lowe & Q-X.Wang
Cyclostephanos sibirica (Skabichevskii) Genkal & Popovskaya, 1984 accepted as Stephanodiscus dubius Skabichevskii, 1953
Cyclostephanos stelliformis Khursevich & Mukhina, 1986 (uncertain > unassessed )
Cyclostephanos tholiformis Stoermer, Håkansson & Theriot, 1987 (uncertain > unassessed )
Cyclostephanos undatus E.C.Theriot & J.P.Kociolek, 1988 † (uncertain > unassessed )
Cyclostephanos williamsii E. Fourtanier, 1987 (uncertain > unassessed )
Cyclotella abnormis Cleve-Euler, 1915 (uncertain > unassessed )
Cyclotella actinocyclus (Ehrenberg) Kützing, 1849 accepted as Pyxidicula actinocyclus Ehrenberg, 1844
Cyclotella actinopleurata E. Clerici, 1907 (uncertain > unassessed )
Cyclotella aegaea A.Economou-Amilli, 1987 (uncertain > unassessed )
Cyclotella aegaea var. pythagorea A.Economou-Amilli, 1987 (uncertain > unassessed )
Cyclotella affinis Grunow in Möller (uncertain > unassessed )
Cyclotella affinis Makarova & Genkal accepted as Cyclotella caspia var. affinis Proschkina-Lavrenko & Makarova in Makarova & Proschkina-Lavrenko, 1964
Cyclotella afrerensis Gasse, 1974 (uncertain > unassessed )
Cyclotella africana Rabenhorst, 1855 (uncertain > unassessed )
Cyclotella agassizensis Håkansson & Kling, 1994 (uncertain > unassessed )
Cyclotella alchichicana Olivia, Lugo, Alocer & Cantoral-Uriza, 2006 (uncertain > unassessed )
Cyclotella aliquantula Hohn & Hellermann, 1963 (uncertain > unassessed )
Cyclotella ambigua Grunow, 1880 (uncertain > unassessed )
Cyclotella americana (Ehrenberg) Kützing, 1849 accepted as Discoplea americana Ehrenberg, 1844
Cyclotella americana Schmidt in Schmidt et al., 1900 (uncertain > unassessed )
Cyclotella andancensis Ehrlich, 1967 accepted as Pantocsekiella andancensis (A. Ehrlich, 1967) K.T. Kiss, Ector & Ács, 2016
Cyclotella andancensis var. bauzilensis Serieyssol, 1981 (uncertain > unassessed )
Cyclotella andancensis var. bipolaira Serieyssol, 1981 (uncertain > unassessed )
Cyclotella andina E.Theriot, H.J.Carney & P.J.Richerson, 1985 (uncertain > unassessed )
Cyclotella annulata Suringar, 1870 (uncertain > unassessed )
Cyclotella anomala K.E. Lohman, 1957 (uncertain > unassessed )
Cyclotella antigua W.Smith, 1853 accepted as Cyclotella antiqua W.Smith, 1853 accepted as Lindavia antiqua (W.Smith) Nakov et al., 2015
Cyclotella antiqua W.Smith, 1853 accepted as Lindavia antiqua (W.Smith) Nakov et al., 2015
Cyclotella antiqua var. antiqua W. Smith, 1853 (uncertain > unassessed )
Cyclotella antiqua var. labynkyrensis Komarenko in Komarenko & Vasilyeva, 1975 (uncertain > unassessed )
Cyclotella antiqua var. minor Suxena & Venkateswarlu, 1968 (uncertain > unassessed )
Cyclotella antiqua var. mirifica Héribaud, 1903 (uncertain > unassessed )
Cyclotella antiqua var. vernierei Héribaud, 1903 (uncertain > unassessed )
Cyclotella arctica Genkal & Kharitonov, 1996 accepted as Pantocsekiella arctica (Genkal & Kharitonov, 1996) K.T. Kiss, Genkal & Ács, 2016
Cyclotella arentii Kolbe, 1948 (uncertain > unassessed )
Cyclotella areolata Hustedt, 1935 (uncertain > unassessed )
Cyclotella armenica Loginova & Pirumova in Loginova, Aleshinskaya & Pirumova, 1990 accepted as Lindavia armenica (Loginova & Pirumova) Nakov et al., 2015
Cyclotella asiatica Brun in Brun & Tempère, 1889 (uncertain > unassessed )
Cyclotella asperula Marsson, 1901 (uncertain > unassessed )
Cyclotella asterocostata Lin, Xie & Cai, 1985 (uncertain > unassessed )
Cyclotella asterocostata var. striata Chen, 1987 (uncertain > unassessed )