Actinocyclus actinochilus (Ehrenberg) Simonsen, 1982 accepted as Coscinodiscus actinochilus Ehrenberg, 1844
Actinocyclus adeliae Manguin, 1957 (uncertain > unassessed )
Actinocyclus asteriscus (J.A. Barron) Cong Wu, D.M. Williams, Zhiyuan Peng & Chixin Chen, 2022 †
Actinocyclus cholnokyi VanLandingham, 1967 (uncertain > unassessed )
Actinocyclus complanatus F.S.Castracane degli Antelminelli
Actinocyclus complanatus var. complanatus Castracane, 1886 (uncertain > unassessed )
Actinocyclus curvatulus Janisch, 1874 (uncertain > unassessed )
Actinocyclus curvulatus
Actinocyclus dimorphus (Castracane) Harwood & Maruyama, 1992 accepted as Coscinodiscus dimorphus Castracane, 1886
Actinocyclus divisus (Grunow) Hustedt, 1958 accepted as Coscinodiscus divisus var. divisus Grunow, 1878
Actinocyclus ehrenbergii Ralfs, 1861
Actinocyclus ehrenbergii Schumann, 1867 (uncertain > unassessed )
Actinocyclus ehrenbergii var. asteriscus Barron, 1975 † represented as Actinocyclus asteriscus (J.A. Barron) Cong Wu, D.M. Williams, Zhiyuan Peng & Chixin Chen, 2022 †
Actinocyclus exiguus G.Fryxell & Semina, 1981 (uncertain > unassessed )
Actinocyclus ingens Rattray, 1890 † (uncertain > unassessed )
Actinocyclus ingens var. ovalis R.Gersonde, 1990 (uncertain > unassessed )
Actinocyclus karstenii Van Heurck, 1909 (uncertain > unassessed )
Actinocyclus normanii (Gregory) Hustedt, 1957
Actinocyclus octonarius Ehrenberg, 1837 accepted as Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837
Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (uncertain > unassessed )
Actinocyclus senarius Ehrenberg, 1838 (uncertain > unassessed )
Actinocyclus spiritus T.P.Watkins, 1986 (uncertain > unassessed )
Actinocyclus undulatus J.W.Bailey, 1842 (uncertain > unassessed )
Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837
Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838
Actinoptychus undulatus (J.W.Bailey) Ralfs, 1861 accepted as Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838
Actinoptychus undulatus J.W.Bailey ex Hustedt, 1927 accepted as Actinocyclus undulatus J.W.Bailey, 1842
Azpeitia nodulifera (A.W.F.Schmidt) G.A.Fryxell & P.A.Sims, 1986
Azpeitia tabularis (Grunow) G.Fryxell & P.A.Sims, 1986 accepted as Coscinodiscus tabularis var. tabularis Grunow, 1884
Charcotiella australis (G.Karst) S.Blanco & C.E.Wetzel, 2016
Charcotiella irregularis (Perag.) S.Blanco & C.E.Wetzel, 2016
Coscinodiscus actinochilus Ehrenberg, 1844 (uncertain > unassessed )
Coscinodiscus anomalus VanLandingham, 1968 (uncertain > unassessed )
Coscinodiscus asteromphalus Ehrenberg, 1844 (uncertain > unassessed )
Coscinodiscus asteromphalus Schmidt in Schmidt et al., 1888 (uncertain > unassessed )
Coscinodiscus australis Karsten, 1905 accepted as Charcotiella australis (G.Karst) S.Blanco & C.E.Wetzel, 2016
Coscinodiscus bouvet Karsten, 1905 (uncertain > unassessed )
Coscinodiscus centralis Ehrenberg, 1844 (uncertain > unassessed )
Coscinodiscus centralis sensu O'Meara, 1876 (uncertain > unassessed )
Coscinodiscus curvatulus Grunow ex A.Schmidt, 1878
Coscinodiscus curvulatus
Coscinodiscus decipiens Grunow ex Van Heurck, 1882 (uncertain > unassessed )
Coscinodiscus dimorphus Castracane, 1886 (uncertain > unassessed )
Coscinodiscus divisus Grunow, 1878 (uncertain > unassessed )
Coscinodiscus divisus var. divisus Grunow, 1878 (uncertain > unassessed )
Coscinodiscus excentricus [sensu] Schmidt, 1874 (uncertain > unassessed )
Coscinodiscus excentricus Ehrenberg, 1840 accepted as Thalassiosira eccentrica (Ehrenberg) Cleve, 1904
Coscinodiscus furcatus Karsten, 1905 (uncertain > unassessed )
Coscinodiscus galapagensis (Grunow in Van Heurck) Rattray, 1890 accepted as Coscinodiscus griseus var. gallopagensis Grunow in Van Heurck, 1883
Coscinodiscus galapagensis Schmidt in Schmidt et al., 1888 (uncertain > unassessed )
Coscinodiscus gracilis Dolmatova in Dolmatova, Kuklina & Oreshkina, 1984 (uncertain > unassessed )
Coscinodiscus gracilis Karsten, 1905 (uncertain > unassessed )
Coscinodiscus griseus Greville
Coscinodiscus griseus var. gallopagensis Grunow in Van Heurck, 1883 (uncertain > unassessed )
Coscinodiscus gyratus Janisch, 1888 (uncertain > unassessed )
Coscinodiscus horridus Karsten, 1905 (uncertain > unassessed )
Coscinodiscus lacustris Grunow (uncertain > unassessed )
Coscinodiscus lentiginosus Janisch, 1874 accepted as Thalassiosira lentiginosa (Janisch) Fryxell, 1977 accepted as Coscinodiscus lentiginosus var. lentiginosus Janisch in Schmidt et al., 1878
Coscinodiscus lentiginosus var. lentiginosus Janisch in Schmidt et al., 1878 (uncertain > unassessed )
Coscinodiscus margaritae Frenguelli & Orlando, 1958 (unaccepted > nomen nudum )
Coscinodiscus marginatus Ehrenberg, 1844 (uncertain > unassessed )
Coscinodiscus marginatus var. latemarginata Pantocsek, 1886 (uncertain > unassessed )
Coscinodiscus minimus Karsten, 1905 (uncertain > unassessed )
Coscinodiscus minimus Schumann, 1867 (uncertain > unassessed )
Coscinodiscus nodulifer A.W.F.Schmidt, 1878 represented as Azpeitia nodulifera (A.W.F.Schmidt) G.A.Fryxell & P.A.Sims, 1986
Coscinodiscus normannicus Van Heurck, 1883 (uncertain > unassessed )
Coscinodiscus oculoides Karsten, 1905 (uncertain > unassessed )
Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg, 1840 (uncertain > unassessed )
Coscinodiscus opposites
Coscinodiscus oppositus Karsten, 1905 (uncertain > unassessed )
Coscinodiscus plicatus Grunow
Coscinodiscus polyradiatus Castracane, 1886 (uncertain > unassessed )
Coscinodiscus pseudodenticulatus Hustedt, 1958 (uncertain > unassessed )
Coscinodiscus radiatus Ehrenberg, 1840 (uncertain > unassessed )
Coscinodiscus radiatus J.W. Bailey, 1842 (uncertain > unassessed )
Coscinodiscus ritscheri Hustedt, 1958 (uncertain > unassessed )
Coscinodiscus robustus Greville, 1866
Coscinodiscus robustus var. latemarginata Pantocsek, 1886 (uncertain > unassessed )
Coscinodiscus sol C.G.Wallich, 1860 (uncertain > unassessed )
Coscinodiscus stellaris Tempère & Peragallo, 1912 (uncertain > unassessed )
Coscinodiscus stellaris var. stellaris Roper, 1858 (uncertain > unassessed )
Coscinodiscus subtilis Ehrenberg, 1841 (uncertain > unassessed )
Coscinodiscus subtilis Schmidt in Schmidt et al., 1878 (uncertain > unassessed )
Coscinodiscus tabularis Grunow, 1884 accepted as Azpeitia tabularis (Grunow) G.Fryxell & P.A.Sims, 1986 accepted as Coscinodiscus tabularis var. tabularis Grunow, 1884
Coscinodiscus tabularis var. tabularis Grunow, 1884 (uncertain > unassessed )
Coscinodiscus tumidus Janisch, 1874 accepted as Thalassiosira tumida (Janisch) Hasle, 1971 accepted as Coscinodiscus tumidus var. tumidus Janisch in Schmidt et al., 1878
Coscinodiscus tumidus var. tumidus Janisch in Schmidt et al., 1878 (uncertain > unassessed )
Coscinodiscus vulnificus Gombos, 1976 (uncertain > unassessed )
Hemidiscus cuneiformis Wallich, 1860
Hemidiscus karstenii A.P.Jousé, 1965 (uncertain > unassessed )
Hemidiscus ovalis (R.Gersonde) D.M.Harwood & T.Maruyama, 1992 accepted as Actinocyclus ingens var. ovalis R.Gersonde, 1990
Roperia tesselata (Roper) Grunow ex Pelletan, 1889
Stellarima microtrias (Ehrenberg) G.R.Hasle & P.A.Sims, 1986 accepted as Symbolophora microtrias Ehrenberg, 1844
Stellarima stellaris (Roper) G.R.Hasle & P.A.Sims, 1986 accepted as Coscinodiscus stellaris var. stellaris Roper, 1858