| Species | as Species | Doubtful |
|---|
Connected successfully| Acanthoica monospina Schiller, 1914 | | |
| Acanthoica ornata Conrad, 1928 | | |
| Acanthoica quattrospina Lohman, 1903 | | |
| Achnanthes brevipes C.A. Agardh, 1824 | | |
| Achnanthes longipes Agardh, 1824 | | |
| Actinastrum hantzschii Lagerheim, 1882 | | |
| Akashiwo sanguinea (K.Hirasaka) G.Hansen & Ø.Moestrup | | |
| Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985 | | |
| Amphidinium crassum Lohmann, 1908 | | |
| Amphora hyalina Kützing, 1844 | | |
| Anabaena kisselevii Proshkina-Lavrenko & Makarova, 1968 | | |
| Anabaena spiroides Klebahn, 1895 | | |
| Anabaenopsis nadsonii Woronichin | | |
| Anabaenopsis raciborskii Woloszynska 1912 | | |
| Anacanthoica acanthos (Schiller) Deflandre, 1952 | ''Acanthoica acanthos''; | |
| Anacanthoica lithostratos (Schiller) Norris, 1984 | ''Acanthoica lithostratos''; | |
| Aphanizomenon flos-aquae (Linnaeus) Ralfs ex Bornet & Flahault, 1888 | | |
| Ardissonea crystallina (C.A. Agardh) Grunow in Cleve & Grunow, 1880 | | |
| Asterionella formosa Hassall, 1850 | | |
| Attheya septentrionalis (Østrup) Crawford in Crawford et al., 1994 | | |
| Aulacoseira granulata (Ehrenberg) Simonsen, 1979 | | |
| Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 | ''Bacillaria paradoxa''; | |
| Bicosta spinifera (Throndsen, 1970) Leadbeater, 1978 | ''Salpingoeca spinifera''; | |
| Binuclearia lauterbornii (Schmidle) Proschkina-Lavrenko | | |
| Caloneis silicula (Ehrenberg) P.T. Cleve, 1894 | | |
| Calyptrosphaera insignis Sch. | | |
| Cerataulina pelagica (Cleve) Hendey, 1937 | | |
| Chaetoceros abnormis Proschkina-Lavrenko, 1953 | | |
| Chaetoceros affinis Lauder, 1864 | | |
| Chaetoceros anastomosans Grunow | | |
| Chaetoceros borgei Lemmermann, 1904 | | |
| Chaetoceros calcitrans (Paulsen) Takano, 1968 | ''Chaetoceros simplex var. calcitrans''; | |
| Chaetoceros curvisetus P.T. Cleve, 1889 | | |
| Chaetoceros danicus P.T.Cleve, 1889 | | |
| Chaetoceros decipiens P.T. Cleve, 1873 | | |
| Chaetoceros densus P.T. Cleve, 1901 | | |
| Chaetoceros diversus Cleve, 1873 | | |
| Chaetoceros fallax Prosckina-Lavrenko, 1955 | | |
| Chaetoceros heterovalvatus Prosckina-Lavrenko | | |
| Chaetoceros holsaticus Schütt, 1895 | | |
| Chaetoceros insignis Prosckina-Lavrenko | | |
| Chaetoceros laciniosus Schütt, 1895 | | |
| Chaetoceros lauderi Ralfs in Lauder, 1864 | | |
| Chaetoceros lorenzianus Grunow, 1863 | | |
| Chaetoceros mitra (J.W. Bailey) P.T. Cleve, 1896 | | |
| Chaetoceros muelleri Lemmermann, 1898 | | |
| Chaetoceros similis P.T. Cleve, 1896 | | |
| Chaetoceros similis f. solitarius Proschkina-Lavrenko | | |
| Chaetoceros simplex Ostenfeld, 1901 | | |
| Chaetoceros socialis Lauder, 1864 | | |
| Chaetoceros subtilis (Proschkina-Lavrenko) Proschkina-Lavrenko, 1961 | | |
| Chaetoceros wighamii Brightwell, 1856 | | |
| Chlorella vulgaris Beijerinck 1890 | | |
| Chroococcus dimidiatus (Kützing) Nägeli, 1849 | ''Gloeocapsa turgida''; | |
| Chroococcus minimus (von Keissler) Lemmermann, 1904 | ''Gloeocapsa minima''; | |
| Chroococcus minutus (Kützing) Nägeli, 1849 | ''Gloeocapsa minuta''; | |
| Cocconeis scutellum (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Cochlodinium citron Kofoid & Swezy, 1921 | | |
| Coelastrum astroideum De Notaris, 1867 | | |
| Coenochloris pyrenoidosa Korshikov, 1953 | | |
| Coscinodiscus granii Gough, 1905 | | |
| Coscinodiscus janischii Schmidt, 1878 | | |
| Coscinodiscus jonesianus (Greville) Ostenfeld, 1915 | | |
| Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg, 1854 | | |
| Coscinodiscus radiatus Ehrenberg, 1841 | | |
| Crucigenia fenestrata (Schmidle) Schmidle, 1900 | | |
| Crucigenia tetrapedia (Kirchner) W. & G.S. West, 1902 | | |
| Crucigeniella apiculata (Lemmermann) Komárek, 1974 | | |
| Cyclotella caspia Grunow, 1878 | | |
| Cyclotella chaetoceras Lemmermann | | |
| Cyclotella meneghiniana Kützing, 1844 | | |
| Cylindrotheca closterium (Ehrenberg) Reiman & Lewin, 1964 | | |
| Cymatopleura elliptica (Brébisson ex Kützing) W. Smith, 1851 | | |
| Dactyliosolen fragilissimus (Bergon) G. R. Hasle, 1991 | | |
| Dactylosphaerium jurisii Hindák | | |
| Desmodesmus communis (E.Hegewald) E.Hegewald | | |
| Detonula confervacea (P.T. Cleve) Gran, 1900 | | |
| Diatoma tenue C.A. Agardh, 1812 | | |
| Dictyocha fibula Ehrenberg | | |
| Dictyocha speculum Ehrenberg | | |
| Dictyocha triacantha Ehrenberg | | |
| Dictyochlorella reniformis (Korshikov) P.C.Silva | | |
| Dictyosphaerium pulchellum Wood, 1873 | | |
| Dinobryon balticum (Schütt) Lemmermann, 1900 | | |
| Dinophysis acuminata Claparède & Lachmann, 1859 | ''Dinophysis baltica''; | |
| Dinophysis acuta Ehrenberg, 1841 | | |
| Dinophysis caudata Saville-Kent, 1881 | | |
| Dinophysis hastata Stein, 1883 | | |
| Dinophysis ovata Claparède & Lachmann | | |
| Dinophysis sacculus Stein, 1883 | | |
| Diplopsalis acuta (Apstein) Entz 1904 | ''Peridinium latum''; | |
| Diplopsalis lenticula Bergh, 1881 | | |
| Ditylum brightwellii (T. West) Grunow in Van Heurck, 1883 | | |
| Ebria tripartita (Shumann) Lemmermann, 1899 | | |
| Emiliania huxleyi (Lohmann) Hay & Mohler, 1967 | | |
| Entomoneis alata (Ehrenberg) Ehrenberg, 1845 | ''Amphiprora alata''; | |
| Entomoneis paludosa (W. Smith) Reimer, 1975 | ''Amphiprora paludosa''; | |
| Euglena gracilis G.A. Klebs, 1883 | | |
| Euglena viridis (O.F. Müller) Ehrenberg, 1832 | | |
| Eutreptia lanowii Steuer, 1904 | | |
| Eutreptia viridis Perty | | |
| Glenodinium caspicum (Ostenfeld) J. Schiller | | |
| Glenodinium paululum Lindemann | | |
| Glenodinium pilula (Ostenfeld) Schiller | | |
| Gloeocapsa cohaerens (Brébisson) Golerbach | | |
| Golenkinia radiata Chodat, 1894 | | |
| Golenkiniopsis parvula (Woronichin) Korshikov | | |
| Golenkiniopsis solitaria (Korshikov) Korshikov | | |
| Gomphosphaeria aponina Kützing, 1836 | | |
| Gonyaulax apiculata (Pénard, 1891) Entz, 1904 | | |
| Gonyaulax cochlea Meunier, 1919 | | |
| Gonyaulax digitale (Pouchet, 1883) Kofoid, 1911 | | |
| Gonyaulax grindleyi Reinecke, 1967 | | |
| Gonyaulax minima Matzenauer, 1933 | | |
| Gonyaulax polygramma Stein, 1883 | | |
| Gonyaulax scrippsae Kofoid, 1911 | | |
| Gonyaulax spinifera (Claparède & Lachmann, 1859) Diesing, 1866 | | |
| Grammatophora marina (Lyngbye) Kützing, 1844 | | |
| Gymnodinium aeruginosum Stein | ''Gymnodinium viride''; | |
| Gymnodinium agile Kofoid et Swezy | | |
| Gymnodinium agiliforme Schiller, 1928 | | |
| Gymnodinium helveticum Penard 1891 | ''Glenodinium apiculatum''; | |
| Gymnodinium najadeum Schiller, 1928 | | |
| Gymnodinium neapolitanum Schiller, 1928 | | |
| Gymnodinium palustre A.J.Schilling, 1891 | | |
| Gymnodinium simplex (Lohmann, 1911) Koifoid & Swezy, 1921 | | |
| Gymnodinium wulffii Schiller, 1933 | | |
| Gyrodinium fusiforme Koifoid & Swezy, 1921 | | |
| Gyrodinium lachryma (Meunier, 1910) Kofoid & Swezy, 1921 | | |
| Gyrodinium pellucidum (Wulff, 1916) Schiller, 1933 | | |
| Gyrodinium spirale (Bergh, 1881) Kofoid et Swezy, 1921 | | |
| Gyrosigma kuetzingii (Grunow) Cleve | | |
| Halosphaera parkeae Boalch & Mommaerts | | |
| Heleochloris conica Korshikov | | |
| Hermesinum adriaticum O.Zacharias, 1906 | | |
| Heterocapsa triquetra (Ehrenberg, 1840) Stein, 1883 | | |
| Hyalodiscus ambiguus (Grun.) Temp. Et Perag. 1890 | | |
| Hyalodiscus scoticus (Kützing) Grunow, 1879 | | |
| Hyaloraphidium contortum Pascher & Korshikov | | |
| Kirchneriella lunaris (Kirchner) K. Möbius, 1894 | | |
| Kryptoperidinium foliaceum (Stein, 1883) Lindemann, 1924 | | |
| Lagerheimia longiseta (Lemmermann) Printz, 1914 | | |
| Lagerheimia subsalsa Lemmermann, 1898 | | |
| Lepocinclis spirogyroides (Ehrenberg) Marin & Melkonian | ''Euglena spirogyra''; | |
| Leptocylindrus danicus P.T. Cleve, 1889 | | |
| Leptocylindrus minimus Gran, 1915 | | |
| Leucocryptos marina (Braarud) Butcher, 1967 | | |
| Licmophora ehrenbergii (Kützing) Grunow, 1867 | | |
| Licmophora flabellata C. Agardh, 1830 | | |
| Limnococcus limneticus (Lemmermann) Komárková, Jezberová, Komárek & Zapomělová, 2010 | ''Gloeocapsa limnetica''; | |
| Limnothrix planctonica (Woloszynska) Meffert, 1988 | ''Oscillatoria planctonica''; | |
| Lingulodinium polyedrum (Stein, 1883) Dodge, 1989 | | |
| Lohmannosphaera adriatica Sch. | | |
| Melosira moniliformis (O.F. Müller) C. Agardh, 1824 | | |
| Melosira varians C.A. Agardh, 1827 | | |
| Merismopedia glauca (Ehrenberg) Kützing, 1845 | | |
| Merismopedia minima Beck, 1897 | | |
| Merismopedia punctata Meyen, 1939 | | |
| Micractinium crassisetum Hortobágyi | | |
| Micractinium pusillum Fresenius, 1858 | | |
| Micractinium quadrisetum (Lemmermann) G.M. Smith, 1916 | | |
| Microcystis aeruginosa (Kützing) Kützing, 1846 | | |
| Microcystis pulverea (Wood) Forti in De Toni, 1907 sensu auct. | | |
| Monoraphidium arcuatum (Korshikov) Hindák, 1970 | | |
| Monoraphidium contortum (Thuret) Komàrková-Legnerová, 1969 | | |
| Monoraphidium komarkovae Nygaard, 1979 | | |
| Monoraphidium tortile (W.West & G.S.West) Komárková-Legnerová | | |
| Navicula cancellata Donkin, 1872 | | |
| Navicula pennata A. Schmidt, 1876 | | |
| Neoceratium furca (Ehrenberg) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium furca''; | |
| Neoceratium fusus (Ehrenberg) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium fusus''; | |
| Neoceratium tripos (O.F.Müller) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium tripos''; | |
| Nitzschia acicularis (Kützing) W. Smith, 1853 | | |
| Nitzschia holsatica Hust | | |
| Nitzschia incerta (Grunow) M.Peragallo 1903 | ''Nitzschia reversa''; | |
| Nitzschia longissima (Brébisson in Kützing) Ralfs in Pritchard, 1861 | | |
| Nitzschia lorenziana Grunow in Cleve & Grunow, 1880 | | |
| Nitzschia sigmoidea (Ehrenberg) W. Smith | | |
| Nitzschia tenuirostris Mer. | | |
| Ochromonas minima Throndsen, 1969 | | |
| Ochromonas oblonga N.Carter, 1937 | | |
| Oocystis borgei J. Snow, 1903 | | |
| Oocystis lacustris Chodat, 1897 | | |
| Oscillatoria kisselevii Anissimova 1949 | | |
| Oscillatoria margaritifera Kützing ex Gomont, 1892 | | |
| Palusphaera vandeli Lecal, 1967 | ''Rhabdosphaera longistylis''; | |
| Paralia sulcata (Ehrenberg) P.T. Cleve, 1873 | | |
| Pediastrum duplex Meyen, 1829 | | |
| Peridiniella danica (Paulsen, 1907) Okolodkov et Dogde, 1995 | | |
| Peridiniopsis oculatum (F.Stein) Bourrelly, 1968 | ''Glenodinium oculatum''; | |
| Peridinium bipes Stein | | |
| Peridinium umbonatum F. Stein, 1883 | ''Peridinium pusillum''; | |
| Peridinium verrucosum A.F.Meunier | | |
| Phaeocystis pouchetii (M.P. Hariot, 1892) G. Lagerheim, 1896 | | |
| Phalacroma rotundata (Claparéde & Lachmann) Kofoid & Michener, 1911 | ''Dinophysis rotundata''; | |
| Pleurosigma elongatum W. Smith, 1852 | | |
| Polykrikos kofoidii Chatton, 1914 | | |
| Polykrikos schwartzii Bütschli 1873 | | |
| Pontosphaera nigra Schiller | | |
| Proboscia alata (Brightwell) Sundström, 1986 | | |
| Prorocentrum compressum (Bailey, 1850) Abé ex Dodge, 1975 | | |
| Prorocentrum cordatum (Ostenfeld, 1901) Dodge, 1975 | | |
| Prorocentrum micans Ehrenberg, 1834 | | |
| Protoperidinium bipes (Paulsen, 1904) Balech, 1974 | ''Minuscula bipes''; | |
| Protoperidinium breve Paulsen, 1907 | | |
| Protoperidinium brevipes (Paulsen, 1908) Balech, 1974 | | |
| Protoperidinium conicum (Gran, 1900) Balech, 1974 | | |
| Protoperidinium crassipes (Kofoid, 1907) Balech, 1974 | | |
| Protoperidinium curvipes (Ostenfeld, 1906) Balech, 1974 | | |
| Protoperidinium decipiens (Jørgensen, 1899) Parke et Dodge, 1976 | | |
| Protoperidinium divergens (Ehrenberg, 1841) Balech, 1974 | | |
| Protoperidinium excentricum (Paulsen, 1907) Balech, 1974 | ''Peridinium excentricum''; | |
| Protoperidinium granii (Ostenfield, 1906) Balech, 1974 | | |
| Protoperidinium leonis (Pavillard, 1916) Balech, 1974 | ''Peridinium leonis''; | |
| Protoperidinium pellucidum Bergh, 1882 | | |
| Protoperidinium pentagonum (Gran, 1902) Balech, 1974 | ''Peridinium pentagonum''; | |
| Protoperidinium solidicorne (Mangin, 1922) Balech, 1974 | | |
| Protoperidinium steinii (Jörgensen, 1899) Balech, 1974 | | |
| Pseudo-nitzschia delicatissima (P.T. Cleve, 1897) Heiden, 1928 | | |
| Pseudo-nitzschia seriata (P.T. Cleve, 1883) H. & M. Peragallo, 1900 | | |
| Pseudopedinella pyriformis N. Carter, 1937 | also ''Pseudopedinella variabilis''; | |
| Pseudoschroederia robusta (O.Korshikov) E.Hegewald & E.Schnepf | ''Schroederia robusta''; | |
| Pseudosolenia calcar-avis (Schultze) Sundström, 1986 | | |
| Pyramimonas amylifera Conrad, 1939 | | |
| Pyramimonas obovata N. Carter, 1937 | | |
| Pyrophacus horologicum Stein, 1883 | | |
| Rhabdosphaera claviger Murray & Blackman, 1898 | ''Rhabdosphaera stylifer''; | |
| Rhabdosphaera hispida Lohmann | | |
| Rhopalodia musculus (Kützing) O.F. Müller, 1900 | | |
| Scenedesmus abundans (O. Kirchner) Chodat, 1913 | ''Scenedesmus sempervirens''; | |
| Scenedesmus acuminatus (Lagerheim) Chodat, 1902 | also ''Scenedesmus falcatus''; | |
| Scenedesmus arcuatus Lemmermann, 1899 | | |
| Scenedesmus armatus (R. Chodat) R. Chodat, 1913 | | |
| Scenedesmus ellipticus Corda, 1835 | | |
| Scenedesmus insignis (West) Chodat, 1913 | | |
| Scenedesmus intermedius Chodat, 1926 | | |
| Scenedesmus magnus Meyen, 1829 | | |
| Scenedesmus obliquus (Turpin) Kützing, 1833 | ''Scenedesmus acutus''; | |
| Scenedesmus opoliensis P.G.Richter 1897 | | |
| Scenedesmus soli Hortobagyi, 1959 | | |
| Scenedesmus spinosus Chodat | | |
| Scenedesmus verrucosus Y.V.Roll | ''Scenedesmus disciformis''; | |
| Schroederia setigera (Schröder) Lemmermann, 1898 | | |
| Scrippsiella trochoidea (Stein, 1883) Balech ex Loeblich III, 1965 | | |
| Selenastrum gracile Reinsch, 1867 | | |
| Skeletonema costatum (Greville) P.T. Cleve, 1878 | | |
| Skeletonema subsalsum (A.Cleve) Bethge, 1928 | | |
| Snowella lacustris (Chodat) Komárek & Hindák, 1988 | ''Gomphosphaeria lacustris''; | |
| Stephanodiscus hantzschii Grunow in P.T. Cleve & Grunow, 1880 | | |
| Striatella delicatula (Kützing) Grunow ex Van Heurck, 1881 | | |
| Striatella interrupta (Ehrenb.) Grunow., 1862 | | |
| Surirella fastuosa (Ehrenberg) Kützing, 1844 | | |
| Teleaulax amphioxeia (Conrad) Hill | ''Rhodomonas amphioxeia''; | |
| Tetraselmis viridis (Roukhiyajnen) R.E.Norris, Hori & Chihara 1980 | | |
| Tetrastrum elegans Playfair | | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | | |
| Thalassiosira anguste-lineata (A. Schmidt) Fryxell et Hasle, 1977 | | |
| Thalassiosira baltica (Grunow in P.T. Cleve & Grunow) Ostenfeld, 1901 | | |
| Thalassiosira eccentrica (Ehrenberg) P.T. Cleve, 1903-1904 | | |
| Thalassiosira nordenskioeldii P.T. Cleve, 1873 | | |
| Thalassiosira parva Proshk.-Lavr., 1955 | | |
| Thalassiothrix mediterranea Pavillard | | |