| Species | as Species | Doubtful |
|---|
Connected successfully| Acanthoica coronata Lohmann, 1903 | | |
| Acanthoica monospina Schiller, 1914 | | |
| Acanthoica quattrospina Lohman, 1903 | | |
| Achnanthes brevipes C.A. Agardh, 1824 | | |
| Achnanthes brevipes var. intermedia (Kützing) P.T. Cleve, 1895 | | |
| Achnanthes longipes Agardh, 1824 | | |
| Achnanthes parvula Kützing, 1844 | also ''Achnanthes brevipes var. parvula''; | |
| Achradina pulchra Lohmann, 1902 | | |
| Actinastrum hantzschii Lagerheim, 1882 | | |
| Actinastrum hantzschii var. subtile J.Woloszynska | | |
| Actinocyclus octonarius Ehrenberg, 1838 | ''Actinocyclus ehrenbergii''; | |
| Actinocyclus octonarius var. crassus (W. Smith) Hendey, 1954 | ''Actinocyclus ehrenbergii var. crassus''; | |
| Actinocyclus octonarius var. tenellus (Brébisson) Hendey, 1954 | ''Actinocyclus ehrenbergii var. tenellus''; | |
| Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 | ''Actinoptychus undulates''; | |
| Akashiwo sanguinea (K.Hirasaka) G.Hansen & Ø.Moestrup | also ''Gymnodinium sanguineum''; | |
| Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985 | | |
| Alexandrium pseudogonyaulax (Biecheler, 1952) Horiguchi, 1983 ex Kita & Fukuyo, 1992 | | |
| Alexandrium tamarense (Lebour, 1925) Balech, 1985 | | |
| Amphidinium acutissimum Schiller, 1933 | | |
| Amphidinium amphidinioides (Geitler) Schiller, 1932 | ''Amphidinium vigrense''; | |
| Amphidinium conradii (Conrad, 1926) Schiller, 1933 | | |
| Amphidinium crassum Lohmann, 1908 | | |
| Amphidinium inflatum Kofoid, 1931 | | |
| Amphidinium lanceolatum Schröder, 1911 | | |
| Amphidinium longum Lohmann, 1908 | | |
| Amphidinium operculatum Claparède & Lachmann, 1859 | | |
| Amphidinium turbo Kofoid et Swezy, 1921 | | |
| Amphora angularis var. delicatula A.I.Proshkina-Lavrenko, 1963 | | |
| Amphora angusta Gregory, 1857 | | |
| Amphora bigibba Grun. Ex A. Schmidt, 1875 | | |
| Amphora coffeaeformis (C. Agardh) Kützing, 1844 | | |
| Amphora granulata var. costata Proshkina-Lavrenko, 1963 | | |
| Amphora granulata var. punctata Proshkina-Lavrenko, 1963 | | |
| Amphora hyalina Kützing, 1844 | | |
| Amphora hyalina var. delicatula Proshkina-Lavrenko | | |
| Amphora proteus Gregory, 1857 | | |
| Amylax triacantha (Jörgensen, 1899) Sournia, 1984 | | |
| Anabaena kisseleviana | | |
| Anabaena knipowitscii Ussachev | | |
| Anabaena spiroides Klebahn, 1895 | | |
| Anabaena spiroides var. contracta Klebahn 1895 | ''Anabaena spiroides f. contracta'' (Kleb.) Elenk., 1938; | |
| Anabaenopsis nadsonii Woronichin | | |
| Anacanthoica acanthos (Schiller) Deflandre, 1952 | ''Acanthoica acanthos''; | |
| Ankistrodesmus falcatus (Corda) Ralfs, 1848 | | |
| Ankistrodesmus spiralis (W.B. Turner) Lemmerman, 1908 | | |
| Ankyra ocellata (Korshikov) Fott | | |
| Apedinella radians (Lohmann) Campbell, 1973 | ''Apedinella spinifera''; | |
| Aphanizomenon flos-aquae (Linnaeus) Ralfs ex Bornet & Flahault, 1888 | also ''Anabaena flos-aquae''; | |
| Aphanocapsa incerta (Lemmermann) Cronberg & Komárek 1994 | ''Microcystis pulverea f. incerta''; | |
| Aphanothece stagnina (Sprengel) A. Braun in Rabenhorst 1865 | | |
| Archaeperidinium minutum (Kofoid) Jorgensen, 1912 | ''Protoperidinium minutum''; | |
| Ardissonea crystallina (C.A. Agardh) Grunow in Cleve & Grunow, 1880 | | |
| Ardissonea fulgens (Greville) Grunow in Cleve & Grunow, 1880 | | |
| Asterionella formosa Hassall, 1850 | | |
| Asteromphalus robustus Castracane, 1875 | | |
| Attheya decora T. West, 1860 | | |
| Attheya septentrionalis (Østrup) Crawford in Crawford et al., 1994 | ''Chaetoceros septentrionalis''; | |
| Aulacoseira granulata (Ehrenberg) Simonsen, 1979 | | |
| Aulacoseira islandica (O.Müller) Simonsen, 1979 | | |
| Aulacoseira italica (Ehrenberg) Simonsen 1979 | | |
| Aulacoseira italica var. tenuissima Grun. In Van Heurck, 1882 | | |
| Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 | ''Bacillaria paradoxa''; | |
| Bacillaria socialis var. baltica Grunow | | |
| Bacteriastrum delicatulum Cleve, 1897 | | |
| Bacteriastrum hyalinum Lauder, 1864 | | |
| Belonastrum berolinensis (Lemmermann) Round & Maidana 2001 | ''Staurosirella berolinensis''; | |
| Bicosta spinifera (Throndsen, 1970) Leadbeater, 1978 | | |
| Binuclearia lauterbornii (Schmidle) Proschkina-Lavrenko | | |
| Bysmatrum subsalsum (Ostenfeld, 1908) M.A.Faust & K.A.Steidinger, 1998 | ''Scrippsiella subsalsa''; | Doubtful |
| Calyptrosphaera incisa Schill. | | |
| Calyptrosphaera insignis Sch. | | |
| Calyptrosphaera oblonga Lohman, 1902 | | |
| Campylodiscus echeneis Ehrenberg ex Kützing, 1844 | | |
| Campylodiscus fastuosus Ehrenberg, 1845 | ''Campylodiscus thuretii''; | |
| Campylodiscus thuretii var. lineolatum Pr.-Lavr., 1955 | | |
| Cerataulina pelagica (Cleve) Hendey, 1937 | | |
| Ceratium fusus var. seta (Ehrenberg) Sournia, 1966 | | |
| Chaetoceros abnormis Proschkina-Lavrenko, 1953 | | |
| Chaetoceros affinis Lauder, 1864 | | |
| Chaetoceros affinis f. schutii | | |
| Chaetoceros anastomosans Grunow | | |
| Chaetoceros borgei Lemmermann, 1904 | | |
| Chaetoceros breve Schütt, 1895 | ''Chaetoceros brevis''; | |
| Chaetoceros calcitrans (Paulsen) Takano, 1968 | ''Chaetoceros simplex var. calcitrans''; | |
| Chaetoceros ceratosporus Ostenfeld, 1910 | | |
| Chaetoceros compressus Lauder, 1864 | | |
| Chaetoceros coronatus Gran, 1897 | | |
| Chaetoceros curvisetus P.T. Cleve, 1889 | | |
| Chaetoceros danicus P.T.Cleve, 1889 | | |
| Chaetoceros densus P.T. Cleve, 1901 | | |
| Chaetoceros diadema (Ehrenberg) Gran, 1897 | ''Chaetoceros subsecundus''; | |
| Chaetoceros diversicurvatus Van Goor, 1924 | | Doubtful |
| Chaetoceros dubius Pr.-Lavrenko | | |
| Chaetoceros fallax Prosckina-Lavrenko, 1955 | | |
| Chaetoceros heterovalvatus Prosckina-Lavrenko | | |
| Chaetoceros holsaticus Schütt, 1895 | | |
| Chaetoceros insignis Prosckina-Lavrenko | | |
| Chaetoceros karianus Grunow, 1880 | | |
| Chaetoceros laciniosus Schütt, 1895 | | |
| Chaetoceros lauderi Ralfs in Lauder, 1864 | | |
| Chaetoceros lorenzianus Grunow, 1863 | | |
| Chaetoceros lorenzianus f. subsalinus Proshkina-Lavrenko | | |
| Chaetoceros lorenzianus var. solitarius Proshkina-Lavrenko | | |
| Chaetoceros minutissima I.V.Makarova & A.I.Proshkina-Lavrenko | ''Chaetoceros minutissimus''; | |
| Chaetoceros muelleri Lemmermann, 1898 | | |
| Chaetoceros neogracilis VanLand., 1968 | ''Chaetoceros gracilis''; | |
| Chaetoceros paulsenii Ostenfeld, 1901 | | |
| Chaetoceros peruvianus Brightw. | | |
| Chaetoceros rigidus Ostenfeld | | |
| Chaetoceros scabrosus Prosckina-Lavrenko | | |
| Chaetoceros seiracanthus Gran, 1897 | | |
| 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 subtilis var. abnormis f. simplex | | |
| Chaetoceros teres P.T. Cleve, 1896 | | |
| Chaetoceros wighamii Brightwell, 1856 | | |
| Chaetoceros willei Grunow, 1897 | ''Chaetoceros affinis var. willei''; | |
| Chlamydomonas perpusilla Gerloff | ''Chlamydomonas minima''; | |
| Chlorolobion braunii (Nägeli) Komàrek 1979 | | |
| Chloromonas cuneata | | |
| Chlorotetraedron incus (Teiling) Komárek & Kovácik, 1985 | ''Tetraedron incus''; | |
| Chroococcus dimidiatus (Kützing) Nägeli, 1849 | ''Gloeocapsa turgida''; | |
| Chroococcus minimus (von Keissler) Lemmermann, 1904 | ''Gloeocapsa minima''; | |
| Chroococcus minutus (Kützing) Nägeli, 1849 | ''Gloeocapsa minuta''; | |
| Climaconeis inflexa (Brébisson ex Kützing) E.J.Cox, 1982 | ''Amphora inflexa''; | |
| Closteriopsis longissima (Lemmermann) Lemmermann 1899 | | |
| Closterium exiguum West & G.S.West, 1902 | | |
| Closterium leibleinii Kützing ex Ralfs 1848 | | |
| Cocconeis maxima (Grun.) H. et M. Perag. 1897 | | |
| Cocconeis pediculus Ehrenberg, 1838 | | |
| Cocconeis scutellum (Grunow in Van Heurck) P.T. Cleve, 1896 | ''Cocconeis scutellum var. scutellum''; | |
| Cocconeis scutellum var. minutissima Grunow in Van Heurck, 1880 | | |
| Cocconeis scutellum var. parva (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Cochlodinium adriaticum Schiller, 1933 | ''Gyrodinium adriaticum''; | |
| Cochlodinium citron Kofoid & Swezy, 1921 | | |
| Cochlodinium geminatum (Schütt, 1895) Schütt, 1896 | | |
| Cochlodinium helicoides Lebour, 1925 | also ''Cochlodinium helix''; | |
| Cochlodinium pirum (Schütt, 1895) Lemmermann, 1899 | | |
| Cochlodinium polykrikoides Margalef, 1961 | | |
| Cochlodinium pupa Lebour, 1925 | | |
| Coelastrum microporum Nägeli in A. Braun, 1855 | | |
| Coelastrum pseudomicroporum Korshikov 1953 | | |
| Coelastrum sphaericum Nägeli, 1849 | | |
| Coelosphaerium kuetzingianum Nägeli, 1849 | | |
| Coenococcus planctonicus Korshikov 1953 | | |
| Coenococcus polycoccus (Korshikov) Hindák 1977 | | |
| Coenocystis reniformis Korshikov | | |
| Coronosphaera mediterranea (Lohmann, 1902) Gaarder, 1977 | ''Syracosphaera mediterranea''; | |
| Coscinodiscus apiculatus Ehrenberg, 1844 | | |
| Coscinodiscus commutatus Grunow, 1884 | ''Coscinodiscus jonesianus var. commutatus''; | |
| Coscinodiscus gigas Ehrenb. 1841 | | |
| Coscinodiscus granii Gough, 1905 | | |
| Coscinodiscus granii var. aralensis (Ostenfeld 1908) Hustedt | | |
| Coscinodiscus janischii Schmidt, 1878 | | |
| Coscinodiscus jonesianus (Greville) Ostenfeld, 1915 | | |
| Coscinodiscus lacustris Grunow in Cleve & Grunow, 1880 | | |
| Coscinodiscus perforatus (Forti) Hust., 1928 | | |
| Coscinodiscus perforatus var. cellulosus Grun., 1844 | | |
| Coscinodiscus perforatus var. pavillardii (Forti) Hust., 1928 | | |
| Coscinodiscus radiatus Ehrenberg, 1841 | | |
| Cosmioneis pusilla (W. Smith) D.G. Mann & A.J. Stickle, 1990 | | |
| Craticula cuspidata (Kutzing) D.G. Mann in Round, Crawford & Mann, 1990 | | |
| Craticula halophila (Grunow ex Van Heurck) D.G. Mann in Round et al., 1990 | ''Navicula halophila''; | |
| Crucigenia tetrapedia (Kirchner) W. & G.S. West, 1902 | | |
| Crucigeniella apiculata (Lemmermann) Komárek, 1974 | | |
| Crucigeniella irregularis (Wille) Tsarenko & D.M.John in D.M. John & Tsarenko, 2002 | ''Willea irregularis''; | |
| Crucigeniella rectangularis (Nägeli) Komárek, 1974 | | |
| Cryptomonas erosa Ehrenberg, 1832 | | |
| Cyclostephanos dubius (Fricke) Round in Theriot et al., 1988 | | |
| Cyclotella caspia Grunow, 1878 | | |
| Cyclotella chaetoceras Lemmermann | | |
| Cyclotella kuetzingiana Thwaites, 1848 | | |
| Cyclotella meneghiniana Kützing, 1844 | | |
| Cyclotella planctonica Brunnthaler 1901 | | |
| Cymatopleura solea (Brébisson) W. Smith, 1851 | | |
| Cymbella cymbiformis C.A. Agardh, 1830 | | |
| Cystodinium bataviense Klebs 1912 | | |
| Dactyliosolen fragilissimus (Bergon) G. R. Hasle, 1991 | ''Rhizosolenia fragillissima''; | |
| Dactylosphaerium jurisii Hindák | | |
| Desmodesmus perforatus (Lemmermann) E.Hegewald | ''Scenedesmus perforatus''; | |
| Desmodesmus tropicus var. longiclathratus | ''Scenedesmus perforatus var. ornatus f. cornutus''; | |
| Detonula confervacea (P.T. Cleve) Gran, 1900 | | |
| Diatoma elongatum var. actinastroides Krieger, 1927 | | |
| Diatoma tenue C.A. Agardh, 1812 | ''Diatoma elongatum''; | |
| Diatoma vulgare Bory de Saint-Vincent, 1824 | | |
| Dictyocha crux Ehrenberg, 1840 | | |
| Dictyocha fibula Ehrenberg | | |
| Dictyocha speculum Ehrenberg | | |
| Dictyocha speculum var. octonarius (Ehrenberg) F.J.Taylor | | |
| Dictyosphaerium chlorelloides (Nauman) Komárek & Perman 1978 | | |
| Dictyosphaerium ehrenbergianum Nägeli, 1849 | | |
| Dictyosphaerium granulatum Hindák 1977 | | |
| Dictyosphaerium pulchellum Wood, 1873 | | |
| Dinobryon balticum (Schütt) Lemmermann, 1900 | ''Dinobryon pellucidum''; | |
| Dinobryon borgei Lemmermann 1900 | | |
| Dinobryon sertularia Ehrenberg, 1834 | | |
| Dinophysis acuminata Claparède & Lachmann, 1859 | also ''Dinophysis baltica''; | |
| Dinophysis acuta Ehrenberg, 1841 | | |
| Dinophysis amandula (Balech, 1967) Sournia, 1973 | | |
| Dinophysis arctica Mereschkowsky, 1879 | | |
| Dinophysis caudata Saville-Kent, 1881 | | |
| Dinophysis fortii Pavillard, 1923 | | |
| Dinophysis islandica Paulsen, 1949 | | |
| Dinophysis minuta (Cleve, 1900) Balech, 1967 | | |
| Dinophysis norvegica Claparède & Lachmann, 1859 | | |
| Dinophysis ovum Schütt, 1895 | | |
| Dinophysis recurva Kofoid & Skogsberg, 1928 | | |
| Dinophysis sacculus Stein, 1883 | | |
| Dinophysis sphaerica Stein 1883 | | |
| Diploneis notabilis var. tenera Proshkina-Lavrenko | | |
| Diploneis smithii (Brébisson in W. Smith) P.T. Cleve, 1894 | | |
| Diplopsalis acuta (Apstein) Entz 1904 | ''Peridinium latum''; | |
| Diplopsalis lenticula Bergh, 1881 | | |
| Diplopsalopsis orbicularis (Paulsen, 1907) Meunier, 1910 | ''Peridinium orbiculare''; | |
| Discosphaera tubifera (Murray & Blackman) Ostenfeld 1900 | ''Discosphaera tubifer''; | |
| Ditylum brightwellii (T. West) Grunow in Van Heurck, 1883 | | |
| Ebria tripartita (Shumann) Lemmermann, 1899 | | |
| Emiliania huxleyi (Lohmann) Hay & Mohler, 1967 | | |
| Enallax acutiformis (B.Schröder) F.Hindák 1990 | ''Scenedesmus acutiformis''; | |
| Encyonema minutum (Hilse in Rabenhorst) D.G. Mann in Round et al., 1990 | | |
| Encyonema silesiacum (Bleisch) D.G.Mann in Round, Crawford & Mann, 1990 | | |
| Entomoneis alata (Ehrenberg) Ehrenberg, 1845 | | |
| Entomoneis paludosa (W. Smith) Reimer, 1975 | | |
| Eudorina elegans Ehrenberg, 1832 | | |
| Euglena charkoviensis Swirenko 1915 | | |
| Euglena granulata (G.A. Klebs) Schmitz, 1884 | | |
| Euglena oxyuris Schmarda, 1846 | | |
| Euglena pisciformis G.A. Klebs, 1883 | | |
| Euglena proxima Dangeard, 1901 | | |
| Euglena viridis (O.F. Müller) Ehrenberg, 1832 | | |
| Eutreptia globulifera Van Goor, 1925 | | |
| Eutreptia lanowii Steuer, 1904 | | |
| Eutreptia viridis Perty | | |
| Fallacia forcipata (Grev.) Stickle & D.G. Mann, 1990 | | |
| Fragilaria capucina Desmazières, 1825 | | |
| Fragilaria crotonensis Kitton, 1869 | | |
| Fragilariforma virescens (Ralfs) Williams & Round, 1988 | | |
| Glenodiniopsis steinii (Lemmermann) Woloszynska, 1916 | ''Sphaerodinium cinctum'' and ''Sphaerodinium limneticum''; | |
| Glenodinium behningii (Lindemann, 1927) Kisseleva | | |
| Glenodinium caspicum (Ostenfeld) J. Schiller | | |
| Glenodinium inflatum Meunier | | |
| Glenodinium obliquum Pouchet | | |
| Glenodinium paululum Lindemann | | |
| Glenodinium pilula (Ostenfeld) Schiller | | |
| Glenodinium pulvisculus (Ehrenberg) Stein | | |
| Glochidinium pernardiforme (Lindemann) Boltovskoy, 1999 | ''Peridiniopsis pernardiforme'' (Lindemann) Bourrelly; | |
| Gloeocapsa minor (Kutzing) Hollerbach | | |
| Golenkinia radiata Chodat, 1894 | | |
| Golenkiniopsis parvula (Woronichin) Korshikov | | |
| Gomphonema olivaceum (Hornemann) Brébisson, 1838 | ''Gomphoneis olivaceum''; | |
| Gomphonema olivaceum var. minutissimum Hustedt | ''Gomphoneis olivaceum var. minitissimum''; | |
| Gomphosphaeria aponina Kützing, 1836 | | |
| Gomphosphaeria virieuxii Komárek & Hindák 1988 | ''Gomphosphaeria aponina var. delicatula''; | |
| Goniodoma polyedricum (Pouchet, 1883) Jørgensen, 1899 | | |
| Gonium pectorale O.F.Müller 1773 | | |
| Gonyaulax cochlea Meunier, 1919 | | |
| Gonyaulax diegensis Kofoid, 1911 | | |
| Gonyaulax digitale (Pouchet, 1883) Kofoid, 1911 | | |
| Gonyaulax minima Matzenauer, 1933 | | |
| Gonyaulax polygramma Stein, 1883 | | |
| Gonyaulax scrippsae Kofoid, 1911 | | |
| Gonyaulax spinifera (Claparède & Lachmann, 1859) Diesing, 1866 | | |
| Gonyaulax verior Sournia, 1973 | | |
| Gonyostomum depressum (Lauterborn) Lemmermann | | |
| Grammatophora marina (Lyngbye) Kützing, 1844 | | |
| Grammatophora oceanica Ehrenberg, 1841 | | |
| Grammatophora serpentina (Ralfs) Ehrenberg | | |
| Granulocystopsis coronata (Lemmermann) Hindák 1977 | | |
| Guinardia striata (Stoltherfoth) Hasle, 1997 | ''Rhizosolenia stolterfothii''; | |
| Gymnodinium aeruginosum Stein | | |
| Gymnodinium agile Kofoid et Swezy | | |
| Gymnodinium agiliforme Schiller, 1928 | | |
| Gymnodinium arcticum Wulff, 1916 | | |
| Gymnodinium arcuatum Kofoid, 1931 | | |
| Gymnodinium excavatum Van Meel, 1969 | | |
| Gymnodinium frigidum Balech, 1965 | | |
| Gymnodinium fuscum (Ehrenberg, 1834) Stein, 1883 | | |
| Gymnodinium fusus Schütt, 1896 | | |
| Gymnodinium grammaticum (Pouchet, 1887) Kofoid & Swezy, 1921 | | |
| Gymnodinium heterostriatum Kofoid & Swezy, 1921 | | |
| Gymnodinium impudicum (S.Fraga & I.Bravo) G.Hansen & Ø.Moestrup, 2000 | ''Gyrodinium impudicum''; | |
| Gymnodinium lacustre Schiller, 1933 | | |
| Gymnodinium marinum Saville-Kent, 1881 | | |
| Gymnodinium minor Lebour | | |
| Gymnodinium najadeum Schiller, 1928 | | |
| Gymnodinium neapolitanum Schiller, 1928 | | |
| Gymnodinium paradoxum Schilling, 1891 | | |
| Gymnodinium pygmaeum Lebour, 1925 | | |
| Gymnodinium rhomboides Schütt, 1895 | | |
| Gymnodinium simplex (Lohmann, 1911) Koifoid & Swezy, 1921 | | |
| Gymnodinium sphaericum (Calkins, 1902) Kofoid & Swezy, 1921 | | |
| Gymnodinium stellatum Hulbult, 1957 | | |
| Gymnodinium sulcatum Kofoid & Swezy, 1921 | | |
| Gymnodinium uberrimum (G.J. Allman) Kofoid & Swezy, 1921 | also ''Gymnodinium mirabile''; | |
| Gymnodinium variabile Herdman, 1924 | | |
| Gymnodinium wulffii Schiller, 1933 | | |
| Gyrodinium aureolum Hulbert, 1957 | | |
| Gyrodinium cornutum (Pouchet, 1885) Kofoid & Swezy, 1921 | | |
| Gyrodinium fissum (Levander, 1894) Kofoid & Swezy, 1921 | | |
| Gyrodinium fusiforme Koifoid & Swezy, 1921 | | |
| Gyrodinium lachryma (Meunier, 1910) Kofoid & Swezy, 1921 | | |
| Gyrodinium nasutum (Wulff, 1916) Schiller, 1933 | | |
| Gyrodinium ovum (Schütt, 1895) Kofoid & Swezy, 1921 | | |
| Gyrodinium pingue (Schütt, 1895) Kofoid et Swezy, 1921 | | |
| Gyrodinium spirale (Bergh, 1881) Kofoid et Swezy, 1921 | | |
| Gyrosigma acuminatum (Kützing) Rabenhorst, 1853 | | |
| Gyrosigma distortum (W. Smith) Griffith & Henfrey, 1856 | | |
| Gyrosigma distortum var. parkeri (Harrison) Cleve, 1894 | | |
| Gyrosigma kuetzingii (Grunow) Cleve | | |
| Gyrosigma scalproides (Rabenhorst) Cleve, 1894 | | |
| Gyrosigma spenceri (J.W. Bailey ex Quekett) Griffith & Henfrey, 1856 | | |
| Halamphora angularis (Gregory) Levkov, 2009 | ''Amphora angularis''; | |
| Halamphora granulata Gregory, 1857 | ''Amphora granulata''; | |
| Hantzschia amphioxys (Ehrenberg) Grunow in Cleve & Grunow, 1880 | | |
| Helladosphaera cornifera (Schiller, 1913) Kamptner, 1937 | ''Syracosphaera cornifera''; | |
| Hemiaulus hauckii Grunow in Van Heurck, 1882 | | |
| Hermesinum adriaticum O.Zacharias, 1906 | | |
| Heterocapsa rotundata (Lohmann, 1908) G. Hansen, 1995 | ''Katodinium rotundatum''; | |
| Heterocapsa triquetra (Ehrenberg, 1840) Stein, 1883 | | |
| Hillea fusiformis (Schiller) Schiller, 1925 | | |
| Hyalodiscus ambiguus (Grun.) Temp. Et Perag. 1890 | | |
| Hyalodiscus scoticus (Kützing) Grunow, 1879 | | |
| Hyaloraphidium contortum Pascher & Korshikov | | |
| Hyaloraphidium contortum var. tenuissimum Korshikov | ''Hyaloraphidium contortum var. tenuissimus''; | |
| Katodinium fungiforme (Anisimova) Loeblich III, 1965 | also ''Gymnodinium blax''; | |
| Kephyrion rubri-claustri Conrad 1939 | ''Kephyrion rubri-claustri'' Conr., 1933; | |
| Kirchneriella lunaris (Kirchner) K. Möbius, 1894 | | |
| Kryptoperidinium foliaceum (Stein, 1883) Lindemann, 1924 | | |
| Lagerheimia ciliata (Lagerheim) Chodat 1895 | | |
| Lagerheimia genevensis (Chodat) Chodat, 1895 | ''Lagerheimia quadriseta''; | |
| Lagerheimia longiseta (Lemmermann) Printz, 1914 | | |
| Lagerheimia marssonii Lemmermann | | |
| Lagerheimia subsalsa Lemmermann, 1898 | | |
| Leptocylindrus danicus P.T. Cleve, 1889 | | |
| Leptocylindrus minimus Gran, 1915 | | |
| Licmophora dalmatica (Kütz.) Grun. 1867 | | |
| Licmophora ehrenbergii (Kützing) Grunow, 1867 | | |
| Licmophora gracilis (Ehrenberg) Grunow, 1867 | | |
| Licmophora paradoxa (Lyngbye) C.A. Agardh, 1828 | | |
| Limnococcus limneticus (Lemmermann) Komárková, Jezberová, Komárek & Zapomělová, 2010 | ''Gloeocapsa limnetica''; | |
| Limnothrix planctonica (Woloszynska) Meffert, 1988 | ''Oscillatoria planctonica''; | |
| Lingulodinium polyedrum (Stein, 1883) Dodge, 1989 | | |
| Lohmannosphaera subclausa Gran et Braarud | | |
| Lyngbya confervoides C. Agardh ex Gomont, 1892 | | |
| Lyrella atlantica (Schmidt) D.G.Mann in F.E. Round, R.M. Crawford & D.G. Mann, 1990 | ''Navicula lyra var. atlantica''; | |
| Lyrella lyra (Ehrenb.) Karayeva, 1978 | ''Navicula lyra''; | |
| Mallomonas lilloensis | | |
| Mastogloia erythraea Grunow, 1860 | | |
| Mastogloia pusilla Grun., 1878 | | |
| Melosira lineata (Dillwyn) C.A. Agardh, 1824 | | |
| Melosira moniliformis (O.F. Müller) C. Agardh, 1824 | | |
| Melosira moniliformis var. subglobosa (Grunow) Hustedt | | |
| Melosira nummuloides C.A. Agardh, 1824 emend. Crawford, 1975 | | |
| Melosira varians C.A. Agardh, 1827 | | |
| Meringosphaera mediterranea Lohmann, 1902 | | |
| Meringosphaera merzi Schiller | | |
| Merismopedia elegans A. Braun in Kützing, 1849 | | |
| Merismopedia glauca (Ehrenberg) Kützing, 1845 | | |
| Merismopedia glauca f. mediterranea (Nägeli) Collinsin Collins, Holden, & Setchell, 1910 [1895-1919] | | |
| Merismopedia minima Beck, 1897 | | |
| Merismopedia punctata Meyen, 1939 | | |
| Merismopedia tenuissima Lemmermann, 1898 | | |
| Mesoporos perforatus (Gran) Lillick 1937 | | |
| Micracanthodinium setiferum (Lohmann 1902) Deflandre, 1937 | ''Cladopyxis setifera''; | |
| 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. | | |
| Microcystis pulverea f. holsatica (Lemmermann) Elenkin | | |
| Monoraphidium arcuatum (Korshikov) Hindák, 1970 | | |
| Monoraphidium contortum (Thuret) Komàrková-Legnerová, 1969 | | |
| Monoraphidium irregulare (G.M.Smith) Komárková-Legnerová | | |
| Monoraphidium komarkovae Nygaard, 1979 | | |
| Monoraphidium minutum (Nägeli) Komárková-legnerová 1969 | | |
| Monoraphidium obtusum Korshikov | | |
| Navicula cancellata Donkin, 1872 | | |
| Navicula directa (W. Smith) Ralfs in Pritchard, 1861 | | |
| Navicula gregaria Donkin, 1861 | ''Navicula cryptocephala''; | |
| Navicula grevillei (Agardh) Heiberg, 1863 | | |
| Navicula grevillei var. remotiva Proshkina-Lavrenko | | |
| Navicula halophila var. convergens Proshkina-Lavrenko | | |
| Navicula menisculus Schumann, 1867 | | |
| Navicula palpebralis de Brébisson, 1853 | | |
| Navicula pennata var. pontica Mer. | | |
| Navicula ramosissima | | |
| Navicula septata Proshkina-Lavrenko | | |
| Neoceratium dens (Ostenfeld & Schmidt) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium dens''; | |
| Neoceratium extensum (Gourret) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium strictum''; | |
| Neoceratium furca (Ehrenberg) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium furca''; | |
| Neoceratium furca var. berghii (Jørg.) Krachmalny, 2011 | ''Ceratium furca var. berghii''; | |
| Neoceratium furca var. eugrammum (Ehrenb.) Krachmalny, 2011 | ''Ceratium furca var. eugrammum''; | |
| Neoceratium fusus (Ehrenberg) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium fusus''; | |
| Neoceratium longirostrum (Gourret) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium longirostrum''; | |
| Neoceratium pulchellum (Schröder) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium pulchellum''; | |
| Neoceratium tripos (O.F.Müller) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium tripos'' and ''Ceratium tripos var. tripos''; | |
| Neoceratium tripos var. ponticum (Jørg.) Krachmalny, 2011 | ''Ceratium tripos var. ponticum''; | |
| Neocystis ovalis (Korshikov) Hindák 1988 | ''Coenochloris ovalis''; | |
| Nitzschia acicularis (Kützing) W. Smith, 1853 | | |
| Nitzschia closterium (Ehrenberg) W. Smith, 1853 | | |
| Nitzschia fruticosa Hustedt | | |
| Nitzschia gracilis Hantzsch, 1860 | | |
| Nitzschia hybrida Grunow in Cleve & Grunow, 1880 | | |
| Nitzschia hybrida var. hyalina Prosckina-Lavrenko | | |
| Nitzschia incerta (Grunow) M.Peragallo 1903 | ''Nitzschia reversa''; | |
| Nitzschia intermedia Hantzsch ex P.T. Cleve & Grunow, 1880 | | |
| Nitzschia linearis (C.A. Agardh) W. Smith, 1853 | | |
| Nitzschia linearis var. tenuis (W.Smith) Grunow in Cleve & Grunow 1880 | | |
| Nitzschia palea (Kützing) W. Smith, 1856 | | |
| Nitzschia paleacea (Grunow) Grunow in Van Heurck, 1881 | | |
| Nitzschia pungens var. atlantica Cleve | | |
| Nitzschia sigma (Kützing) W. Smith, 1853 | | |
| Nitzschia sigmoidea (Ehrenberg) W. Smith | | |
| Nitzschia tenuirostris Mer. | | |
| Nitzschia vermicularis (Kützing) Hantzsch in Rabenhorst, 1860 (1859) | | |
| Noctiluca scintillans (Macartney, 1810) Kofoid, 1920 | | |
| Nodularia spumigena Mertens in Jürgens, 1822 | | |
| Oblea rotunda (Lebour, 1922) Balech, 1964 ex Sournia, 1973 | | |
| Ochromonas oblonga N.Carter, 1937 | | |
| Odontella mobiliensis (J.W. Bailey) Grunow, 1884 | ''Biddulphia mobiliensis''; | |
| Oocystis borgei J. Snow, 1903 | | |
| Oocystis elliptica West, 1892 | | |
| Oocystis lacustris Chodat, 1897 | | |
| Oocystis marssonii Lemmermann, 1898 | | |
| Oocystis novae-semliae Wille | | |
| Oocystis parva W. West & G.S. West, 1898 | | |
| Oocystis socialis Ostenfeldt | | |
| Oocystis solitaria Wittrock in Wittrock & Nordstedt, 1879 | | |
| Oocystis submarina Lagerheim | | |
| Oolithotus fragilis (Lohmann) Martini & C.Müller, 1972 | | |
| Opisthoaulax vorticella (F. Stein) Calado, 2011 | ''Katodinium vorticellum'' and ''Massartia vorticella''; | |
| Oscillatoria kisselevii Anissimova 1949 | | |
| Oxyrrhis marina Dujardin, 1841 | | |
| Oxytoxum turbo Kofoid, 1907 | | |
| Oxytoxum variabile Schiller, 1937 | | |
| Palusphaera vandeli Lecal, 1967 | ''Rhabdosphaera longistylis''; | |
| Pandorina mora (O.F. Müller) Bory de Saint-Vincent, 1824 | ''Pandorina morum''; | |
| Paradoxia multiseta Svirenko 1927 | | |
| Paralia sulcata (Ehrenberg) P.T. Cleve, 1873 | | |
| Paulsenella chaetoceratis (Paulsen) Chatton | | |
| Pediastrum boryanum (Turpin) Meneghini, 1840 | | |
| Pediastrum boryanum var. longicorne Reinsch 1867 | | |
| Pediastrum duplex Meyen, 1829 | | |
| Pentapharsodinium dalei Indelicato & Loblich, 1986 | | |
| Pentapharsodinium tyrrhenicum (Balech, 1990) Montresor, Zingone & Marino, 1993 | | |
| Peridiniella danica (Paulsen, 1907) Okolodkov et Dogde, 1995 | ''Glenodinium danicum''; | |
| Peridiniopsis oculatum (F.Stein) Bourrelly, 1968 | | |
| Peridiniopsis pernardii (Lemmermann) Lebour | | |
| Peridinium aciculiferum Lemmermann, 1900 | | |
| Peridinium cinctum (O.F.Müller) Ehrenberg | | |
| Peridinium knipowitzschii Ussatschew | | |
| Peridinium umbonatum F. Stein, 1883 | ''Peridinium inconspicuum'' and ''Peridinium pusillum''; | |
| Petrodictyon gemma (Ehrenberg) D.G. Mann in Round et al., 1990 | | |
| Phacus pyrum (Ehrenberg) F. Stein, 1878 | ''Phacys pyrum'' (Ehr.) Stein, 1831; | |
| Phaeocystis globosa Scherffel, 1899 | | |
| Phalacroma rotundata (Claparéde & Lachmann) Kofoid & Michener, 1911 | ''Dinophysis rotundata''; | |
| Phormidium chalybeum (Mertens ex Gomont) Anagnostidis & Komárek, 1988 | ''Oscillatoria chalybea''; | |
| Phormidium limosum (Dillwyn) P.C. Silva, 1996 | ''Oscillatoria tenuis''; | |
| Phormidium nigroviride (Thwaites ex Gomont) Anagnostidis & Komárek, 1988 | ''Oscillatoria nigroviridis''; | |
| Pinnularia abaujensis var. linearis (Hustedt) R.M.Patrick | | |
| Plagioselmis nannoplanctica (H. Skuja) G. Novarino, I.A.N. Lucas & S. Morrall, 1994 | ''Rhodomonas minuta''; | |
| Planktolyngbya limnetica (Lemmermann) J.Komárková-Legnerová & G.Cronberg | ''Lyngbya limnetica''; | |
| Planothidium delicatulum (Kützing) Round & Bukhtiyarova, 1996 | ''Achnanthes delicatula''; | |
| Pleurosigma angulatum (Quekett, 1848) Wm. Smith, 1853 | | |
| Pleurosigma elongatum W. Smith, 1852 | | |
| Pleurosigma formosum Wm. Smith | | |
| Pleurosigma rigidum Smith, 1853 | | |
| Podosira hormoides (Montagne) Kützing | | |
| Polykrikos kofoidii Chatton, 1914 | | |
| Polykrikos schwartzii Bütschli 1873 | | |
| Pontosphaera haeckelii Lohmann | | |
| Pontosphaera nigra Schiller | | |
| Poropila dubia Schiller, 1925 | | |
| Preperidinium meunierii (Pavillard, 1907) Elbrächter, 1993 | ''Diplopeltopsis minor''; | |
| Proboscia alata (Brightwell) Sundström, 1986 | | |
| Pronoctiluca acuta (Lohmann, 1912) Schiller, 1933 | | |
| Pronoctiluca pelagica Fabre-Domerque, 188 | | |
| Prorocentrum balticum (Lohmann, 1908) Loeblich, 1970 | | |
| Prorocentrum caspica (Kiselev) Krachmalny 1993 | | |
| Prorocentrum compressum (Bailey, 1850) Abé ex Dodge, 1975 | | |
| Prorocentrum cordatum (Ostenfeld, 1901) Dodge, 1975 | | |
| Prorocentrum maximum (Gourret, 1883) Schiller, 1937 | | |
| Prorocentrum micans Ehrenberg, 1834 | | |
| Prorocentrum oblongum (Schiller) Abé | | Doubtful |
| Prorocentrum perforatum Gran, 1915 | | |
| Prorocentrum ponticus Krachmalny et Terenko, 2002 | | |
| Prorocentrum scutellum Schröder, 1900 | also ''Prorocentrum sphaeroideum''; | |
| Prorocentrum vaginula (Stein, 1883) Dodge 1975 | | |
| Prosoaulax lacustris (F.Stein) Calado & Moestrup, 2005 | ''Amphidinium larvale'' and ''Amphidinium turicense'' and ''Amphidinium lacustre''; | |
| Protoceratium areolatum Kofoid, 1907 | | |
| Protoceratium reticulatum (Claparède et Lachmann, 1859) Bütschli, 1885 | | |
| Protoperidinium achromaticum (Levander, 1902) Balech, 1974 | | |
| Protoperidinium bipes (Paulsen, 1904) Balech, 1974 | | |
| Protoperidinium breve Paulsen, 1907 | | |
| Protoperidinium brevipes (Paulsen, 1908) Balech, 1974 | | |
| Protoperidinium claudicans (Paulsen, 1907) Balech, 1974 | | |
| Protoperidinium conicoides (Paulsen, 1905) Balech, 1973 | | |
| Protoperidinium conicum (Gran, 1900) Balech, 1974 | | |
| Protoperidinium crassipes (Kofoid, 1907) Balech, 1974 | | |
| Protoperidinium depressum (Bailey, 1850) Balech, 1974 | | |
| Protoperidinium diabolum (Cleve) Balech, 1974 | ''Protoperidinium diabolus''; | |
| Protoperidinium divergens (Ehrenberg, 1841) Balech, 1974 | | |
| Protoperidinium excentricum (Paulsen, 1907) Balech, 1974 | | |
| Protoperidinium globulus (Stein, 1883) Balech, 1974 | | |
| Protoperidinium granii (Ostenfield, 1906) Balech, 1974 | | |
| Protoperidinium grenlandicum (Woloszynbska, 1916) Balech, 1974 | | Doubtful |
| Protoperidinium leonis (Pavillard, 1916) Balech, 1974 | | |
| Protoperidinium leonis var. concavilaterale (Kiselev) Krachmalny, 1993 | | |
| Protoperidinium longipes Balech, 1974 | | |
| Protoperidinium longispinum (Kofoid, 1907) Balech, 1974 | | |
| Protoperidinium nudum (Meunier, 1910) Balech, 1974 | | Doubtful |
| Protoperidinium oceanicum (VanHöffen, 1897) Balech, 1974 | | |
| Protoperidinium ovatum Pouchet, 1883 | ''Protoperidinium globulus var. ovatum''; | |
| Protoperidinium pallidum (Ostenfeld, 1899) Balech, 1973 | | |
| Protoperidinium pedunculatum (Schütt) Balech, 1895 | | |
| Protoperidinium pellucidum Bergh, 1882 | | |
| Protoperidinium pentagonum (Gran, 1902) Balech, 1974 | | |
| Protoperidinium pyriforme (Paulsen, 1907) Balech, 1974 | | |
| Protoperidinium quarnerense (Schröder, 1900) Balech, 1974 | ''Protoperidinium globulus var. quarnerense''; | |
| Protoperidinium solidicorne (Mangin, 1922) Balech, 1974 | | |
| Protoperidinium spiniferum (Schiller) 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 | | |
| Pseudoschroederia robusta (O.Korshikov) E.Hegewald & E.Schnepf | ''Schroederia robusta''; | |
| Pseudosolenia calcar-avis (Schultze) Sundström, 1986 | | |
| Pteromonas torta O.A. Korshikov 1938 | | |
| Pterosperma cristatum Schiller, 1925 | | |
| Pterosperma jorgensii Shiller | | |
| Pyramimonas longicauda Van Meel | | |
| Pyrophacus horologicum Stein, 1883 | | |
| Raphidocelis contorta (Schmidle) Marvan et al., 1984 | | |
| Rhabdonema adriaticum Kützing, 1844 | | |
| Rhabdosphaera claviger Murray & Blackman, 1898 | ''Rhabdosphaera stylifer''; | |
| Rhabdosphaera hispida Lohmann | | |
| Rhabdosphaera tubulosa Schiller | | |
| Rhizosolenia acuminata (Peragallo 1892) Gran, 1905 | | |
| Rhodomonas marina (Dangeard) Lemmermann, 1899 | ''Chroomonas marina''; | |
| Rhoicosphenia abbreviata (C.A. Agardh) Lange-Bertalot, 1980 | | |
| Scenedesmus abundans (O. Kirchner) Chodat, 1913 | ''Scenedesmus quadricauda var. abundans'' and ''Scenedesmus sempervirens''; | |
| Scenedesmus acuminatus (Lagerheim) Chodat, 1902 | also ''Scenedesmus falcatus''; | |
| Scenedesmus acuminatus var. biseriatus | | |
| Scenedesmus arcuatus Lemmermann, 1899 | | |
| Scenedesmus armatus (R. Chodat) R. Chodat, 1913 | also ''Scenedesmus columnatus'' and ''Scenedesmus helveticus''; | |
| Scenedesmus bicaudatus Dedusenko | | |
| Scenedesmus bijugatus var. alternans (Reinsch) Hansgirg | | |
| Scenedesmus caudato-aculeolatus Chodat 1926 | | |
| Scenedesmus intermedius Chodat, 1926 | | |
| Scenedesmus lefevrei Deflandre | | |
| Scenedesmus magnus Meyen, 1829 | ''Scenedesmus quadricauda var. setosus''; | |
| Scenedesmus obliquus (Turpin) Kützing, 1833 | also ''Scenedesmus bijugatus''; ''Scenedesmus acutus''; | |
| Scenedesmus obliquus var. alterans | | |
| Scenedesmus obtusus Meyen 1829 | | |
| Scenedesmus opoliensis P.G.Richter 1897 | | |
| Scenedesmus opoliensis var. alatus N.Dedusenko-Shchegoleva | | |
| Scenedesmus opoliensis var. carinatus Lemmermann, 1899 | | |
| Scenedesmus quadricauda (Turpin) Brébisson in Brébisson & Godey, 1835 | | |
| Scenedesmus quadricauda var. armatus (Chodat) Deduss | | |
| Scenedesmus quadricauda var. eualternans | | |
| Scenedesmus spinosus Chodat | | |
| Scenedesmus tetradesmiformis (Wolosz.) Chodat | | |
| Schroederia setigera (Schröder) Lemmermann, 1898 | | |
| Scrippsiella trochoidea (Stein, 1883) Balech ex Loeblich III, 1965 | | |
| Selenastrum bibraianum Reinsch 1867 | ''Selenastrum bibraianus''; | |
| Siderocelis ornata (Fott) Fott 1934 | | |
| Skeletonema costatum (Greville) P.T. Cleve, 1878 | | |
| Skeletonema potamos (Weber) Hasle in Hasle & Evensen, 1976 | | |
| Skeletonema subsalsum (A.Cleve) Bethge, 1928 | | |
| Snowella lacustris (Chodat) Komárek & Hindák, 1988 | ''Gomphosphaeria lacustris''; | |
| Spatulodinium pseudonoctiluca (Pouchet, 1885) J. Cachon & Cachon ex Loeblich & Loeblich III, 1969 | | |
| Sphaerocystis schroeteri Chodat, 1897 | ''Gloeococcus schroeteri''; | |
| Spirulina laxissima G.S. West, 1907 | | |
| Spirulina meneghiniana Zanardini ex Gomont, 1892 | | |
| Spirulina tenuissima Kutzing | | |
| Stauridium tetras (Ehrenberg) E. Hegewald | ''Pediastrum tetras''; | |
| Staurosira construens Ehrenberg, 1843 | | |
| Staurosira construens var. construens | | |
| Stephanodiscus astraea | | |
| Stephanodiscus hantzschii Grunow in P.T. Cleve & Grunow, 1880 | | |
| Stephanodiscus minutulus (Kützing) P.T. Cleve & Möller 1978 | ''Stephanodiscus astraea var. minutula''; | |
| Stephanodiscus socialis I.V.Makarova & A.I.Proshkina-Lavrenko | | |
| Striatella delicatula (Kützing) Grunow ex Van Heurck, 1881 | | |
| Striatella unipunctata (Lyngb.) Ag. | | |
| Strombomonas fluviatilis (Lemmermann) Deflandre 1930 | ''Trachelomonas fluviatilis''; | |
| Strombomonas longa (Swirenko) Popowa 1955 | | |
| Surirella brebisonii var. brebisonii Krammer & Lange-Bertalot 1987 | | |
| Surirella brebissonii Krammer & Lange-Bertalot, 1987 | | |
| Surirella minuta Brébisson in Kützing, 1849 | ''Surirella ovata'' and ''Surirella ovata var. salina''; | |
| Surirella ovalis Brébisson, 1838 | | |
| Synechococcus elongatus (Nägeli) Nägeli 1849 | | |
| Synechocystis salina Wislouch 1924 | | |
| Synedra baculus Gregory 1857 | | |
| Synedra biceps Kützing, 1844 | ''Synedra ulna var. biceps''; | |
| Synedra curvata Pr. Lavrenko | | |
| Synedra ulna var. aequalis (Kützing) Hustedt | | |
| Synedra ulna var. danica (Kützing) Van Heurck, 1885 | | |
| Syracosphaera dentata Lohmann | | |
| Syracosphaera pulchra Lohmann | | |
| Tabularia parva (Kützing) D.Williams & Round | | |
| Teleaulax acuta (Butcher) Hill | | |
| Tetradesmus lunatus | | |
| Tetradesmus wisconsinensis G.M.Smith | | |
| Tetraedron caudatum (Corda) Hansgirg 1888 | | |
| Tetraedron minimum (A.Braun) Hansgirg 1888 | | |
| Tetraedron triangulare Korshikov | | |
| Tetraselmis inconspicua Butcher | | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | | |
| Thalassiosira aculeata Pr.-Lavr. 1956 | | |
| Thalassiosira aestivalis Gran & Angst, 1931 | | |
| Thalassiosira angulata (Gregory) Hasle, 1978 | ''Thalassiosira decipiens''; | |
| Thalassiosira anguste-lineata (A. Schmidt) Fryxell et Hasle, 1977 | ''Coscinosira polychorda''; | |
| Thalassiosira baltica (Grunow in P.T. Cleve & Grunow) Ostenfeld, 1901 | | |
| Thalassiosira coronifera Pr. Lavrenko | | |
| Thalassiosira eccentrica (Ehrenberg) P.T. Cleve, 1903-1904 | | |
| Thalassiosira excentrica var. fasciculata Hustedt | | |
| Thalassiosira leptopus (Grunow In Van Heurck) Fryxell et Hasle, 1977 | ''Coscinodiscus lineatus''; | |
| Thalassiosira nordenskioeldii P.T. Cleve, 1873 | | |
| Thalassiosira ornata Proshkina-Lavrenko 1959 | | |
| Thalassiosira parva Proshk.-Lavr., 1955 | | |
| Thalassiothrix mediterranea Pavillard | | |
| Toxarium undulatum J.W. Bailey, 1854 | ''Synedra undulata''; | |
| Treubaria crassispina G.M.Smith 1926 | | |
| Treubaria schmidlei (Schröder) Fott & Kovácik | | |
| Trochiscia aciculifera (Lagerheim) Hansgirg 1888 | | |
| Tryblionella angustata W. Smith, 1853 | | |
| Tryblionella apiculata Gregory, 1857 | | |
| Tryblionella compressa (J.W. Bailey) M. Poulin in Poulin et al., 1990 | ''Tryblionella punctata''; | |
| Tryblionella gracilis W. Smith, 1853 | | |
| Tryblionella hungarica (Grunow) Frenguelli, 1942 | | |
| Tryblionella levidensis W. Smith, 1856 | | |
| Ulnaria acus (Kütz.) Aboal, 2003 | ''Synedra acus''; | |
| Ulnaria ulna (Nitzsch) P. Compère in Jahn et al., 2001 | ''Synedra ulna''; | |
| Warnowia maculata (Kofoid et Swezy, 1921) Lindemann, 1928 | | |
| Warnowia schuettii (Kofoid et Swezy, 1921) Schiller, 1933 | | |
| Westella botryoides (W.West) De Wildeman 1897 | | |
| Woloszynskia pascheri (Suchlandt) Stosch | also ''Gymnodinium inversum''; | Doubtful |
| Woronichinia compacta (Lemmermann) Komárek & Hindák, 1988 | ''Gomphosphaeria lacustris f. compacta''; | |