| Species | as Species | Doubtful |
|---|
Connected successfully| Achnanthes brevipes C.A. Agardh, 1824 | | |
| Achnanthes longipes Agardh, 1824 | | |
| Amphidinium acutissimum Schiller, 1933 | | |
| Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 | ''Bacillaria paradoxa''; | |
| Cerataulina pelagica (Cleve) Hendey, 1937 | | |
| Chaetoceros abnormis Proschkina-Lavrenko, 1953 | | |
| Chaetoceros affinis Lauder, 1864 | | |
| Chaetoceros borgei Lemmermann, 1904 | | |
| Chaetoceros compressus Lauder, 1864 | | |
| Chaetoceros convolutus Castracane, 1886 | | |
| Chaetoceros curvisetus P.T. Cleve, 1889 | | |
| Chaetoceros danicus P.T.Cleve, 1889 | | |
| Chaetoceros densus P.T. Cleve, 1901 | | |
| Chaetoceros dichaeta Ehrenberg, 1844 | | |
| Chaetoceros muelleri Lemmermann, 1898 | | |
| Chaetoceros socialis Lauder, 1864 | | |
| Chaetoceros wighamii Brightwell, 1856 | | |
| Coscinodiscus concinnus W. Smith, 1856 | | |
| Coscinodiscus gigas Ehrenb. 1841 | | |
| Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg, 1854 | | |
| Cyclotella choctawhatcheeana Prasad, 1990 | ''Thalassiosira nana''; | |
| Dactyliosolen fragilissimus (Bergon) G. R. Hasle, 1991 | ''Rhizosolenia fragillissima''; | |
| Dinobryon balticum (Schütt) Lemmermann, 1900 | ''Dinobryon pellucidum''; | |
| Dinophysis acuminata Claparède & Lachmann, 1859 | | |
| Dinophysis acuta Ehrenberg, 1841 | | |
| Dinophysis arctica Mereschkowsky, 1879 | | |
| Dinophysis caudata Saville-Kent, 1881 | | |
| Dinophysis dentata Schiller, 1928 | | |
| Dinophysis fortii Pavillard, 1923 | | |
| Dinophysis hastata Stein, 1883 | | |
| Dinophysis norvegica Claparède & Lachmann, 1859 | | |
| Dinophysis ovum Schütt, 1895 | | |
| Dinophysis sacculus Stein, 1883 | | |
| Distephanus speculum (Ehrenberg) Haeckel, 1887 | | |
| Ebria tripartita (Shumann) Lemmermann, 1899 | | |
| Entomoneis paludosa (W. Smith) Reimer, 1975 | ''Amphiprora paludosa''; | |
| Goniodoma polyedricum (Pouchet, 1883) Jørgensen, 1899 | | |
| Gonyaulax diegensis Kofoid, 1911 | | |
| Gonyaulax digitale (Pouchet, 1883) Kofoid, 1911 | | |
| Gonyaulax minima Matzenauer, 1933 | | |
| Gonyaulax polygramma Stein, 1883 | | |
| Gonyaulax spinifera (Claparède & Lachmann, 1859) Diesing, 1866 | | |
| Guinardia delicatula (Cleve) G.R. Hasle, 1996 | ''Rhizosolenia delicatula''; | |
| Gymnodinium rhomboides Schütt, 1895 | | |
| Hemiaulus hauckii Grunow in Van Heurck, 1882 | | |
| Hemiaulus membranaceus Cleve, 1873 | | |
| Heterocapsa triquetra (Ehrenberg, 1840) Stein, 1883 | ''Peridinium triquetrum''; | |
| Leptocylindrus danicus P.T. Cleve, 1889 | | |
| Leptocylindrus minimus Gran, 1915 | | |
| Licmophora gracilis (Ehrenberg) Grunow, 1867 | | |
| Lingulodinium polyedrum (Stein, 1883) Dodge, 1989 | ''Gonyaulax polyedra''; | |
| Navicula cancellata Donkin, 1872 | | |
| Neoceratium falcatum (Kofoid) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium falcatum''; | |
| 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 pentagonum (Gourret) F.Gomez & P.Lopez-Garcia, 2009 | ''Ceratium pentagonum''; | |
| Neoceratium tripos (O.F.Müller) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium tripos''; | |
| Nitzschia bicapitata Cl. | | |
| Nitzschia closterium (Ehrenberg) W. Smith, 1853 | | |
| Nitzschia longissima (Brébisson in Kützing) Ralfs in Pritchard, 1861 | | |
| Nitzschia tenuirostris Mer. | | |
| Oblea rotunda (Lebour, 1922) Balech, 1964 ex Sournia, 1973 | ''Glenodinium rotundum''; | |
| Oxytoxum laticeps Schiller, 1937 | | |
| Oxytoxum viride Schiller, 1937 | | |
| Peridiniella danica (Paulsen, 1907) Okolodkov et Dogde, 1995 | ''Glenodinium danicum''; | |
| Phalacroma ovatum (Claparède et Lachmann, 1859) Jørgensen, 1923 | | |
| Phalacroma rotundata (Claparéde & Lachmann) Kofoid & Michener, 1911 | | |
| Podosira hormoides (Montagne) Kützing | | |
| Proboscia alata (Brightwell) Sundström, 1986 | ''Rhizosolenia alata''; | |
| Prorocentrum compressum (Bailey, 1850) Abé ex Dodge, 1975 | ''Exuviaella compressa''; | |
| Prorocentrum cordatum (Ostenfeld, 1901) Dodge, 1975 | ''Exuviaella cordata''; | |
| Prorocentrum micans Ehrenberg, 1834 | | |
| Prorocentrum vaginula (Stein, 1883) Dodge 1975 | ''Exuviaella vaginula''; | |
| Protoceratium reticulatum (Claparède et Lachmann, 1859) Bütschli, 1885 | | |
| Protoperidinium achromaticum (Levander, 1902) Balech, 1974 | ''Peridinium achromaticum''; | |
| Protoperidinium bipes (Paulsen, 1904) Balech, 1974 | ''Peridinium minusculum''; | |
| Protoperidinium brochii (Kofoid & Swezy) Balech | ''Peridinium brochii''; | |
| Protoperidinium crassipes (Kofoid, 1907) Balech, 1974 | ''Peridinium crassipes''; | |
| Protoperidinium depressum (Bailey, 1850) Balech, 1974 | ''Peridinium depressum''; | |
| Protoperidinium globulus (Stein, 1883) Balech, 1974 | ''Peridinium globulus''; | |
| Protoperidinium granii (Ostenfield, 1906) Balech, 1974 | ''Peridinium granii''; | |
| Protoperidinium oceanicum (VanHöffen, 1897) Balech, 1974 | ''Peridinium oceanicum''; | |
| Protoperidinium pyriforme (Paulsen, 1907) Balech, 1974 | ''Peridinium pyriforme''; | |
| Protoperidinium steinii (Jörgensen, 1899) Balech, 1974 | ''Peridinium steinii''; | |
| Pseudo-nitzschia delicatissima (P.T. Cleve, 1897) Heiden, 1928 | ''Nitzschia delicatissima''; | |
| Pseudo-nitzschia seriata (P.T. Cleve, 1883) H. & M. Peragallo, 1900 | ''Nitzschia seriata''; | |
| Pseudosolenia calcar-avis (Schultze) Sundström, 1986 | ''Rhizosolenia calcar-avis''; | |
| Pyrophacus horologicum Stein, 1883 | | |
| Rhabdonema adriaticum Kützing, 1844 | | |
| Rhizosolenia bergonii H.Peragallo, 1892 | | |
| Skeletonema costatum (Greville) P.T. Cleve, 1878 | | |
| Tabularia fasciculata (C. Agardh) D.M. Williams & Round, 1986 | ''Synedra tabulata''; | |
| Thalassionema frauenfeldii (Grunow) Hallegraeff, 1986 | ''Thalassiothrix frauenfeldii''; | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | | |
| Thalassiosira antiqua (Grunow) Cleve '''†''' | | |
| Thalassiosira baltica (Grunow in P.T. Cleve & Grunow) Ostenfeld, 1901 | ''Coscinodiscus subtilis''; | |