| Species | as Species | Doubtful |
|---|
Connected successfully| Acanthoica quattrospina Lohman, 1903 | | |
| Achnanthes brevipes C.A. Agardh, 1824 | | |
| Achnanthes longipes Agardh, 1824 | | |
| Achnanthes parvula Kützing, 1844 | ''Achnanthes brevipes var. parvula''; | |
| Biddulphia alternans (J.W.Bailey) Van Heurck, 1885 | | |
| Cerataulina pelagica (Cleve) Hendey, 1937 | ''Cerataulina bergonii''; | |
| Chaetoceros curvisetus P.T. Cleve, 1889 | | |
| Chaetoceros danicus P.T.Cleve, 1889 | | |
| Chaetoceros densus P.T. Cleve, 1901 | | |
| Chaetoceros simplex Ostenfeld, 1901 | | |
| Cocconeis scutellum (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Coscinodiscus janischii Schmidt, 1878 | | |
| Cyclotella caspia Grunow, 1878 | | |
| Dactyliosolen fragilissimus (Bergon) G. R. Hasle, 1991 | ''Rhizosolenia fragillissima''; | |
| Diatoma tenue C.A. Agardh, 1812 | ''Diatoma elongatum''; | |
| Dinophysis caudata Saville-Kent, 1881 | | |
| Dinophysis ovum Schütt, 1895 | | |
| Dinophysis sacculus Stein, 1883 | | |
| Diplopsalis lenticula Bergh, 1881 | ''Glenodinium lenticula''; | |
| Distephanus speculum (Ehrenberg) Haeckel, 1887 | | |
| Ditylum brightwellii (T. West) Grunow in Van Heurck, 1883 | | |
| Ebria tripartita (Shumann) Lemmermann, 1899 | | |
| Emiliania huxleyi (Lohmann) Hay & Mohler, 1967 | ''Pontosphaera huxleyi''; | |
| Encyonema minutum (Hilse in Rabenhorst) D.G. Mann in Round et al., 1990 | ''Cymbella ventricosa''; | |
| Glenodinium paululum Lindemann | | |
| Gonyaulax spinifera (Claparède & Lachmann, 1859) Diesing, 1866 | | |
| Grammatophora marina (Lyngbye) Kützing, 1844 | | |
| Gymnodinium wulffii Schiller, 1933 | | |
| Gyrodinium fusiforme Koifoid & Swezy, 1921 | | |
| Gyrodinium pingue (Schütt, 1895) Kofoid et Swezy, 1921 | | |
| Helladosphaera cornifera (Schiller, 1913) Kamptner, 1937 | ''Syracosphaera cornifera''; | |
| Licmophora flabellata C. Agardh, 1830 | | |
| Melosira moniliformis (O.F. Müller) C. Agardh, 1824 | | |
| Navicula cancellata Donkin, 1872 | | |
| Neoceratium furca (Ehrenberg) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium furca''; | |
| 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 tripos (O.F.Müller) F.Gomez, D.Moreira & P.Lopez-Garcia, 2009 | ''Ceratium tripos''; | |
| Nitzschia closterium (Ehrenberg) W. Smith, 1853 | | |
| Nitzschia tenuirostris Mer. | | |
| Oxytoxum parvum Schiller, 1937 | | |
| Peridinium cinctum (O.F.Müller) Ehrenberg | | |
| Phalacroma rotundata (Claparéde & Lachmann) Kofoid & Michener, 1911 | | |
| Pontosphaera nigra Schiller | | |
| 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 lima (Ehrenberg, 1860) Stein, 1975 | ''Exuviaella marina''; | |
| Prorocentrum micans Ehrenberg, 1834 | | |
| Protoceratium reticulatum (Claparède et Lachmann, 1859) Bütschli, 1885 | | |
| Protoperidinium bipes (Paulsen, 1904) Balech, 1974 | ''Peridinium minusculum''; | |
| Protoperidinium brevipes (Paulsen, 1908) Balech, 1974 | ''Peridinium brevipes''; | |
| Protoperidinium depressum (Bailey, 1850) Balech, 1974 | ''Peridinium depressum''; | |
| Protoperidinium divergens (Ehrenberg, 1841) Balech, 1974 | ''Peridinium divergens''; | |
| Protoperidinium pentagonum (Gran, 1902) Balech, 1974 | ''Peridinium pentagonum''; | |
| Protoperidinium steinii (Jörgensen, 1899) Balech, 1974 | ''Peridinium steinii''; | |
| Pseudo-nitzschia seriata (P.T. Cleve, 1883) H. & M. Peragallo, 1900 | ''Nitzschia seriata''; | |
| Pseudosolenia calcar-avis (Schultze) Sundström, 1986 | ''Rhizosolenia calcar-avis''; | |
| Pyrocystis lunula (Schütt) Schütt, 1896 | | |
| Rhabdosphaera hispida Lohmann | | |
| Scrippsiella trochoidea (Stein, 1883) Balech ex Loeblich III, 1965 | ''Peridinium trochoideum''; | |
| Skeletonema costatum (Greville) P.T. Cleve, 1878 | | |
| Thalassionema frauenfeldii (Grunow) Hallegraeff, 1986 | ''Thalassiothrix frauenfeldii''; | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | | |
| Thalassiosira eccentrica (Ehrenberg) P.T. Cleve, 1903-1904 | | |
| Thalassiosira parva Proshk.-Lavr., 1955 | | |