| Species | as Species | Doubtful |
|---|
Connected successfully| Achnanthes brevipes var. intermedia (Kützing) P.T. Cleve, 1895 | ''Achnanthes subsessilis''; | |
| Achnanthes longipes Agardh, 1824 | | |
| Actinocyclus octonarius Ehrenberg, 1838 | ''Actinocyclus ehrenbergii''; | |
| Amphora ostrearia Brébisson, 1849 | | |
| Ardissonea crystallina (C.A. Agardh) Grunow in Cleve & Grunow, 1880 | ''Synedra crystallina''; | |
| Ardissonea fulgens (Greville) Grunow in Cleve & Grunow, 1880 | ''Synedra fulgens''; | |
| Asteromphalus flabellatus (Brébisson) Greville, 1859 | | |
| Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 | ''Bacillaria paradoxa''; | |
| Campylodiscus fastuosus Ehrenberg, 1845 | ''Campylodiscus parvulus''; | |
| Cerataulina velifera Mereschkowsky | | |
| Chaetoceros compressus Lauder, 1864 | ''Chaetoceros contortus''; | |
| Chaetoceros curvisetus P.T. Cleve, 1889 | | |
| Chaetoceros danicus P.T.Cleve, 1889 | | |
| Chaetoceros densus P.T. Cleve, 1901 | | |
| Chaetoceros lauderi Ralfs in Lauder, 1864 | ''Chaetoceros weissflogii''; | |
| Chaetoceros peruvianus Brightw. | | |
| Cocconeis scutellum (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Coscinodiscus biconicus Van Breemen | | |
| Coscinodiscus centralis Ehrenberg, 1844 | | |
| Coscinodiscus concinnus W. Smith, 1856 | | |
| Coscinodiscus gigas Ehrenb. 1841 | | |
| Coscinodiscus granii Gough, 1905 | | |
| Coscinodiscus radiatus Ehrenberg, 1841 | | |
| Coscinodiscus subbulliens E. Jørgensen, 1905 | | |
| Dactyliosolen fragilissimus (Bergon) G. R. Hasle, 1991 | ''Rhizosolenia fragillissima''; | |
| Dinophysis caudata Saville-Kent, 1881 | ''Dinophysis homunculus''; | |
| Dinophysis sacculus Stein, 1883 | | |
| Diplopsalis lenticula Bergh, 1881 | | |
| Distephanus speculum (Ehrenberg) Haeckel, 1887 | | |
| Ditylum brightwellii (T. West) Grunow in Van Heurck, 1883 | | |
| Ebria tripartita (Shumann) Lemmermann, 1899 | | |
| Goniodoma acuminatum (Ehrenberg, 1838) Stein, 1883 | | |
| Grammatophora marina (Lyngbye) Kützing, 1844 | | |
| Gyrosigma balticum (Ehrenberg) Rabenhorst | ''Pleurosigma balticum''; | |
| Gyrosigma spectabile (Grunow) Cleve | ''Nitzschia spectabilis''; | |
| Gyrosigma tenuissimum (W. Smith) Griffith & Henfrey, 1856 | ''Pleurosigma tenuissimum''; | |
| Hemiaulus hauckii Grunow in Van Heurck, 1882 | | |
| Hermesinum adriaticum O.Zacharias, 1906 | | |
| Hyalodiscus scoticus (Kützing) Grunow, 1879 | | |
| Leptocylindrus danicus P.T. Cleve, 1889 | | |
| Licmophora flabellata C. Agardh, 1830 | | |
| Melosira borreri Greville, 1833 | | |
| Melosira lineata (Dillwyn) C.A. Agardh, 1824 | ''Melosira juergensi''; | |
| Melosira nummuloides C.A. Agardh, 1824 emend. Crawford, 1975 | | |
| 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 insignis | | |
| Nitzschia longissima (Brébisson in Kützing) Ralfs in Pritchard, 1861 | | |
| Nitzschia lorenziana Grunow in Cleve & Grunow, 1880 | | |
| Noctiluca scintillans (Macartney, 1810) Kofoid, 1920 | ''Noctiluca miliaris''; | |
| Odontella mobiliensis (J.W. Bailey) Grunow, 1884 | ''Biddulphia mobiliensis''; | |
| Paralia sulcata (Ehrenberg) P.T. Cleve, 1873 | | |
| Petrodictyon gemma (Ehrenberg) D.G. Mann in Round et al., 1990 | ''Surirella gemma''; | |
| Phalacroma rotundata (Claparéde & Lachmann) Kofoid & Michener, 1911 | ''Dinophysis rotundata''; | |
| Pleurosigma elongatum W. Smith, 1852 | | |
| Pleurosira laevis (Ehrenberg) Compère, 1982 | ''Biddulphia laevis''; | |
| Proboscia alata (Brightwell) Sundström, 1986 | ''Rhizosolenia alata''; | |
| Prorocentrum compressum (Bailey, 1850) Abé ex Dodge, 1975 | ''Exuviaella compressa''; | |
| Prorocentrum micans Ehrenberg, 1834 | | |
| Protoperidinium divergens (Ehrenberg, 1841) Balech, 1974 | ''Peridinium divergens''; | |
| Protoperidinium steinii (Jörgensen, 1899) Balech, 1974 | ''Peridinium steinii'' and ''Peridinium michaelis''; | |
| Rhabdonema adriaticum Kützing, 1844 | | |
| Richelia intracellularis J. Schmidt, 1901 | | |
| Skeletonema costatum (Greville) P.T. Cleve, 1878 | | |
| Striatella unipunctata (Lyngb.) Ag. | | |
| Surirella fastuosa (Ehrenberg) Kützing, 1844 | | |
| Thalassionema frauenfeldii (Grunow) Hallegraeff, 1986 | ''Thalassiothrix frauenfeldii''; | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | ''Thalassiothrix nitzschioides''; | |
| Thalassiosira angulata (Gregory) Hasle, 1978 | ''Thalassiosira decipiens''; | |
| Thalassiosira eccentrica (Ehrenberg) P.T. Cleve, 1903-1904 | ''Coscinodiscus excentricus''; | |
| Toxarium undulatum J.W. Bailey, 1854 | ''Synedra undulata''; | |
| Trachyneis aspera (Ehrenberg) Cleve | | |
| Trochiscia brachiolata (Möbius) Lemmermann | | |