| Species | as Species | Doubtful |
|---|
Connected successfully| Achnanthes brevipes C.A. Agardh, 1824 | | |
| Achnanthes brevipes var. intermedia (Kützing) P.T. Cleve, 1895 | | |
| Achnanthes parvula Kützing, 1844 | ''Achnanthes brevipes var. parvula''; | |
| Actinocyclus octonarius var. tenellus (Brébisson) Hendey, 1954 | ''Actinocyclus ehrenbergii var. tenellus''; | |
| Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 | ''Actinoptychus undulatus''; | |
| Asteromphalus robustus Castracane, 1875 | | |
| Campylodiscus fastuosus Ehrenberg, 1845 | ''Campylodiscus thuretii''; | |
| Campylodiscus thuretii var. lineolatum Pr.-Lavr., 1955 | | |
| Chaetoceros affinis Lauder, 1864 | | |
| Chaetoceros wighamii Brightwell, 1856 | | |
| Cocconeis scutellum (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Cocconeis scutellum var. minutissima Grunow in Van Heurck, 1880 | | |
| Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg, 1854 | | |
| Coscinodiscus perforatus var. cellulosus Grun., 1844 | | |
| Coscinodiscus radiatus Ehrenberg, 1841 | | |
| Diatoma tenue C.A. Agardh, 1812 | ''Diatoma elongatum''; | |
| Endictya oceanica Ehrenberg, 1845 | | |
| Grammatophora marina (Lyngbye) Kützing, 1844 | | |
| Pseudosolenia calcar-avis (Schultze) Sundström, 1986 | ''Rhizosolenia calcar-avis''; | |
| Surirella fastuosa (Ehrenberg) Kützing, 1844 | | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | | |
| Thalassiosira antiqua (Grunow) Cleve '''†''' | | |
| Thalassiosira baltica (Grunow in P.T. Cleve & Grunow) Ostenfeld, 1901 | ''Thalassiosira subsalina'' Pr.-Lavr. sp. nova; | |
| Thalassiosira coronata Pr.-Lavr., 1955 | | |
| Thalassiosira eccentrica (Ehrenberg) P.T. Cleve, 1903-1904 | ''Coscinodiscus excentricus''; | |
| Thalassiosira parva Proshk.-Lavr., 1955 | | |