| Species | as Species | Doubtful |
|---|
Connected successfully| Achnanthes brevipes C.A. Agardh, 1824 | | |
| Achnanthes brevipes var. intermedia (Kützing) P.T. Cleve, 1895 | | |
| Achnanthes longipes Agardh, 1824 | | |
| Achnanthes parvula Kützing, 1844 | ''Achnanthes brevipes var. parvula''; | |
| Actinocyclus octonarius Ehrenberg, 1838 | ''Actinocyclus ehrenbergii''; | |
| Actinocyclus octonarius var. crassus (W. Smith) Hendey, 1954 | ''Actinocyclus ehrenbergii var. crassus''; | |
| Actinocyclus octonarius var. ralfsii (W. Smith) Hendey, 1954 | ''Actinocyclus ehrenbergii var. ralfsii''; | |
| Actinocyclus octonarius var. tenellus (Brébisson) Hendey, 1954 | ''Actinocyclus ehrenbergii var. tenellus''; | |
| Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 | ''Actinoptychus undulatus''; | |
| Amphora hyalina Kützing, 1844 | | |
| Amphora insecta Grunow ex A. Schmidt, 1876 | | |
| Ardissonea crystallina (C.A. Agardh) Grunow in Cleve & Grunow, 1880 | ''Synedra crystallina''; | |
| Asteromphalus flabellatus (Brébisson) Greville, 1859 | | |
| Asteromphalus heptactis (Brébisson) Ralfs, 1861 | | |
| Asteromphalus robustus Castracane, 1875 | | |
| Attheya septentrionalis (Østrup) Crawford in Crawford et al., 1994 | ''Chaetoceros septentrionalis''; | |
| Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 | ''Bacillaria paradoxa''; | |
| Bacteriastrum hyalinum Lauder, 1864 | | |
| Campylodiscus fastuosus Ehrenberg, 1845 | ''Campylodiscus thuretii''; | |
| Campylodiscus thuretii var. lineolatum Pr.-Lavr., 1955 | | |
| Cerataulina pelagica (Cleve) Hendey, 1937 | ''Cerataulina bergonii''; | |
| Chaetoceros abnormis Proschkina-Lavrenko, 1953 | | |
| Chaetoceros affinis Lauder, 1864 | | |
| Chaetoceros affinis f. schutii | | |
| Chaetoceros anastomosans Grunow | | |
| Chaetoceros borealis J.W. Bailey, 1854 | | |
| Chaetoceros borgei Lemmermann, 1904 | | |
| Chaetoceros calcitrans (Paulsen) Takano, 1968 | ''Chaetoceros simplex var. calcitrans''; | |
| Chaetoceros ceratosporus Ostenfeld, 1910 | | |
| Chaetoceros compressus Lauder, 1864 | | |
| Chaetoceros convolutus Castracane, 1886 | | |
| Chaetoceros coronatus Gran, 1897 | | |
| Chaetoceros curvisetus P.T. Cleve, 1889 | | |
| Chaetoceros danicus P.T.Cleve, 1889 | | |
| Chaetoceros debilis P.T. Cleve, 1894 | | |
| Chaetoceros decipiens P.T. Cleve, 1873 | | |
| Chaetoceros densus P.T. Cleve, 1901 | | |
| Chaetoceros diadema (Ehrenberg) Gran, 1897 | ''Chaetoceros subsecundus''; | |
| Chaetoceros diversus Cleve, 1873 | | |
| Chaetoceros dubius Pr.-Lavrenko | | |
| Chaetoceros fallax Prosckina-Lavrenko, 1955 | | |
| Chaetoceros heterovalvatus Prosckina-Lavrenko | | |
| Chaetoceros holsaticus Schütt, 1895 | | |
| Chaetoceros insignis Prosckina-Lavrenko | | |
| 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 mitra (J.W. Bailey) P.T. Cleve, 1896 | | |
| Chaetoceros muelleri Lemmermann, 1898 | | |
| Chaetoceros neogracilis VanLand., 1968 | ''Chaetoceros gracilis''; | |
| Chaetoceros paulsenii Ostenfeld, 1901 | | |
| Chaetoceros peruvianus Brightw. | | |
| Chaetoceros pseudocrinitus Ostenfeld, 1901 | | |
| 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 socialis f. autumnalis A.I. Proshkina-Lavrenko | | |
| Chaetoceros socialis f. vernalis A.I. Proshkina-Lavrenko | | |
| Chaetoceros subtilis (Proschkina-Lavrenko) Proschkina-Lavrenko, 1961 | | |
| Chaetoceros teres P.T. Cleve, 1896 | | |
| Chaetoceros wighamii Brightwell, 1856 | | |
| Chaetoceros willei Grunow, 1897 | ''Chaetoceros affinis var. willei''; | |
| Climaconeis inflexa (Brébisson ex Kützing) E.J.Cox, 1982 | ''Amphora inflexa''; | |
| Cocconeis scutellum (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Cocconeis scutellum var. parva (Grunow in Van Heurck) P.T. Cleve, 1896 | | |
| Coscinodiscus apiculatus Ehrenberg, 1844 | | |
| Coscinodiscus asteromphalus Ehrenberg, 1844 | | |
| Coscinodiscus commutatus Grunow, 1884 | ''Coscinodiscus jonesianus var. commutatus''; | |
| Coscinodiscus concinnus W. Smith, 1856 | | |
| 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 marginatus Ehrenberg, 1841 (1843, 1844) | | |
| Coscinodiscus monodon K.S. Mereschkowsky | | |
| Coscinodiscus nitidus W. Gregory, 1857 | | |
| Coscinodiscus nitidus var. subradiata K.S. Mereschkowsky | | |
| Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg, 1854 | | |
| Coscinodiscus perforatus (Forti) Hust., 1928 | | |
| Coscinodiscus perforatus var. cellulosus Grun., 1844 | | |
| Coscinodiscus perforatus var. pavillardii (Forti) Hust., 1928 | | |
| Coscinodiscus radiatus Ehrenberg, 1841 | | |
| Cyclotella caspia Grunow, 1878 | | |
| Dactyliosolen fragilissimus (Bergon) G. R. Hasle, 1991 | ''Rhizosolenia fragillissima''; | |
| Detonula confervacea (P.T. Cleve) Gran, 1900 | | |
| Diatoma tenue C.A. Agardh, 1812 | ''Diatoma elongatum''; | |
| Ditylum brightwellii (T. West) Grunow in Van Heurck, 1883 | | |
| Endictya oceanica Ehrenberg, 1845 | | |
| Entomoneis alata (Ehrenberg) Ehrenberg, 1845 | ''Amphiprora alata''; | |
| Entomoneis paludosa (W. Smith) Reimer, 1975 | ''Amphiprora paludosa''; | |
| Grammatophora marina (Lyngbye) Kützing, 1844 | | |
| Grammatophora oceanica Ehrenberg, 1841 | | |
| Grammatophora serpentina (Ralfs) Ehrenberg | | |
| Guinardia delicatula (Cleve) G.R. Hasle, 1996 | ''Rhizosolenia delicatula''; | |
| Hemiaulus hauckii Grunow in Van Heurck, 1882 | | |
| Hyalodiscus ambiguus (Grun.) Temp. Et Perag. 1890 | | |
| Hyalodiscus scoticus (Kützing) Grunow, 1879 | | |
| Leptocylindrus adriaticus Schroder | | |
| Leptocylindrus danicus P.T. Cleve, 1889 | | |
| Leptocylindrus minimus Gran, 1915 | | |
| Licmophora ehrenbergii (Kützing) Grunow, 1867 | | |
| Licmophora flabellata C. Agardh, 1830 | | |
| Licmophora gracilis (Ehrenberg) Grunow, 1867 | | |
| Melosira dubia C.G. Kützing, 1844 | | |
| Melosira lineata (Dillwyn) C.A. Agardh, 1824 | ''Melosira juergensi''; | |
| Melosira moniliformis (O.F. Müller) C. Agardh, 1824 | | |
| Melosira moniliformis var. hispida (Castr.) Hust. | | |
| Melosira moniliformis var. octogona (Grunow) Hustedt | | |
| Melosira moniliformis var. subglobosa (Grunow) Hustedt | | |
| Melosira nummuloides C.A. Agardh, 1824 emend. Crawford, 1975 | | |
| Navicula cancellata Donkin, 1872 | | |
| Navicula pennata var. pontica Mer. | | |
| Nitzschia closterium (Ehrenberg) W. Smith, 1853 | | |
| Nitzschia holsatica Hust | | |
| Nitzschia incerta (Grunow) M.Peragallo 1903 | ''Nitzschia reversa''; | |
| Nitzschia longissima (Brébisson in Kützing) Ralfs in Pritchard, 1861 | | |
| Nitzschia pungens var. atlantica Cleve | | |
| Nitzschia tenuirostris Mer. | | |
| Odontella mobiliensis (J.W. Bailey) Grunow, 1884 | ''Biddulphia mobiliensis''; | |
| Paralia sulcata (Ehrenberg) P.T. Cleve, 1873 | ''Melosira sulcata''; | |
| Petrodictyon gemma (Ehrenberg) D.G. Mann in Round et al., 1990 | ''Surirella gemma''; | |
| Pleurosigma angulatum (Quekett, 1848) Wm. Smith, 1853 | | |
| Pleurosigma angulatum var. strigosa W. Smith | | |
| Pleurosigma elongatum W. Smith, 1852 | | |
| Pleurosigma rigidum Smith, 1853 | | |
| Podosira hormoides (Montagne) Kützing | | |
| Porosira glacialis (Grunow) E. Jørgensen, 1905 | | |
| Proboscia alata (Brightwell) Sundström, 1986 | ''Rhizosolenia alata''; | |
| Pseudo-nitzschia delicatissima (P.T. Cleve, 1897) Heiden, 1928 | ''Nitzschia delicatissima''; | |
| Pseudo-nitzschia pungens (Grunow ex P.T. Cleve, 1897) Hasle, 1993 | ''Nitzschia pungens''; | |
| Pseudo-nitzschia seriata (P.T. Cleve, 1883) H. & M. Peragallo, 1900 | ''Nitzschia seriata''; | |
| Pseudosolenia calcar-avis (Schultze) Sundström, 1986 | ''Rhizosolenia calcar-avis''; | |
| Rhabdonema adriaticum Kützing, 1844 | | |
| Rhizosolenia acuminata (Peragallo 1892) Gran, 1905 | | |
| Rhopalodia musculus (Kützing) O.F. Müller, 1900 | | |
| Skeletonema costatum (Greville) P.T. Cleve, 1878 | | |
| Striatella delicatula (Kützing) Grunow ex Van Heurck, 1881 | | |
| Striatella interrupta (Ehrenb.) Grunow., 1862 | | |
| Striatella unipunctata (Lyngb.) Ag. | | |
| Surirella fastuosa (Ehrenberg) Kützing, 1844 | | |
| Surirella gemma var. reniformis (A. Grunow) A.I. Proshkina-Lavrenko | | |
| Synedra curvata Pr. Lavrenko | | |
| Synedra gaillonii (Bory de Saint-Vincent) Ehrenberg, 1834 | | |
| Synedra parva Kützing | ''Synedra tabulata var. parva''; | |
| Synedra tabulata var. intermedia Grunow | | |
| Tabularia fasciculata (C. Agardh) D.M. Williams & Round, 1986 | ''Synedra tabulata'' and ''Synedra tabulata var. fasciculata'' and ''Synedra tabulata var. obtusa''; | |
| Thalassionema frauenfeldii (Grunow) Hallegraeff, 1986 | ''Thalassiothrix frauenfeldii''; | |
| Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 | | |
| Thalassiosira angulata (Gregory) Hasle, 1978 | ''Thalassiosira decipiens''; | |
| Thalassiosira antiqua var. septata Proschkina-Lavrenko 1955 | | |
| Thalassiosira baltica (Grunow in P.T. Cleve & Grunow) Ostenfeld, 1901 | ''Thalassiosira subsalina'' and ''Coscinodiscus subtilis''; | |
| Thalassiosira coronata Pr.-Lavr., 1955 | | |
| Thalassiosira eccentrica (Ehrenberg) P.T. Cleve, 1903-1904 | | |
| Thalassiosira excentrica var. fasciculata Hustedt | | |
| Thalassiosira gravida P.T. Cleve, 1896 | | |
| Thalassiosira leptopus (Grunow In Van Heurck) Fryxell et Hasle, 1977 | ''Coscinodiscus lineatus''; | |
| Thalassiosira oestrupii (Ostenfeld) Hasle | ''Coscinosira oestrupii''; | |
| Thalassiosira parva Proshk.-Lavr., 1955 | | |
| Thalassiothrix longissima P.T. Cleve & Grunow, 1880 | | |
| Toxarium undulatum J.W. Bailey, 1854 | ''Synedra undulata''; | |