• Achnanthes bahusiensis (Grunow) Lange-Bert., 1989 accepted as Astartiella bahusiensis (Grunow) Witkowski, Lange-Bertalot & Metzeltin, 1998 accepted as Navicula minuscula var. bahusiensis Grunow, 1880
• Achnanthes brevipes C.Agardh, 1824
• Achnanthes brevipes var. intermedia (Kützing) Cleve, 1895 accepted as Achnanthes intermedia Kützing, 1833
• Achnanthes delicatula (Kützing) Grunow in Cleve & Grunow, 1880 accepted as Planothidium delicatulum (Kützing) Round & Bukhtiyarova, 1996 accepted as Achnanthidium delicatulum f. delicatulum Kützing, 1844
• Achnanthes delicatula subsp. hauckiana (Grunow) Lange-Bertalot & Ruppel, 1980 accepted as Planothidium hauckianum (Grunow) Round & Bukhtiyarova, 1996
• Achnanthes hauckiana Grunow, 1880 (uncertain > unassessed)
• Achnanthes hauckiana var. hauckiana Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
• Achnanthes hauckiana var. rostrata Schulz, 1926 (uncertain > unassessed)
• Achnanthes intermedia Kützing, 1833 (uncertain > unassessed)
• Achnanthes longipes C.Agardh, 1824
• Achnanthes obliqua (Gregory) Hustedt, 1924 accepted as Gololobovia obliqua (W.Gregory) Kulikovskiy, Glushchenko & Kociolek in Kulikovskiy et al., 2020
• Achnanthes subsessilis Kützing, 1833 accepted as Achnanthes brevipes var. intermedia (Kützing) Cleve, 1895 accepted as Achnanthes intermedia Kützing, 1833
• Achnanthes taeniata Grunow, 1880 accepted as Pauliella taeniata (Grunow) F.E.Round & P.W.Basson, 1997
• Achnanthidium delicatulum sensu Schumann, 1867 (uncertain > unassessed)
• Achnanthidium delicatulum f. delicatulum Kützing, 1844 (uncertain > unassessed)
• Actinocyclus normanii (Gregory) Hustedt, 1957
• Actinocyclus normanii f. subsalsus (Juhlin-Dannfelt) Hustedt
• Actinocyclus octonarius Ehrenberg, 1837 accepted as Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837
• Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (uncertain > unassessed)
• Actinocyclus senarius Ehrenberg, 1838 (uncertain > unassessed)
• Actinocyclus tenuissimus Cleve, 1878
• Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837
• Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838
• Actinoptychus splendens (Shadbolt) Ralfs ex Pritchard, 1861
• Actinoptychus undulatus (J.W.Bailey) Ralfs, 1861 accepted as Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838
• Adlafia minuscula (Grunow) Lange-Bertalot, 1999
• Amphipentas alternans Ehrenberg, 1843 † (uncertain > unassessed)
• Amphipleura pellucida (Kützing) Kützing, 1844
• Amphipleura sigmoidea W.Smith, 1853 (uncertain > unassessed)
• Amphiprora alata (Ehrenberg) Kützing, 1844 accepted as Entomoneis alata (Ehrenberg) Ehrenberg, 1845
• Amphiprora concilians Cleve, 1896 (uncertain > unassessed)
• Amphiprora duplex Donkin, 1858
• Amphiprora duplex var. duplex Donkin, 1858 (uncertain > unassessed)
• Amphiprora hyalina Greville, 1865 (uncertain > unassessed)
• Amphiprora kjellmanii Cleve, 1880 accepted as Entomoneis kjellmanii (Cleve) Poulin & Cardinal, 1983 accepted as Amphiprora kjellmanii var. kjellmanii Cleve in Cleve & Grunow, 1880
• Amphiprora kjellmanii var. kjellmanii Cleve in Cleve & Grunow, 1880 (uncertain > unassessed)
• Amphiprora longa Cleve, 1873 (uncertain > unassessed)
• Amphiprora paludosa W.Smith, 1853 accepted as Entomoneis paludosa (W.Smith) Reimer, 1975
• Amphiprora paludosa var. paludosa W. Smith, 1853 accepted as Entomoneis paludosa (W.Smith) Reimer, 1975
• Amphiprora surirelloides Hendey, 1951 (uncertain > unassessed)
• Amphora coffeaeformis (C.Agardh) Kützing, 1844 accepted as Halamphora coffeaeformis (C.Agardh) Levkov, 2009
• Amphora costata W.Smith, 1853 accepted as Halamphora costata (W.Smith) Levkov, 2009
• Amphora costata var. costata W. Smith, 1853 (uncertain > unassessed)
• Amphora laevis Gregory, 1857
• Amphora laevis var. laevissima (Greg.) Cleve, 1896
• Amphora ovalis (Kützing) Kützing, 1844
• Amphora robusta Gregory, 1857
• Arcocellulus cornucervis G.R.Hasle, H.A.von Stosch & E.E.Syvertsen, 1983 (uncertain > unassessed)
• Arcuatasigma closterioides (Grunow) G.Reid, 2012
• Astartiella bahusiensis (Grunow) Witkowski, Lange-Bertalot & Metzeltin, 1998 accepted as Navicula minuscula var. bahusiensis Grunow, 1880
• Asterionella formosa Hassall, 1850
• Asterionella formosa var. gracillima (Hanztsch) Grunow, 1881 accepted as Diatoma gracillimum Hantzsch in Rabenhorst, 1861
• Asterionella glacialis Castracane, 1886 (uncertain > unassessed)
• Asterionella gracillima (Hantzsch) Heiberg, 1863 (uncertain > unassessed)
• Asterionella japonica Cleve, 1882 (uncertain > unassessed)
• Asterionella kariana Grunow, 1880 (uncertain > unassessed)
• Asterionellopsis glacialis (Castracane) Round, 1990 accepted as Asterionella glacialis Castracane, 1886
• Asterionellopsis kariana (Grunow) Round, 1990 accepted as Asterionella kariana Grunow, 1880
• Asteromphalus hyalinus Karsten, 1905 (uncertain > unassessed)
• Asteroplanus karianus (Grunow) C.Gardner & R.M.Crawford, 1997 accepted as Asterionella kariana Grunow, 1880
• Attheya decora T.West, 1860
• Attheya longicornis R.M.Crawford & C.Gardner, 1994 (uncertain > unassessed)
• Attheya septentrionalis (Østrup) R.M.Crawford, 1994 accepted as Chaetoceros septentrionalis Cleve, 1896
• Aulacoseira ambigua (Grunow) Simonsen, 1979
• Aulacoseira crenulata (Ehrenberg) Thwaites, 1848
• Aulacoseira distans (Ehrenberg) Simonsen, 1979 †
• Aulacoseira granulata (Ehrenberg) Simonsen, 1979
• Aulacoseira granulata var. angustissima (O.F.Müller) Simonsen, 1979 accepted as Melosira granulata f. angustissima Otto Müller, 1899
• Aulacoseira islandica (O.Müller) Simonsen, 1979
• Aulacoseira italica (Ehrenberg) Simonsen, 1979
• Auliscus sculptus (W.Smith) Brightwell, 1860 accepted as Eupodiscus sculptus W.Smith, 1853
• Auliscus spinosus Christian, 1887 (uncertain > unassessed)
• Bacillaria cistula Ehrenberg, 1828 (uncertain > unassessed)
• Bacillaria interrupta Ehrenberg in Hemprich & Ehrenberg, 1828 (uncertain > unassessed)
• Bacillaria paradoxa J.F.Gmelin, 1791 accepted as Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 accepted as Vibrio paxillifer O.F.Müller, 1786
• Bacillaria paxillifer (O.F.Müller) T.Marsson, 1901 accepted as Vibrio paxillifer O.F.Müller, 1786
• Bacillaria paxillifer var. tumidula (Grunow) Witkowski, Lange-Bertalot & Metzeltin, 2000
• Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 accepted as Vibrio paxillifer O.F.Müller, 1786
• Bacteriastrum elongatum Cleve, 1897
• Bacteriastrum hyalinum Lauder, 1864
• Bacterosira bathyomphala (Cleve) Syvertsen & Hasle, 1993 accepted as Coscinodiscus bathyomphalus Cleve, 1883
• Bacterosira fragilis (Gran) Gran, 1900 accepted as Lauderia fragilis Gran, 1897
• Bellerochea horologicalis Stosch, 1980 (uncertain > unassessed)
• Bellerochea malleus (Brightwell) Van Heurck, 1885 (uncertain > unassessed)
• Bellerochea polymorpha Hargraves & Guillard, 1974 (uncertain > unassessed)
• Bellerochea spinifera Hargraves & Guillard, 1974 (uncertain > unassessed)
• Berkeleya rutilans (Trentepohl ex Roth) Grunow, 1880 (uncertain > unassessed)
• Biddulphia alternans (Bailey) Van Heurck, 1885 accepted as Trigonium alternans (Bailey) A.Mann, 1907 accepted as Triceratium alternans f. alternans J.W. Bailey, 1851
• Biddulphia bailey W. Smith, 1856 accepted as Biddulphia mobiliensis (J.W.Bailey) Grunow, 1882 accepted as Trieres mobiliensis (J.W.Bailey) Ashworth & E.C.Theriot in Ashworth, Nakov & E.C.Theiriot, 2013
• Biddulphia biddulphiana (J.E.Smith) Boyer, 1900
• Biddulphia mobiliensis (J.W.Bailey) Grunow, 1882 accepted as Trieres mobiliensis (J.W.Bailey) Ashworth & E.C.Theriot in Ashworth, Nakov & E.C.Theiriot, 2013
• Biddulphia obtusa (Kützing) Ralfs, 1861 accepted as Odontella obtusa Kützing, 1844
• Biddulphia pulchella S.F.Gray, 1821 accepted as Biddulphia biddulphiana (J.E.Smith) Boyer, 1900
• Biddulphia reticulum (Ehrenberg) Boyer, 1900 accepted as Triceratium reticulum f. reticulum Ehrenberg, 1844
• Biddulphia sinensis Greville, 1866 (uncertain > unassessed)
• Brachysira vitrea (Grunow) R.Ross, 1986 accepted as Gomphonema vitreum Grunow, 1878
• Brebissonia boeckii (Ehrenberg) E.O'Meara, 1875 accepted as Cocconema boeckii Ehrenberg, 1838
• Brebissonia lanceolata (C.Agardh) Mahoney & Reimer, 1986 accepted as Gomphonema lanceolatum C.Agardh, 1831
• Brockmanniella brockmannii (Hustedt) Hasle, Stosch & Syvertsen, 1983 accepted as Plagiogramma brockmanni var. brockmanni Hustedt, 1939
• Caloneis limosa (Kützing) R.M.Patrick, 1966 accepted as Navicula limosa f. limosa Kützing, 1844