Achnanthes Bory, 1822 (additional source)
Achnanthes brevipes C.Agardh, 1824 (additional source)
Achnanthes coarctata (Brébisson ex W.Smith) Grunow, 1880 (additional source)
Achnanthes exigua Grunow, 1880 (additional source)
Achnanthes hungarica (Grunow) Grunow, 1880 accepted as Lemnicola hungarica (Grunow) F.E.Round & P.W.Basson, 1997 accepted as Achnanthidium hungaricum Grunow, 1863 (additional source)
Achnanthes lanceolata (Brébisson ex Kützing) Grunow, 1880 accepted as Planothidium lanceolatum (Brébisson ex Kützing) Bukhtiyarova, 1999 (additional source)
Achnanthes longipes C.Agardh, 1824 (additional source)
Achnanthes microcephala (Kützing) Grunow, 1880 accepted as Achnanthidium microcephalum Kützing, 1844 (additional source)
Achnanthes minutissima Kützing, 1833 (additional source)
Achnanthes minutissima var. minutissima Kützing, 1833 (basis of record)
Achnanthidium F.T. Kützing, 1844 (additional source)
Achnanthidium coarctatum Brébisson ex W.Smith, 1855 accepted as Achnanthes coarctata (Brébisson ex W.Smith) Grunow, 1880 (additional source)
Achnanthidium hungaricum Grunow, 1863 (additional source)
Achnanthidium lanceolatum Brébisson ex Kützing, 1846 accepted as Planothidium lanceolatum (Brébisson ex Kützing) Bukhtiyarova, 1999 (additional source)
Achnanthidium lanceolatum f. lanceolatum Brébisson ex Kützing, 1846 (basis of record)
Achnanthidium microcephalum Kützing, 1844 (additional source)
Achnanthidium minutissimum (Kützing) Czarnecki, 1994 accepted as Achnanthes minutissima var. minutissima Kützing, 1833 (additional source)
Actinella F.W. Lewis, 1864 (basis of record)
Actinella madagascariensis (Manguin) Kociolek & Rhode, 1998 † accepted as Asterionella madagascariensis f. madagascariensis Manguin in Bourrelly & Manguin, 1949 (additional source)
Actinocyclus C.G. Ehrenberg, 1837 (additional source)
Actinocyclus curvatulus Janisch, 1874 (basis of record)
Actinocyclus ehrenbergii Ralfs, 1861 (additional source)
Actinocyclus octonarius Ehrenberg, 1837 accepted as Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (additional source)
Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (additional source)
Actinocyclus senarius Ehrenberg, 1838 (additional source)
Actinoptychus C.G. Ehrenberg, 1843 (basis of record)
Actinoptychus heliopelta Grunow, 1883 (additional source)
Actinoptychus octonarius (Ehrenberg) Kützing, 1844 accepted as Actinocyclus octonarius var. octonarius Ehrenberg, 1837 (additional source)
Actinoptychus senarius (Ehrenberg) Ehrenberg, 1843 accepted as Actinocyclus senarius Ehrenberg, 1838 (additional source)
Actinoptychus splendens (Shadbolt) Ralfs ex Pritchard, 1861 (additional source)
Amphipentas C.G. Ehrenberg, 1840 † (basis of record)
Amphipentas alternans Ehrenberg, 1843 † (additional source)
Amphipleura F.T. Kützing, 1844 (additional source)
Amphipleura pellucida (Kützing) Kützing, 1844 (additional source)
Amphiprora C.G. Ehrenberg, 1843 (additional source)
Amphiprora alata (Ehrenberg) Kützing, 1844 accepted as Entomoneis alata (Ehrenberg) Ehrenberg, 1845 (additional source)
Amphiprora constricta Ehrenberg, 1843 (additional source)
Amphiprora maxima Gregory, 1857 (basis of record)
Amphiprora maxima var. maxima Gregory, 1857 (basis of record)
Amphiprora ornata Bailey, 1851 accepted as Entomoneis ornata (Bailey) Reimer, 1975 (additional source)
Amphiprora ornata var. ornata J.W. Bailey, 1851 accepted as Entomoneis ornata (Bailey) Reimer, 1975 (basis of record)
Amphiprora paludosa W.Smith, 1853 accepted as Entomoneis paludosa (W.Smith) Reimer, 1975 (additional source)
Amphiprora paludosa var. paludosa W. Smith, 1853 accepted as Entomoneis paludosa (W.Smith) Reimer, 1975 (additional source)
Amphora C.G. Ehrenberg ex F.T. Kützing, 1844 (additional source)
Amphora costata var. costata W. Smith, 1853 (basis of record)
Amphora egregia Ehrenberg, 1861 (additional source)
Amphora lacustris R.E.M. Archibald, 1966 (basis of record)
Amphora laevis Gregory, 1857 (additional source)
Amphora marina W.Smith, 1857 (additional source)
Amphora ostrearia Brébisson, 1849 (additional source)
Amphora ovalis (Kützing) Kützing, 1844 (additional source)
Amphora robusta Gregory, 1857 (additional source)
Ardissonea G. De Notaris in G. De Notaris & F. Baglietto, 1870 (additional source)
Asterionella A.H. Hassall, 1850 (additional source)
Asterionella bleakeleyi var. notata Grunow, 1867 (additional source)
Asterionella formosa Hassall, 1850 (additional source)
Asterionella frauenfeldii Grunow, 1863 represented as Thalassionema frauenfeldii (Grunow) Tempère & Peragallo, 1910 (additional source)
Asterionella glacialis Castracane, 1886 (additional source)
Asterionella japonica Cleve, 1882 (additional source)
Asterionella kariana Grunow, 1880 (additional source)
Asterionella madagascariensis Manguin (additional source)
Asterionella madagascariensis f. madagascariensis Manguin in Bourrelly & Manguin, 1949 (basis of record)
Asterionella notata Grunow ex Van Heurck, 1881 accepted as Asterionella bleakeleyi var. notata Grunow, 1867 (additional source)
Asterionellopsis F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (additional source)
Asterionellopsis glacialis (Castracane) Round, 1990 accepted as Asterionella glacialis Castracane, 1886 (additional source)
Asteromphalus C.G. Ehrenberg, 1844 (additional source)
Asteromphalus flabellatus (Brébisson) Greville, 1859 (additional source)
Asteroplanus C. Gardner & R.M. Crawford in R.M. Crawford & C. Gardner, 1997 (additional source)
Asteroplanus karianus (Grunow) C.Gardner & R.M.Crawford, 1997 accepted as Asterionella kariana Grunow, 1880 (basis of record)
Attheya T. West, 1860 (additional source)
Attheya decora T.West, 1860 (additional source)
Aulacodiscus C.G. Ehrenberg, 1844 (additional source)
Aulacoseira G.H.K. Thwaites, 1848 (additional source)
Aulacoseira granulata (Ehrenberg) Simonsen, 1979 (additional source)
Aulacoseira sphaerica (Héribaud-Joseph) Simonsen accepted as Melosira sphaerica Héribaud, 1903 (basis of record)
Auliscus C.G. Ehrenberg, 1843 (additional source)
Auliscus sculptus (W.Smith) Brightwell, 1860 accepted as Eupodiscus sculptus W.Smith, 1853 (additional source)
Azpeitia M. Peragallo in J. Tempère & H. Peragallo, 1912 (additional source)
Azpeitia nodulifera (A.W.F.Schmidt) G.A.Fryxell & P.A.Sims, 1986 (additional source)
Bacillaria J.F. Gmelin, 1788 (additional source)
Bacillaria interrupta Ehrenberg in Hemprich & Ehrenberg, 1828 (basis of record)
Bacillaria paxillifera (O.F.Müller) T.Marsson, 1901 accepted as Vibrio paxillifer O.F.Müller, 1786 (basis of record)
Bacteriastrum G. Shadbolt, 1854 (additional source)
Bacteriastrum biconicum Pavillard, 1916 (additional source)
Bacteriastrum elegans J.Pavillard (additional source)
Bacteriastrum furcatum Shadbolt, 1854 (additional source)
Bacteriastrum mediterraneum J.Pavillard, 1916 (additional source)
Bacteriastrum varians Lauder, 1864 accepted as Bacteriastrum furcatum Shadbolt, 1854 (additional source)
Bacterosira H.H. Gran, 1900 (additional source)
Bellerochea H. Van Heurck, 1885 (basis of record)
Bellerochea horologicalis Stosch, 1980 (basis of record)
Bellerochea malleus (Brightwell) Van Heurck, 1885 (basis of record)
Biddulphia S.F. Gray, 1821 (basis of record)
Biddulphia alternans (Bailey) Van Heurck, 1885 accepted as Trigonium alternans (Bailey) A.Mann, 1907 accepted as Triceratium alternans f. alternans J.W. Bailey, 1851 (additional source)
Biddulphia aurita (Lyngbye) Brébisson, 1838 accepted as Odontella aurita (Lyngbye) C.Agardh, 1832 (additional source)
Biddulphia dubia (T.Brightwell) Cleve, 1883 accepted as Pseudictyota dubium (Brightwell) P.A. Sims & D. M. Williams in Sims et al., 2018 (additional source)
Biddulphia laevis Ehrenberg, 1843 (additional source)
Biddulphia laevis f. laevis Ehrenberg, 1843 (basis of record)
Biddulphia reticulum (Ehrenberg) Boyer, 1900 accepted as Triceratium reticulum f. reticulum Ehrenberg, 1844 (additional source)
Biddulphia rhombus (Ehrenberg) W.Smith, 1854 (additional source)