Acanthoceras Honigm., 1910 (basis of record)
Acanthoceras magdeburgense Honigm., 1910 accepted as Acanthoceras zachariasii (Brun) Simonsen, 1979 (basis of record)
Acanthoceras zachariasii (Brun) Simonsen, 1979 (basis of record)
Acanthocerataceae Round, Crawford & Mann, 1990 (basis of record)
Achnanthaceae Kützing, 1844 (basis of record)
Achnanthales (basis of record)
Achnanthes Bory, 1822 (basis of record)
Achnanthes altaica (V.S.Poretzky) A.Cleve, 1953 accepted as Psammothidium altaicum (Poretzky) L.Bukhtiyarova, 1996 (basis of record)
Achnanthidiaceae D.G. Mann, 1990 (basis of record)
Achnanthidium F.T. Kützing, 1844 (basis of record)
Actinocyclus C.G. Ehrenberg, 1837 (additional source)
Actinoptychus C.G. Ehrenberg, 1843 (additional source)
Amphipleura F.T. Kützing, 1844 (additional source)
Amphipleuraceae Grunow, 1862 (basis of record)
Amphiprora C.G. Ehrenberg, 1843 (basis of record)
Amphora C.G. Ehrenberg ex F.T. Kützing, 1844 (basis of record)
Anaulaceae (Schütt) Lemmermann, 1899 (additional source)
Anaulales (additional source)
Anaulus C.G. Ehrenberg, 1844 (additional source)
Aneumastus D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Anomoeoneidaceae D.G. Mann, 1990 (basis of record)
Anomoeoneis E. Pfitzer, 1871 (additional source)
Anorthoneis A. Grunow, 1868 (additional source)
Ardissonea G. De Notaris in G. De Notaris & F. Baglietto, 1870 (additional source)
Ardissoneaceae Round (basis of record)
Ardissoneales (basis of record)
Asterionella A.H. Hassall, 1850 (additional source)
Asterionellopsis F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Asterolampraceae Smith, 1872 (additional source)
Asterolamprales (additional source)
Asteromphalus C.G. Ehrenberg, 1844 (additional source)
Attheya T. West, 1860 (basis of record)
Attheya zachariasii Brun, 1894 accepted as Acanthoceras zachariasii (Brun) Simonsen, 1979 (basis of record)
Attheyaceae Round & R. M. Crawford (additional source)
Aulacodiscaceae (Schütt) Lemmermann, 1903 (basis of record)
Aulacodiscus C.G. Ehrenberg, 1844 (additional source)
Aulacoseira G.H.K. Thwaites, 1848 (additional source)
Aulacoseiraceae Crawford (additional source)
Aulacoseirales (basis of record)
Auliscus C.G. Ehrenberg, 1843 (additional source)
Auricula A.F. Castracane, 1873 (additional source)
Auriculaceae Hendey (additional source)
Azpeitia M. Peragallo in J. Tempère & H. Peragallo, 1912 (basis of record)
Azpeitia M. Peragallo in J. Tempère & H. Peragallo, 1912 (additional source)
Bacillaria J.F. Gmelin, 1788 (basis of record)
Bacillariaceae Ehrenberg, 1831 (basis of record)
Bacillariales (basis of record)
Bacillariophyceae (additional source)
Bacillariophyta (additional source)
Bacteriastrum G. Shadbolt, 1854 (basis of record)
Bellerochea H. Van Heurck, 1885 (additional source)
Bellerocheaceae Crawford, 1990 (basis of record)
Berkeleyaceae Mann (basis of record)
Biddulphia S.F. Gray, 1821 (additional source)
Biddulphiaceae Kützing, 1844 (basis of record)
Biddulphiales (basis of record)
Biddulphiophycidae accepted as Biddulphianae (basis of record)
Bleakeleya F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (basis of record)
Brachysira F.T. Kützing, 1836 (additional source)
Brachysiraceae Mann, 1990 (original description)
Brebissonia A. Grunow, 1860 (additional source)
Brockmanniella G.R. Hasle, H.A. von Stosch & E.E. Syvertsen, 1983 (additional source)
Campylodiscus C.G. Ehrenberg ex F.T. Kützing, 1844 (additional source)
Campylosira A. Grunow ex H. Van Heurck, 1885 (additional source)
Catacombas D.M. Williams & F.E. Round, 1986 (additional source)
Catenula C. Mereschkowsky, 1903 (basis of record)
Catenulaceae Mereschkowsky, 1902 (basis of record)
Cavinula D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (additional source)
Cavinulaceae D.G. Mann (additional source)
Cerataulina H. Peragallo ex F. Schütt in Engler & Prantl, 1896 (additional source)
Cerataulus Ehrenberg, 1844 (additional source)
Chaetoceros C.G. Ehrenberg, 1844 (basis of record)
Chaetocerotaceae Ralfs, 1861 (basis of record)
Chaetocerotales accepted as Chaetocerotanae (basis of record)
Chaetocerotophycidae accepted as Chaetocerotanae (basis of record)
Cocconeidaceae Kützing, 1844 (basis of record)
Cocconeis C.G. Ehrenberg, 1837 (basis of record)
Corethraceae Lebour, 1930 (basis of record)
Corethrales (basis of record)
Corethron A.F. Castracane, 1886 (basis of record)
Corethrophycidae accepted as Corethranae (basis of record)
Coscinodiscaceae Kützing, 1844 (basis of record)
Coscinodiscales (basis of record)
Coscinodiscophyceae accepted as Coscinodiscophycidae (additional source)
Coscinodiscophycidae (basis of record)
Coscinodiscus C.G. Ehrenberg, 1839 (additional source)
Cosmioneidaceae D. G. Mann (additional source)
Cosmioneis D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann, 1990 (additional source)
Ctenophora (Grunow) D.M.Williams & Round, 1986 (basis of record)
Cyclostephanos F.E. Round ex Theriot, Hakansson, Kociolek, Round & Stoermer, 1987 (additional source)
Cyclostephanos dubius (Hustedt) Round, 1988 accepted as Cyclotella dubia var. dubia Fricke in Schmidt et al., 1900 (basis of record)
Cyclotella (F.T. Kützing) A. de Brébisson, 1838 (additional source)
Cylindrotheca L. Rabenhorst, 1859 (basis of record)
Cymatopleura W. Smith, 1851 (basis of record)
Cymatosira A. Grunow, 1862 (additional source)
Cymatosiraceae Hasle, von Stosch & Syvertsen, 1983 (basis of record)
Cymatosirales (basis of record)
Cymatosirophycidae accepted as Cymatosirophycanae (basis of record)
Cymbella C.A. Agardh, 1830 (additional source)
Cymbellaceae Greville, 1833 (basis of record)

 Classification

 for Bellerocheaceae Crawford, 1990

There is considerable confusion in the literature concerning the status of these groups and of the exact allocation ... [details]

 Classification

 for Cerataulus smithii Ralfs ex Pritchard, 1861

It is suggested that Cerataulus smithii belongs with other species in the 'reticula' group of Biddulphia which ... [details]

 Classification

 for Leptocylindrales

This group is tentatively placed until further studies can be made. [details]

 Classification

 for Stauropsis A. Meunier, 1910

Uncertain taxonomic position. [details]

 Homonymy

 for Biremis Polloni, Rowe & Teal, 1973

Hemihomonym (name used in two Code jurisdictions). There is also a genus of diatoms named Biremis Mann & Cox, 1990 ... [details]

 Type designation

 for Achnanthepyla Perag., 1921

... [details]