, Abas R. Ross & P.A. Sims 1980 , Acanthoceras , Acanthoceras R.M.Crawford in F.E.Round,R.M.Crawford & D.G.mann,1990 , Acanthocerataceae R.M.Crawford in F.E.Round,R.M.Crawford & D.G.mann,1990 , Acanthoceros Kützing, 1845-69 , Achnanthaceae Kützing 1844 , Achnanthales Silva 1962 , Achnanthes 7 , Achnanthes Bory 1822 , Achnanthidiaceae Mann 1990 , Achnanthidium 15 , Achnanthidium F.T. Kützing 1844 , Actinella 1 , Actinella F.W. Lewis, 1864 , Actinocyclus 1 , Actinocyclus C.G Ehrenberg 1837 , Actinoptychus C.G Ehrenberg 1843 , Adlafia , Adlafia Gerd Moser, Lange-Bertalot & Metzeltin, 1998 , Adoneis G.V. Andrews & P. Rivera, 1987 , Afrocymbella , Ailuretta P.A. Sims 1986 , Allonitzschia A. Mann, 1925 , Alveoflexus N.I. Hendey & P.A. Sims, 1984 , Alveus I. Kaczmarska & G.A. Fryxell, 1996 , Amphicampa , Amphicampa (Ehrenberg)Ralfs,1861 , Amphicampha Ehrenberg, 1830 , Amphipleura 1 , Amphipleura F.T. Kützing 1844 , Amphipleuraceae Grunow 1862 , Amphiprora C.G. Ehrenberg 1843 , Amphitetras C.G. Ehrenberg 1840 , Amphora 4 , Amphora C.G. Ehrenberg 1840 , Amphorotia , Anaulaceae (Schütt) Lemmermann 1899 , Anaulales Round & Crawford 1990 , Anaulus C.G. Ehrenberg 1844 , Ancoropsis N.I. Hendey & P.A. Sims, 1984 , Andrewsiella T. Jurkschar, 1997 , Aneumastus 4 , Aneumastus D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Anomoeoneidaceae Mann 1990 , Anomoeoneis , Anomoeoneis E. Pfitzer 1871 , Anorthoneis , Anorthoneis A. Grunow 1868 , Arachnoidiscaceae Round 1990 , Arachnoidiscales Round 1990 , Arachnoidiscus J.W. Bailey ex C.G. Ehrenberg 1849 , Arcocellulus G.R. Hasle, H.A. von Stosch & E.E. Syvertsen 1983 , Ardissonea G. De Notaris in G. De Notaris & F. Baglietto 1870 , Ardissoneaceae Round 1990 , Ardissoneales Round 1990 , Astartiella Witkowski, Lange-Bertalot & Metzeltin, 1998 , Asterionella , Asterionella A.H. Hassall 1850 , Asterionellopsis F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Asterolampra C.G. Ehrenberg 1844 [1845] , Asterolampraceae H.L. Smith 1872 , Asterolamprales Round & Crawford 1990 , Asteromphalus C.G. Ehrenberg 1844 , Attheya T. West 1860 , Attheyaceae Round & Crawford 1990 , Aulacodiscaceae (Schütt) Lemmermann 1903 , Aulacodiscus C. G. Ehrenberg 1844 , Aulacoseira 18 , Aulacoseira G.H.K. Thwaites 1848 , Aulacoseiraceae Crawford 1990 , Aulacoseirales Crawford 1990 , Auliscus C.G. Ehrenberg 1843 , Auricula A.F. Castracane 1873 , Auriculaceae Hendey 1964 , Azpeitia M. Peragallo in J. Tempere & H. Peragallo 1912 , Bacillaria 1 , Bacillaria J.F. Gmelin 1788 , Bacillariaceae Ehrenberg 1831 , Bacillariales Hendey 1937 , Bacillariophyceae Haeckel, 1878 , Bacillariophycidae (Haeckel 1878) Mann 1990 , Bacteriastrum G. Shadbolt 1854 , Bacterosira H.H. Gran 1900 , Banguisia Paddock, 1988 , Baxteriopsis G. Karsten in A. Engler & K. Prantl 1928 , Bellerochea H. Van Heurck 1885 , Bellerocheaceae Crawford 1990 , Bennettella R.W. Holmes 1985 , Bergonia J. Tempere in J. Brun et al. 1891 , Berkeleya R.K. Greville 1827 , Berkeleyaceae Mann 1990 , Berkella R. Ross & P.A. Sims, 1978 , Bicornis J. Fenner, 1947 , Biddulphia S.F. Gray 1821 , Biddulphiaceae Kützing 1844 , Biddulphiales Krieger 1954 , Biddulphiophycidae Round & Crawford 1990 , Biddulphiopsis H.A. von Stosch & R. Simonsen 1984 , Biremis 1 , Biremis D.G. Mann & E.J. Cox in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Bleakeleya F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Bodomonas H.S. Davis, 1947 , Bolidomonadaceae L. Guillou & M.-J. Chrétinnot-Dinet in L. Guillou et al., 1999 , Bolidomonadales L. Guillou & M.-J. Chrétinnot-Dinet in L. Guillou et al., 1999 , Bolidomonas L. Guillou & M.-J. Chrétinnot-Dinet in L. Guillou et al., 1999 , Bolidophyceae L. Guillou & M.-J. Chrétinnot-Dinet in L. Guillou et al., 1999 , Boreozonacola 2 , Brachysira 10 , Brachysira F.T. Kützing 1836 , Brachysiraceae Mann 1990 , Brebissonia 1 , Brebissonia A. Grunow 1860 , Brevilinea , Brevisira , Briggera R. Ross & P.A. Sims 1985 , Brightwellia J. Ralfs in A. Pritchard 1861 , Brockmanniella Hasle, von Stosch & Syvertsen 1983 , Caloneis 4 , Caloneis P.T. Cleve 1894 , Calyptrella U. Hernández-Becerril & M.E. Meave del Castillo, 1996 , Campylodiscus 1 , Campylodiscus C.G. Ehrenberg ex F.T. Kützing 1844 , Campyloneis A. Grunow 1862 , Campylopyxis L.K. Medlin 1985 , Campylosira A. Grunow ex H. Van Heurck 1885 , Capartogramma 1 , Capartogramma Kufferath, 1956 , Caponea A.C. Podzorski 1984 , Carteriportula Flower & Håkansson, 1994 , Catacombas D.M. Williams & F.E. Round, 1986 , Catenula C. Mereschkowsky 1902 [1903] , Catenulaceae Mereschkowsky 1902 , Cavinula 7 , Cavinula D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Cavinulaceae Mann 1990 , Centronella Voigt 1902 , Cerataulina H. Peragallo ex F. Schutt in Engler & Prantl 1896 , Cerataulus C.G. Ehrenberg 1843 , Ceratoneis C.G. Ehrenberg 1839 , Chaetoceros , Chaetoceros C.G. Ehrenberg 1844 , Chaetocerotaceae Ralfs in Pritchard 1861 , Chaetocerotales Round & Crawford 1990 , Chaetocerotophycidae Round & Crawford 1990 , Chamaepinnularia 3 , Chamaepinnularia Lange-Bertalot & Krammer, 1996 , Chrysanthemodiscaceae Round 1978 , Chrysanthemodiscales Round 1978 , Chrysanthemodiscus A. Mann 1925 , Cistula P.T. Cleve 1894 , Climacodium A. Grunow 1868 , Climaconeis A. Grunow 1862 , Climacosphenia C.G. Ehrenberg 1843 , Climacospheniaceae Round 1990 , Climacospheniales Round 1990 , Cocconeidaceae Kützing 1844 , Cocconeis 5 , Cocconeis C.G. Ehrenberg 1837 , Cocconema C.G. Ehrenberg in Hemprich & C.G. Ehrenberg , Corethraceae Lebour 1930 , Corethrales Round & Crawford 1990 , Corethron A.F. Castracane 1886 , Corethrophycidae Round & Crawford 1990 , Coscinodiscaceae Kützing 1844 , Coscinodiscales Round & Crawford 1990 , Coscinodiscophyceae Round & Crawford, 1990 , Coscinodiscophycidae Round & Crawford 1990 , Coscinodiscus C.G. Ehrenberg 1839 , Coscinosira H.H. Gran 1900 , Cosmioneidaceae Mann 1990 , Cosmioneis 3 , Cosmioneis D.G. Mann & A.J. Stickle in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Craspedodiscus C.G. Ehrenberg 1844 , Craspedostauros , Craspedostauros E.J. Cox, 1999 , Craticula 7 , Craticula A. Grunow 1867 , Ctenophora 1 , Ctenophora A. de Brebisson ex F.T. Kutzing 1849 , Cuneolus M.H. Giffen 1970 , Cyclophora A.F. Castracane 1878 , Cyclophoraceae Round & Crawford 1990 , Cyclophorales Round & Crawford 1990 , Cyclostephanos 1 , Cyclostephanos F.E. Round ex Theriot, Hakansson, Kociolek, Round & Stoermer 1987 , Cyclotella 4 , Cyclotella (F.T. Kutzing) A. de Brebisson 1838 , Cyclotubicoalitus Stoermer, Kociolek & Cody, 1990 , Cydostephanos Round , Cylindrospira Mitlehner, 1995 , Cylindrotheca , Cylindrotheca L. Rabenhorst 1859 , Cymatoneis P.T. Cleve 1894 , Cymatonitzschia R. Simonsen 1974 , Cymatopleura 2 , Cymatopleura W. Smith 1851 , Cymatosira A. Grunow 1862 , Cymatosiraceae Hasle, von Stosch & Syvertsen 1983 , Cymatosirales Round & Crawford 1990 , Cymatosirophycidae Round & Crawford 1990 , Cymbella 13 , Cymbella C.A. Agardh 1830 , Cymbellaceae Greville 1833 , Cymbellales Mann 1990 , Cymbellonitzschia 1 , Cymbellonitzschia F. Hustedt in A. Schmidt et al. 1924 , Cymbopleura 27 , Dactyliosolen A.F. Castracane 1886 , Decussata 1 , Delicata , Delphineis G.W. Andrews 1977 , Denticula 1 , Denticula F.T. Kützing 1844 , Denticulopsis R. Simonsen 1979 , Desmogonium C.G. Ehrenberg in R. Schomburgk, 1848 , Detonula F. Schutt 1893 , Diadema K.D. Kemp & T.B.B. Paddock 1989 , Diademoides K-.D.Kemp & T.B.B.Paddock,1990 , Diadesmidaceae Mann 1990 , Diadesmis 2 , Diadesmis F.T. Kützing 1844 , Diatoma 4 , Diatoma J.B.M. Bory de Saint-Vincent 1824 , Diatomella 1 , Diatomella R.K. Greville 1855 , Dickieia Berkeley ex Kützing.1844 , Dictyoneidaceae Mann 1990 , Dictyoneidales Mann 1990 , Dictyoneis P.T. Cleve 1890 , Didymosphenia 1 , Didymosphenia M. Schmidt in A. Schmidt et al. 1899 , Dimerogramma J. Ralfs in A. Pritchard 1861 , Dimerogrammopsis M. Ricard 1987 , Dimidiata M. Hajos 1974 , Diplomenora K. Blaze 1984 , Diploneidaceae Mann 1990 , Diploneidineae Mann 1990 , Diploneis 1 , Diploneis (C. G. Ehrenberg) P.T. Cleve 1894 , Diprora 1 , Discostella , Distrionella 1 , Distrionella D.M. Williams, 1990 , Ditylum J.W. Bailey ex L.W. Bailey 1861 , Donkinia J. Ralfs in A. Pritchard 1861 , Echinella Lyngbye, 1819 , Ellerbeckia 1 , Ellerbeckia R.M. Crawford 1988 , Encyonema 11 , Encyonema F.T. Kützing 1833 , Encyonopsis 19 , Endictyaceae Crewford 1990 , Entomoneidaceae Reimer 1975 , Entomoneis 4 , Entomoneis (C.G. Ehrenberg) C.G. Ehrenberg 1845 , Entopyla C.G. Ehrenberg 1848 , Entopylaceae Grunow 1862 , Envekadea 1 , Eolimna 1 , Ephemera Paddock, 1988 , Epipellis R.W. Holmes 1985 , Epithemia 5 , Epithemia Brébisson ex Kützing, 1844 , Ethmodiscaceae Round 1990 , Ethmodiscales Round 1990 , Ethmodiscus A.F. Castracane 1886 , Eucampia C.G. Ehrenberg 1839 , Eucocconeis 4 , Eucocconeis P.T. Cleve ex F. Meister 1912 , Eunotia 35 , Eunotia C.G. Ehrenberg, 1837 , Eunotiaceae Kützing, 1844 , Eunotiales Silva, 1962 , Eunotiophyceae Mann, 1990 , Eunotogramma J.F. Weisse 1854 , Eupodiscus 1 , Eupodiscus C.G. Ehrenberg 1844 , Extubocellulus G.R. Hasle, H.A. von Stosch & E.E. Syvertsen 1983 , Falcula M. Voigt 1960 , Fallacia 3 , Fallacia A.J. Stickle & D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Fenestrella R.K. Greville 1863 , Fistulifera , Fistulifera Lange-Bertalot, 1997 , Fogedia Witkowski, Lange-Bertalot & Metzeltin, 1998 , Fossula G.R.hasle,E.E.Syvertsen & C.H.von Quillfeldt,1966 , Fragilaria 4 , Fragilaria H.C. Lyngbye 1819 , Fragilariaceae Greville 1833 , Fragilariales Silva 1962 , Fragilariforma 3 , Fragilariforma D.M. Williams & F.E. Round 1988 , Fragilariophyceae Round, 1990 , Fragilariophycidae Round 1990 , Fragilariopsis F. Hustedt in A. Schmidt et al. 1913 , Frankophila H.lange-Bertalot , Frickea 1 , Frickea H. Heiden in A. Schmidt et al. 1906 , Frustulia 14 , Frustulia C.A. Agardh 1824 , Geissleria 6 , Geissleria Lange-Bertalot & Metzeltin, 1996 , Gephyria G.A.W. Arnott 1858 , Gladius A. Forti & P. Schulz 1932 , Glorioptychus G D. Hanna 1927 , Glyphodesmis R.K. Greville 1862 , Gomphocymbella O.F. Müller 1905 , Gomphoneis 14 , Gomphoneis P.T. Cleve 1894 , Gomphonema 14 , Gomphonema C.G. Ehrenberg 1831 , Gomphonemataceae Kützing 1844 , Gomphonemopsis L. Medlin in L. Medlin & F.E. Round 1986 , Gomphonitzschia A. Grunow 1868 , Gomphopleura H. Reichelt ex Tempere 1894 , Gomphoseptatum L. Medlin in L. Medlin & F.E. Round 1986 , Gomphosphenia 2 , Gomphosphenia H. Lange-Bertalot, 1995 , Gomphotheca N.I. Hendey & P.A. Sims 1982 , Gonioceros H. Peragallo in H. Peragallo & M. Peragallo 1907 , Gossleriella F. Schütt, 1892 , Gossleriellaceae Round 1990 , Grammatophora C.G. Ehrenberg 1839 , Guinardia H. Peragallo 1892 , Gyrodiscus O.N. Witt 1886 , Gyrosigma 1 , Gyrosigma A.H. Hassall 1845 , Halamphora 6 , Hannaea 1 , Hannaea R. Patrick in R. Patrick & C.W. Reimer 1966 , Hantzschia , Hantzschia A. Grunow 1877 , Haslea , Haslea R. Simonsen 1974 , Helicotheca M. Ricard, 1987 , Heliopelta C.G. Ehrenberg, 1844 , Heliopeltaceae Hendey 1937 , Hemiaulaceae Heiberg 1863 , Hemiaulales Round & Crawford 1990 , Hemiaulus C.G. Ehrenberg 1844 , Hemidiscaceae Hendey 1937 , Hemidiscus G.C. Wallich 1860 , Hippodonta 5 , Hippodonta Lange-Bertalot, Witkowski & Metzeltin, 1996 , Hustedtiella Simonsen, 1960 , Hyalodiscaceae Crawford 1990 , Hyalosira (Kützing, 1844)Round & Basson, 1997 , Hyalosynedra D.M. Williams & F.E. Round 1986 , Hydrosera , Hydrosera G.C. Wallich 1858 , Hydrosilicon J. Brun 1891 , Hygropetra 1 , Isthmia C.A. Agardh 1832 , Karayevia 7 , Karayevia Round & Bukhtiyarova ex Round 1996 , Keratophora J. Pantocsek 1889 , Kittonia E. Grove & G. Sturt 1887 , Kobayasia Lange-Bertalot, 1996 , Kobayasiella 6 , Kobayasiella Lange-Bertalot, 1999 , Kolbesia Round & Bukhtiyarova ex Round 1996 , Kraskella , Krasskella R. Ross & P.A. Sims 1978 , Labellicula Ven De Vijver, Frenot, Beyens & Lange-Bertalot, 2005 , Lampriscus A. Schmidt in A. Schmidt et al. 1882 , Lauderia (Schütt) Lemmermann 1899 , Lauderiaceae (Schütt)Lemmermann,1899 , Lemnicola 1 , Lemnicola Round & Basson, 1997 , Lennoxia Thomsen & Buck, 1993 , Lepidodiscus O.N. Witt 1886 , Leptocylindraceae Lebour 1930 , Leptocylindrales Round & Crawford 1990 , Leptocylindrus P. T. Cleve in C. G. J. Petersen 1889 , Leyanella G.R. Hasle, H.A. von Stosch & E.E. Syvertsen 1983 , Licmophora C.A. Agardh 1827 , Licmophoraceae Kützing 1844 , Licmophorales Round 1990 , Licmosphenia C. Mereschkowsky 1902 , Lioloma Hasle, 1997 , Lithodesmiaceae H. & M. Peragallo 1897 - 1908 , Lithodesmiales Round & Crawford 1990 , Lithodesmioides H.A. von Stosch 1987 , Lithodesmiophycidae Round & Crawford 1990 , Lithodesmium C.G. Ehrenberg 1839 , Luticola , Luticola D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Lyrella N.I. Karayeva 1978 , Lyrellaceae Mann 1990 , Lyrellales Mann 1990 , Manguinea Paddock, 1988 , Mannsia Paddock, 1988 , Martyana F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Mastogloia 7 , Mastogloia Thwaites ex W. Smith 1856 , Mastogloiaceae Mereschkowsky 1903 , Mastogloiales Mann 1990 , Mastogonia C.G. Ehrenberg 1844 , Mayamaea , Melonavicula Christian, 1886 , Melosira 2 , Melosiraceae Kützing 1844 , Melosirales Crawford 1990 , Membraneis Paddock, 1988 , Meridion 3 , Meridion C.A. Agardh 1824 , Mesodictyon E. Theriot & J.P. Bradbury 1987 , Meuniera Silva in Hasle & Syvertsen, 1996 , Microcostatus , Microcostatus Johansen & Sray, 1998 , Microfissurata , Microsiphona Weber 1970 , Microtabella F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Minidiscus G.R. Hasle 1973 , Minutocellulus Hasle, von Stosch & Syvertsen, 1983 , Minutocellus G.R. Hasle, H.A. von Stosch & E.E. Syvertsen 1983 , Miraltia D. Marino, M. Montresor & A. Zingone, 1988 , Muelleria , Navicula 76 , Navicula J.B.M. Bory de Saint-Vincent 1822 , Naviculaceae Kützing 1844 , Naviculadicta H. Lange-Bertalot, 1994 , Naviculales Bessey 1907 , Naviculineae (Bessey 1907) Hendey 1937 , Navicymbula 1 , Neidiaceae Mereschkowsky 1903 , Neidiineae Mann 1990 , Neidiomorpha , Neidiopsis 3 , Neidiopsis Lange-Bertalot & Metzeltin, 1999 , Neidium 3 , Neidium E. Pfitzer 1871 , Neocalyptrella U. Hernández-Becerril & M.E. Meave del Castillo, 1997 , Neodelphineis H. Takano 1982 , Neodenticula Akiba & Yanagisawa, 1986 , Neofragilaria D.M. Williams & F.E. Round, 1988 , Neohuttonia O. Kuntze, 1898 , Neostreptotheca H.A. von Stosch 1977 , Neosynedra D.M. Williams & F.E. Round 1986 , Nitzschia 38 , Nitzschia A.H. Hassall 1845 , Nupela 15 , Nupela Vyverman & Compère, 1991 , Odontella C.A. Agardh 1832 , Oestrupia H. Heiden ex F. Hustedt 1935 , Opephora P. Petit 1888 , Ophidocampa C.G. Ehrenberg, 1870 , Oricymba , Orthoseira , Orthoseiraceae Crawford 1990 , Orthoseirales Crawford 1990 , Oxyneis F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Pachyneis R. Simonsen 1974 , Palmeria R.K. Greville 1865 , Palmerina G.R. Hasle, 1996 , Papiliocellulus G.R. Hasle, H.A. von Stosch & E.E. Syvertsen 1983 , Paralia P.A.C. Heiberg 1863 , Paraliaceae Crawford 1988 , Paraliales Crawford 1990 , Parlibellus 1 , Parlibellus E.J. Cox 1988 , Parthaea Gowthaman, 1996 , Pauliella F.E. Round & P.W. Basson , Pelagodictyon K.B. Clarke, 1994 , Perissonoë G.W. Andrews & V.A. Stoelzel 1984 , Peronia A. de Brebisson & G.A.W. Arnott ex F. Kitton 1868 , Peroniaceae (Karsten) Topachevs'kyj & Oksiyuk 1960 , Perrya F. Kitton 1874 , Petrodictyon D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Petroneis A.J. Stickle & D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Phaeodactylaceae Silva 1962 , Phaeodactylineae Lewin 1958 , Phaeodactylum K. von Bohlin 1897 , Pilocaenicus Round & Håkansson, 1992 , Pinnularia 5 , Pinnularia C.G. Ehrenberg 1843 , Pinnulariaceae Mann 1990 , Placoneis 2 , Placoneis C. Mereschkowsky 1903 , Plagiodiscus A. Grunow & T. Eulenstein in A. Grunow 1867 , Plagiogramma R.K. Greville 1859 , Plagiogrammaceae De Toni 1890 , Plagiogrammopsis G.R. Hasle, H.A. von Stosch & E.E. Syvertsem 1983 , Plagiolemma Paddock, 1988 , Plagiotropidaceae Mann 1990 , Plagiotropis 2 , Plagiotropis E. Pfitzer 1871 , Planktoniella F. Schutt 1892 , Planothidium 11 , Planothidium Round & Bukhtiyarova 1996 , Platessa 6 , Playaensis 1 , Pleurocyclos S.J. Casper & W. Scheffler 1986 , Pleurocyclus C.J. Casper & W. Scheffler, 1986 , Pleurosigma W. Smith 1852 , Pleurosigmataceae Mereschkowsky 1903 , Pleurosira 1 , Pleurosira (G. Meneghini) V.B.A. Trevisan di San Leon 1848 , Pliocaenicus , Pliocaenicus Round & Håkansson, 1992 , Podocystis J.W. Bailey 1854 , Porannulus P.B. Hamilton & M. Poulin, 1990 , Porguenia M.J. Sullivan, 1997 , Porosira Jorgensen 1905 , Porpeia J.W. Bailey ex J. Ralfs in A. Pritchard 1861 , Prestauroneis 1 , Proboscia B.G. Sundström 1986 , Progonoia H. J. Schrader 1969 , Proschkinia N.I. Karayeva, 1978 , Proschkiniaceae Mann 1990 , Protokeelia C. W. Reimer et J. J. Lee 1984 , Protoraphidaceae Simonsen 1970 , Protoraphidales Round 1990 , Protoraphis R. Simonsen 1970 , Psammodictyon D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Psammodiscaceae Round & Mann 1990 , Psammodiscus Round & Mann 1980 , Psammosynedra F.E. Round, 1993 , Psammothidium 14 , Psammothidium Bukhtiyarova & Round 1996 , Pseudauliscus A. Schmidt in A. Schmidt et al. 1875 , Pseudoeunotia Grunow in Van Heurck 1881 , Pseudofallacia 1 , Pseudogomphonema L.K. Medlin in L.K. Medlin & F.E. Round 1986 , Pseudohimantidium F. Hustedt & G. Krasske in G. Krasske 1941 , Pseudonavicula G. Karsten, 1899 , Pseudo-nitzschia H. Peragallo in H. Peragallo & M. Peragallo 1900 , Pseudorutilaria (Grove & Sturt ex De Toni & Levi) Grove & Sturt ex De Toni 1894 , Pseudosolenia B.G. Sundström 1986 , Pseudostaurosira 7 , Pseudostaurosira D.M. Williams & F.E. Round 1988 , Pseudostaurosiropsis , Pseudotriceratium A. Grunow 1884 , Pteroncola R.W. Holmes & D.A. Croll 1984 , Punctastriata 1 , Punctastriata D.M. Williams & F.E. Round 1988 , Puncticulata 3 , Pyrgupyxis N.I. Hendey 1969 , Pyxilla R.K. Greville 1865 , Pyxillaceae (Schütt) Simonsen 1972 , Raphidodiscus H.L. Smith ex T. Christian 1887 , Reimeria 2 , Reimeria J.P. Kociolek & E.F. Stoermer 1987 , Rexlowea 1 , Rhabdonema F.T. Kützing 1844 , Rhabdonemataceae Round & Crawford 1990 , Rhabdonematales Round & Crawford 1990 , Rhaphoneidaceae Forti 1912 , Rhaphoneidales Round 1990 , Rhaphoneis Rhaphoneis C.G. Ehrenberg 1844 , Rhizosolenia C.G. Ehrenberg 1843 , Rhizosoleniaceae De Toni 1890 , Rhizosoleniales Silva 1962 , Rhizosoneniophycidae Round & Crawford 1990 , Rhoicosigma A. Grunow 1867 , Rhoicosphenia 1 , Rhoicosphenia A. Grunow 1860 , Rhoicospheniaceae Chen & Zhu 1983 , Rhoikoneis Rhoikoneis A. Grunow 1863 , Rhopalodia 2 , Rhopalodia O. Muller 1895 , Rhopalodiaceae (Karsten) Topachevs'kyj & Oksiyuk 1960 , Rhopalodiales Mann 1990 , Riedelia Jousé & Sheshukova-Poretzkaja 1971 , Rocella G D. Hanna 1930 , Rocellaceae Round & Crawford 1990 , Roperia A. Grunow ex J. Pelletan 1889 , Rossia M. Voigt 1960 , Rossithidium 5 , Rossithidium Round & Bukhtiyarova 1996 , Roundia I.V. Makarova, 1994 , Rutilaria R.K. Greville 1863 , Rutilariaceae De Toni 1894 , Rylandsia R.K. Greville & J. Ralfs in R.K. Greville 1861 , Sceptroneis C. G. Ehrenberg 1844 , Schroederella J. Pavillard 1913 , Scolioneidaceae Mann 1990 , Scolioneis D.G. Mann in Round at alii 1990 , Scoliopleura , Scoliopleura Grunow 1860 , Scoliotropidaceae Mereschkowsky 1903 , Scoliotropis Cleve 1894 , Sellaphora 11 , Sellaphora Mereschowsky 1902 , Sellaphoraceae Mereschkowsky 1902 , Sellaphorineae Mann 1990 , Seminavis D.G. Mann in F.E. Round, R.M. Crawford & D.G. Mann 1990 , Semiorbis R.M. Patrick in R.M. Patrick & Reimer, 1966 , Seshukovia S.I. Gleser, 1975 , Sheshukovia S. I. Gleser 1975 , Simonsenia 1 , Simonsenia H. Lange-Bertalot 1979 , Skeletonema , Skeletonema R.K. Greville 1865 , Skeletonemataceae Lebour, 1930 , Sphynctolethus Hanna 1927 , Stauroforma 1 , Stauroforma R. Flower, V. Jones & F.E. Round , Stauroneidaceae Mann 1990 , Stauroneis 45 , Stauroneis Ehrenberg 1843 , Staurophora 5 , Staurophora Mereschkowsky, 1903 , Stauropsis Meunier 1907 , Stauroptera Ehrenberg , Staurosira 3 , Staurosira C. G. Ehrenberg 1843 , Staurosirella 5 , Staurosirella D.M. Wiliams & F.E. Round 1988 , Staurotropis Paddock, 1988 , Stellarima Hasle & P.A. Sims 1986 , Stenoneis T.P. Cleve 1894 , Stenopterobia , Stenopterobia Brébisson ex Van Heurck 1896 , Stephanocostis S.I. Genkal & A.E. Kuzmina 1985 , Stephanocyclus , Stephanocyclus Skabitschevsky , Stephanodiscaceae Glezer & Makarova 1986 , Stephanodiscus 4 , Stephanodiscus C.G. Ehrenberg 1845 , Stephanopyxidaceae Nikolaev in Round et alli 1990 , Stictocyclaceae F.E. Rounf, 1978 , Stictocyclales F.E. Round in F.E. Round, R.M. Crawford & D.G. Mann, 1990 , Stictocyclus A. Mann 1925 , Stictodiscaceae (Schütt) Simonsen 1972 , Stictodiscales Round & Crawford 1990 , Stictodiscus Greville 1861 , Stilus Paddock, 1988 , Stoschiella L. Guillou & M.-J. Chrétiennot-Dinet in L. Guillou et al., 1999 , Strangulonema R.K. Greville 1865 , Strelnikovia R. Ross & P.A. Sims 1985 , Streptotheca Shrubsole 1870 , Streptothecaceae Crawford 1990 , Striatella C.A. Agardh, 1832 , Striatellaceae Kützing 1844 , Striatellales Round 1990 , Subsilicea H.A. von Stosch & B.E.F. Reimann 1970 , Surirella 11 , Surirella Turpin 1828 , Surirellaceae Kützing 1844 , Surirellales Mann 1990 , Symbolophora C. G. Ehrenberg 1844 , Syndetocystis Ralfs ex Greville 1866 , Synedra 3 , Synedra Ehrenberg 1830 , Synedropsis Hassle, Medlin et Syvertsen 1998 , Synedrosphenia (H. Peragallo) Azpeitia Moros, 1911 , Tabellaria 2 , Tabellaria C.G. Ehrenberg 1840 , Tabellariaceae Kützing 1844 , Tabellariales Round 1990 , Tabularia 1 , Tabularia (Kützing 1844) Williams & Round 1986 , Takanoa I.V. Makarova, 1994 , Terpsinoë 1 , Terpsinoë C.G. Ehrenberg 1843 , Tertiariopsis Khursevich & Kociolek, 2002 , Tertiarius Håkansson & Khursevich, 1997 , Tetracyclus , Tetracyclus Ralfs 1843 , Thalassiocyclus Håk. & Mahood 1993 , Thalassioneis F.E. Round 1990 , Thalassionema Grunow 1881 , Thalassionemataceae Round 1990 , Thalassionematales Round 1990 , Thalassiophysa Conger 1954 , Thalassiophysaceae Mann 1990 , Thalassiophysales Mann 1990 , Thalassiophyssa Conger, 1954 , Thalassiosira 2 , Thalassiosira P.T. Cleve 1873 , Thalassiosiraceae Lebour 1930 , Thalassiosirales Glezer & Makarova 1986 , Thalassiosirophycidae Round & Crawford 1990 , Thalassiothrix Cleve & Grunow 1880 , Tibetiella , Toxariaceae Round 1990 , Toxariales Round 1990 , Toxarium Bailey 1854 , Toxonidea A.S. Donkin 1858 , Trachyneis Cleve 1894 , Trachysphenia Petit in Folin et Périer 1877 , Triceratiaceae (Schütt) Lemmermann 1899 , Triceratiales Round & Crawford 1990 , Triceratium Ehrenberg 1841 [1839] , Trichotoxon Reid & Round 1988 , Trigonium P.T. Cleve 1867 , Trinacria Heiberg 1863 , Trossulus R. Ross & P.A. Sims , Tryblionella 3 , Tryblionella W. Smith 1853 , Ulnaria , Undatella T. B. B. Paddock et P. A. Sims 1980 , Urosolenia , Urosolenia F.E. Round & R.M. Crawford in F.E. Round, R.M. Crawford & D.G. Mann 1990