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Between brackets is the number of
accepted extant species
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2
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3
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4
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5
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Only show main ranks
Bacillariophyceae
(5 957)
Subclass
Bacillariophyceae
incertae sedis
(189)
Family
Eustephaniaceae
Genus
Acanthodiscus
Pant., 1892 †
Genus
Achnanthepyla
Perag., 1921
(5)
Genus
Acigonium
S. Komura, 1999 †
Genus
Actinoclava
O. Müller, 1912 †
Genus
Actinodictyon
J. Pantocsek, 1889 †
Genus
Actinodiscus
R.K. Greville, 1863 †
Genus
Actinogonium
C.G. Ehrenberg, 1847 †
Genus
Actinogramma
C.G. Ehrenberg, 1872
Genus
Actinoneis
P.T. Cleve, 1895
Genus
Actinophaenia
G. Shadbolt, 1854
Genus
Actinostephanos
G.K. Khursevich, 1989
Genus
Aggericorona
S. Komura, 2006 †
Genus
Alloeoneis
J. Schumann, 1867
Genus
Alloioneis
J. Schumann ex P.T. Cleve, 1878
(1)
Genus
Alveolophora
A.I. Moisseeva & T.L. Nevretdinova, 1990 †
Genus
Ambistria
K.E. Lohman & G.W. Andrews, 1968 emend. Siver, 2019 †
Genus
Amblypyrgus
R. Gersonde & D.M. Harwood, 1990 †
Genus
Amphicephalosperma
Meunier
(1)
Genus
Amphidiscus
C.G. Ehrenberg, 1839 †
Genus
Amphipentas
C.G. Ehrenberg, 1840 †
Genus
Amphiraphia
J.-Y. Chen & H.-Z. Zhu, 1983
Genus
Amphitrite
P.T. Cleve ex O. Kunze, 1891
Genus
Amphitropis
L. Rabenhorst, 1868
Genus
Amphoropsis
(Cleve) Mereschkowsky, 1901
Genus
Ancylopyrgus
R. Gersonde & D.M. Harwood, 1990 †
Genus
Angulopyxidium
A.G. Vologdin, 1962 †
Genus
Anisodiscus
A. Grunow in J. Pantocsek, 1886
(1)
Genus
Anisoraphe
R.E. Norris, 1971
Genus
Annellus
J. Tempère in J. Tempère & H. Peragallo, 1908 †
Genus
Annularius
S. Komura, 2005 †
Genus
Antelminellia
F. Schütt, 1893
Genus
Anthemodiscus
J.W. Barker & S.H. Meakin, 1944 †
Genus
Anuloplicata
(Z.I.Glezer) Z.I.Glezer, 1992 †
Genus
Aplotella
(Kützing) L. Agassiz, 1843
Genus
Aporidiscus
Rattray in A. Grunow, 1889
Genus
Aporodiscus
J. Rattray in A. Schmidt et al., 1890
Genus
Apteroe
P.T. Cleve, 1891
Genus
Apterosoma
S.Komura, 1997 †
Genus
Archaegladiopsis
V.A. Nikolaev & D.M. Harwood, 1997
Genus
Archaegoniothecium
J.Witkowski, D.M.Harwood & M.Kulikovskiy, 2012 †
Genus
Archeopantocsekia
Borbas, 1893
Genus
Archepyrgus
R. Gersonde & D.M. Harwood, 1990 †
Genus
Archimedea
J.B.M. Bory de Saint-Vincent, 1824
Genus
Arcus
A.P. Olshtynskaja, 1978 †
accepted as
Fossilarcus
Blanco, 2020 †
Genus
Argonauta
G. Karsten in A. Engler & K. Prantl, 1928
Genus
Aristella
F.T. Kützing, 1834
Genus
Arthrogyra
C.G. Ehrenberg ex Ralfs in Pritchard, 1861
Genus
Arthrotoma
Corda, 1840
Genus
Asterodiscus
A.S. Johnson, 1852
Genus
Asterosiga
accepted as
Astrosiga
W.S.Kent
Genus
Astrosyne
Ashworth & Lobban, 2012
(1)
Genus
Aulacocystis
A.H. Hassall, 1845
Genus
Auriculopsis
N.I. Hendey, 1964
Genus
Bacterosira
H.H. Gran, 1900
(1)
Genus
Bactryllium
O. Heer, 1853
Genus
Baculites
J. Grüss, 1928
Genus
Badiaga
Sprengel
Genus
Balanosa
S. Komura, 1996 †
Genus
Basilicostephanus
R. Gersonde & D.M. Harwood, 1990 †
Genus
Baxteria
H. Van Heurck, 1896
Genus
Belonastrum
(Lemmermann) F.E. Round & N.I. Maidana, 2001
Genus
Belonastrum
E. Lemmermann, 1900
Genus
Belonidium
C.G. Ehrenberg, 1854
Genus
Bifibulatia
H. Takano, 1983
(1)
Genus
Bilingua
R. Gersonde & D.M. Harwood, 1990 †
Genus
Bipalla
Z.I. Gleser, 1992 †
Genus
Bogorovia
A.P. Jousé, 1974 †
Genus
Bolewskia
B. Kwiecinska & J. Sieminska, 2000 †
Genus
Bonea
R. Ross & P.A. Sims, 1987 †
Genus
Botellus
F. Schütt, 1900
Genus
Brachybaculites
J. Grüss, 1928 †
Genus
Brasiliella
C. Zimmermann S.J., 1918
Genus
Brenneckella
H. Lohman, 1912
Genus
Brevilinea
P.A. Siver, P.B. Hamilton & E.A. Morales, 2008
(1)
Genus
Brevisira
K. Krammer, 2001
Genus
Brunia
J. Tempère ex G.B. De Toni, 1894
Genus
Bruniella
H. Van Heurck, 1896
Genus
Bruniopsis
G. Karsten in A. Engler & K. Prantl, 1928
Genus
Calcothrix
N.A. Desvaux in C.A. Agardh, 1830
Genus
Callimastogloia
S. Komura, 2005 †
Genus
Calodiscus
L. Rabenhorst, 1853
Genus
Calophyllum
G. Shadbolt, 1854
Genus
Calyptosporium
D.M. Harwood & R. Gersonde, 1990 †
Genus
Campylostylus
G. Shadbolt ex C.S. Boyer, 1927
Genus
Capsula
J. Brun, 1896 †
Genus
Carrodoria
S.F.Gray corr.Kuntze, 1898
Genus
Castracania
G.B. De Toni, 1892 †
Genus
Catillus
N.I. Hendey, 1977
Genus
Cavitatus
D.M. Williams, 1989 †
Genus
Centrodiscus
Pantocsek, 1889
Genus
Centroporus
J. Pantocsek, 1889 †
Genus
Ceratangula
P.A. Sims, 2008 †
Genus
Ceratodiscus
S.H. Meakin, 1938 †
Genus
Ceratophora
Pantocsek, 1889
Genus
Chasea
G D. Hanna, 1934 †
Genus
Cheloniodiscus
J. Pantocsek, 1889 †
Genus
Chuniella
G. Karsten, 1905
Genus
Cladogramma
C.G. Ehrenberg, 1854 †
(1)
Genus
Cladomphalus
J.W.Bailey, 1894
Genus
Clavicula
J. Pantocsek, 1886 †
Genus
Clavularia
R.K. Greville, 1865 †
Genus
Clevamphora
C. Mereschkowsky, 1903
Genus
Cleveia
J. Pantocsek in J. Tempère, 1895
Genus
Clevia
C. Mereschkowsky, 1902
Genus
Climacidium
C.G. Ehrenberg, 1870
Genus
Climacosira
A. Grunow, 1862
Genus
Clipeoparvus
J. Woodbridge, E.J. Cox & N. Roberts in Woodbridge et al., 2010
(1)
Genus
Cocconeiopsis
A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
(2)
Genus
Coenobiodiscus
A.R. Loeblich III, W.W. Wight & W.M. Darley, 1968
Genus
Collumicylindrus
S. Komura, 2005 †
Genus
Cometes
H.Edsbagge, 1966
Genus
Comperiella
K.Sabbe & W.Vyverman, 2001
(1)
Genus
Compositus
V.N. Vekschina, 1960 †
Genus
Concentrodiscus
G.C. Khursevich, A.I. Moisseeva & G.A. Sukhova, 1989
Species
Concentrodiscus abnormis
Khursevich, Moiseeva & Suhkova, 1989
Species
Concentrodiscus proteus
G.K. Khursevich & S.A. Fedenya, 2006
Species
Concentrodiscus subabnormis
G.K. Khursevich & S.A. Fedenya, 2006
Species
Concentrodiscus variabilis
Khursevich & Chernyaeva, 1994
Genus
Confervea
O.F. Müller, 1873
Genus
Corbellia
N.I. Maidana & F.E. Round, 1999
(1)
Genus
Corinna
P.A.C. Heiberg, 1863 †
Genus
Corona
P. Lefebure & E. Chenevière, 1938 †
accepted as
Phycorona
Blanco, 2020 †
Genus
Coronia
C.G. Ehrenberg, 1840
(10)
Genus
Coronodiscus
I. Suto, 2004 †
Genus
Cortinocornus
Z.I. Glezer, 1984 †
Genus
Coscinophaena
C.G. Ehrenberg, 1854
Genus
Coscinorima
N.I. Strelnikova in N.I. Strelnikova & I.V. Makarova, 1999 †
Genus
Cosmiodiscus
R.K. Greville, 1866 †
Genus
Costopyxis
Z.I. Glezer, 1984 †
Genus
Cotyledon
J. Brun, 1891
Genus
Coxia
H. Lange-Bertalot & G. Moser in G. Moser, H. Lange-Bertalot & D. Metze, 1998
accepted as
Eileencoxia
S.Blanco & C.E.Wetzel, 2016
Genus
Craspedopleura
M. Poulin, 1993
Genus
Craspedoporus
R.K. Greville, 1863 †
Genus
Creania
M.P Olney in Olney, Bohaty, Harwood & Scherer, 2009 †
Genus
Cristodiscus
Z.I. Glezer & A.P. Olshtynskaya, 1994 †
Genus
Crossophialus
D.M. Harwood & R. Gersonde, 1990 †
Genus
Crucidenticula
F.Akiba & Y.Yanagisawa, 1986 †
Genus
Crystalia
Sommerfeld in J.B.M. Bory de Saint-Vincent, 1824
Genus
Ctenophora
A. de Brebisson ex F.T. Kützing, 1849
Genus
Cultria
(D. Metzeltin & H. Lange-Bertalot) D. Metzeltin & H. Lange-Bertalot, 2007
Genus
Cultria
D. Metzeltin & H. Lange-Bertalot, 1998
Genus
Cussia
H.-J. Schrader, 1974
Genus
Cycloites
J. Grüss, 1928
Genus
Cycloplea
V.B.A. Trevisan di San Leon, 1848
Genus
Cyclosira
H. Peragallo & M. Peragallo, 1907
Genus
Cyclostephanopsis
L. Loginova, 1993 †
Genus
Cylindropyxis
N.I. Hendey, 1964
Genus
Cymatodiscus
N.I. Hendey, 1958
Genus
Cymatogonia
A. Grunow, 1883
Genus
Cymatotheca
N.I. Hendey, 1958
Genus
Cymbamphora
P.T. Cleve, 1895
Genus
Cymbellopsis
K. Krammer, 1997
Genus
Cymbophora
(F.T. Kützing) A. de Brébisson, 1838
Genus
Cymbosira
F.T. Kützing, 1844
Genus
Cypellachaetes
D.M. Harwood & R. Gersonde, 1990 †
Genus
Dactylacanthis
S. Komura, 1999 †
Genus
Dalai-Lama
C. Mereschkowsky, 1906
(1)
Genus
Dandrelion
P. Lefebure, 1947
Genus
Dasyangea
D.M. Harwood & R. Gersonde, 1990 †
Genus
Debya
J. Rattray, 1888
Genus
Debya
J. Pantocsek, 1886
Genus
Dendrelion
J. Pantocsek, 1928
Genus
Dendrella
J.B.M. Bory de Saint-Vincent, 1822
Genus
Dendrogonia
S. Komura, 2007 †
Genus
Detonia
J. Frenguelli, 1949
accepted as
Neodetonia
S. Blanco, 2011
Genus
Dextradonator
R. Ross & P.A. Sims, 1980 †
Genus
Diatoma
A.P. de Candolle in Lamark & A.P. de Candolle, 1805
Genus
Diatomosira
V.B.A. Trevisan di San Leon, 1848
Genus
Dichomenis
C.G. Ehrenberg, 1862
(1)
Genus
Dichotropiscus
S. Komura, 1995 †
Genus
Dickensoniaforma
R.P. Scherer, 1997 †
Genus
Dickieia
M.J. Berkeley ex F.T. Kützing, 1844
Genus
Dicladia
C.G. Ehrenberg, 1844 †
Genus
Dicladiopsis
G.B. De Toni, 1894
Genus
Dictyolampra
C.G. Ehrenberg, 1847 †
Genus
Dictyopyxis
C.G. Ehrenberg, 1844
Genus
Didymohelix
J.W.Griffith
Genus
Dimeractis
S. Komura, 2001 †
Genus
Dimerosira
H. Peragallo in H. Peragallo & M. Peragallo, 1901
Genus
Diommatetras
S. Komura, 2001 †
Genus
Diomphala
C.G. Ehrenberg, 1842
Genus
Diprora
S.P. Main, 2003
(1)
Genus
Disciferium
A.G. Vologdin, 1962 †
Genus
Discodiscus
Gombos A. M. Jr., 1980 †
Genus
Discoites
J. Grüss, 1928
Genus
Disconeis
P.T. Cleve, 1895
Genus
Discoplea
C.G. Ehrenberg, 1844
Genus
Discosira
L. Rabenhorst, 1853
Genus
Discus
C. Stodder, 1879
Genus
Disiphonia
C.G. Ehrenberg, 1854
Genus
Dispinodiscus
I. Suto, 2004 †
Genus
Distichanthes
C.G. Ehrenberg, 1854
Genus
Doryphora
F.T. Kützing, 1844
Genus
Dossetia
F. Azpeitia, 1911 †
Genus
Drepanotheca
H.-J. Schrader ex Round, Crawford & Mann, 1990 †
Genus
Druridgia
A.S. Donkin, 1861
Genus
Echinaria
F.T. Kützing, 1844
Genus
Echinodiscus
A. Mann, 1925
Genus
Ectodictyon
G.C. Khursevich & G.P. Cherniaeva, 1989 †
Genus
Ehrenbergia
A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
accepted as
Ehrenbergiulva
A. Witkowski, H. Lange-Bertalot & D. Metzeltin in A. Witkowski & H. Lange-Bertalot, 2004
Genus
Ehrenbergiulva
A. Witkowski, H. Lange-Bertalot & D. Metzeltin in A. Witkowski & H. Lange-Bertalot, 2004
Genus
Emersonia
J.W. Bailey, 1842
Genus
Encyonemopsis
accepted as
Encyonopsis
K. Krammer, 1997
Genus
Endosigma
A. de Brébisson in Orbigny, 1848
Genus
Endostauron
Brébisson ex Möller, 1892
Genus
Endostauron
A. Grunow, 1880
Genus
Entogonia
R.K. Greville, 1863
(1)
Genus
Entomogaster
C.G. Ehrenberg, 1871
Genus
Epiphalaina
R.W. Holmes, S. Nagasawa & H. Takano, 1993
Genus
Epithelion
J. Pantocsek, 1905
Genus
Epithema
A. de Brébisson, 1838
Genus
Euceratoneis
A. Grunow in L. Rabenhorst, 1865
Genus
Eumeridion
F.T. Kützing, 1844
Genus
Eunophora
W. Vyverman, K. Sabbe & D.G. Mann in W. Vyverman et al., 1998
Genus
Eunotiopsis
A. Grunow in P.T. Cleve & J.D. Moller, 1879
Genus
Euphyllodium
G. Shadbolt, 1854
Genus
Eupleuria
G.A.W. Arnott, 1858
Genus
Eupodiscus
C.G. Ehrenberg, 1844
Genus
Eupterotrum
S.Komura, 1997 †
Genus
Eupyxidicula
S.Blanco & C.E.Wetzel, 2016
(26)
Genus
Eurossia
P.A. Sims in A.D. Mahood, J.A. Barron & P.A. Sims, 1993 †
Genus
Eustephanias
S. Komura, 1999 †
Genus
Excentron
J. Ralfs in A. Pritchard, 1861
Genus
Falcatella
L. Rabenhorst, 1853
accepted as
Fragilaria
H.C. Lyngbye, 1819
Genus
Fenestrella
R.K. Greville, 1863 †
Genus
Fibula
Wm. Smith, 1859
Genus
Flexibiddulphia
R. Simonsen, 1987 †
Genus
Fogedia
A. Witkowski, H. Lange-Bertalot, D. Metzeltin & G. Bafana, 1997
(4)
Genus
Fontigonium
P.A. Sims & N.I. Hendey, 1996
Genus
Fossilarcus
Blanco, 2020 †
Genus
Fovirhombus
S. Komura, 2005 †
Genus
Fragilariella
N.I. Hendey, 1958
Genus
Fryxelliella
A.K.S.K. Prasad, K.A. Riddle & R.J. Livingston, 1997
(1)
Genus
Furtheca
S.Blanco & C.E.Wetzel, 2016 †
Genus
Fusiformella
S. Komura, 2005 †
Genus
Fusotheca
C. Mereschkowsky, 1878
Genus
Gaillonella
J.B.M. Bory de Saint-Vincent, 1825
accepted as
Melosira
C.A. Agardh, 1824
Genus
Gallionella
accepted as
Gaillionella
Bory de Saint-Vincent, 1826
Genus
Gato
C.S.Lobban & J.N.Navarro, 2013
(1)
Genus
Gemellodiscus
I. Suto, 2004 †
Genus
Giffenia
F.E. Round & P.W. Basson, 1997
(1)
Genus
Girodella
Gaillon ex P.J.F. Turpin, 1827
Genus
Gladiopsis
R. Gersonde & D.M. Harwood, 1990 †
Genus
Gleseria
E.G. Lupikina & L.M. Dolmatova, L.M., 1984 †
Genus
Gloeonema
C.G. Ehrenberg, 1856
Genus
Gloionema
C.A. Agardh, 1812
Genus
Glyphodiscus
R.K. Greville, 1862
Genus
Golovenkinia
N.I. Strelnikova, 1997 †
Genus
Gomphocaloneis
F. Meister, 1932
accepted as
Climaconeis
A. Grunow, 1862
Genus
Gomphogramma
A. Braun in L. Rabenhorst, 1853
Genus
Gomphonella
L. Rabenhorst, 1853
Genus
Gomphonema
C.A. Agardh, 1824
Genus
Goniothecium
C.G. Ehrenberg, 1843 †
Genus
Grammatonema
F.T. Kützing, 1845
(1)
Genus
Grayia
E. Grove & J. Brun in A. Schmidt et al., 1892
Genus
Groentvedia
N.I. Hendey, 1964
Genus
Grovea
A. Schmidt ex Van Heurck, 1896 †
Genus
Grunoviella
H. Van Heurck, 1896
Genus
Grunowia
L. Rabenhorst, 1864
(6)
Genus
Grymaia
J.W. Bailey ex L.W. Bailey, 1861
Genus
Gutwinskiella
G.B. De Toni, 1894
Genus
Gyrocylindrus
N.I. Strelnikova & V.A. Nikolaev, 1995 †
Genus
Gyropandorus
S.Komura, 1997 †
Genus
Gyroptychus
A. Schmidt in A. Schmidt et al., 1890 †
Genus
Halionyx
C.G. Ehrenberg, 1844
Genus
Halonetrum
H. Lohmann, 1919
Genus
Halopetitia
S.Blanco & C.E.Wetzel, 2016
(1)
Genus
Halurina
C. Zimmermann, 1918
Genus
Hamatusia
S.R. Stidolph, 1993
Genus
Handmannia
M. Peragallo in R. Handmann, 1913
(1)
Genus
Hanicella
Lobban & Ashworth, 2014
(1)
Genus
Hantzschiopsidea
J. Grüss, 1928
Genus
Harrisonii
E.M.Nelson
Genus
Haynaldella
J. Pantocsek, 1892
Genus
Haynaldia
J. Pantocsek, 1889
accepted as
Haynaldiopsis
S.Blanco & C.E.Wetzel, 2016 †
Genus
Haynaldiella
J. Pantocsek ex H. Van Heurck, 1896
Genus
Haynaldiopsis
S.Blanco & C.E.Wetzel, 2016 †
(1)
Genus
Heibergia
R.K. Greville, 1865 †
Genus
Heliodiscus
H. Van Heurck Fide G. Karsten in A. Engler & K. Prantl, 1928
Genus
Heliopelta
C.G. Ehrenberg, 1844
Genus
Helisella
A. Jurilj, 1949
Genus
Helissella
Jurilj, 1949
Genus
Helminthopsidella
P.C. Silva, 1970 †
Genus
Helminthopsis
H. Van Heurck, 1896
accepted as
Helminthopsidella
P.C. Silva, 1970 †
Genus
Hemiaulus
Ehrenberg, 1844
accepted as
Eucampia
C.G. Ehrenberg, 1839
Genus
Hemizoster
C.G. Ehrenberg, 1844
Genus
Hendeya
J.A. Long, D.P. Fuge & J. Smith, 1946
Genus
Hendeyscoresbya
S.Blanco & C.E.Wetzel, 2016
(1)
Genus
Henseniella
F. Schütt ex G.B. De Toni, 1894
Genus
Henshawia
A. Mann, 1925
Genus
Hercotheca
C.G. Ehrenberg, 1844 †
Genus
Heribaudia
M. Peragallo in J. Heribaud, 1893 †
Genus
Heromphala
P. Lefebure, 1947
Genus
Heroneis
P. Lefebure, 1947
Genus
Hesslandia
A. Cleve-Euler in A. Cleve-Euler & I. Hessland, 1947
Genus
Heterangion
S. Komura, 2001 †
Genus
Heterocampa
C.G. Ehrenberg, 1870 †
Genus
Heterodictyon
R.K. Greville, 1863 †
Genus
Heteromphala
C.G. Ehrenberg, 1859
Genus
Heteroneis
P.T. Cleve, 1895
Genus
Heterostephania
C.G. Ehrenberg, 1854
(1)
Genus
Himantidium
C.G. Ehrenberg, 1840
(1)
Genus
Himantosoma
V.B.A. Trevisan di San Leon, 1848
Genus
Homalodiscus
A.S. Orsted, 1844
Genus
Hormophora
A. Jurilj, 1957
(1)
Genus
Horodiscus
G D. Hanna, 1927 †
Genus
Horstia
J. Sieminska & B. Kwiecinska, 2002 †
Genus
Humbugodiscus
J. Deby, 1890
Genus
Hustedtia
F. Meister, 1932
Genus
Hustedtiella
R. Simonsen, 1960
Genus
Huttonia
E. Grove & G. Sturt, 1887
Genus
Hyalodictya
C.G. Ehrenberg, 1871
Genus
Hyalodiscopsis
T.F. Kozyrenko & T.V. Lativska, 1992
Genus
Hyalogramma
M.Garcia, 2012
(1)
Genus
Hyalopyxis
I.V. Makarova, 1989 †
Genus
Hyalosira
F.T. Kützing, 1844
(1)
Genus
Hyalotrochus
D.M. Harwood & R. Gersonde, 1990 †
Genus
Hydrolinum
H.F. Link, 1820
Genus
Hydrosirella
F. Hustedt, 1952 †
Genus
Hylobiblium
Wolle, 1894
Genus
Hyperion
Gombos A. M. Jr., 1983 †
Genus
Hystrix
J.B.M. Bory de Saint-Vincent, 1822
Genus
Ikebea
S. Komura, 1975 †
Genus
Imparvalvia
S. Komura, 2007 †
Genus
Incisoria
M. Hajos in M. Hajos & H. Stradner, 1975 †
Genus
Insilella
C.G. Ehrenberg, 1845
Genus
Isodiscus
J. Rattray, 1888
Genus
Isomeria
Chevallier
Genus
Isthmiella
P.T. Cleve, 1873
Genus
Janischia
A. Grunow in H. Van Heurck, 1883
Genus
Jousea
Z.I. Glezer, 1967
Genus
Kannoa
S. Komura, 1980 †
Genus
Katahiraia
S. Komura, 1976 †
Genus
Kentrodiscus
J. Pantocsek, 1889 †
Genus
Kerkis
R. Gersonde & D.M. Harwood, 1990 †
Genus
Kidoa
S. Komura, 1979 †
Genus
Kozhowia
M.S.Kulikowskiy & H.Lange-Bertalot, 2012
(5)
Genus
Kozloviella
A.P. Jousé, 1973 †
Genus
Kreagra
R. Gersonde & D.M. Harwood, 1990 †
Genus
Ktenodiscus
J. Pantocsek, 1889
(25)
Genus
Kuemmerlea
J.A. Krenner, 1926
Genus
Lacustriella
H.Lange-Bertalot, M.S.Kulikovskiy & D.Metzeltin, 2012
(5)
Genus
Lamella
J. Brun, 1894
Genus
Lamprotediscus
J. Pantocsek, 1892 †
Genus
Lancineis
G.W. Andrews, 1990 †
Genus
Lauderiopsis
C.H. Ostenfeld & J. Schmidt, 1902
Genus
Lentiliforma
S. Komura, 2006 †
Genus
Leptoscaphos
H.-J. Schrader, 1969 †
Genus
Leudugeria
J. Tempère ex H. Van Heurck, 1896
(2)
Genus
Libellus
P.T. Cleve, 1873
(1)
Genus
Ligulatium
A.G. Vologdin, 1962 †
Genus
Lingulatium
Genus
Lioneis
C.G. Ehrenberg, 1861
Genus
Liostephania
C.G. Ehrenberg, 1847 †
Genus
Liparogyra
C.G. Ehrenberg, 1848
Genus
Liradiscus
R.K. Greville, 1865 †
Genus
Liriogramma
R.W. Kolbe, 1954
Genus
Lisitzinia
A.P. Jousé, 1978 †
Genus
Lithobotrys
C.G. Ehrenberg, 1844
Genus
Lobarzewskya
V.B.A. Trevisan di San Leon, 1848
Genus
Lobodiscus
Ye.G. Lupikina & G.K. Khursevich, 1991 †
Genus
Lomonycus
S. Komura, 1996 †
Genus
Longinata
M. Hajos in M. Hajos & H. Stradner, 1975 †
Genus
Lophotheca
H.-J. Schrader, 1969 †
Genus
Lunella
P. Snoeijs, 1996
(1)
Genus
Lunulina
J.B.M. Bory de Saint-Vincent, 1822
Genus
Lyngbyea
S.C. Sommerfelt, 1826
Genus
Lysicyclia
C.G. Ehrenberg, 1856
Genus
Lysigonium
H.F. Link, 1820
Genus
Macrora
G D. Hanna, 1932 †
Genus
Maluina
R. Ross & P.A. Sims, 1987 †
Genus
Mammidion
J.A. Long, D.P. Fuge & J. Smith, 1946 †
Genus
Mammula
G. Karsten in A. Engler & K. Prantl, 1928
Genus
Margaritoxon
C. Janisch, 1862
Genus
Margaritum
H. Moreira Filho, 1968
(1)
Genus
Mastodiscus
J.W. Bailey, 1854
Genus
Mediaria
V.S. Scheschukova-Poretzkaja, 1962 †
Genus
Melchersiela
C. Teixeira, 1959
Genus
Melotomus
Corda
Genus
Meretrosulus
G D. Hanna, 1927 †
Genus
Meristosolen
D.M. Harwood & R. Gersonde, 1990 †
Genus
Mesasterias
C.G. Ehrenberg, 1872
Genus
Mesodictyopsis
Khursevich, Iwashita, Kociolek & Fedenya in Khursevich et al., 2004 †
Genus
Micrampulla
G D. Hanna, 1927 †
Genus
Microneis
P.T. Cleve, 1895
Genus
Microorbis
R. Gersonde & D.M. Harwood, 1990 †
Genus
Microsolenia
H. Takano, 1998
Genus
Microspodiscus
A. Grunow in H. Van Heurck, 1883
Genus
Microstigma
(P.T. Cleve) F. Meister, 1919
Genus
Microtheca
C.G. Ehrenberg, 1838
(1)
Genus
Miosira
K. Krammer, H. Lange-Bertalot & W. Schiller, 1997 †
accepted as
Alveolophora
A.I. Moisseeva & T.L. Nevretdinova, 1990 †
Genus
Mitralifer
A.G. Vologdin, 1962 †
Genus
Moelleria
P.T. Cleve, 1873
Genus
Moisseevia
N.I. Strelnikova, 1997 †
Genus
Monema
R.K. Greville, 1827
Genus
Monema
M.J. Berkeley, 1833
Genus
Monile
R. Ross & P.A. Sims, 1987 †
Genus
Monobrachia
H.-J. Schrader in H.-J. Schrader & J. Fenner, 1976 †
Genus
Monocis
P. Lefebure, 1947
Genus
Monocladia
I. Suto, 2003 †
Genus
Monogramma
C.G. Ehrenberg, 1843
Genus
Monopsia
E. Grove & G. Sturt, 1887 †
Genus
Muelleriopsis
N.I. Hendey, 1972 †
Genus
Nanofrustulum
F.E. Round, H. Hallsteinsen & E. Paasche, 1999
(6)
Genus
Nanoneis
R.E. Norris, 1973
Genus
Naunema
C.G. Ehrenberg, 1838
Genus
Naviculonema
C.L.Graeff, J.P.Kociolek & S.R.Rushforth, 2013
(1)
Genus
Neidiomorpha
H. Lange-Bertalot & M. Cantonati in M. Cantonati, H. Lange-Bertlaot & N. Angeli, 2010
(5)
Genus
Nematoplata
J.B.M. Bory de Saint-Vincent, 1822
Genus
Neobrunia
O. Kuntze, 1894 †
Genus
Neodetonia
S. Blanco, 2011
Genus
Neodiatoma
A. Kanitz, 1887
Genus
Neograya
O. Kuntze, 1898
Genus
Neomoelleria
S.Blanco & C.E.Wetzel, 2016
(2)
Genus
Nephrodiscus
S. Komura, 1996 †
Genus
Nephroneis
M.C. Amspoker, 1989
Genus
Ninastrelnikovia
H.Lange-Bertalot & A.Fuhrmann, 2014
(3)
Genus
Nitzschiopsidea
J. Grüss, 1928
Genus
Noszkya
P. Lefebure & E. Cheneviere, 1939 †
Genus
Nothoceratium
G.B. De Toni, 1894
Genus
Novilla
P.A.C. Heiberg, 1863
Genus
Ocularia
E.J. Quekett, 1844
Genus
Odontodiscus
C.G. Ehrenberg, 1845 †
Genus
Odontotropis
A. Grunow, 1884 †
Genus
Omphalopelta
C.G. Ehrenberg, 1844
Genus
Omphalophortron
S. Komura, 2005 †
Genus
Omphalopsis
R.K. Greville, 1863
Genus
Omphalotheca
C.G. Ehrenberg, 1854
Genus
Oncodiscus
J.W.Bailey
Genus
Oncosphenia
C.G. Ehrenberg, 1845
Genus
Opephoropsis
J. Frenguelli, 1945
Genus
Orthosira
W. Smith, 1855
accepted as
Orthoseira
G.H.K. Thwaites, 1848
(1)
Genus
Orthotropis
P.T. Cleve, 1891
Genus
Oshitea
S. Komura, 1993 †
Genus
Palaeotrigonium
A.G. Vologdin, 1962 †
Genus
Paleohorstia
S.Blanco & C.E.Wetzel, 2016
Genus
Paleopandorus
S. Komura, 1996 †
Genus
Paltonophora
F.T. Kützing, 1833
Genus
Pantocsekia
A. Grunow ex J. Pantocsek, 1886 †
Genus
Pappia
M. Hajos in M. Hajos & Z. Rehakova, 1974
Genus
Paradesmus
A.C.J. Corda, 1835
Genus
Paraszechenyia
S.Blanco & C.E.Wetzel, 2016
(4)
Genus
Parelion
Schmidt, 1888
Genus
Parodontella
S. Komura, 1999 †
Genus
Pentapodiscus
C.G. Ehrenberg, 1843
Genus
Peponia
R.K. Greville, 1863 †
Genus
Peragalla
F. Schütt, 1895
Genus
Peragallia
F. Schütt, 1895
Genus
Peragalloella
H. Van Heurck, 1909
Genus
Periptera
C.G. Ehrenberg, 1844
Genus
Peristephania
C.G. Ehrenberg, 1854
Genus
Perithyra
C.G. Ehrenberg ex H. Van Heurck, 1896
Genus
Perizonium
F. Cohn & C. Janisch ex L. Rabenhorst, 1864
Genus
Peroniopsis
F. Hustedt, 1952
Genus
Petitia
M. Peragallo in J. Tempère & H. Peragallo, 1909
accepted as
Halopetitia
S.Blanco & C.E.Wetzel, 2016
Genus
Phacodiscus
A. Meunier, 1910
Genus
Phaeothallus
K.I.Meyer
Genus
Phalarina
Ehrenberg
Genus
Pharyngoglossa
Corda, 1835
Genus
Phialediscus
L. Vailionis, 1930
Genus
Phlyctaenia
F.T. Kützing, 1849
Genus
Phycorona
Blanco, 2020 †
Genus
Pinnulariosigma
T.V. Desikachary, V.N. Raja Rao & V.T. Sridharan in T.V. Desikachary, 1989
Genus
Playaensis
S.A. Spaulding & J.P. Kociolek in S.A. Spaulding, J.P. Kociolek & Davis, D.R., 2002
Genus
Plegmolobos
S. Komura, 2005 †
Genus
Pleurodesmium
F.T. Kützing, 1846
Genus
Pleurodiscina
P.C. Silva, 1970
Genus
Pleurodiscus
J.W. Barker & S.H. Meakin, 1944
Genus
Pleuroneis
P.T. Cleve, 1895
Genus
Pleurosiphonia
C.G. Ehrenberg, 1871
Genus
Pleurostaurum
L. Rabenhorst, 1859
(2)
Genus
Plicatodiscus
Z.I. Glezer, 1988
Genus
Ploiaria
J. Pantocsek ex Van Heurck, 1896 †
Genus
Plumosigma
T. Nemoto, 1956
Genus
Plurifenestra
S. Komura, 1996 †
Genus
Podiscus
J.W. Bailey, 1844
Genus
Pododiscus
F.T. Kützing, 1844
Genus
Podosphenia
Ehrenberg, 1836
Genus
Pogoneis
F.E. Round & P.W. Basson, 1997
Genus
Poloniasira
I. Kaczmarska & J.M. Ehrman, 2008 †
Genus
Polyceratium
A.F. Castracane, 1886
Genus
Polygonalium
A.G. Vologdin, 1962 †
Genus
Polymyscos
C. Janisch, 1888
Genus
Pomphodiscus
J.W. Barker & S.H. Meakin, 1947 †
Genus
Ponticella
C.G. Ehrenberg, 1873
Genus
Pontodiscus
D.N.Temniskova-Topalova & V.S.Sheshukova-Poretzkaya, 1981 †
Genus
Poretzkia
A.P. Jousé, 1949 †
Genus
Porocyclia
C.G. Ehrenberg, 1848
Genus
Porodiscus
R.K. Greville, 1863 †
Genus
Porostauros
F. Habirshaw, 1877
Genus
Porosularia
B.V. Skvortzov, 1976
Genus
Porotheca
J. Fenner, 1994
accepted as
Furtheca
S.Blanco & C.E.Wetzel, 2016 †
Genus
Potamodiscus
J. Gerloff, 1968
Genus
Praecymatosira
N.I. Strelnikova in Dzinoridze, Jousé & Stelnikova, 1979
Genus
Praeepithemia
A.P. Jousé, 1952
Genus
Praethalassiosiropsis
R. Gersonde & D.M. Harwood, 1990 †
Genus
Pravifusus
A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
(1)
Genus
Pritchardia
L. Rabenhorst, 1864
Genus
Proboscidea
T.B.B. Paddock & P.A. Sims, 1980
Genus
Proboscineis
F. Butzin, 1980
Genus
Prorostaurus
C.G. Ehrenberg, 1843
Genus
Protonema
Meneghinini, 1845
Genus
Protorhaphoneis
B. Kwiecinska & J. Sieminska, 2000
Genus
Psammoparalia
Genus
Pseudauliscus
G. Leuduger-Fortmorel, 1879
Genus
Pseudoamphiprora
(P.T. Cleve) P.T. Cleve, 1894 †
Genus
Pseudoaulacodiscus
V.N. Vekschina, 1961 †
Genus
Pseudocerataulus
J. Pantocsek, 1889
Genus
Pseudocoscinodiscus
A. Grunow in H. Van Heurck, 1883
Genus
Pseudodictyoneis
P.T. Cleve ex J. Pantocsek, 1892
Genus
Pseudodimerogramma
H.-J. Schrader in H.-J. Schrader & J. Fenner, 1976 †
Genus
Pseudodiploneis
A. Schmidt, 1874
Genus
Pseudohyalodiscus
T.F. Kozyrenko & I.V. Makarova, 1997
Genus
Pseudomastogloia
J. Pantocsek, 1905
Genus
Pseudo-pleurosigma
P.T. Cleve & A. Grunow, 1880
Genus
Pseudopyxilla
A. Forti, 1909 †
Genus
Pseudostaurosiropsis
E.A. Morales, 2001
(1)
Genus
Pseudostephanodiscus
A. Grunow, 1884
Genus
Pseudosynedra
J. Pantocsek ex G. Moesz, 1904
Genus
Pseudosynedra
G. Leuduger-Fortmorel ex C.S. Boyer, 1827
Genus
Pseudotribrachia
S.Blanco & C.E.Wetzel, 2016
(1)
Genus
Psygmatella
F.T. Kützing, 1834
Genus
Pterotheca
A. Grunow ex Forti, 1909 †
Genus
Ptychodiscus
E. O'Meara, 1867
(1)
Genus
Pyrgodiscus
F. Kitton ex P.T. Cleve, 1885 †
Genus
Pyxidicula
N.I. Strelnikova & V.A. Nikolaev, 1986
accepted as
Eupyxidicula
S.Blanco & C.E.Wetzel, 2016
Genus
Quadrodiscus
P. Prema & T.V. Desikachary, 1989
Genus
Radialiplicata
(Z.I. Glezer) Z.I. Glezer, 1992 †
Genus
Radiodiscus
A. Forti & P. Schulz, 1932
Genus
Radiodiscus
(W.M. Bale) Mills, 1932
Genus
Radiopalma
J. Brun, 1891 †
Genus
Ralfsia
E. O'Meara, 1875
Genus
Rancia
L. Mangin ex J. Chavaillon, 1939
Genus
Raphidogloea
Genus
Rattrayella
G.B. De Toni, 1889 †
Genus
Reicheltia
H. Van Heurck, 1896
Genus
Rexlowea
J.P. Kociolek & E.W. Thomas, 2010
(2)
Genus
Rhabdium
C.F.W. Wallroth, 1833
Genus
Rhabdosira
C.G. Ehrenberg, 1870
Genus
Rhaphidogloea
F.T. Kützing, 1844
Genus
Rhaphidophora
J.A. Long, D.P. Fuge & J. Smith, 1946
accepted as
Rhaphidophoropsis
S.Blanco & C.E.Wetzel, 2016
Genus
Rhaphidophoropsis
S.Blanco & C.E.Wetzel, 2016
(1)
Genus
Rhaphiophorasphaera
B.L. Clark & A.S. Campbell, 1945 †
Genus
Rhaphococcus
C.G. Ehrenberg, 1871
Genus
Rhipidophora
F.T. Kützing, 1844
(1)
Genus
Rhizonotia
C.G. Ehrenberg, 1843
Genus
Rhynchopyxis
R. Gersonde & D.M. Harwood, 1990 †
Genus
Rimaria
F.T. Kutzing, 1844
Genus
Robinsetta
G D. Hanna & A.L. Brigger, 1964 †
Genus
Rosaria
Carmichael in W.J. Hooker, 1833
Genus
Rossiella
T.V. Desikachary & C.L. Maheshwari, 1958 †
Genus
Rouxiopsis
S. Komura, 1996 †
Genus
Rutilariopsis
H. Van Heurck, 1896 †
Genus
Saeptifera
R.M.Gogorev, 2014
Genus
Sagittula
S. Komura, 1997
Genus
Salacia
J. Pantocsek, 1889
Genus
Salpa
P. Lefebure, 1947
Genus
Sameioneis
D.J. Russell & R.E. Norris, 1971
(1)
Genus
Sawamuraia
S. Komura, 1976 †
Genus
Scalariella
C.Riaux-Gobin, 2012
(2)
Genus
Scalptrum
A.C.J. Corda, 1835
Genus
Scapha
Edwards ex C. Johnston, 1860
Genus
Scaphularia
F.T. Kützing, 1844
Genus
Sceptronema
H. Takano, 1983
Genus
Schimittia
P. Lefebure, 1947
Genus
Schimperiella
G. Karsten, 1905
Genus
Schizonema
C.A. Agardh, 1824
(5)
Genus
Schizostauron
A. Grunow, 1867
Genus
Schmidtia
C. Janisch, 1888
Genus
Schmidtiella
C.H. Ostenfeld, 1903
Genus
Schuettia
G.B. De Toni, 1894
Genus
Schumanniana
P. Lefebure, 1947
Genus
Scoliodiscus
A. Jurilj, 1954
Genus
Scoresbya
N.I. Hendey, 1937
accepted as
Hendeyscoresbya
S.Blanco & C.E.Wetzel, 2016
Genus
Scytellum
C.Agardh, 1827
Genus
Secallia
F. Azpeitia, 1911
Genus
Sellaphoropsis
D. Metzeltin & H. Lange-Bertalot, 2002
Genus
Sembeya
P. Lefebure, 1947
Genus
Semseyia
J. Pantocsek, 1902
Genus
Sextiputeus
R. Ross & P.A. Sims, 2000 †
Genus
Sieminskia
D. Metzeltin & H. Lange-Bertalot, 1998
Genus
Sigma
M. Peragallo in J. Heribaud et al., 1920
Genus
Sigmatella
F.T. Kützing, 1833
accepted as
Nitzschia
A.H. Hassall, 1845
Genus
Simonseniella
J. Fenner, 1991 †
Genus
Siphonodiscus
S. Komura, 1996 †
Genus
Skvortzowia
M.S.Kulikovskiy, H.Lange-Bertalot & D.Metzeltin, 2012
(2)
Genus
Smithiella
H. Peragallo in H. Peragallo & M. Peragallo, 1901
Genus
Solium
P.A.C. Heiberg, 1863 †
Genus
Spermatogonia
G.Leuduger-Fortmorel, 1892
Genus
Sphaerophora
(A.H. Hassall) J. Lindley, 1846
Genus
Sphaerotermia
C.G. Ehrenberg, 1852
Genus
Sphenoneis
V.B.A. Trevisan di San Leon, 1848
Genus
Sphenophora
F.T. Kützing, 1833
Genus
Sphenophora
(Kützing) L. Agassiz, 1843
Genus
Sphenosira
C.G. Ehrenberg, 1843
Genus
Sphinctocystis
A.H. Hassall, 1845
Genus
Spinivinculum
R. Ross, 1990
Genus
Spinodiscus
T.V. Desikachary & K.A. Ranjitha Devi in T.V. Desikachary, 1986 †
Genus
Spinosira
T.F. Kozyrenko & I.V. Makarova, 1997 †
Genus
Spirodiscina
S.Blanco & C.E.Wetzel, 2016
(3)
Genus
Spirodiscus
A. Jurilj, 1949
accepted as
Spirodiscina
S.Blanco & C.E.Wetzel, 2016
Genus
Staurogramma
L. Rabenhorst, 1853
Genus
Stauronella
C. Mereschkowsky, 1901
Genus
Staurosigma
A. Grunow ex Rabenhorst, 1864
Genus
Stelladiscus
J. Rattray, 1890
Genus
Stelodiscus
S. Komura, 2001 †
Genus
Stenopterotia
F. Habirshaw, 1878
Genus
Stephanogonia
C.G. Ehrenberg, 1844 †
Genus
Stephanonycites
S. Komura, 1999 †
Genus
Stephanosira
C.G. Ehrenberg, 1848
Genus
Stichochrysis
Pringsheim, 1955
Genus
Stichostaura
C.G. Ehrenberg, 1853
Genus
Stictodesmis
R.K. Greville, 1863
Genus
Stictodiscella
G.B. De Toni, 1894
Genus
Stictolecanon
S. Komura, 1999 †
Genus
Stictoneis
F.T. Kützing, 1844
Genus
Stigmaphora
G.C. Wallich, 1860
Genus
Stoschiella
C.Gardner & K.Wenderoth, 1966
Genus
Streptommion
S.Komura, 1997 †
Genus
Striatocellina
Z.I. Glezer, 1988
Genus
Strombus
F. Schütt ex A.F. Castracane, 1892
Genus
Sturtgrovea
O. Kuntze, 1898
Genus
Sturtiella
R. Simonsen & H.-J. Schrader, 1974 †
Genus
Stylaria
Hooker
Genus
Stylobiblium
C.G. Ehrenberg, 1845 †
Genus
Styloneis
C.G. Ehrenberg, 1844
Genus
Stylorium
S. Komura, 1999 †
Genus
Suriraya
E. Pfitzer, 1871
Genus
Symblepharis
C.G. Ehrenberg, 1873
Genus
Symbolophora
C.G. Ehrenberg, 1844
Genus
Syncyclia
C.G. Ehrenberg, 1837
Genus
Syrinx
A.C.J. Corda, 1835
Genus
Systephania
C.G. Ehrenberg, 1844 †
Genus
Szechenyia
J. Pantocsek, 1903
Genus
Tabulina
J. Brun in J. Brun & J. Tempère, 1889 †
Genus
Temperea
M. Peragallo in J. Tempère & H. Peragallo, 1908
Genus
Temperella
F.W. Mills, 1935 †
Genus
Tessela
accepted as
Tessella
G.Playfair, 1915
Genus
Tessella
C.G. Ehrenberg, 1837
Genus
Tetrachaeta
C.G. Ehrenberg, 1844
Genus
Tetralophus
S. Komura, 2007 †
Genus
Tetramphora
C. Mereschkowsky, 1903
(9)
Genus
Tetrapodiscus
C.G. Ehrenberg, 1843
Genus
Thamnodiscus
S. Komura, 1999 †
Genus
Thaumaleorhabdium
V.B.A. Trevisan di San Leon, 1848
Genus
Thaumatonema
R.K. Greville, 1863 †
Genus
Thumia
P.T. Cleve ex F.B. Taylor, 1929
Genus
Tibiella
C.E. Bessey, 1900
Genus
Tortilaria
W.J. Barker & S.H. Meakin, 1948
Genus
Toxosira
A. de Brébisson ex M. Peragallo, 1903
Genus
Triaulacias
C.G. Ehrenberg, 1844
Genus
Tribrachia
A. Mann, 1925
Genus
Triceras
Lobarzewski
Genus
Trifonovia
M.S.Kulikovskiy & H.Lange-Bertalot, 2012
(1)
Genus
Tripterion
R.W. Holmes, S. Nagasawa & H. Takano, 1993
Genus
Trisystema
S. Komura, 2005 †
Genus
Trochosira
F. Kitton, 1871 †
Genus
Trochosirella
S. Komura, 1996 †
Genus
Trochosiropsis
Z.I. Glezer, 1984
Genus
Trochus
R. Gersonde & D.M. Harwood, 1990 †
Genus
Tropidosiphonus
S. Komura, 1994
Genus
Truania
J. Pantocsek, 1886 †
Genus
Tryblioptychus
N.I. Hendey, 1958
Genus
Tschestnovia
J. Pantocsek, 1889
(1)
Genus
Tubaformis
Gombos A. M. Jr., 1983 †
Genus
Tubularia
J. Brun, 1894
Genus
Tubulariella
P.C. Silva, 1970 †
Genus
Tumulopsis
N.I. Hendey, 1982 †
Genus
Tursiocola
R.W. Holmes, S. Nagasawa & H. Takano, 1993
(7)
Genus
Undatodiscus
E.G. Lupikina, 1984 †
Genus
Unguiella
S. Komura, 1996 †
Genus
Upothema
J.A. Long, D.P. Fuge & J. Smith, 1946 †
Genus
Valdiviella
A.F.W. Schimper in G. Karsten, 1907
Genus
Vanheurckella
J. Pantocsek, 1892 †
Genus
Vanhoeffenus
H. Heiden & R.W. Kolbe, 1928
Genus
Vavia
A. Missuna, 1914
Genus
Veniaminia
N.I. Strelnikova, 1997 †
Genus
Vernadskowia
A. Missuna, 1914
Genus
Vesiculifera
A.H. Hassall, 1845
Genus
Vikingea
A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
(1)
Genus
Vulcanella
P.A.Sims & A.D.Mahood, 1998 †
Genus
Weissflogia
C. Janisch, 1888
Genus
Willemoesia
F. Castracane, 1886
Genus
Williamsella
C.L.Graeff, J.P.Kociolek & S.R.Rushforth, 2013
(2)
Genus
Wittia
J. Pantocsek, 1889 †
Genus
Wrightia
E. O'Meara, 1867
Genus
Xanthioisthmus
I.Suto, 2006 †
Genus
Xanthiopsis
F. Wolle, 1890
Genus
Xanthiopyxis
(C.G. Ehrenberg) C.G. Ehrenberg, 1845 †
Genus
Xystotheca
G D. Hanna, 1932 †
Genus
Zotheca
J. Pantocsek, 1902
Subclass
Bacillariophycidae
(4 408)
Subclass
Coscinodiscophycidae
(877)
Subclass
Fragilariophycidae
(483)
Order
Centrales
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