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Name Nomenclatural Novelty
Achnanthes inflata var. sigmata
    Achnanthes inflata var. sigmata Otto Müller 1909
Name Nomenclatural Novelty
Achnanthosigma mereschowskii
    Achnanthosigma mereschowskii Reinhardt 1882
Name Nomenclatural Novelty
Amphitropis pleurosigma
    Amphitropis pleurosigma Reinhard 1885
Name Nomenclatural Novelty
Amphora pleurosigma
    Amphora pleurosigma Tempère & Brun in Brun & Tempère 1889
Name Nomenclatural Novelty
Campylosira japonica var. leptosigma
    Campylosira japonica var. leptosigma Cleve & Grove 1891
Name Nomenclatural Novelty
Cocconeis dirupta var. sigma
    Cocconeis dirupta var. sigma (Pantocsek) Cleve 1895
Name Nomenclatural Novelty
Cocconeis dirupta var. sigmatissima
    Cocconeis dirupta var. sigmatissima Mereschkowsky 1902
Name Nomenclatural Novelty
Cocconeis sigma
    Cocconeis sigma Pantocsek 1886
Name Nomenclatural Novelty
Cocconeis sigma var. sparsipunctata
    Cocconeis sigma var. sparsipunctata Tempère & Brun in Brun & Tempère 1889
Name Nomenclatural Novelty
Cocconeis sigmacrux
    Cocconeis sigmacrux Mereschkowsky 1902
Name Nomenclatural Novelty
Endosigma eximium
    Endosigma eximium (Thwaites) Juhlin-Dannfelt 1882
Name Nomenclatural Novelty
Endosigma eximium
    Endosigma eximium Bréb isson
Name Nomenclatural Novelty
Eucocconeis dirupta var. sigma
    Eucocconeis dirupta var. sigma (Pantocsek) Cleve 1895
Name Nomenclatural Novelty
Gomphoneis tetrasigmata
    Gomphoneis tetrasigmata (Horikawa & Okuno) T. Ohtsuka 2002
Name Nomenclatural Novelty
Gomphonema sigma
    Gomphonema sigma Ehrenberg 1854
Name Nomenclatural Novelty
Gomphonema tetrasigmata
    Gomphonema tetrasigmata Horikawa & Okuno in Okuno 1944
Name Nomenclatural Novelty
Gyrosigma acuminatum
    Gyrosigma acuminatum (Kützing) Rabenhorst 1853
Name Nomenclatural Novelty
Gyrosigma acuminatum var. angustatum new variety
    Gyrosigma acuminatum var. angulatum Hagelstein 1939     
Name Nomenclatural Novelty
Gyrosigma acuminatum var. baikalensis new variety
    Gyrosigma acuminatum var. baikalensis Skvortzow 1937          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma acuminatum var. brebissonii
    Gyrosigma acuminatum var. brebissonii (Grunow in Cleve & Grunow) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma acuminatum var. curta
    Gyrosigma acuminatum var. curta (Grunow) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma acuminatum var. curta
    Gyrosigma acuminatum var. curta Grunow in Cleve & Grunow 1880
Name Nomenclatural Novelty
Gyrosigma acuminatum var. gallica
    Gyrosigma acuminatum var. gallica (Grunow in Van Heurck) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma acuminatum var. lacustre new combination
    Gyrosigma acuminatum var. lacustre (W. Sm.) Cl.-Eul. 1952          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma acuminatum var. lacustre
    Gyrosigma acuminatum var. lacustre (W. Smith) Meister 1912
Name Nomenclatural Novelty
Gyrosigma acuminatum var. neglectum new variety
    Gyrosigma acuminatum var. neglectum McCall 1933          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma acuminatum var. okamurae new combination
    Gyrosigma acuminatum var. okamurae (Skv.) Skv. & Noda 1971          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma acuminatum var. spenceri
    Gyrosigma acuminatum var. spenceri Kirejeva 1929
Name Nomenclatural Novelty
Gyrosigma aestuarii
    Gyrosigma aestuarii (Brebisson in Kutzing) Griffith & Henfrey 1856
Name Nomenclatural Novelty
Gyrosigma aestuarium
    Gyrosigma aestuarium Kisselev 1925
Name Nomenclatural Novelty
Gyrosigma agellus
    Gyrosigma agellus (Ehrenberg) Rabenhorst 1853
Name Nomenclatural Novelty
Gyrosigma algoris new species
    Gyrosigma algoris Carter & Bailey-Watts 1980          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma angulatum
    Gyrosigma angulatum Griffith & Henfrey 1856
Name Nomenclatural Novelty
Gyrosigma angulatum var. beta
    Gyrosigma angulatum var. beta Griffith & Henfrey 1856
Name Nomenclatural Novelty
Gyrosigma angulatum var. gamma
    Gyrosigma angulatum var. gamma Griffith & Henfrey 1856
Name Nomenclatural Novelty
Gyrosigma angustum
    Gyrosigma angustum (Donkin) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma angustum var. subflexuosa
    Gyrosigma angustum var. subflexuosa (Grunow ex Cleve) F.W. Mills 1934
Name Nomenclatural Novelty
Gyrosigma angustum var. sumatrana
    Gyrosigma angustum var. sumatrana Cleve 1894
Name Nomenclatural Novelty
Gyrosigma apula
    Gyrosigma apula Rabenhorst 1853
Name Nomenclatural Novelty
Gyrosigma arcticum
    Gyrosigma arcticum (Cleve) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma arcticum var. irregularis
    Gyrosigma arcticum var. irregularis (H. Peragallo) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma arcticum var. subflexuosa
    Gyrosigma arcticum var. subflexuosa (Grunow ex Cleve) F.W. Mills 1934
Name Nomenclatural Novelty
Gyrosigma arcutum new combination
    Gyrosigma arcuatum (Donkin) Sterrenburg in Jahn, Sterrenburg and Kusber 2005          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuata
    Gyrosigma attenuata (Kützing) Rabenhorst 1853
Name Nomenclatural Novelty
Gyrosigma attenuatum
    Gyrosigma attenuatum (Kützing) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma attenuatum f. hippocampus new combination
    Gyrosigma attenuatum f. hippocampus (W. Sm.) Brockmann 1950          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum f. intermedia new form
    Gyrosigma attenuatum f. intermedia Petkoff 1943          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum f. subbalticum
    Gyrosigma attenuatum f. subbalticum Carlson 1913
Name Nomenclatural Novelty
Gyrosigma attenuatum f. typica
    Gyrosigma attenuatum f. typica Rabenhorst 1858
Name Nomenclatural Novelty
Gyrosigma attenuatum var. antarcticum new variety
    Gyrosigma attenuatum var. antarctica Freng. et Orl. 1958          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum var. asiatica new variety
    Gyrosigma attenuatum var. asiatica Skvortzov 1938          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum var. baicalensis
    Gyrosigma attenuatum var. baicalensis Skvortzow et Meyer 1928
Name Nomenclatural Novelty
Gyrosigma attenuatum var. gigas new variety
    Gyrosigma attenuatum var. gigas McCall 1933          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum var. hippocampus
    Gyrosigma attenuatum var. hippocampus (Ehrenberg; W. Smith) Schulz 1926
Name Nomenclatural Novelty
Gyrosigma attenuatum var. hippocampus new combination
    Gyrosigma attenuatum var. hippocampus (W. Sm.) Cl.-Eul. 1952          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum var. nipponica new variety
    Gyrosigma attenuatum var. nipponica Skvortzow 1936          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma attenuatum var. scalprum
    Gyrosigma attenuatum var. scalprum (Gaillon in Turpin) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma attenuatum var. typicum new name
    Gyrosigma attenuatum var. typicum Cl.-Eul. 1952          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma baicalense f. minus
    Gyrosigma baicalense f. minus Komarenko 1957
Name Nomenclatural Novelty
Gyrosigma baicalense f. minus new form
    Gyrosigma baicalense f. minus Komarenko in Komarenko & Vasilyeva 1975          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma baikalensis new species
    Gyrosigma baikalensis Skvortzow 1937          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma baileyi
    Gyrosigma baileyi (Grunow in Cleve & Grunow) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma baltica neotype, isoneotype
    Gyrosigma balticum (Ehr.) Rabenhorst sensu stricto Sterrenburg 1995          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum f. maeoticum new combination
    Gyrosigma balticum f. maeoticum (Pant.) Pr.-Lavr. 1963          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. atlanticum
    Gyrosigma balticum var. atlanticum W. West 1912
Name Nomenclatural Novelty
Gyrosigma balticum var. beta
    Gyrosigma balticum var. beta Griffith & Henfrey 1856
Name Nomenclatural Novelty
Gyrosigma balticum var. brevius new variety
    Gyrosigma balticum var. brevius Chin et Liu 1979          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. californica
    Gyrosigma balticum var. californica (Grunow in Cleve & Möller) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma balticum var. diminutum new combination
    Gyrosigma balticum var. diminutum (Grunow) Cardinal, Poulin & Berard-Therriault 1986          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. incurva new variety
    Gyrosigma balticum var. incurva Meister 1932          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. lorenzii new combination
    Gyrosigma balticum var. lorenzii (Grun.) Freng. et Orl. 1958          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. maeoticum
    Gyrosigma balticum var. maeoticum (Pantocsek) Proschkina-Lavrenko 1950
Name Nomenclatural Novelty
Gyrosigma balticum var. maximum new combination
    Gyrosigma balticum var. maximum (Grun.) Woodhead et Tweed 1958          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. similis
    Gyrosigma balticum var. similis (Grunow in Cleve & Grunow) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma balticum var. sinensis
    Gyrosigma balticum var. sinensis (Ehrenberg) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma balticum var. sinicum new variety
    Gyrosigma balticum var. sinicum Chin et Liu 1979          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. sulcata
    Gyrosigma balticum var. sulcata Mereschkowsky 1902
Name Nomenclatural Novelty
Gyrosigma balticum var. turgidum new variety
    Gyrosigma balticum var. turgidum Stidolph 1980          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. turgidum new variety
    Gyrosigma balticum var. turgidum Stidolph 1981          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma balticum var. wandsbeckii
    Gyrosigma balticum var. wandsbeckii (Donkin) Heiden in Heiden & Kolbe 1928
Name Nomenclatural Novelty
Gyrosigma beaufortianum new species, lectotype, paralectotype
    Gyrosigma beaufortianum Hustedt 1955          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma bennettii
    Gyrosigma bennettii (M. Peragallo in Tempère & Peragallo) Boyer 1927
Name Nomenclatural Novelty
Gyrosigma bhusavalensis new species
    Gyrosigma bhusavalensis Sarode & Kamat 1984          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma bigibbum new species
    Gyrosigma bigibbum Zanon 1949          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma caffra new species
    Gyrosigma caffra Giffen 1963          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma calaritanum new species
    Gyrosigma calaritanum Zanon 1948          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma cali new species
    Gyrosigma cali Reid 2003          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma californicum new status
    Gyrosigma californicum (Grunow) Reid 2003          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma centropunctatum vcard
    Gyrosigma centropunctatum Yuhang Li, Nagumo & Kuidong Xu 2020     
Name Nomenclatural Novelty
Gyrosigma closterioides
    Gyrosigma closterioides (Grunow) Reid
Name Nomenclatural Novelty
Gyrosigma closterioides new status
    Gyrosigma closterioides (Grunow) Reid 2004          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma compactum
    Gyrosigma compactum (Greville) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma compactum var. constricta
    Gyrosigma compactum var. constricta (Grunow) Cleve 1894
Name Nomenclatural Novelty
Gyrosigma concilians new combination
    Gyrosigma concilians (Cl.) Okolodkov 1989          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma concilians var. constricta new variety
    Gyrosigma concilians var. constricta Okolodkov 1989          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma constrictum
    Gyrosigma constrictum Volkov 1936
Name Nomenclatural Novelty
Gyrosigma contortum
    Gyrosigma contortum Mereschkowsky 1902
Name Nomenclatural Novelty
Gyrosigma contortum var. tenuissimum
    Gyrosigma contortum var. tenuissimum Mereschkowsky 1902
Name Nomenclatural Novelty
Gyrosigma crassum new species
    Gyrosigma crassum Meister 1935          [Link to DiatomBase]
Name Nomenclatural Novelty
Gyrosigma curvulum
    Gyrosigma curvulum (Van Heurck) W. West
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