• Gyrosigma A.H. Hassall, 1845
• Gyrosigma acuminatum (Kützing) Rabenhorst, 1853
• Gyrosigma acuminatum var. acuminatum (Kützing) Rabenhorst, 1853 accepted as Frustulia acuminata Kützing, 1833
• Gyrosigma acuminatum var. angulatum Hagelstein, 1939
• Gyrosigma acuminatum var. baikalensis Skvortzov, 1937 (uncertain > unassessed)
• Gyrosigma acuminatum var. brebissonii (Grunow) Cleve, 1894 accepted as Pleurosigma brebissonii f. brebissonii Grunow in Cleve & Grunow, 1880
• Gyrosigma acuminatum var. curta Grunow in Cleve & Grunow, 1880 accepted as Pleurosigma acuminatum var. curta Grunow in Cleve & Grunow, 1880
• Gyrosigma acuminatum var. gallica (Grunow) Cleve, 1894 accepted as Pleurosigma scalprum var. gallicum Grunow in Van Heurck, 1880-1885
• Gyrosigma acuminatum var. lacustre (W. Smith) Cleve-Euler, 1952 accepted as Pleurosigma lacustre W.Smith, 1852
• Gyrosigma acuminatum var. lacustre Meister accepted as Pleurosigma lacustre W.Smith, 1852
• Gyrosigma acuminatum var. neglectum McCall, 1933 (uncertain > unassessed)
• Gyrosigma acuminatum var. okamurae (Skvortzow) Skvortzow & Noda, 1971 accepted as Gyrosigma spenceri var. okamurae Skvortzow, 1937
• Gyrosigma acuminatum var. spenceri Kirejeva, 1929 (uncertain > unassessed)
• Gyrosigma aestuarii (Brébisson ex Kützing) Griffith & Henfrey, 1856 accepted as Navicula aestuarii Brébisson ex Kützing, 1849
• Gyrosigma aestuarium Kisselev, 1925 (uncertain > unassessed)
• Gyrosigma agellus (Ehrenberg) Rabenhorst, 1853 accepted as Navicula agellus Ehrenberg, 1840
• Gyrosigma algoris J.R.Carter, 1981 (uncertain > unassessed)
• Gyrosigma angulatum (Quekett) Griffith & Henfrey (uncertain > unassessed)
• Gyrosigma angulatum var. angulatum Griffith & Henfrey, 1856 (uncertain > unassessed)
• Gyrosigma angulatum var. beta Griffith & Henfrey, 1860 (uncertain > unassessed)
• Gyrosigma angulatum var. gamma Griffith & Henfrey, 1860 (uncertain > unassessed)
• Gyrosigma angustum (Donkin) Cleve, 1894 accepted as Carinasigma angustatum (Donkin) G.Reid, 2012
• Gyrosigma angustum var. angustum (Donkin) Cleve, 1894 accepted as Pleurosigma angustum Donkin, 1858
• Gyrosigma angustum var. subflexuosa (Grunow ex Cleve) F.W. Mills, 1934 (uncertain > unassessed)
• Gyrosigma angustum var. sumatrana Cleve, 1894 accepted as Donkinia angusta var. sumatrana De Wild.
• Gyrosigma apula Rabenhorst, 1853 (uncertain > unassessed)
• Gyrosigma arcticum (Cleve) Cleve, 1894
• Gyrosigma arcticum var. arcticum (Cleve) Cleve, 1894 accepted as Rhoicosigma arcticum var. arcticum Cleve, 1873
• Gyrosigma arcticum var. irregularis (H. Peragallo) Cleve, 1894 accepted as Rhoicosigma arcticum var. irregulare H. Peragallo, 1891
• Gyrosigma arcticum var. subflexuosa (Grunow ex Cleve) F.W. Mills, 1934 accepted as Donkinia subflexuosa Grunow ex Cleve, 1894
• Gyrosigma arcutum (Donkin) Sterrenburg in Jahn, R., Sterrenburg, F.A.S. & Kusber, W.-H. accepted as Pleurosigma arcuatum Donkin, 1857
• Gyrosigma attenuata (Kützing) Rabenhorst, 1853 accepted as Frustulia attenuata Kützing, 1834
• Gyrosigma attenuatum (Kützing) Rabenhorst, 1853
• Gyrosigma attenuatum f. attenuatum (Kützing) Cleve, 1894 accepted as Frustulia attenuata Kützing, 1834
• Gyrosigma attenuatum f. hippocampus (W. Smith) Brockmann, 1950 (uncertain > unassessed)
• Gyrosigma attenuatum f. intermedia Petkoff, 1943 (uncertain > unassessed)
• Gyrosigma attenuatum f. subbalticum Carlson, 1913 (uncertain > unassessed)
• Gyrosigma attenuatum f. typica Rabenhorst, 1858 (uncertain > unassessed)
• Gyrosigma attenuatum var. antarcticum Frenguelli & Orlando, 1958 (unaccepted > nomen nudum)
• Gyrosigma attenuatum var. asiatica Skvortzow, 1938 (uncertain > unassessed)
• Gyrosigma attenuatum var. baicalensis Skvortzow & Meyer, 1928 (uncertain > unassessed)
• Gyrosigma attenuatum var. gigas McCall, 1933 (uncertain > unassessed)
• Gyrosigma attenuatum var. hippocampus (W. Smith) Cleve-Euler, 1952 (uncertain > unassessed)
• Gyrosigma attenuatum var. hippocampus Schulz, 1926 accepted as Navicula hippocampus var. hippocampus Ehrenberg, 1838
• Gyrosigma attenuatum var. nipponica Skvortzow, 1936 (uncertain > unassessed)
• Gyrosigma attenuatum var. scalprum (Gaillon) Cleve, 1894 accepted as Navicula scalprum Gaillon, 1827
• Gyrosigma attenuatum var. tientsinensis (Skvortzov, 2012) (uncertain)
• Gyrosigma attenuatum var. typicum Cleve-Euler, 1952 (uncertain > unassessed)
• Gyrosigma baculum W.E.Herwig & F.A.S.Sterrenburg, 2014
• Gyrosigma baicalense (uncertain > unassessed)
• Gyrosigma baicalense f. minus Komarenko in Komarenko & Vasilyeva, 1975 (uncertain > unassessed)
• Gyrosigma baicalense f. minus Komarenko, 1957 (uncertain > unassessed)
• Gyrosigma baikalensis Skvortzov, 1937 (uncertain > unassessed)
• Gyrosigma baileyi (Grunow in Cleve & Grunow) Cleve, 1894 accepted as Pleurosigma baileyi Grunow in Cleve & Grunow, 1880
• Gyrosigma baltica (uncertain > unassessed)
• Gyrosigma baltica f. baltica (Ehrenberg) Rabenhorst, 1853 accepted as Navicula baltica Ehrenberg, 1838
• Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853
• Gyrosigma balticum f. maeoticum (Pantocsek) Proschkina-Lavrenko, 1963 accepted as Pleurosigma balticum var. maeoticum Pantocsek, 1902
• Gyrosigma balticum var. atlanticum W. West, 1912 (uncertain > unassessed)
• Gyrosigma balticum var. beta Griffith & Henfrey, 1856 (uncertain > unassessed)
• Gyrosigma balticum var. brevius Chin & Liu, 1979 (uncertain > unassessed)
• Gyrosigma balticum var. californica (Grunow) Cleve, 1894 accepted as Pleurosigma balticum var. californicum Grunow, 1879
• Gyrosigma balticum var. diminutum (Grunow) Cardinal, Poulin & Berard-Therriault, 1986 accepted as Pleurosigma balticum var. diminutum Grunow, 1880
• Gyrosigma balticum var. incurva Meister, 1932 (uncertain > unassessed)
• Gyrosigma balticum var. lorenzii (Grunow) J.Frenguelli & H.A.Orlando, 1958 accepted as Pleurosigma lorenzii Grunow, 1860
• Gyrosigma balticum var. maeoticum (Pantocsek) Proschkina-Lavrenko, 1950 accepted as Pleurosigma balticum var. maeoticum Pantocsek, 1902
• Gyrosigma balticum var. maximum (Grunow) Woodhead & Tweed, 1958 (uncertain > unassessed)
• Gyrosigma balticum var. similis (Grunow) Cleve, 1894 accepted as Pleurosigma simile Grunow, 1880
• Gyrosigma balticum var. sinensis (Ehrenberg) Cleve, 1894 accepted as Navicula sinensis Ehrenberg, 1847
• Gyrosigma balticum var. sinicum Chin & Liu, 1985 (uncertain > unassessed)
• Gyrosigma balticum var. sulcata Mereschkowsky, 1902-1903 (uncertain > unassessed)
• Gyrosigma balticum var. turgidum Stidolph, 1981 (uncertain > unassessed)
• Gyrosigma balticum var. wandsbeckii (Donkin) Heiden, 1928 accepted as Pleurosigma wansbeckii f. wansbeckii Donkin, 1858
• Gyrosigma beaufortianum Hustedt, 1955 (uncertain > unassessed)
• Gyrosigma bennettii (M. Peragallo in Tempère & Peragallo) Boyer, 1927 accepted as Pleurosigma bennettii M. Peragallo in Tempère & Peragallo, 1909
• Gyrosigma bhusavalensis Sarode & Kamat, 1984
• Gyrosigma bigibbum Zanon, 1949
• Gyrosigma caffra Giffen, 1963 (uncertain > unassessed)
• Gyrosigma calaritanum Zanon, 1948 (uncertain > unassessed)
• Gyrosigma cali G.Reid, 2003
• Gyrosigma centropunctatum Yuhang Li, Nagumo et Kuidong Xu in Li et al., 2020
• Gyrosigma closterioides (Grunow) G. Reid accepted as Pleurosigma prolongatum var. closterioides Grunow, 1884
• Gyrosigma coelophilum Okamoto & Nagumo, 2003
• Gyrosigma compactum (Greville) Cleve, 1894
• Gyrosigma compactum var. compactum (Greville) Cleve, 1894 accepted as Pleurosigma compactum var. compactum Greville, 1857
• Gyrosigma compactum var. constricta (Grunow) Cleve, 1894 accepted as Rhoicosigma reichardtii var. constrictum Grunow, 1877
• Gyrosigma concilians (Cleve) Okolodkov, 1989 accepted as Amphiprora concilians Cleve, 1896
• Gyrosigma concilians var. constricta Okolodkov, 1989 (uncertain > unassessed)
• Gyrosigma constrictum Volkov, 1936 (uncertain > unassessed)
• Gyrosigma contortum Mereschkowsky, 1902 (uncertain > unassessed)
• Gyrosigma contortum var. tenuissimum Mereschkowsky, 1902 (uncertain > unassessed)
• Gyrosigma crassum Meister, 1934 (1935) (uncertain > unassessed)
• Gyrosigma curvulum Rabenhorst, 1853 (uncertain > unassessed)
• Gyrosigma curvulum var. curvulum (Van Heurck) W. West (uncertain > unassessed)
• Gyrosigma cuspidata Rabenhorst, 1853 (uncertain > unassessed)
• Gyrosigma decorum (W. Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma decorum var. decorum W. Smith, 1853
• Gyrosigma delicatulum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma delicatulum var. delicatulum W. Smith, 1852
• Gyrosigma diaphanum Cleve, 1894 (uncertain > unassessed)
• Gyrosigma diminutum (Grunow & Grunow), 1894 accepted as Gyrosigma diminutum (W.Smith) Cleve
• Gyrosigma diminutum (W.Smith) Cleve