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| Kingdom | Chromista
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| Subkingdom | Harosa
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| Infrakingdom | Halvaria
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| Superdivision | Heterokonta
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| Division | Ochrophyta
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| Class | Bacillariophyceae Haeckel
– diatoms, diatomées |
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| Subclass | Bacillariophycidae Mann
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| Order | Naviculales Bessey
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| Family | Pleurosigmataceae Mersechkowsky
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| Genus | Gyrosigma Hassall |
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Direct Children: |
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| Variety | Gyrosigma spencerii var. curvula (Grunow) C. W. Reimer
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| Species | Gyrosigma acuminatum (Kütz.) Rabenh.
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| Species | Gyrosigma attenuatum (Kütz.) Rabenh.
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| Species | Gyrosigma balticum
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| Species | Gyrosigma beaufortianum Hustedt, 1955
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| Species | Gyrosigma diaphanum Cleve
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| Species | Gyrosigma distortum (Smith) Griffith and Henfrey
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| Species | Gyrosigma exilis (Grunow) C. W. Reimer
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| Species | Gyrosigma eximium (Thwaites) Boyer
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| Species | Gyrosigma fasciola (Ehrenberg, 1839) Griffith and Henfrey, 1856
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| Species | Gyrosigma littorale
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| Species | Gyrosigma macrum (W. Sm.) J. W. Griff. & Henfr.
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| Species | Gyrosigma obscurum (W. Sm.) J. W. Griff. & Henfr.
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| Species | Gyrosigma obtusatum (Sull. & Wormley) Boyer
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| Species | Gyrosigma rectum
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| Species | Gyrosigma reimeri Sterrenburg
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| Species | Gyrosigma sciotoense (Sull. & Wormley) Cleve
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| Species | Gyrosigma simile
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| Species | Gyrosigma strigilis (W. Sm.) Cleve
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| Species | Gyrosigma temperei Cleve
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| Species | Gyrosigma tenuissimum
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| Species | Gyrosigma wansbeckii
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