Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Oscillatoria sp.6 4 μm φ Saitama, 2001

Oscillatoria sp.6 3.8 μm φ Japan, 199?

Oscillatoria sp.6* 4 μm φ Shizuoka, 2001

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