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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria subtilissima
Kützing

Oscillatoria subtilissima Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Trichome solitary or in small group, 1-1.5 μm wide; cell body 1-2 times longer than the width; (Illustrations of The Japanese Fresh-water Algae, 1977).

Oscillatoria subtilissima ?, cell body 2.5-4 μm long, 1.5 μm wide, L/W=1.7-2.7, x 640, wetland at Ichinose-enchi, Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria

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