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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria iwanoffiana
(Nygaard) Geitler

Genus: A single trichome within a rigid sheath; sheath clear or yellowish; filaments planktonic or agglutinated (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body 2-5 μm long, 5-9 μm wide, L/W=0.5; (Illustrations of The Japanese Fresh-water Algae, 1977).

Oscillatoria iwanoffiana (Nygaard) Geitler, cell body 3-6 μm long, 5.5 μm wide, L/W=0.5-1.1, x 640, near Yanase river, Mizuko, Fujimi city, Saitama Pref., Japan, December 28, 2003 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria Oscillatoria

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