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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria cortiana
Meneghini

Oscillatoria Family: Trichome (filamentous structure) lacks heterocysts; with equal diameter throughout whole length; no hair-like structure; no branching.
Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).

Oscillatoria cortiana Meneghini ?, cell body 4.5-7 μm long, 4.5 μm wide, L/W=1.0-1.6, x 640, rice field, Tsukamoto, Sakura-ku, Saitama city, Saitama Pref., Japan, July 25, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria

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