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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria subspiroides
Yoneda

Oscillatoria Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Trichome slightly wavy, not constricted at cell-cell junctions, 1.5-2.5 μm long, 8-9 μm wide, L/W=1/6-1/4 (0.17-0.25); granules present along septum; terminal cells rounded as calyptra (Illustrations of The Japanese Fresh-water Algae, 1977).

Oscillatoria subspiroides Yoneda ??, cell body 1-2.5 μm long, 10 μm wide, L/W=0.1-0.3, x 640, rice field, near Ichinoseki Railroad Station, Ichinoseki city, Iwate Pref., Japan, July 24, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria Oscillatoria

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