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Cyanophyceae: Nostocales: Oscillatoriaceae

 Oscillatoria limosa
[C. Agardh 1812] Gomont 1892 (John et al. ed. 2002)

Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Trichome straight, without constriction at cell-cell junction, 15-20 μm wide; cell body short, 3-5 μm long, L/W=1/6-1/3; granules present along septum; terminal cells semielliptical, with thickened cell wall (Illustrations of the Japanese Fresh-water Algae, 1977).

Oscillatoria limosa Agardh (or O. curviceps ?), cell body 3.5-4 μm long, 14 μm wide, L/W=0.25-0.45, x 640, rice field, Sano (near Minami-kamishiro railway station), Hakuba village, Nagano Pref., Japan, October 3, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Oscillatoria

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