Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Oscillatoria sp.,
cell body 5-10 μm long, 6 μm wide, L/W=0.8-1.8,
x 640, Shiba river, near Owada Park, Saitama city, Saitama Pref., Japan, April 3, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640