Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Oscillatoria sp. ?,
cell body μm long, 1 μm wide,
x 640, a small fountain near Kamisuwa railway station, Suwa city, Nagano Pref., Japan, May 21, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640