Genus: A single trichome within a rigid sheath; sheath clear or yellowish; filaments planktonic or
agglutinated (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Oscillatoria,
cell body 4.5-9.0 μm long, 11 μm wide, L/W=0.4-0.8,
x 640, Komado marsh (or bog), Showa village and Tajima town, Fukushima Pref., Japan, August 22, 2004, by Y. Tsukii
31 μm
63 μm
94 μm; x 640