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 2-4 μm long, 3 μm wide, L/W=0.7-1.3,
x 640, standing water at bank of Kurome river, Asaka city, Saitama Pref., Japan, May 16, 2004 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640