Species:
Trichome straight, without constriction at cell-cell junction, 8-9 μm wide;
cell body short, 2-4 μm long, L/W=1/4-1/2; granules absent along septum;
terminal cells semicircular (Illustrations of the Japanese Fresh-water Algae, 1977).
Oscillatoria simplicissima Gomont ?,
cell body 6 μm long, 10 μm wide, L/W=0.6,
x 640, near Todoroki green land, Kawasaki city, Kanawaga Pref., Japan, May 26, 2004 by Y. Tsukii
31 μm
63 μm
94 μm; x 640