Species: Cell body cylindrical, slightly depressed at center,
68-185 μm long,
14-22 μm wide;
chloroplasts with longitudinal ridges; cell wall with small granules arranged longidudinally or sometimes
irregularly; zygospores spherical or slightly elongated
(Photomicrographs of the Fresh-water Algae, 1985).
Penium margaritaceum (Ehrenberg) Brébisson,
cell body μm long, μm wide, L/W=,
x 640, a small pond near Yamakado marsh (Yamakado-Suigen-no-Mori), Nishi-Azai town, Shiga Pref., Japan, June 30, 2008, by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
A small pond near Yamakado marsh (Yamakado-Suigen-no-Mori), Nishi-Azai town, Shiga Pref., Japan, June 30, 2008, by Y. Tsukii