Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum cosmarioides
Nordstedt,

Staurastrum cosmarioides Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells (Illustrations of The Japanese Fresh-water Algae, 1977)
Subgenus: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species: Cell body 100 μm long, 70 μm wide; constriction 34 μm wide; cell wall smooth (Illustrations of the Fresh-water Algae, 1977).
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Staurastrum cosmarioides Nordstedt, cell body 109 μm long, 67 μm wide, isthmus 30 μm wide, x 640, Imou bog, Toyohashi city, Aichi Pref., Japan, September 11, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum cosmarioides Staurastrum cosmarioides Staurastrum cosmarioides Staurastrum cosmarioides

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