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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum sp.

Staurastrum 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:

Staurastrum scabrum Brébisson or similar species (Rutidiastrum), cell body 35 μm long, 34 μm wide, isthmus 13 μm wide, x 640, Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, September 26, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum
Cell body about 30 μm long, 38 μm wide, isthmus 13 μm wide, x 640
Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum

Staurastrum sp., cell body 33 μm long, 32 μm wide, isthmus about 12 μm wide, x 640, Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, September 26, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum

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