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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum dilatatum
Ehrenberg ex Ralfs var. dilatatum

Staurastrum dilatatum 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 dilatatum or similar species, cell body 34 μm long, 33 μm wide, isthmus 13 μm wide, L/W=1.0, x 640, Kakuman-buchi at Akagi mountain, Fujimi village, Gunma Pref., Japan, April 30, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum

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