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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum dilatatum
Ehrenberg ex Ralfs var. hibernicum W. et G.S. West

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 var. hibernicum W. et G.S. West ?, cell body 27 μm long, 23 μm wide, L/W=1.2, isthmus 8 μm wide, x 640, Ukishima marsh (or bog), Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, July 3, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum

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