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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 Ehrenberg ex Ralfs var. dilatatum, cell body 31 μm long, 31 μm wide, isthmus 12 μm wide, x 640, a pond near the entrance of climbing route to Omine mountain, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum dilatatum Staurastrum dilatatum Staurastrum dilatatum Staurastrum dilatatum

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