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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum subparvulum
W. & G. S. West

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: with arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species:

Staurastrum subparvulum W & G S West (or S. biexcavatum ?), cell body 22 μm (excluding arms), 45,50 μm (including arms), 62 μm wide (including arms), x 400, x 640, Shinobazu-ike (pond), Ueno, Taito-ku, Tokyo, Japan, March 2001 by Y Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum

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