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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum sp.
W. et 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: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species:

Staurastrum sp. (or S. aristiferum Ralfs var. indentatum or S. o'mearii Archer var. o'mearii ?), cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, Otto-Numa (pond) Chosei-chi, Tsuchiura city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum

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