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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum sp.

Staurastrum forficulatum 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:
Similar species -- >> S. sexangulare;

Staurastrum mutilatum Lundell or similar species ?, cell body 39 μm long, 33 μm wide, L/W=1.2, isthmus 14 μm wide, x 640, Ohnuma (a pond at Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, April 1, 2007, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum

Images of collecting locality: Ohnuma (a pond at Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, April 1, 2007, by Y. Tsukii

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