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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum mutilatum
Lundell

Staurastrum mutilatum 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 mutilatum or S. punctulatum var. subproductum ?, cell body 52 μm long, 48 μm wide, L/W=, isthmus 17 μm wide, x 640, No.1, Kejo-numa, Furukawa-Ono, Osaki city (formerly Furukawa city), Miyagi Pref., Japan, October 29, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum Staurastrum

Images of collecting locality: No.1, Kejo-numa, Furukawa-Ono, Osaki city (formerly Furukawa city), Miyagi Pref., Japan, October 29, 2006 by Y. Tsukii

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