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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum polymorphum
var. groenbladii Hirano

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 polymorphum var. groenbladii Hirano ?, cell body μm long, 35 μm wide, L/W=, isthmus μm wide, x 640, No.4, Shijuhachi-ike (pond), Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 17, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum vestitum Staurastrum vestitum Staurastrum vestitum

Images of collecting locality: No.4, Shijuhachi-ike (pond), Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 17, 2007 by Y. Tsukii

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