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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum margaritaceum
(Ehrenberg) Meneghini var. margaritaceum

Staurastrum margaritaceum 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 margaritaceum (Ehrenberg) Meneghini var. margaritaceum ?, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, No.1, a small marsh pond at North East of Hachimantai mountain top, Hachimantai city, Iwate Pref., Japan, August 23, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum Staurastrum Staurastrum

Images of collecting locality: No.1, a small marsh pond at North East of Hachimantai mountain top, Hachimantai city, Iwate Pref., Japan, August 23, 2007 by Y. Tsukii

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