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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum zonatum
var. emarginatum 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 zonatum var. emarginatum Hirano ?, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, No.2, Iroha-numa (marsh/bog), Zao mountain, Kaminoyama city & Yamagata city, Yamagata Pref., Japan, July 13, 2008 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum zonatum Staurastrum zonatum Staurastrum zonatum Staurastrum zonatum Staurastrum zonatum

Images of collecting locality: No.2, Iroha-numa (marsh/bog), Zao mountain, Kaminoyama city & Yamagata city, Yamagata Pref., Japan, July 13, 2008 by Y. Tsukii

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