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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 26 μm long, 24 μm wide (excluding spines, up to 3 μm), L/W=1.1, isthmus μm wide, x 640, No. 2, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 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 Staurastrum Staurastrum Staurastrum Staurastrum

Staurastrum sp., cell body ?? μm long, 43 μm wide, L/W=, isthmus ?? μm wide, x 640, No. 2, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 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 Staurastrum
Cell body 31 μm long, 40 μm wide (including spines, up to 3 μm), L/W=, isthmus 11 μm wide, x 640
Staurastrum Staurastrum Staurastrum Staurastrum Staurastrum

Images of collecting locality: No. 2, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii


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