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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum brachiatum
Ralfs

Staurastrum brachiatum Subgenus: With arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species: Cell body 25-36 μm long, 25-36 μm wide (including spines), isthmus 8.4-9.7 μm wide; constriction medium, bay-opening large; (Illustrations of The Japanese Fresh-water Algae, 1977)
Similar species -- >> Tetraedron limneticum;

Staurastrum brachiatum Ralfs, cell body 23 μm long, 26 μm wide, L/W=, isthmus 10 μm wide, x 640, No. 4, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum brachiatum Staurastrum brachiatum Staurastrum brachiatum
Cell body 25 μm long, 25 μm wide, L/W=, isthmus 9 μm wide, x 640
Staurastrum brachiatum Staurastrum brachiatum Staurastrum brachiatum
Cell body 20-25 μm long, 20-25 μm wide, L/W=, isthmus 10 μm wide, x 640
Staurastrum brachiatum Staurastrum brachiatum Staurastrum brachiatum

Images of collecting locality: No. 4, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii

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