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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 13 μm long, 10 μm wide (excluding arms or spines), L/W=1.3, cell body 24 μm long, 27 μm wide (including arms or spines), L/W=0.9, isthmus 7 μm wide, x 640, Iroha-numa (marsh), Zao mountain, Yamagata city, Yamagata Pref., Japan, July 9, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum brachiatum Staurastrum brachiatum Staurastrum brachiatum
Cell body 14 μm long, 11 μm wide (excluding arms or spines), L/W=1.3, cell body 22 μm long, 27 μm wide (including arms or spines), L/W=0.8, isthmus 7 μm wide, x 640
Staurastrum brachiatum Staurastrum brachiatum Staurastrum brachiatum

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