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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum echinatum
Brébisson

Staurastrum echinatum Subgenus: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Section [Raphidiastrum]:
Species: Cell body 23.7 μm long, 23.7 μm wide, isthums 10.8 μm wide, 8 short spines at each side of trianglur semicell in top view (Illustrations of The Japanese Fresh-water Algae, 1977)
Similar species -- >> S. sexangulare;

Staurastrum simonyi Heimerl var. simonyi (Schmidle) Hirano or Staurastrum echinatum Brébisson, cell body μm long, 28 μm wide, L/W=, isthmus 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 simonyi Staurastrum simonyi Staurastrum simonyi Staurastrum simonyi

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