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Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum echinatum
Heimerl var. 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)
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Staurastrum simonyi
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