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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum furcatum
f. spinosa Grönblad

Staurastrum forficulatum 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: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species:
Similar species -- >> S. sexangulare;

Staurastrum furcatum f. spinosa Grönblad ?, cell body 26 μm long, 27 μm wide, L/W=1.0, isthmus 9 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 furcatum Staurastrum furcatum Staurastrum furcatum Staurastrum furcatum
Cell body 27 μm long, 26 μm wide, L/W=1.0, isthmus 10 μm wide, x 640
Staurastrum furcatum Staurastrum furcatum Staurastrum furcatum

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