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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum johnsonii
W. & G. S. West

Staurastrum johnsonii 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: with arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species:

Staurastrum johnsonii W. et G.S. West, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, Water reservoir, near Teruoka pasture, Nabekura highland, Iiyama city, Nagano Pref., October 19, 2008, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum johnsonii Staurastrum johnsonii Staurastrum johnsonii
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 640
Staurastrum johnsonii Staurastrum johnsonii Staurastrum johnsonii

Images of collecting locality: Water reservoir, near Teruoka pasture, Nabekura highland, Iiyama city, Nagano Pref., October 19, 2008, by Y. Tsukii

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