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Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum coarctatum
Brébisson

Staurastrum coarctatum Species [ var. coarctatum ]: Cell body 24-33.3 μm long, 28-40 μm wide, L/W=, isthmus 6.5-9 μm wide; corners rounded, slightly curved upward; apex slightly concave.
[ var. subcurtum Nordstedt ]: Cell body 20-28 μm long, 16-28.7 μm wide, L/W=, isthmus 5.5-12 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977)
Similar species -->> S. lapponicum; S. alternans;


Staurastrum coarctatum Brébisson var. coacrtatum ? (or S. bieneanum var. orientale W. et G.S. West ?), cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, Block 4, Kashibaru marsh, Karatsu city, Saga Pref., Japan, September 9, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum coarctatum Staurastrum coarctatum

Images of collecting locality: Block 4, Kashibaru marsh, Karatsu city, Saga Pref., Japan, September 9, 2008 by Y. Tsukii


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