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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum subarmigerum
Reinsch var. japonicum Roy et Bisset

Staurastrum subarmigerum Section: Radiatiformes (Apexes of semicells with projections; arm-like projections smooth) (Illustrations of The Japanese Fresh-water Algae, 1977) .
Species: Cell body small 25.8 μm long (excluging arm-like projections) (Illustrations of The Japanese Fresh-water Algae, 1977) .
Similar species -- >> S. leptacanthum; S. sexangulare;

Staurastrum subarmigerum Roy et Bisset, cell body 30 μm long (excluding arms), μm wide, L/W=, isthmus μm wide, x 640, Wetland II, 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 subarmigerum Staurastrum subarmigerum Staurastrum subarmigerum Staurastrum subarmigerum

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

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