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Gamophyceae: Zygnematales: Desmidiaceae

 Euastrum ampullaceum
Ralfs var. ampullaceum

Euastrum Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)
Species: Cell body μm long, μm wide, L/W=, isthmus μm wide; (Illustrations of The Japanese Fresh-water Algae, 1977).

Euastrum ampullaceum Ralfs, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, No.4, Ayamedaira, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, October 6, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum ampullaceum Euastrum ampullaceum

Images of collecting locality: No.4, Ayamedaira, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, October 6, 2007 by Y. Tsukii

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