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Gamophyceae: Zygnematales: Desmidiaceae

 Euastrum cuneatum
Jenner

Euastrum Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)
Species: Cell body medium in size, 90-101 μm long, 48-50 μm wide, L/W=2, isthmus 14-17 μm wide; semicells pyramid-shaped with narrowly flattened apex; lateral margins nearly straight or somewhat wavy; cell wall dotted or with many small pores, bulging inconspicuous (Illustrations of The Japanese Fresh-water Algae, 1977).

Euastrum cuneatum Jenner, cell body 111 μm long, 57 μm wide, L/W=1.9, isthmus 16 μm wide, x 640, No.4, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum cuneatum Euastrum cuneatum Euastrum cuneatum Euastrum cuneatum

Euastrum cuneatum, cell body 100 μm long, 53 μm wide, L/W=1.9, isthmus 18 μm wide, x 640, No.4, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum cuneatum Euastrum cuneatum Euastrum cuneatum

Images of collecting locality: No.4, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii

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