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Gamophyceae: Zygnematales: Desmidiaceae

 Euastrum geometricum
W. et G.S. West

Euastrum geometricum Subgenus: Entomum (Apical area deeply indented or notched)
Section: Excisa (Cell surface granulated or dented; apical area with spiny projections)
Species: Cell body 37-38 μm long, 26 μm wide, L/W=1.5, constriction 8 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> E. pulchellum;

Euastrum geometricum var. geometricum, cell body 40 μm long, 28 μm wide, isthmus μm wide, x 640, near Eai-gawa (Eai river), Ishinazaka, Furukawa city, Miyagi Pref., Japan, November 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum geometricum Euastrum geometricum
Euastrum geometricum Euastrum geometricum Euastrum geometricum Euastrum geometricum
Euastrum geometricum Euastrum geometricum

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