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Gamophyceae: Zygnematales: Desmidiaceae

Euastrum geometricum
W. et G.S. West

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).
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