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Gamophyceae: Zygnematales: Desmidiaceae

Euastrum crassum
(Brébisson) Kützing

Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)

Species: Cell body large, (158-162)-205 μm long, (81-84)-106 μm wide, L/W=2, isthmus (25-26)-30 μm wide; semicells rectangular in shape, each consisting of 3 lobes; lateral lobes large, elongate rectangular, slightly concaved; cell wall covered with small pores (Illustrations of The Japanese Fresh-water Algae, 1977).
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