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Gamophyceae: Zygnematales: Desmidiaceae

Euastrum crassum
(Brébisson) Kützing var. crassum

Euastrum crassum 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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Euastrum crassum (Brébisson) Kützing var. crassum, semicell 90 μm long (cell body 180 μm), 90 μm wide, L/W=2.0, isthmus 22 μm wide, x 640, No.1, Shimo-Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, September 13, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum crassum Euastrum crassum

Images of collecting locality: No.1, Shimo-Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, September 13, 2006 by Y. Tsukii


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