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Gamophyceae: Zygnematales: Desmidiaceae

 Euastrum sinuosum
var. securiformiceps (Borge) Krieger

Euastrum sinuosum Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)
Species: Cell body 60-74 μm long, 34-46 μm wide, isthmus 8-15 μm wide, (Illustrations of the Fresh-water Algae, 1977).

Euastrum sinuosum var. securiformiceps (Borge) Krieger, cell body 62 μm long, about 30 μm wide, isthmus 11 μm wide, x 640, wetland at Ichinose-enchi, Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum sinuosum Euastrum sinuosum

Images of collecting locality: a wetland at Ichinose-enchi, Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii

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