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Gamophyceae: Zygnematales: Desmidiaceae

 Euastrum evolutum
(Nordstedt) W. et G.S. West var. simplicius Hinode

Euastrum Subgenus: Entomum (Apical area deeply indented or notched)
Section: Excisa (Cell surface granulated or dented; apical area with spiny projections)
Species: Cell body 41-43 μm long, 28-30 μm wide, isthmus 7 μm wide, (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> E. turnerii;

Euastrum evolutum (Nordstedt) W. et G.S. West var. simplicius Hinode or Euastrum divaricatum Lundell ?, cell body 40 μm long, 26 μm wide, isthmus 6.5 μm wide, apical indentation deep, x 640, Aquatic botanical garden, Sawara city, Chiba Pref., Japan, October 11, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Euastrum evolutum Euastrum evolutum Euastrum evolutum Euastrum evolutum Euastrum evolutum
Cell body 43 μm long, 30 μm wide, isthmus 7 μm wide, x 640
Euastrum evolutum Euastrum evolutum

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