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Gamophyceae: Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)

 Micrasterias denticulata
var. angulosa (Hantzsch) W. et G.S. West

Micrasterias denticulata Genus: Cell body flat, large, variable in shape, longer than wide; strong constriction at center; each semicell with several notches; cell wall with many short spines (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Micrasterias denticulata var. angulosa (Hantzsch) W. et G.S. West (or M. denticulata var. angusto-sinuata Gay ?), cell body 302 μm long, 260 μm wide, L/W=1.2, isthmus 45 μm wide, x 200, x 400, x 640, No.6, Mizunashi-Yachi, Komado marsh (No.13), Showa village and Tajima town, Fukushima Pref., Japan, May 21, 2007, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Micrasterias denticulata Micrasterias denticulata Micrasterias denticulata Micrasterias denticulata
Cell body 310 μm long, 260 μm wide, L/W=1.2, isthmus 38 μm wide, x 200, x 400, x 640
Micrasterias denticulata Micrasterias denticulata Micrasterias denticulata Micrasterias denticulata

Images of collecting locality: No.6, Mizunashi-Yachi, Komado marsh (No.13), Showa village and Tajima town, Fukushima Pref., Japan, May 21, 2007, by Y. Tsukii

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