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

 Micrasterias rotata
(Greville) Ralfs

Micrasterias rotata 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: Cell body 256-288 μm long, 192-258 μm wide, constriction 31-40 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Micrasterias rotata (Greville) Ralfs, cell body μm long, μm wide, L/W=, x 200, x 400, x 640, No. 1, Oyomi marsh, Hakuba village, Nagano Pref., Japan, June 1, 2008 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 Micrasterias Micrasterias Micrasterias Micrasterias Micrasterias

Images of collecting locality: No. 1, Oyomi marsh, Hakuba village, Nagano Pref., Japan, June 1, 2008 by Y. Tsukii

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