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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 274 μm long, 256 μm wide, L/W=1.1, isthmus 50 μm wide, x 200, x 400, x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Micrasterias rotata Micrasterias rotata Micrasterias rotata Micrasterias rotata
Micrasterias rotata Micrasterias rotata Micrasterias rotata Micrasterias rotata

Micrasterias rotata (Greville) Ralfs, cell body 286 μm long, 260 μm wide, L/W=1.1, x 200, x 400, x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Micrasterias rotata Micrasterias rotata Micrasterias rotata Micrasterias rotata
x 640
Micrasterias rotata Micrasterias rotata Micrasterias rotata

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