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

 Micrasterias americana
Ehrenberg ex Ralfs americana

Micrasterias laticeps 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 americana Ehrenberg ex Ralfs var. americana, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, Ohnuma (a pond at Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, August 2, 2008, collected by Eizaburo Tsukii, photo 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 americana Micrasterias americana

Micrasterias americana Micrasterias americana Micrasterias americana Micrasterias americana Micrasterias americana

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