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

 Micrasterias pinnatifida
(Kützing) Ralfs 1848

Micrasterias pinnatifida 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 77 μm long, 73 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

Micrasterias pinnatifida (Kützing) Ralfs, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, Kareki-numa (a pond), Nikko city (formerly Fujiwara town), Tochigi Pref., Japan, September 24, 2008 collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Micrasterias pinnatifida Micrasterias pinnatifida

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