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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 marsh, Nikko city (formerly Fujiwara 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
Micrasterias pinnatifida Micrasterias pinnatifida Micrasterias pinnatifida
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 640
Micrasterias pinnatifida Micrasterias pinnatifida

Images of collecting locality: Kareki-numa (a pond), Nikko city (formerly Fujiwara town), Tochigi Pref., Japan, August 2, 2008 by Eizaburo Tsukii

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