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

 Micrasterias decemdentata
(Nägeli) W. Archer

Micrasterias decemdentata 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 63-84 μm long, 56-76 μm wide, isthmus 14-20 μm wide, (Illustrations of The Japanese Fresh-water Algae, 1977).

Micrasterias decemdentata (Nägeli) W. Archer, cell body μm long, μm wide (L/W=), isthmus μm wide, x 640, rice field, Higashi-sano (near Minami-kamishiro railway station), Hakuba village, Nagano Pref., Japan, October 3, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Micrasterias

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