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

 Micrasterias papillifera
Brébisson in Ralfs var. papillifera

Micrasterias papillifera 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 papillifera Brébisson in Ralfs var. papillifera, cell body 135 μm long, 110 μm wide, isthmus 20 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 Micrasterias Micrasterias Micrasterias

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