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

 Micrasterias brachyptera
P. Lundell

Micrasterias brachyptera 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 brachyptera P. Lundell 1871, cell body 220 μm long, 180 μm wide, isthmus 35 μm wide, x 200, x 400, x 640, Komado marsh (or bog), Showa village and Tajima town, Fukushima Pref., Japan, August 22, 2004, 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 brachyptera Micrasterias brachyptera Micrasterias brachyptera
x 640
Micrasterias brachyptera Micrasterias brachyptera Micrasterias brachyptera Micrasterias brachyptera Micrasterias brachyptera
A dividing cell, x 200, x 400
Micrasterias brachyptera Micrasterias brachyptera Micrasterias brachyptera Micrasterias brachyptera
x 640
Micrasterias brachyptera Micrasterias brachyptera Micrasterias brachyptera

Micrasterias brachyptera (Ehrenberg) Meneghini ex Ralfs : Cell body large, ellipsoidal, slightly longer than wide; strong constriction at center; semicell consists of 5 parts; deepest indentations between apical and adjacent parts at right- and left-hand; apical part with tree spiny projections at each corner; lateral parts dichotomously branched two times (i.e., with three notches, central one larger than others); each branch with small notches; cell wall covered with many short spines; (187-216)-294 μm long, (160-176)-250 μm wide, constriction 30-(34-42) μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).

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