Gamophyceae:
Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)
Micrasterias brachyptera
P. Lundell
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:
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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
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
x 640
A dividing cell, x 200, x 400
x 640
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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