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 truncata (Corda) Brébisson var. truncata,
cell body 130 μm long, 114 μm wide, L/W=1.1, isthmus 33 μm wide,
x 640, No.3, Imou bog, Toyohashi city, Aichi Pref., Japan, September 24, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.3, Imou bog (marsh), Toyohashi city, Aichi Pref., Japan, September 24, 2006 by Y. Tsukii