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 thomasiana var. notata (Nordstedt) Grönblad,
cell body 225 μm long, 180 μm wide, isthmus 33 μm wide,
x 200, x 400, x 640, a wetland at Igashira park, Mooka city, Tochigi Pref., Japan, April 1, 2006 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
a wetland at Igashira park, Mooka city, Tochigi Pref., Japan, April 1, 2006 by Y. Tsukii