Euastrum ansatum Ralfs ansatum,
cell body 100 μm long, 41 μm wide, L/W=2.4,
isthmus 14 μm wide,
x 640, Omine-numa (pond/marsh), Tsukiyono town, Gunma Pref., Japan, September 2003 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640