Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)
Species:
(Illustrations of The Japanese Fresh-water Algae, 1977).
Euastrum bidentatum Nägeli,
cell body 54 μm long, 37 μm wide, L/W=1.5, isthmus 12 μm wide,
x 640, Ushidome-ike (pond), Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii 31 μm
63 μm
94 μm; x 640
Subgenus: Entomum (Apical area deeply indented or notched)
31 μm
