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 44 μm long, 29.5 μm wide, L/W=1.5, isthmus 5.5 μm wide,
x 640, No. 3, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii 31 μm
63 μm
94 μm; x 640
Subgenus: Entomum (Apical area deeply indented or notched)
31 μm
