Netrium digitus,
cell body 218 μm long, 61 μm wide, L/W=3.6,
x 640, standing water near Hyoutan-ike (pond), Uba-ga-daira, Nasu town, Tochigi Pref., Japan, July 16, 2006, collected by Eizaburo Tsukii, photo by Y. Tsukii
31 μm
63 μm
94 μm; x 640