Staurastrum iotanum Wolle var. iotanum,
cell body 24 μm long, 24 μm wide, L/W=1.0 (including arms), isthmus 6 μm wide,
x 640, Kumakubo, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, December, 2005, collected by Eizaburo Tsukii, photo by Y. Tsukii
31 μm
63 μm
94 μm; x 640