Genus: Colonial; without lorica; individuals clustered at the end of a stalk;
stalks yellow or brownish and usually bent (Kudo, 1966).
cell body about 18 μm long, 6.5 μm wide,
x 200, x 400, x 640, rice field, Tsukamoto, Sakura-ku, Saitama city, Saitama Pref., Japan, October 24, 2004 by Y. Tsukii
94 μm; x 640