Genus: Colonial; without lorica; individuals clustered at the end of a stalk;
stalks yellow or brownish and usually bent (Kudo, 1966).
cell body μm long, μm wide,
x 100, x 200, x 400, x 640, rice field (near Heritage Resort Golf Course at Shinrin Koen), Koegawa, Konan town, Saitama Pref., Japan, April 18, 2004 by Y. Tsukii
94 μm; x 640