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, L/W=,
x 200, x 400, x 640, used waterfield near Karakemi marsh (Yasaka village), Matsuzaki, Omachi city, Nagano Pref., Japan, April 24, 2005 by Y. Tsukii
94 μm; x 640