Genus: Body form barrel-shaped; with regularly arranged ectoplasmic plates; cytostome at
anterior end, surrounded by slightly longer cilia; often spinous projection at or near posterior end;
one or more long caudal cilia (Kudo, 1966).
Images of collecting locality:
Tane-ike (pond), Togakushi highland, Shinano town, Nagano Pref., Japan, May 21, 2006 by Y. Tsukii