Family: Stalkless; cell body drawn out; in some species it appear stalklike at rear; peristomal disc not stalked (Illustrated Guide, 1985). Genus: No trochal band when mature; macronucleus long, often C-shaped (Illustrated Guide, 1985). Species: Cell body 60 μm long (Kahl, 1930).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Ushidome-ike (pond), Norikura highland, Azumi, Matsumoto city, Nagano Pref., Japan, November 4, 2007 by Y. Tsukii