Genus: Flask-shaped; ciliation uniform and complete; slit-like cytostome not reaching the middle of body,
without trichocyst-borders; two or more macronuclei (Kudo, 1966).
Many contractile vacuoles along both dorsal and ventral edges (Carey, 1992).
Images of collecting locality:
A drainage ditch near Asou bridge, Inbanuma cycling road, Hoshina, Yachiyo City, Chiba Pref., Japan, March 16, 2008 by Y. Tsukii