Genus: With a vase-like chitinous lorica to which stalked or stalkless organism is attached; fresh or salt water; numerous species (Kudo, 1966). Transparent; ovoid; collar indistinct; in lorica (How to know the protozoa, 1979). Solitary or colonial; with firm lorica (theca) as a cup or tube; protoplast with 1 anterior flagellum encircled laterally by well-developed collar; contractile vacuoles posterior in fresh water species (Illustrated Guide, 1985). Species:

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Water reservoir beside Kashiwa-no-ha tennis cort, Kashiwa city, Chiba Pref., Japan, February 11, 2008 by Y. Tsukii