Genus: Cell body ovoid or ellipsoid; cytostome about 1/4 the body length, near anterior end, elliposoid, with inconspicuous undulating membrane on right and three membranellae on left; ciliation uniform; 30-40 ciliary rows; macronucleus rounded; a single micronucleus; a contractile vacuole; fresh water (Kudo, 1966). Long axis of opening to oral cavity and polykinetids at ~45 degree angle to long axis of body (Illustrated Guide, 1985). Species:

50 μm 100 μm 150 μm; x 400