Species: Large, ovoid, 120-200 μm long;
oral aperture (cytostome) extends almost to the posterior of the cell; a tuft of caudal cilia posterior;
contractile vacuole dorsal; macronucleus ovoid and curved (Carey, 1992).
120-200 μm long; posterior cilia
40-50 μm long (Kudo, 1966).
Body elliptical; long cytostome 3/4 body length; with large undulatory membrane on left oral
margin; macronucleus kidney-shaped, near rear end; fresh water (How to know the protozoa, 1979).
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50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
