Genus: Postoral kineties usually to left of oral poykinetids (Illustrated Guide, 1985).
Left edge is more curved than right edge; cytopharynx with numerous strong fibrils; ectoplasm with
numerous fusiform trichocysts; macronucleus oval; one to several micronulei (Kudo, 1966).
Species: 150-600 μm long; ventrally flattened;
dark colored; buccal cavity close to anterior end (How to know the protozoa, 1979).
Elongate 150-600 μm long;
anterior is not wider than posterior; cytostome small with well defined pre- and postoral suture;
a large macronucleus with three micronuclei; single contractile vacuole with 12
radiating canals; many trichocysts (Carey, 1992).
Cell body 150-600 μm long (Kahl, 1930).
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