Genus: When extended, trumpet-shaped or cylindrical; highly contractile; some with
mucilaginous lorica; conspicuous peristomal field frontal; contractile vacuole anterior-left; fresh water
(Kudo, 1966).
Species: Body trumpet-shaped; macronucleus moniliform;
1-2 μm when extended;
ck tractile vacuole anterior; pellicle dark, bluish-green color (How to know the protozoa, 1979).