Genus: Flask-shaped; elongate, flattened; anterior region neck-like; cilia only on right side;
without trichocyst-borders; cytostome with trichocysts; two macronuclei (Kudo, 1966).
Species: Long, thin and contractile;
cell body is 200 μm long with a very long and thin
neck region and pointed tail; laterally compressed; two macronuclei; a large contractile vacuole with
small satellites (Carey, 1992).
500 μm long (Kahl, 1931).
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