|  Genus: Cigar- or foot-shaped; a single macronucleus and 1 to several vesicular or compact microuclei 
(Kudo, 1966). Species: 200-330 μm long; 
a single macronucleus; four or more vesicular micronuclei; 
three to seven contractile vacuoles (Kudo, 1966).  
200-350 μm long; four vesicular micronuclei 
(How to know the protozoa, 1979).
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