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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P. multi. stock CH308 230 x 65 μm Japan, 199?	P. multi. Mic. visible 250 x μm Kanazawa Ishikawa, 2002	P. multi. ?? 230 x 53 μm drainage ditch Kurihashi Saitama, 2006

Similar genus --> > P. caudatum;

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