Genus: Elongate, with a broad rounded or truncate posterior end during locomotion; highly plastic; delicate pellicle shows a fine striation; a free flagellum, long and conspicuous, tapers toward free end; a second flagellum adheres to the pellicle; a contractile vacuole, anterior, close to the reservoir (Kudo, 1966).

P. trichophorum large variety 5 clips cell 100 x 20 μm Japan, 1998	P. trichophorum excystment 3 clips cell 50 μm Japan, 1999	P. trichophorum 3 clips cell 50 μm Japan, 1998
Peranema sp.1 small variety 5 clips cell 31 x 11 μm Japan, 1998

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