Family: Right ventral kineties curve left; twist forward parallel to anterior suture. (Illustrated Guide, 1985).
Genus: Elongate reniform (kidney-shaped); typically one postoral ciliary row; cytostome small, triangular, 1/4 from anterior end toward right side; macronucleus rounded; a micronucleus; a contractile vacuole (Kudo, 1966).

->> Description at WPRNO

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C. campylum 51-69 x 21-26 μm Japan, 1999	C. campylum 55 x 23 μm Uruguay, 1999	Colpidium sp. 55 x 32 μm Japan, 1999	C. campylum 47 x 21 μm Matsumoto Nagano, 2001
C. campylum 60 x 26 μm Uruido Hasuda Saitama, 2005	C. campylum 61 x 28 μm near Kondo-numa Tatebayashi Gunma, 2006	Colpidium sp. 128 x 51 μm Tanadare Kisai Saitama, 2006	C. campylum 67 x 32 μm Kitamoto n.o.p. Kitamoto Saitama, 2006

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