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).
Species:
Colpidium campylum,
cell body 61 μm long, 28 μm wide, L/W=2.2,
x 640, drainage ditch near Kondo-numa (Kondo pond) park, Tatebayashi city, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640