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 60 μm long, 26 μm wide, L/W=,
x 640, drainage ditch, Uruido, Hasuda city, Saitama Pref., Feburary 6, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640