Genus: Oral polykinetid 3 rectangular; oral area midventral (Illustrated Guide, 1985).
Cytostome right of median line in posterior half; with 3-4 caudal cilia; contractile vacuole terminal
(Kudo, 1966).
Species:
Cinetochilum sp.,
cell body (slightly flattened by coverglass) 35 μm long, 26 μm wide,
x 640, Otto-Numa (pond), Tsuchiura city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cinetocilum margaritaceum Perty, 1852:
Cell body 15-45 μm long; oral area in lower right quadrant of ventral surface;
body ovoid, anterior and posterior rounded (Carey, 1992).