Family & Genus: Body ovoid; tentacle-like processes contain toxicysts (Illustrated Guide, 1985).
Cell body ovate or spherical; ciliation uniform; extensible tentacles present among cilia;
contractile vacuole posterior; macronucleus curved band; fresh water (Kudo, 1966).
Species:
Actinobolina sp.,
cell body ovoid 41 μm long,
cytostome anterior with short collar, a contractile vacuole at posterior end,
x 400, x 640, Shirakawa, Fukushima Pref., Japan, October 1999, collected by H. Shiomizu, photo by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Actinobolina vorax:
100-200 μm long; cell body ovoid, pale yellowish brown;
cytostome anterior with short collar; about 30 rows of cilia and tentacles; tentaciles not knobbed;
fresh water (How to know the protozoa, 1979).