Haptoria: Pharyngophorida: Tracheliidae
Genus: Body oval to round, rear rounded; 1 proboscis (Illustrated Guide, 1985).
Round cytostome at base of neck; contractile vacuoles many (Kudo, 1966).
Trachelius sp., cell body rounded,
cell body flattened 155 μm long, 123 μm wide,
two ovoidal macronuclei, 28-29 μm long, 24-25 μm wide,
x 400, x 640, Matsumoto, Nagano Pref., Japan, May 2001, collected by N. Kinoshita, photo by Y. Tsukii
ovum small variety ?; but the shape of cytostome and the size of contractile vacuoles
are different from those of ovum
150 μm; x 400
94 μm; x 640
T. ovum Ehrenberg, 1833:
200-400 μm long; ellipsoid body;
cytoplasm much vesiculated, granular, in bands; many water expelling (contractile) vacuoles
(How to know the protozoa, 1979).
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