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Litostomatea: Haptoria: Pharyngophorida: Tracheliidae

 Trachelius
Schrank, 1803

Trachelius Genus: Body oval to round, rear rounded; 1 proboscis (Illustrated Guide, 1985). Round cytostome at base of neck; contractile vacuoles many (Kudo, 1966).
Species:

Trachelius sp., cell body 250 μm long, 85 μm wide, x 200, x 400, Japan, 1997 by Y. Tsukii
ovum small variety ?; but the shape of cytostome and the size of contractile vacuoles are different from those of ovum
scale 100 μm scale 200 μm scale 300 μm; x 200
Trachelius Trachelius
scale 50 μm scale 100 μm scale 150 μm; x 400
Trachelius Trachelius Trachelius

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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