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(Ehrenberg, 1838)
Kahl, 1931

Body elongate, posteriorly slightly narrowed. Laterally distinctly flattened, left and right plates of equal size, gaping only anteriorly. Stylus on posterior ventral side. Two contractile vacuoles, ventral in anterior and posterior 1/3 of body. Five right field kineties. Left equatorial field composed of about 6-8 short rows of basal bodies, 1 very short external right equatorial kinety. Preoral kinety shifted slightly backward relative to left frontal kinety field, row of 3-4 basal bodies between circumoral kineties and oral basket. Movement slowly crawling; thigmotactic. Size in vivo about 145 x 65 µm.

Ref.: Deroux (1976), Dragesco and Dragesco-Kernéis (1986), Petz et al. (1995a).

Dysteria monostyla