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(Claparède and Lachmann, 1858)
Kahl, 1932

Body broadly fusiform, narrowed posteriorly, right margin distinctly convex, vaulted dorsally. Macronucleus possibly fragmented. Colour yellow-brown to reddish, sometimes colourless. Two left marginal, 1 right marginal, 2 midventral cirral rows. Adoral zone of membranelles along about 1/3 of body length, extending far onto right side. Size 110-150 x 45-55 µm.

Ref.: Hamburger and Buddenbrock (1911), Kahl (1932).

Trichototaxis crassa