Trichodina nigra Lom, 1960 (fig. 2, d) L o c a l i t y. Lake Berizka, Ivachiv Reservoir, the Danube delta (table 1). D e s c r i p t i o n. Cell diameter 54.6–70.3 (60.6 ± 8.8). Diameter of adhesive disc 43.0– 60.0 (49.9 ± 6.4; 8). Denticle number 20–26 (23.1 ± 1.7; 8). Diameter of denticle ring 25.0– 34.7 (29.1 ± 3.7; 8). Central zone of the denticle ring is clear and evenly impregnated by silver. Blade curved, broad, with truncated apex, closely located to each other; length of blade 6.3–8.0 (7.3 ± 0.6; 8); anterior and posterior margin of blade almost parallel to y–axis. Rays broad in apical margin and tapering downward, clearly directed anteriorly, length of ray 6.0–8.5 (7.4 ± 0.9; 8). The central part is broad. Width of border membrane and diameter of body were not measured.

Published as part of Drobiniak, O., Kutsokon, Yu. & Kvach, Yu., 2014, Trichodinids (Ciliophora, Peritrichia) Of Perccottus Glenii (Actinopterygii, Odontobutidae) In Three Ukrainian Rivers, pp. 231-238 in Vestnik Zoologii 48 (3) on page 235, DOI: 10.2478/vzoo-2014-0026, http://zenodo.org/record/6453044