Urocentrum turbo (Müller, 1786) Nitzsch, 1827

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2017, Brief descriptions of 12 ciliate species previously unrecorded (Protozoa: Ciliophora) in Korea, Journal of Species Research 6, pp. 15-25 : 23

11. Urocentrum turbo (Müller, 1786) Nitzsch, 1827

( Fig. 11)

Material examined. Freshwater taken from the Gasiyeonseupji wetland, Unjeong-dong , Gangneung-si, Gangwon-do, Korea (N37°47 ʹ 15 ʺ, E128°53 ʹ 42 ʺ) on October 7, 2016 .

Diagnosis. Body size about 60-70 × 45-50 μm in vivo; cork or dumbbell shaped; anterior half wider than posterior body with slightly narrowed mid-body; contractile vacuole terminally located; numerous spindle shaped extrusomes; frontal ciliary band composed of 17-26 rows of kinetids; equatorial ciliary band composed of 80-140 kineties; somatic kineties irregular arranged; 3 buccal membranes; tail cirrus conspicuous; macronucleus, horizontal C-shape in posterior half of body, a single spherical micronucleus attached near macronucleus.

Distribution. Cosmopolitan including Korea (this study).

Remarks. Urocentrum (Müller, 1786) is a monotypic genus. The body shape and somatic ciliature are unique and easy to recognize in this species at low magnifica- tion. Urocentrum turbo predominantly inhabits eutrophic waters ( Foissner et al., 1994).

Voucher slides. Two slides, including protargol-impregnated specimens, were deposited at the National Institute of Biological Resources, Korea (NIBRPR0000107914, NIBRPR0000107915).