Uronema marinum Dujardin, 1841

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 : 23-24

12. Uronema marinum Dujardin, 1841

( Fig. 12)

Material examined. Marine water taken from Hupohang port, Hupo-ri , Hupo-myeon , Uljin-gun, Gyeonsangbuk-do, Korea (N36°40 ʹ 52 ʺ, E129°27 ʹ 23 ʺ) on April 5, 2017 .

Diagnosis. Body size about 32-41 × 11-20 μm in vivo; elongate elliptical shape; cytostome in anterior 1/2 to 2/5 of body; spherical single contractile vacuole terminally located; about 12 somatic kineties; 1 caudal cilium 11-16 μm long; M1 composed of 5-7 kinetosomes; M2 slightly longer than M1; M3 short; scutica consisting of 4 or 5 dikinetids, arranged in Y or V-shapes; 1 globular macronucleus, size about 7 × 6 μm; single spherical micronucleus 1.5 μm in diameter.

Distribution. Cosmopolitan ( Antarctica, Benin, China, Germany, Russia, U.S.A., Korea (this study)).

Remarks. The Korean population of U. marinum Dujardin, 1841 can be separated from the Chinese population by the arrangement of scutica (Y or V-shaped vs. always Y-shaped), and the number of scutica dikinetids (4 or 5 vs. 3) ( Wang et al., 2009).

Voucher slides. Two slides, including protargol-impregnated specimens, were deposited at the National Institute of Biological Resources, Korea (NIBRPR0000107916, NIBRPR0000107917).