Strombidium conicum (Lohmann, 1908) Wulff, 1919

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 : 17-18

3. Strombidium conicum (Lohmann, 1908) Wulff, 1919

( Fig. 3)

Material examined. Brackish water (salinity 14‰) taken from the River Gyeongpocheon , Unjeong-dong , Gangneung-si, Gangwon-do, Korea (N37°47 ʹ 20 ʺ, E128°54 ʹ 34 ʺ) on November 17, 2016 .

Diagnosis. Body size 60-75 × 35-40 μm in vivo, elongated obconical shape; pointed posterior end; extrusomes distinctive in vivo, about 10 μm in length; single macronucleus, elongated, ellipsoidal; about 13 buccal membranelles; about 16 collar membranelles; girdle kinety closed, composed of 68-83 dikinetids; ventral kinety longitudinally arranged along right side of specimen, composed of 18-34 dikinetids.

Distribution. Atlantic Ocean, Baltic Sea, China, Germany, North Sea, Norway, Korea (this study).

Remarks. The Korean population of Strombidium conicum (Lohmann, 1908) Wulff, 1919 is different from the Chinese population due to the number of girdle dikinetids (68-83 vs. 45-62) ( Xu et al., 2009). The Korean and German populations are identical ( Agatha and Riedel-Lorjé, 1997).

Voucher slides. Two slides, including protargol-impregnated specimens, were deposited at the National Institute of Biological Resources, Korea (NIBRPR0000107892, NIBRPR0000107893).