Taxonomy of 16 indigenous ciliate species (Protozoa, Ciliophora) from South Korea Author Kim, Ji Hye Natural Science Research Institute, Gangneung-Wonju National University, Gangneung, Republic of Korea Author Omar, Atef Natural Science Research Institute, Gangneung-Wonju National University, Gangneung, Republic of Korea & Department of Zoology, Al Azhar University, Assiut, Egypt Author Jung, Ji Hye Moon and Jae-Ho text Journal of Species Research 2020 9 4 427 442 journal article 10.12651/JSR.2020.9.4.427 2713-8615 13139398 10. Chlamydodon obliquus Kahl, 1931 ( Fig. 10 ) Material examined. Marine water collected from Sinwol mud flat, Goseong-eup , Goseong-gun , Gyeongsangnam-do , Korea ( 34°56′48.60″N 128°20′27.70″E ) on 6 May 2019 . Diagnosis. Body size in vivo 150-240 × 110-150 μm (n = 5); outline ellipsoid to triangular; macronucleus 18- 30 μm in diameter; on average 15 irregularly distributed contractile vacuoles; cross striated band continuous, anterior portion crossing to the dorsal surface; 43-46 right, 4 postoral, and 26-36 left kineties; about 7 terminal fragments on dorsal side; 11-14 nematodesmal rods. Distribution. China , U.S.A. , and Korea . Remarks. The Korean population of C. obliquus is similar to the Chinese population ( Gong et al. , 2005 ) in most aspects. However, they differ in two overlapping features: the body size (150-220 μm vs. 120-180 μm) and the total number of somatic kineties (73-86 vs. 63-74). Chlamydodon obliquus can be easily distinguished from the closely related species C. bourlandi by the number of the contractile vacuoles (ca. 15 vs. 40-68), which is considered an important character to separate Chlamydodon spp. ( Qu et al. , 2018 ). Voucher slides. Two slides with protargol-impregnated specimens were deposited at National Institute of Biological Resources (NIBRPR0000110194, NIBRPR000011 195).