Chlamydodon obliquus Kahl, 1931

Kim, Ji Hye, Omar, Atef & Jung, Ji Hye Moon and Jae-Ho, 2020, Taxonomy of 16 indigenous ciliate species (Protozoa, Ciliophora) from South Korea, Journal of Species Research 9 (4), pp. 427-442 : 435

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).

Figures

Fig. 10. Photomicrograph of Chlamydodon obliquus in vivo(A) and after protargol impregnation (B, C). A. Ventral side showing the cytostome, the ventral ciliature, and the food vacuoles filled with green algae. B. Ventral ciliature and cross striated band. C. Dorsal view. CO, circumoral kineties; CSB, cross striated bands; MA, macronucleus; NR, nematodesmal rods; PR, preoral kinety; TF, terminal fragments. Scale bars=50μm.