Pinacocoleps tesselatus ( Kahl, 1930 ) Foissner

Kim, Ji Hye & Jung, Ji Hye Moon and Jae-Ho, 2018, New records of 24 ciliate species (Protozoa, Ciliophora) collected in South Korea, Journal of Species Research 7 (4), pp. 291-314 : 306

18. Pinacocoleps tesselatus ( Kahl, 1930) Foissner ,

Kusuoka and Shimano, 2008 ( Fig. 18 )

Material examined. Brackish water (salinity 8.6‰) collected from Gyeongpocheon River , Unjeong-dong , Gangneung-si, Gangwon-do, Korea (37°47 ʹ 20 ʺ N, 128°54 ʹ 34 ʺ E) on September 19, 2017 .

Diagnosis. Body size 42-46 × 25-26 μm in vivo; about 30 × 20 μm after protargol impregnation; oval body shape; 23-25 ciliary rows, each composed of about 12 monokinetids; 1 macronucleus size 6-10 × 5-7 μm; one contractile vacuole terminally located; single caudal cilium length about 15-20 μm; anterior and posterior main plates with 3 teeth, respectively; about 2 posterior spines; habitat brackish water.

Distribution. China, Germany, U.S.A., Korea.

Remarks. The Korean population of P. tesselatus is slightly different from the Chinese population in the body length (42-46 μm vs. 60-85 μm) and number of monokinetids (12 vs. 11) ( Lu et al., 2013). However, the Korean and American populations are similar in the body size, but different by the number of anterior plate teeth (3 vs. 5) ( Borror, 1972).

Voucher slides. Two slides of protargol-impregnated specimens were deposited at National Institute of Biological Resources, Korea (NIBRPR0000109434, NIBRPR0000109435).

Figures

Fig. 18. Pinacocoleps tesselatus in vivo(A-C), after protargol impregnation (D, E) and scanning electron microscope (F). A. Typical individual and caudal cilium(arrow). B. Contractile vacuole and posterior spine. C. Surface of armor plates. D. Somatic kineties and macronucleus. E. Adoral organelles (arrowheads). F. Posterior spines (arrows). Scale bars=50μm (A), 30μm (D).