Brief description of 18 newly recorded ciliate species from soil and inland waters (Protozoa, Ciliophora) in South Korea Author Kim, Ji Hye Natural Science Research Institute, Gangneung-Wonju National University, Gangneung, Republic of Korea Author Jung, Atef Omar and Jae-Ho text Journal of Species Research 2020 9 3 251 268 journal article 10.12651/JSR.2020.9.3.251 2713-8615 13140071 17. Epistylis pygmaeum (Ehrenberg, 1838) Foissner, Berger & Schaumburg, 1999 ( Fig. 17 ) Material examined. Freshwater with some debris collected from Domun-dong , Sangju-si , Gyeongsangbuk-do , Korea ( N 36°26 ʹ 8.09 ʺ , E 128°14 ʹ 29.96 ʺ ) on 14 May 2019 . Diagnosis. Colony dichotomously branching, usually short epistylid stalk; zooid size 35 - 40 × 21 - 27 μm in vivo; zooid shape barrel shape to cylindrical, rarely campanulate; peristomial lip width 21 - 22 μm in vivo (n = 3). Single contractile vacuole located on ventral side. Transverse silverlines, 16 - 23 striations between anterior end and aboral ciliary wreath, 11 - 15 striations between aboral ciliary wreath and scopula. Infundibular polykinety 3 composed of two rows. Distribution. Cosmopolitan. Remarks. Epistylis pygmaeum is a common epizoic peritrich. The Korean population of E. pygmaeum corresponds to other populations. Epistylis pygmaeum is similar to E. anastatica , but mainly differs in the size of zooid (35 - 40 μm vs. 60 - 100 μm) ( Foissner et al. , 1999 ). Voucher slides. Two slides with protargol-impregnated specimens were deposited at the Nakdonggang National Institute of Biological Resources (NNIBRPR11672, NNIBRPR11673).