Taxonomic survey on ciliate diversity in eastern area of Kangwon-province, Korea: Brief records of fifteen species unrecorded from Korea Author Kim, Ji-Yeong Author Jung, Jae-Ho text Journal of Species Research 2016 2016-10-31 5 3 333 342 http://dx.doi.org/10.12651/jsr.2016.5.3.333 journal article 10.12651/JSR.2016.5.3.333 2713-8615 13145003 2. Nivaliella plana Foissner, 1980 ( Fig. 1B ) Diagnosis: Body size 12 × 6 μm in protargol preparations; body reniform to oblong. Macronuclear nodule spherical to elliptical, positioned at posterior half­body. Contractile vacuole at posterior body end. Cytoplasm colorless. Somatic kineties composed of dikinetid; ciliatures strongly reduced. Feeding tube distinct, positioned at anterior body end. Paroral membrane semicircular. Remark: It was the smallest species (ca. 12 μm in length) of this report and co­occurred with G. acuta belonging to the same family. Based on the co­occurrence of the two species from a single moss sample only, it is assum­ ed that their ecological niche is not broad and Foissner (1993) mentioned that G. acuta prefers acidic substrates. Voucher slides: Two slides including protargol­impregnated specimens have been deposited in the National Institute of Biological Resources in Korea (NIBRPR0000 107138, NIBRPR0000107139).