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 7. Obertrumia gracilis Foissner, 1989 ( Fig. 1G ) Diagnosis: Body size 65 × 35 μm in protargol preparations; body ellipsoidal, anterior and posterior body ends rounded; rigid. Macronuclear nodule spherical to elliptical, positioned at mid­body with spherical to elliptical micronucleus. Contractile vacuole at mid­body, one excretory pore. Cytoplasm colorless. Usually 60 somatic kineties and bipartite nassulid organelles. Remark: The genus Obertrumia can be distinguished from Nassula mainly by the feature of nassulid organelles (bipartite in Obertrumia ; Foissner et al. , 2002 ). Obertrumia gracilis has similar morphology to the congener O. kahli while the latter species differs from the former by the proportion of the number of bipartite nassulid organelles ( Foissner, 1989 ). Voucher slides: Two slides including protargol­impregnated specimens have been deposited in the National Institute of Biological Resources in Korea (NIBRPR0000 107134, NIBRPR0000107135).