Holophrya teres (Ehrenberg, 1833) Foissner,

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2017, Brief descriptions of 12 ciliate species previously unrecorded (Protozoa: Ciliophora) in Korea, Journal of Species Research 6, pp. 15-25 : 22-23

10. Holophrya teres (Ehrenberg, 1833) Foissner,

Berger and Kohmann, 1994 ( Fig. 10)

Material examined. Brackish water (salinity 2.7‰) taken from the River Gyeongpocheon , Unjeong-dong , Gangneung-si, Gangwon-do, Korea (N37°47 ʹ 20 ʺ, E128°54 ʹ 34 ʺ) on March 23, 2017 .

Diagnosis. Body size 105-145 × 60-70 μm in vivo; obconical shape; oral opening apically located; colorless; flexible; dark granules on posterior portion; oral basket conspicuous, pharyngeal rod about 70 μm in length; single contractile vacuole terminally located; excretory pores about 10 in number; caudal cilia about 10 in number and around 20 μm in length; 87-97 somatic kineties; 3 dorsal brush rows; single ellipsoidal macronucleus, size about 35 × 27 μm; single ellipsoidal micronucleus attached to macronucleus, size about 10 × 5 μm.

Distribution. Cosmopolitan (Alaska, Austria, Czech, England, Germany, India, Italy, Poland, Korea (this study)).

Remarks. Holophrya teres (Ehrenberg, 1833) Foissner, Berger and Kohmann, 1994 can be separated from H. discolor Ehrenberg, 1833 by the number of somatic kineties (87-97 vs. 35-64).

Holophrya teres can also be distinguished from H. ovum Ehrenberg, 1831 by the number of somatic kineties (87-97 vs. 52-80) and the presence of symbiotic algae (absent vs. present) ( Foissner et al., 1994).

Voucher slides. Two slides, including protargol-impregnated specimens, were deposited at the National Institute of Biological Resources, Korea (NIBRPR0000107912, NIBRPR0000107913).