Bryometopus pseudochilodon Kahl, 1932

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 : 305-306

17. Bryometopus pseudochilodon Kahl, 1932 ( Fig. 17 )

Material examined. Terrestrial moss collected from Samsan-ri , Yeongok-myeon , Gangneung-si, Gangwon-do, Korea (37°48 ʹ 37.6 ʺ N, 128°41 ʹ 54.4 ʺ E) on December 16, 2017 .

Diagnosis. Body size about 65 × 25 μm in vivo, 39-61 × 19-27 μm after protargol impregnation; buccal field 19- 26 μm in length; body roughly reniform; single contractile vacuole centrally located; 18 or 19 adoral membranelles; single oval to ellipsoidal macronucleus, size about 9 × 4 μm; single spherical micronucleus; 23-27 somatic kineties.

Distribution. Austria, Australia, Belgium, Bulgaria, Canada, Côte d’Ivoire, Germany, Greece, Hungary, New Zea- land, Tibet, U.S.A., Korea.

Remarks. The Korean population of B. pseudochilodon is different from the Austrian population in the number of micronucleus (constantly 1 vs. 2-4). Bryometopus pseudochilodon differs from the most similar species B. edaphonus Foissner, 1980 by the location of contractile vacuole (centrally vs. subterminally), the number of somatic kineties (23-27 vs. 16-20), and centrally located single nucleolus (absent vs. present) ( Foissner, 1993).

Voucher slides. Two slides of protargol-impregnated specimens were deposited at National Institute of Bi-

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ological Resources, Korea (NIBRPR0000109430, NI- BRPR0000109431).

Figures

Fig. 17. Bryometopus pseudochilodon in vivo(A, B), after protargol impregnation (C) and DAPI staining (D). A. Typical individual. B. Con- tractile vacuole (arrow). C. Oral ciliature. D. Ellipsoidal macronucleus and single spherical micronucleus(arrowhead). Scale bars=30μm.