Bryometopus triquetrus Foissner, 1993

Kim, Ji Hye & Jung, Atef Omar and Jae-Ho, 2020, Brief description of 18 newly recorded ciliate species from soil and inland waters (Protozoa, Ciliophora) in South Korea, Journal of Species Research 9 (3), pp. 251-268 : 263-264

15. Bryometopus triquetrus Foissner, 1993 ( Fig. 15 )

Material examined. Terrestrial moss collected from Mt. Yeonhwasan , Sinbun-ri , Yeonghyeon-myeon, Goseong-gun, Gyeongsangnam-do, Korea (N 35°4 ʹ 8.2 ʺ, E 128° 13 ʹ 47.1 ʺ) on 4 February 2019 .

Diagnosis. Size 38 - 58 × 22 - 42 μm after protargol impregnation (n = 3). Body roughly inverted triangular; buccal field triangular shape; sharply curved paroral membrane. Single contractile vacuole centrally located below oral field. Single ellipsoidal macronucleus. 24 - 30 adoral membranelles. About 25 somatic kineties.

Distribution. Australia and Korea.

Remarks. The Korean population of B. triquetrus resembles the type population described by Foissner (1993) in most aspects except the number of somatic kineties (25 vs. 19 on average). Bryometopus triquetrus is also similar to B. pseudochilodon Kahl, 1932 , but they mainly differ in the shape of oral field (triangular vs. ellipsoidal) ( Foissner, 1993).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at the Nakdonggang National Institute of Biological Resources (NNIBRPR11662, NNI BRPR11663).

Figures

Fig. 15. Bryometopus triquetrus after protargol impregnation. A. Somatic ciliature and contractile vacuole pore (arrow). B. Triangular oral cavity. C. Single macronucleus. LF, left oral ciliary field; MA, macronucleus; RF, right oral ciliary field. Scale bars=20 μm.