Apogonostomum pantanalense Foissner, 2016

Min, Mi-Hyun Park and Gi-Sik, 2019, New records of one marine and two soil ciliates (Ciliophora: Intramacronucleata) from Korea, Journal of Species Research 8 (1), pp. 113-115 : 113-114

1. Apogonostomum pantanalense Foissner, 2016

qflġ각Ŧậflḝ (신%) ( Fig. 1A, B )

Material examined. Moss-covered soil collected from Songdang-ri, Gujwa-eup, Jeju-si, Jeju-do Island, Korea (33°26 ʹ N, 126°44 ʹ E), June 30, 2017.

Diagnosis. Size 115-165 × 40-80 μm after impregnation; body shape elongated ellipsoid having a tail-like posterior end and narrow anterior end; buccal field occupied approximately 55% of body length; adoral zone composed of approximately 43 membranelles; paroral membrane composed of approximately 14 kinetids; 3 frontal and 2 frontoterminal cirri; 1 buccal cirrus above anterior end of endoral and adjacent to paroral membrane; 6 or 7 ventral cirral pairs; 2 pretransverse and 4 or 5 transverse cirri; right and left marginal rows composed of approximately 22 and 13 cirri, respectively; 3 dorsal kineties; 2 macronuclear nodules with 2 micronuclei.

Voucher slide. A slide of protargol-impregnated specimens has been deposited at the Nakdonggang National Institute of Biological Resources , Korea ( NNIBR2018 113 IV1953) .

Remarks. The Korean population of Apogonostomum pantanalense is simiar to the original description of the Brazilian population ( Foissner, 2016). The Korean population is, however, slightly differ from the Brazilian population in terms of the numbers of paroral kinetids (12-15 vs. 14-26) and ventral cirral pairs (6 or 7 vs. 7-9).

Figures

Fig. 1. Photomicrographs of three ciliates based on live observations (A) and after protargol impregnation (B-E). A, B, Apogonostomum pantanalense, ventral view of live (A) and protargol impregnated (B) specimens, arrows indicate tail-like posterior end; C, D, Keronopsis polychaeta, ventral view of protargol impregnated specimen, arrowheads in (D) denote frontoventral rows; E, Frontonia canadensis, ventral view of protargol impregnated specimen.AZM, adoral zone of membranelles; BC, buccal cirri; Co, frontal corona; EM, endoral membrane; FT, frontoterminal cirri; Ma, macronucleus; PM, paroral membrane; PTC, pretransverse cirri; TC, transverse cirri; VK, vestibular kineties. Scale bars=100μm (A, C), 50μm (B, E).