Frontonia canadensis Roque and Puytorac, 1972

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 : 115

3. Frontonia canadensis Roque and Puytorac, 1972

ẅêṈŦḋflḝ(신%) ( Fig. 1E )

Material examined. Collected from seawater at Bongpo Port , Bongpo-ri , Toseong-myeon , Goseong-gun, Gangwon-do, Korea (38°15 ʹ N, 128°34 ʹ E), October 22, 2017 .

Diagnosis. Size approximately 95-110 × 45-60 μm after protargol impregnation; ellipsoidal body outline, anterior and posterior ends slightly narrow, body length to width ratio of 1.6-2.5: 1; spindle-shaped extrusomes densely arranged beneath pellicle; buccal field approximately 19% of body length; approximately 88 somatic kineties; 3 or 4 vestibular and 5 postoral kineties; peniculi 1-3 each with 4 kinety rows; 1 ellipsoidal macronucleus; one contractile vacuole.

Voucher slide. A slide of protargol-impregnated specimens has been deposited at the National Institute of Biological Resources, Korea (NIBRPR0000109476).

Remarks. Frontonia canadensis was originally described by Roque and Puytorac (1972) and re-described by Pan et al. (2013). The Korean population of F. canadensis closely resembles the description of the Chinese population in terms of the body shape, the number of somatic, postoral, and vestibular kineties, and the number of peniculi 1-3 kinety rows ( Pan et al., 2013).

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).