Anteholosticha sigmoidea ( Foissner, 1982 ) Berger, 2003

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 : 299

9. Anteholosticha sigmoidea ( Foissner, 1982) Berger ,

2003 ( Fig. 9 )

Material examined. Freshwater with debris collected from Gyeongpocheon River , Unjeong-dong , Gangneung-si, Gangwon-do, Korea (37°47 ʹ 20 ʺ N, 128°54 ʹ 34 ʺ E) on November 16, 2017 .

Diagnosis. Body size about 85 × 18 μm in vivo, 52-65 × 14-21 μm after protargol impregnation; body shape slightly curved left side; both body ends narrowly rounded; flexible; cytoplasm colorless; one contractile vacuole at left mid-body; colorless cortical granules size about 0.6 μm; 4 macronuclear nodules; about 3 micronuclei; 23- 27 adoral membranelles; 3 frontal cirri; 1 buccal cirrus; 2 frontoterminal cirri; 6-8 transverse cirri; 2 pretransverse cirri; 10-12 midventral pairs; 20-29 right and 19-26 left marginal cirri; 4 dorsal kineties.

Distribution. Antarctica, Austria, Brazil, Germany, Namibia, Scotland, Spain, Korea.

Remarks. The Korean population of A. sigmoidea is different from the type population ( Austria) in the body length (85 μm vs. 90-130 μm) and the number of macronuclear nodules (4 vs 6-9) ( Foissner, 1982; Berger, 2006). Anteholosticha sigmoidea can be distinguished from the most similar species, A. sphagni (Grolière, 1975) Berger, 2003 , based on the cortical granules (present vs. absent) ( Berger, 2006).

Voucher slide. One slide of protargol-impregnated specimens was deposited at National Institute of Biological Resources, Korea (NIBRPR0000109472).

Figures

Fig. 9. Anteholosticha sigmoidea in vivo (A, B) and protargol impregnated specimen (C, D). A. Typical individual. B. Cortical granules on dorsal side. C. Ventral view to show macronuclear nodules. D. Somatic ciliature on ventral view. Scale bars=30μm.