Condylostoma arenarium Spiegel, 1926

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 : 293

2. Condylostoma arenarium Spiegel, 1926 ( Fig. 2 )

Material examined. Marine water (salinity 29‰) collect- ed from Anin Beach , Gangdong-myeon , Gangneung-si, Gangwon-do, Korea (37°44 ʹ 4.7 ʺ N, 128°59 ʹ 24.2 ʺ E) on June 7, 2018 .

Diagnosis. Body size 495-860× 90-110 μm in vivo; body contractile and flexible; elongated ellipsoidal shape; buccal cavity about 30% of body length; 16 macronuclear nodules moniliform; 103-130 adoral membranelles; 9-11 frontal cirri; 50-58 somatic kineties.

Distribution. Cosmopolitan.

Remarks. The Korean population of C. arenarium is different from the Brazilian population in the number of somatic kineties (50-58 vs. 30-45). The number of somatic kineties, however, shows high variation among population of C. arenarium , and is related to environmental conditions ( Fernandes et al., 2015).

Voucher slides. Two slides of protargol-impregnated specimens were deposited at National Institute of Biological Resources, Korea (NIBRPR0000109424, NIBRPR0000109425) and three slides were deposited at the National Marine Biodiversity Institute of Korea (MABIK PR00043121-PR00043123).

Figures

Fig. 2. Condylostoma arenarium in vivo (A-C) and after protargol impregnation (D, E). A. Typical individual. B. Frontal cirri (arrowheads). C. Cortical granulation. D. Oral and somatic ciliature on anterior part (arrowheads indicate frontal cirri). E. Macronuclear nodules. Scale bars=200 μm (A); 10 μm (C).