Heterotrichida Stein, 1859

Jung, Ji Hye Kim and Jae-Ho, 2019, Brief description of newly recorded eight ciliate species (Protozoa, Ciliophora) collected from South Korea, Journal of Species Research 8 (4), pp. 380-388 : 381

Order Heterotrichida Stein, 1859

Family Condylostomatidae Kahl in Doflein and Reichenow, 1929

Genus Condylostoma Bory de St. Vincent, 1824

1. Condylostoma vorax Villeneuve-Brachon, 1940 ( Fig. 1 )

Material examined. Brackish water (salinity 17.4‰) collected from Taehahang Port , Hyeonpo-ri , Buk-myeong, Ulleung-gun, Gyeongsangbuk-do, Korea (37°31 ʹ 24 ʺ N, 130°48 ʹ 52 ʺ E) on 30 August 2018 .

Diagnosis. Body size 200-315 × 55-80 μm in vivo; body contractile and flexible with elongated ellipsoidal shape; buccal cavity 33-38% of body length; cortical granules slightly yellowish and size about 2.5× 1.6 μm; macronucleus moniliform with 13 nodules; 73-87 adoral membranelles; 4 or 5 frontal cirri; 25-30 somatic kineties (n = 8).

Distribution. Korea and France.

Remarks. The Korean population of Condylostoma vorax corresponds well with the type population ( Villeneuve-Brachon, 1940), except for the number of somatic kineties (25-30 vs. 30-34) and the habitat (brackish vs. marine water). Condylostoma vorax is also similar to C. curva Burkovsky, 1970 but differs mainly in having an elongated ellipsoidal (vs. oval) body shape ( Villeneuve-Brachon, 1940; Kim et al., 2012).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at National Institute of Biological Resources (NIBRPR0000109482, NIBRPR0000109 483) and two slides were deposited at the National Marine

Biodiversity Institute of Korea (MABIK PR00043125, PR00043126).

Figures

Fig. 1. Condylostoma vorax in vivo (A-C) and after protargol impregnation (D, E). A, B. Ventral views of typical individuals, showing the buccal cavity and food vacuoles. C. Buccal cavity and cortical granulation. D. Ventral view showing the oral and somatic infraciliature. E. Details of oral apparatus and frontal cirri (arrowheads). Scale bars: A, B, D=100 μm.