Vorticella infusionum, Dujardin, 1841

Jung, Ji Hye Kim and Jae-Ho, 2018, New record of five ciliates (Protozoa, Ciliophora) collected in eastern Gangwon-do Province, South Korea, Journal of Species Research 7 (2), pp. 181-186 : 185

5. Vorticella infusionum complex ( Fig. 5 )

Material examined. Brackish water (salinity 1.0‰) collected from the River Gyeongpochen , Unjeong­dong , Gangneung­si, Gangwon­do, Korea (37°47 ʹ 20 ʺ N, 128° 54 ʹ 34 ʺ E) on July 20, 2017 .

Diagnosis. Zooid size 45­55 × 26­34 μm in vivo; belllike shape; peristomial lip single layered and diameter 17­22 μm; 1 contractile vacuole ventrally located; macronucleus horizontal C­shaped; transverse silverlines about 25 rows between peristomial lip to aboral ciliary wreath and about 10 rows between aboral ciliary wreath to scopula; infundibular polykinety 3 (P3) slightly shortened adstomally.

Distribution. Cosmopolitan (Alaska, Antarctica, Argen­ tina, Austria, China, Germany, Iceland, Italy, Poland, Rus­ sia, U.S.A., Korea).

Remarks. Vorticella infusionum complex differs from V. microstoma complex in the shape of macronucleus (horizontal C vs. longitudinal band) (Warren, 1986; Foissner et al., 1992).

Voucher slides. Two slides of protargol impregnated specimens were deposited at National Institute of Biological Resources, Korea (NIBRPR0000107962, NIBRPR00001 07963).

Figures

Fig. 5. Vorticella infusionum in vivo (A), and protargol (B, C) and silver nitrate(D) impregnated specimens.A. Zooid shapes in vivo. B. Oral ciliature. C. Horizontal C­shaped macronucleus. D. Silverline system. CV, contractile vacuole; MA, macronucleus; PL, peristomial lip; P1­3, infundibular polykinety 1­3. Scale bar: 100 μm.