Pseudokeronopsis carnea ( Cohn, 1866 )

Kim, Ji Hye, Omar, Atef & Jung, Ji Hye Moon and Jae-Ho, 2020, Taxonomy of 16 indigenous ciliate species (Protozoa, Ciliophora) from South Korea, Journal of Species Research 9 (4), pp. 427-442 : 432-433

6. Pseudokeronopsis carnea ( Cohn, 1866)

Wirnsberger, Larsen & Uhlig, 1987 ( Fig. 6 )

Material examined. Marine water (salinity, 26.9‰) collected under Gangmun Bridge on Gangmun-dong , Gangneung-si, Gangwon-do, Korea (37°47′48.0″N 128°54′51.0″ E) on 19 Mar 2019 .

Diagnosis. Body size in vivo 170-230 × 30-60 μm (n = 7); slender with rounded anterior and posterior end, anterior body portion slightly narrowed and posterior portion distinctly narrowed; flexible but not contractile; contractile vacuole left and posterior to body center; cortical granules orange to brownish in color, scattered all over the cortex and arranged around dorsal bristles and cirri; many macronuclear nodules (>100); adoral zone of membranelles about 30% of body length and consists of 54-60 membranelles; right marginal row with 58-70 cirri, left marginal row with 54-60, 35-43 midventral pairs, 7-9 transverse, 2 pretransverse, 1 buccal cirri, and 5 dorsal kineties.

Distribution. China, Denmark, Germany, Japan, Netherland, United Kingdom, and Korea.

Remarks. The Korean population of Pseudokeronopsis carnea resembles the Chinese population ( Song et al., 2006). In this study, we synonymize the previous Korean P. carnea ( Baek et al., 2011) to P. pararubra on the basis of the length of the midventral rows (terminates at the level of transverse cirri in P. carnea vs. terminates far anterior to transverse cirri in P. pararubra ) and the color of the cortical granules (bright orange-red in P. carnea vs. dark brick-red in P. pararubra ) ( Hu et al., 2004; Baek et al., 2011).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at National Institute of Biological Resources (NIBRPR0000110201, NIBRPR0000110 202).

Figures

Fig. 6. Photomicrograph of Pseudokeronopsis carnea in vivo (A) and after protargol impregnation (B, C). A. Body shape and details of the bright reddish cortical granulation. B. Ventral ciliature. C. Dorsal kineties. 1-5, dorsal kineties; CG, cortical granules; MVP, midventral pairs; PTC, pretransverse cirri; TC, transverse cirri. Scale bars=50 μm.