Pseudovorticella vestita (Stokes, 1883) Song &, 1989

Kim, Ji Hye & Jung, Atef Omar and Jae-Ho, 2020, Brief description of 18 newly recorded ciliate species from soil and inland waters (Protozoa, Ciliophora) in South Korea, Journal of Species Research 9 (3), pp. 251-268 : 267

18. Pseudovorticella vestita (Stokes, 1883) Song &

Wilbert, 1989 ( Fig. 18 )

Material examined. Brackish water (salinity 4.7‰) with some debris collected from Songji Lake , Injeong-ri , Jugwang-myeon , Goseong-gun, Gangwon-do, Korea (N 38°20 ʹ 00.6 ʺ, E 128°30 ʹ 47.6 ʺ) on 16 September 2019 .

Diagnosis. Zooid size 65 - 80 × 45 - 60 μm in vivo; invert- ed bell-shaped; peristomial lip width about 65 - 85 μm in vivo (n = 3); contractile stalk; two types of macronucleus, longitudinally oriented J-shaped and small globular nodules scattered whole body. Ventrally located contractile vacuole. Conspicuous pellicular vesicles. Rectangular silverlines 15 - 18 striations between peristomial lip and trochal band, 7 - 9 striations between trochal band and scopula. Infundibular polykineties 1 - 3 each consists of three rows, polykinety 3 with shorter inner row and longer and diverged outer two rows.

Distribution. China, Germany, and Korea.

Remarks. The Korean population of P. vestita is similar to other populations except in the shape of the macronucleus (J-shaped and small globular nodules vs. only J-shaped) ( Song and Wilbert, 1989). Pseudovorticella vestita is also similar to P. chlamydophora and differs mainly in the number of silverlines between anterior and trochal band (15 - 18 vs. 17 - 20) and between trochal band and scopula (7 - 9 vs. 14 - 17) ( Song and Wilbert, 1989).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at the Nakdonggang National Institute of Biological Resources (NNIBRPR11686, NNI BRPR11687).

Figures

Fig. 18. Pseudovorticella vestita from life (A), after protargol impregnation (B, C). A. Body shape in vivo to show pellicular vesicles. B. Two kinds of macronuclear pattern (globular type and longitudinal J-shaped type). C. Infundibular polykineties 1-3. MA, macronuclear nodules; P1-3, infundibular polykineties. Scale bar=30 μm.