Zoothamnium parahiketes Sun, Ji, Song and, 2009

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 : 311

23. Zoothamnium parahiketes Sun, Ji, Song and

Warren, 2009 ( Fig. 23 )

Material examined. Marine water (salinity 29.6‰) collected 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 May 24, 2018 .

Diagnosis. Colony height 300-500 μm; stalk dichoto- mously branched; zooid elongated bell-shaped, measuring 60-80 × 25-30 μm in vivo; double-layered peristomial lip width 34-38 μm; horizontal C-shaped macronucleus; one contractile vacuole dorsally located; transverse silverlines 49-63 striations between peristomial lip and trochal band, about 21-32 striations between trochal band and scopula; two epistomial membranes; P1-3 consisted 3 kineties; P3 slightly separated inner row and outer 2 rows.

Distribution. China, Korea.

Remarks. Zoothamnium parahiketes is different from Z. hiketes Precht, 1935 in the number of silverlines between the peristomial lip and trochal band (49-63 vs. 89-109) and between the trochal band and scopula (21-32 vs. 35- 43), and a gap between of inner row and outer two rows of P3 (present vs. absent) ( Sun et al., 2005; Ji et al., 2009). Voucher slides. Two slides of protargol-impregnated specimens were deposited at National Institute of Biological Resources, Korea (NIBRPR0000109473, NI- BRPR0000109474) and the two slides were deposited at the National Marine Biodiversity Institute of Korea (MABIK PR00043200, PR00043201).

Figures

Fig. 23. Zoothamnium parahiketes in vivo(A, B), after protargol (C, D) and ‘wet’ silver nitrate impregnation (E). A. Colony shape. B. Shape of zooids. C. Macro-(arrow) and micronucleus(arrowhead). D. Infundibular polykinety 2 (P2) (arrowhead) and P3 (arrow). E. Silverline system(arrow indicates trochal band). Scale bars=100μm (A), 50 μm(B).