Peritromus faurei Kahl, 1932

Omar, Atef & Jung, Ji Hye Choi and Jae-Ho, 2023, New record of ten ciliate species (Protozoa, Ciliophora) from South Korea, Journal of Species Research 12 (1), pp. 95-108 : 96

1. Peritromus faurei Kahl, 1932 ( Fig. 1 )

Material examined. Marine water (salinity 26.8‰) collected from Anin Beach , Gangdong-myeon , Gangneung-si, Gangwon-do, Korea (37°44 ʹ 4 ʺ N, 128°59 ʹ 25 ʺ E) on June 14, 2021 .

Diagnosis. Size 60 - 100 × 40 - 55 μm in vivo and 40 - 50 × 25 - 35 μm after protargol impregnation (n = 5); body reniform with anterior half more broadly rounded than posterior, dorsoventrally flattened with distinct hump on dorsal side without ornamentation, very flexible and high- ly contractile; 2 globular macronuclear nodules, micronuclei not observed; cortical granules ellipsoidal and colorless; 23 - 25 ventral kineties of which 3 or 4 preoral kineties; adoral zone of membranelles occupies about third of extended body length and consists of 40 - 48 adoral membranelles.

Distribution. Benin, China, Germany, Mexico, USA, South Korea.

Remarks. The Korean population of Peritromus faurei corresponds with the Chinese population studied by Song and Wilbert (1997) in most features. Up to date, there are only two species in the genus, P. faurei and P. kahli Villeneuve-Brachon, 1940 . Peritromus faurei differs from P. kahli mainly by the body size (≤100 μm vs.>100 μm), the number of somatic ciliary rows (20 - 26 vs. 25 - 50), the number of adoral membranelles (<50 vs.>60), and the ornamentation on dorsal side (absent vs. present) ( Borror, 1963; Dragesco and Dragesco-Kernéis, 1986; Carey, 1992; Song and Wilbert, 1997; Rosati et al., 2004; Jin et al., 2021).

Voucher slides. One slide with protargol-impregnated specimens was deposited at the National Institute of Biological Resources, Korea (NIBRPR0000111065).

Figures

Fig. 1. Peritromus faurei in life (A-C) and after protargol impregnation (D). A-C, Dorsal (A, B) and ventral (C) view showing the body shape, the adoral zone of membranelles, the globular macronuclear nodules, the dorsal hump, and the somatic kineties. D, Ventral view showing the somatic and oral ciliature, and the nuclear apparatus.AZM, adoral zone of membranelles; H, dorsal hump; MA, macronucleus; SK, somatic kineties. Scale bars 20μm.