Cyclidium glaucoma Müller, 1773

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 : 266

16. Cyclidium glaucoma Müller, 1773 ( Fig. 16 )

Material examined. Terrestrial moss collected near Bongnae falls , Dodong-ri , Ulleung-eup, Ulleung-gun, Gyeongsangbuk-do, Korea (N 37°29 ʹ 48.12 ʺ, E 130°53 ʹ 29.64 ʺ) on 29 August 2018 .

Diagnosis. Size in vivo about 20 - 30 × 10 - 15 μm (n = 3). Body ellipsoidal to fusiform with narrow anterior end with both sides convex and wide frontal plate. Cytoplasm colorless. One macronucleus and one micronucleus attached together in anterior half of cell. Contractile vacuole in posterior end of body. Somatic cilia about 8 μm long, caudal cilium up to 20 μm long; 10 - 12 ciliary rows, each with dikinetidal anterior half and monokinetidal posterior half.

Distribution. Cosmopolitan.

Remarks. The Korean population of C. glaucoma is very similar to the Antarctic population ( Foissner et al., 1994; Foissner, 1996). However, they differ mainly in the body size (20 - 30 × 10 - 15 vs 11 - 22 × 8 - 11 μm). It differs from a German population by the ordinary spaced kinetids (vs. closely spaced few kinetids) in the posterior half of the somatic kinety 10 ( Didier & Wilbert, 1981).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at the Nakdonggang National Institute of Biological Resources (NNIBRPR11664, NNIBRPR11665).

Figures

Fig. 16. Cyclidium glaucoma from life (A) and after protargol impregnation (B, C). A. Body shape in vivo. B. Details of oral ciliatures. C. Somatic ciliature on dorsal side. M1-3, membranelles; MA, macronucleus; PM, paroral membrane; SC, scutica. Scale bars=10 μm.