Uronemella filificum (Kahl, 1931) Song and Wilbert

Jung, Ji Hye Kim and Jae-Ho, 2019, Brief description of newly recorded eight ciliate species (Protozoa, Ciliophora) collected from South Korea, Journal of Species Research 8 (4), pp. 380-388 : 386-387

8. Uronemella filificum (Kahl, 1931) Song and Wilbert ,

2002 ( Fig. 8 )

Material examined. Marine water (salinity 24‰) collected from Cheonbuhang Port , Cheonbu-ri , Buk-myeon, Ulleng-gun, Gyeongsangbuk-do, Korea (37°32 ʹ 27 ʺ N, 130°52 ʹ 22 ʺ E) on 30 August 2018 .

Diagnosis. Body size about 30 × 15 μm in vivo; body shape obpyriform to broadly oval; frontal end slightly oblique; cytostome slightly beyond mid-body; single globular macronucleus; spindle shape extrusomes rarely observed about 2.5 × 0.6 μm; cytoplasm colorless; single contractile vacuole at posterior end; 21-23 somatic kineties; caudal cilium about 13 μm long; membranelle 1 consists of a long right row and a shorter left row; membranelle 2 and 3 close to each other, each consists of 3 rows of basal bodies.

Distribution. Cosmopolitan.

Remarks. Uronemella filificum is similar to U. parafilificum Gong et al., 2007 but they differ mainly in the number of somatic kineties (21-23 vs. 16 or 17) and the absence (vs. presence) of the elongated, posteriorly located somatic cilia ( Gong et al., 2007; Hu et al., 2009).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at National Institute of BiologicalResources (NIBRPR0000109487, NIBRPR0000109 488) and four slides were deposited at the National Marine Biodiversity Institute of Korea (MABIK PR00043192- PR00043195).

Figures

Fig. 8. Uronemella filificum in vivo (A-C) and after protargol impregnation (D). A. Right side view showing body shape (arrow indicates caudal cilium). B, C. Left side views showing oral apparatus, macronucleus, and extrusomes (arrowheads). D. Ventral view showing oral, somatic infraciliature, and nuclear apparatus. Scale bar=20μm.