Hemiurosoma similis (Foissner, 1982) Foissner,, 2002

Jung, Ji Hye Kim and Jae-Ho, 2018, New record of five ciliates (Protozoa, Ciliophora) collected in eastern Gangwon-do Province, South Korea, Journal of Species Research 7 (2), pp. 181-186 : 183-184

3. Hemiurosoma similis (Foissner, 1982) Foissner,

Agatha and Berger, 2002 ( Fig. 3 )

Material examined. Terrestrial soil collected from Boonsu Park , Gyo­dong , Gangneung­si, Gangwon­do, Korea (37°45 ʹ 48 ʺ N, 128°52 ʹ 29 ʺ E) on October 6, 2016 .

Diagnosis. Body size 150­190 × 20­25 μm in vivo; body cylindrical shape; pointed posterior body end; dorsoven­ trally flattened, flexible; cytoplasm colorless, 2 types of colorless subpellicular granules, larger ellipsoidal granules size 2­3 × 0.7­0.9 μm, smaller spherical granules diameter about 0.5 μm; 1 left and 1 right marginal row; about 20 adoral membranelles; 3 frontal cirri; 1 buccal cirrus; 4 frontoventral cirri; undulating membranes in Gonostomum pattern; 3 transverse cirri; 3 caudal cirri; 2 ellipsoidal macronuclei; 1­3 spherical micronuclei; 3 dorsal kineties.

Distribution. Austria, Costa Rica, Czech, Korea.

Remarks. Hemiurosoma similis is easily distinguished from H. terricola Foissner et al., 2002 in the number of macronuclear nodules (2 vs. 4), and the number of transverse cirri (3 vs. constantly 2) ( Berger, 1999; Foissner et al., 2002).

Voucher slides. Two slides of protargol impregnated specimens were deposited at National Institute of Biological Resources, Korea (NIBRPR0000107967, NIBRPR00001 07968).

Figures

Fig. 3. Hemiurosoma similis in vivo (A­C) and protargol impregnated specimens (D, E). A. Typical individual in vivo. B. Location of con­ tractile vacuole. C. Cortical granules and dorsal kineties on dorsal side.Arrows indicate ellipsoidal granules. Arrowheads mark small spher­ ical granules. D. Ventral view showing oral and somatic ciliatures with nuclear apparatus. E. Dorsal kineties and caudal cirri on dorsal side. AZM, adoral zone of membranelles; CC, caudal cirrus; CV, contractile vacuole; DB, dorsal bristles; DKs, dorsal kineties; MA, macronu­ cleus; MI, micronucleus; TC, transverse cirrus. Scale bars:A, D=100μm.