Enchelys gasterosteus Kahl, 1926

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 : 302-303

13. Enchelys gasterosteus Kahl, 1926 ( Fig. 13 )

Material examined. Freshwater with debris collected from Gyeongpocheon River , Unjeong-dong , Gangneung-si, Gangwon-do, Korea (37°47 ʹ 20 ʺ N, 128°54 ʹ 34 ʺ E) on January 22, 2018 .

Diagnosis. Body size 75-100 × 35-50 μm in vivo; body slightly contractile and flexible with oval to ellipsoidal shape; single contractile vacuole terminally located; oral bulge extrusomes rod-shaped; spherical cortical granules colorless 0.3-0.5 μm in diameter; single oval to ellipsoidal macronucleus, size about 13 × 9 μm; 7 micronuclei; 29-32 somatic kineties; circumoral kinety absent; 3 dorsal brush rows; conical structures inconspicuous in living cell but conspicuous after squashed.

Distribution. Austria, Germany, Korea.

Remarks. Enchelys gasterosteus is similar to E. simplex Kahl, 1926 . The former is, however, smaller than the latter (70-100 μm vs. 150 μm) and has fewer number of somatic kineties (29-32 vs. 44-50) ( Foissner, 1984; Foissner et al., 1995).

Voucher slides. Two slides of protargol-impregnated specimens were deposited at National Institute of Biological Resources, Korea (NIBRPR0000109419, NIBRPR0000109420).

Figures

Fig. 13. Enchelys gasterosteus in vivo(A-D) and after protargol impregnation (E). A. Typical individual. B. Conical structure after specimen squashed. C. Cytoplasmic inclusions with extrusomes and contractile vacuole. D. Cortical granules. E. Somatic ciliature with dorsal brush row (arrow) and micro-(triangular arrowhead) and macronucleus (arrowhead). Scale bars=50μm (A); 10μm (B, D).