Dysteria aculeata Claparède & Lachmann, 1859

Kim, Ji Hye, Omar, Atef & Jung, Ji Hye Moon and Jae-Ho, 2020, Taxonomy of 16 indigenous ciliate species (Protozoa, Ciliophora) from South Korea, Journal of Species Research 9 (4), pp. 427-442 : 436-437

11. Dysteria aculeata Claparède & Lachmann, 1859

( Fig. 11 )

Material examined. Brackish water (salinity, 23.9‰) collected under Gangmun Bridge on Gangmun-dong , Gangneung-si, Gangwon-do, Korea (37°47′48.0″N 128°54′ 51.0″E) on 13 Mar 2019 .

Diagnosis. Body size in vivo 75-85 μm long (n = 2); rectangular with two dorsal spines; 8 ventral kineties in right field, the three right-most of which extend dorsoapically, 5 short kineties in left equatorial field, typical generic oral apparatus, single preoral, 2 circumoral, and 3 left kineties; 2 or 3 contractile vacuoles; and lanceolate podite.

Distribution. France and Korea.

Remarks. The Korean D. aculeata population agrees with the original description of Claparède & Lachmann (1859) in the body shape and the presence of the two dorsal spines. However, the infraciliature of D. aculeata is not available from the two populations recorded so far from the North Sea ( Claparède & Lachmann, 1859; type population) and the Mediterranean Sea ( Gourret and Roeser, 1888) ( Kahl, 1931).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at National Institute of Biological Resources (NIBRPR0000110196, NIBRPR0000110 197).

Figures

Fig. 11. Photomicrograph of Dysteria aculeata in vivo (A) and after protargol impregnation (B, C). A. Left side showing the dorsal spines and the podite. B. Right side somatic ciliature. C. Details of oral ciliature. CO, circumoral kineties; EF, equatorial fragments; LK, left kineties; MA, macronucleus; P, podite; PR, preoral kinety; RK, right kineties; SP, dorsal spines; TF, terminal fragments. Scale bars=30μm.