Apokeronopsis wrighti Long, Liu, Liu, Miao, Hu,, 2008

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 : 430-432

5. Apokeronopsis wrighti Long, Liu, Liu, Miao, Hu,

Lin & Song, 2008 ( Fig. 5 )

Material examined. Marine water (salinity, 29.3‰) collected from the mud flat of Oryun-ri , Dosan-myeon, Tongyeong-si, Gyeongsangnam-do, Korea (34°54′30.10″ N 128°20′3.90″E) on 6 May 2019 .

Diagnosis. Body size in vivo 150-210 × 40-60 μm (n = 3); ellipsoidal with rounded anterior and posterior end; two types of cortical granules, type I brick red, globular to slightly ellipsoidal, about 1-2 μm across, and grouped in rows along the dorsal kineties and ciliary rows; type II greenish, minute, about 0.3 μm across, and arranged in rows all over the cortex; invariably 2 midventral rows with equal number (40-47) of cirri; 7-9 buccal, 2 or 3 frontoterminal cirri; left and right marginal rows with 31- 43 and 33-44 cirri, respectively; 30-34 transverse cirri extending anteriorly beyond the level of mid-body; 3 dorsal kineties.

Distribution. China and Korea.

Remarks. The Korean population of A. wrighti is identical to the Chinese type population ( Long et al., 2008). Apokeronopsis wrighti is also similar to the closely relat- ed species A. crassa in most features but they can be easily distinguished from each other by the arrangement (in rows vs. sparsely arranged) of the cortical granules ( Shao et al., 2007).

Voucher slides. Two slides with protargol-impregnated specimens were deposited at National Institute of Biological Resources (NIBRPR0000110190, NIBRPR0000110 191).

Figures

Fig. 5. Photomicrograph of Apokeronopsis wrighti in vivo (A, B) and after protargol impregnation(C, D). A. Typical body shape in vivo. B. Details of reddish cortical granulation (arrowheads) and greenish minute cortical granules distributed all over the cortex. C. Ventral ciliature. D. Dorsal kineties. MVR, midventral cirral row; TC, transverse cirrus. Scale bars=50 μm.