Euplotidium itoi Ito, 1958

Min, Kang-San Kim and Gi-Sik, 2018, New records of nine ciliates (Protozoa: Ciliophora) from Korea: Brief descriptions and remarks, Journal of Species Research 7 (4), pp. 315-322 : 315-316

1. Euplotidium itoi Ito, 1958 ( Fig. 1 )

Material examined. Seawater (salinity 30.7‰) taken from Lake Yeongnangho , Geumho-dong, Sokcho-si, Gangwon Province, South Korea (38°12 ʹ 58 ʺ N 128°34 ʹ 25 ʺ E) on June 2012 .

Diagnosis. Cell size 55-80 × 30-45 μm in protargol preparations, rigid, bell-shaped; 56-61 adoral zone of membranelles; 2 elongated macronucleus nodules; 12 frontoventral cirri; 6 transverse cirri; 1 left marginal cirrus; 5 dorsal kineties.

Remarks. Regarding its congener in terms of the cirral pattern on the ventral and dorsal sides, Euplotidium itoi should be compared with two congeners, E. arenarium and E. rosati . Euplotidium arenarium can be distinguished from E. itoi based on the number of frontal cirri (10 vs. 12), the number of transverse cirri (5 vs. 6), and the number of macronucleus nodules (5-10 vs. 2). Euplotidium rosati has similar ventral ciliature to E. itoi . However, the former species differs from E. itoi in the left marginal cirrus (absent vs. present) ( Ito, 1958; Lei et al., 2002; Modeo et al., 2013).

Deposition. One voucher slide with protargol-impregnated specimens is deposited in the National Institute of Biological Resources in Korea (NIBRPR0000109444).

Figures

Fig. 1. Photomicrographs of Euplotidium itoi from after protargol impregnation (A, B). (A) Ventral view.(B) Dorsal view. Scale bar=50 μm.