First Record of Two Marine Planktonic Ciliates Rimostrombidium Orientale and R. veniliae (Ciliophora: Choreotrichida) from Korea

摘要

Two marine planktonic ciliates are investigated by using protargol impregnated techniques. These are Rimostrombidium Orientale Song and Bradbury, 1998 and R. veniliae Montagnes and Taylor, 1994. Both species are new to Korean waters. Planktonic ciliates are the important components of pelagic food web and comprise of very diverse groups (Montagnes and Lynn, 1991; Porter et al., 1985). Previous researches on planktonic ciliates were focused on loricate tintinnids, which are conspicuous in morphology,and easy to observe (Montagnes and Lynn, 1991; Leakey et al., 1993). Compared with loricate ciliates, planktonic aloricate ciliates (mostly oligotrichs) are usually more abundant than tintinnids (Beers and Stewart, 1967; Beers, 1969a, b, 1970; Beers et al., 1971; Johansen, 1976; Smetacek, 1981). Thus, it is important to know the information on aloricate ciliates for understanding planktonic ciliate community.