title: Strombidinopsis jeokjo n. sp. (ciliophora: choreotrichida) from the coastal waters off western Korea: morphology and small subunit ribosomal DNA gene sequence.
abstract: The planktonic ciliate Strombidinopsis jeokjo n. sp. is described from Quantitative Protargol-Stained (QPS) preparations, and the sequence of the small subunit rDNA (SSU rDNA) from cultured cells is reported. This species is ovoid and bluntly tapered towards the posterior. The ranges (and mean +/- standard deviation, n = 31) of cell length, cell width, and oral diameter of the QPS-stained specimens were 100-190 microm (149 +/- 25), 60-105 microm (79 +/- 13), and 55-80 microm (64 +/- 5), respectively. Fifteen to seventeen external oral polykinetids had oral membranelle cilia 20-35 microm long. Twenty-six to twenty-eight somatic kineties were equally spaced around the cell body and extended from the oral to the posterior regions with 23-44 dikinetids per kinety. Both kinetosomes of each kinetid bore cilia 3-7 microm long. Strombidinopsis jeokjo had two ovoid macronuclei of 25-38 microm x 12-15 microm. When properly aligned, the sequence of the SSU rDNA of S. jeokjo (GenBank Accession No. AJ628250) was approximately 2% different from that of an unidentified Strombidinopsis species (GenBank Accession No. AF399132-AF399135), the closest species in the SSU rDNA sequence.
authors.affiliation: School of Earth and Environmental Science, College of Natural Sciences, Seoul National University, Seoul, 151-747, Republic of Korea. hjjeong@snu.ac.kr
authors.forename: Hae Jin
authors.initials: HJ
authors.lastname: Jeong
authors.forename: Jae Seong
authors.initials: JS
authors.lastname: Kim
authors.forename: Sanghee
authors.initials: S
authors.lastname: Kim
authors.forename: Jae Yoon
authors.initials: JY
authors.lastname: Song
authors.forename: Ilha
authors.initials: I
authors.lastname: Lee
authors.forename: Geon-Hyoung
authors.initials: GH
authors.lastname: Lee
mesh_terms: D000818:Animals; D016798:Ciliophora / Q000235:genetics / Q000302:isolation & purification*; D016054:DNA, Protozoan / Q000235:genetics / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000235:genetics / Q000302:isolation & purification; D017125:Genes, Protozoan; D007723:Korea; D008969:Molecular Sequence Data; D012623:Seawater; D017422:Sequence Analysis, DNA
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal