title: Redescriptions of three trachelocercid ciliates (Protista, Ciliophora, Karyorelictea), with notes on their phylogeny based on small subunit rRNA gene sequences.
abstract: Three trachelocercid ciliates, Kovalevaia sulcata (Kovaleva, 1966) Foissner, 1997, Trachelocerca sagitta (Müller, 1786) Ehrenberg, 1840 and Trachelocerca ditis (Wright, 1982) Foissner, 1996, isolated from two coastal habitats at Qingdao, China, were investigated using live observation and silver impregnation methods. Data on their infraciliature and morphology are supplied. The small subunit rRNA (SSU rRNA) genes of K. sulcata and Trachelocerca sagitta were sequenced for the first time. Phylogenetic analyses based on SSU rRNA gene sequence data indicate that both organisms, and the previously sequenced Trachelocerca ditis, are located within the trachelocercid assemblage and that K. sulcata is sister to an unidentified taxon forming a clade that is basal to the core trachelocercids.
authors.affiliation: Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Yan
authors.affiliation: Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Laboratory of Protozoology, College of Life Science, South China Normal University, Guangzhou, China.
authors.forename: Zhenzhen
authors.initials: Z
authors.lastname: Yi
authors.affiliation: Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK.
authors.forename: Alan
authors.initials: A
authors.lastname: Warren
mesh_terms: D002681:China; D016798:Ciliophora / Q000145:classification* / Q000166:cytology / Q000235:genetics / Q000302:isolation & purification; D016054:DNA, Protozoan / Q000235:genetics; D020459:Genes, rRNA; D010802:Phylogeny; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA
chemical_list: D016054:DNA, Protozoan