title: Pseudonotohymena antarctica n. g., n. sp. (Ciliophora, Hypotricha), a New Species from Antarctic Soil.
abstract: A new soil ciliate, Pseudonotohymena antarctica n. g., n. sp., from King George Island, Antarctica, is described based on live observation, protargol impregnation, and its 18S rRNA gene. The new genus Pseudonotohymena is morphologically similar to the genus Notohymena Blatterer and Foissner in the following characteristics: 18 fronto-ventral-transverse cirri, a flexible body, undulating membranes, dorsomarginal kineties, and the number of cirri in the marginal rows. However, Pseudonotohymena differs from Notohymena particularly in the dorsal ciliature, that is, in possessing a nonfragmented dorsal kinety (vs. fragmented). In addition, the molecular phylogenetic relationship of the new species differs from that of Notohymena species. On the basis of the morphological features, the genetic data, and morphogenesis, we establish P. antarctica n. g., n. sp. In addition, the cyst morphology of this species is described.
authors.affiliation: Division of Life Sciences, Korea Polar Research Institute, Incheon, 21990, South Korea.|Department of Biological Sciences, Inha University, Incheon, 22212, South Korea.
authors.forename: Kyung-Min
authors.initials: KM
authors.lastname: Park
authors.affiliation: Division of Life Sciences, Korea Polar Research Institute, Incheon, 21990, South Korea.|Department of Biology, Gangneung-Wonju National University, Gangneung, 25457, South Korea.
authors.forename: Jae-Ho
authors.identifier: 0000-0001-5497-8678
authors.initials: JH
authors.lastname: Jung
authors.affiliation: Department of Biological Sciences, Inha University, Incheon, 22212, South Korea.
authors.forename: Gi-Sik
authors.initials: GS
authors.lastname: Min
authors.affiliation: Division of Life Sciences, Korea Polar Research Institute, Incheon, 21990, South Korea.
authors.forename: Sanghee
authors.initials: S
authors.lastname: Kim
mesh_terms: D000864:Antarctic Regions; D016798:Ciliophora / Q000145:classification* / Q000235:genetics / Q000648:ultrastructure; D016054:DNA, Protozoan / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D017422:Sequence Analysis, DNA / Q000379:methods*; D012987:Soil / Q000469:parasitology*; D013045:Species Specificity
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D012337:RNA, Ribosomal, 18S; D012987:Soil
keywords: 18S phylogeny; Dorsomarginalia; cell division; ciliary pattern; morphology; taxonomy