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J Eukaryot Microbiol. 2017 Jul;64(4):447-456. doi: 10.1111/jeu.12381. Epub 2016 Nov 21.

Pseudonotohymena antarctica n. g., n. sp. (Ciliophora, Hypotricha), a New Species from Antarctic Soil.

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Division of Life Sciences, Korea Polar Research Institute, Incheon, 21990, South Korea.
Department of Biological Sciences, Inha University, Incheon, 22212, South Korea.
Department of Biology, Gangneung-Wonju National University, Gangneung, 25457, South Korea.


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.


18S phylogeny; Dorsomarginalia; cell division; ciliary pattern; morphology; taxonomy

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