Redescription of Dexiotricha colpidiopsis (Kahl, 1926) Jankowski, 1964 (Ciliophora, Oligohymenophorea) from a Hot Spring in Iceland with Identification Key for Dexiotricha species
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Acta Protozoologica, 2018, Volume 57, Issue 2, pp. 95 - 106
https://doi.org/10.4467/16890027AP.18.009.8983Authors
We isolated an encysted ciliate from a geothermal field in Iceland. The morphological features of this isolate fit the descriptions of Dexiotricha colpidiopsis (Kahl, 1926) Jankowski, 1964 very well. These comprise body shape and size in vivo, the number of somatic kineties, and the positions of macronucleus and contractile vacuole. Using state-of-the-art taxonomic methods, the species is redescribed, including phylogenetic analyses of the small subunit ribosomal RNA (SSU rRNA) gene as molecular marker. In the phylogenetic analyses, D. colpidiopsis clusters with the three available SSU rRNA gene sequences of congeners, suggesting a monophyly of the genus Dexiotricha. Its closest relative in phylogenetic analyses is D. elliptica, which also shows a high morphological similarity. This is the first record of a Dexiotricha species from a hot spring, indicating a wide temperature tolerance of this species at least in the encysted state. The new findings on D. colpidiopsis are included in a briefly revision of the scuticociliate genus Dexiotricha and an identification key to the species.
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Information: Acta Protozoologica, 2018, Volume 57, Issue 2, pp. 95 - 106
Article type: Original article
Institute of Evolution & Marine Biodiversity, Key Laboratory of Mariculture of the Education Ministry of China, Ocean University of China, Qingdao, China
Department of Ecology, University of Kaiserslautern, 67663 Kaiserslautern, Germany
Exploration & Utilization of Genetic Resources, Matis ohf., Reykjavik, Iceland
Faculty of Food Science and Nutrition, University of Iceland, Reykjavík, Iceland; 5 Department of Biosciences, University of Salzburg, Salzburg, Austria
Exploration & Utilization of Genetic Resources, Matis ohf., Reykjavik, Iceland
Department of Biosciences, University of Salzburg, Salzburg, Austria
Department of Organismic Biology, University of Salzburg, Salzburg, Austria
Department of Molecular Ecology, University of Kaiserslautern, Kaiserslauten, Germany
Department of Ecology, University of Kaiserslautern, 67663 Kaiserslautern, Germany
Published at: 14.12.2018
Article status: Open
Licence: CC BY-NC-ND
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