A barotolerant ciliate isolated from the abyssal deep sea of the North Atlantic: Euplotes dominicanus sp. n. (Ciliophora,Euplotia) |
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| Affiliation: | 1. Division of Polar Life Sciences, Korea Polar Research Institute, Incheon 21990, South Korea;2. Department of Biological Sciences, Inha University, Incheon 22212, South Korea;3. Department of Biological Resources Research, National Institute of Biological Resources, Incheon 22689, South Korea;4. Department of Biology, Gangneung-Wonju National University, Gangneung 25457, South Korea;1. Laboratorio de Protozoología, Departamento de Biología Comparada, Facultad de Ciencias, UNAM, Ciudad Universitaria s/n, 04510 Mexico City, Mexico;2. Instituto de Ecología, A.C., Red de Ecología Funcional, Xalapa, Veracruz, Mexico;3. Universität Salzburg, FB Organismische Biologie, Hellbrunnerstrasse 34, 5020 Salzburg, Austria;1. Laboratory of Protozoology, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Science, South China Normal University, Guangzhou, China;2. Institute of Microbial Ecology and Matter Cycle, School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China;3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China;1. Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China;2. State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China;3. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;4. Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou 510301, China;5. Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, UK;6. Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China |
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| Abstract: | A new Euplotes species, isolated from abyssal depths (>4000 m) of the North Atlantic Ocean, was described based on morphology, ciliary pattern and molecular data. Euplotes dominicanus sp. n. is characterized by a small body size (29–40 × 17–27 μm in vivo), 18–22 adoral membranelles, 10 frontoventral, five transverse and two left marginal cirri and one caudal cirrus, five or six dorsolateral kineties with 7–9 dikinetids in mid-dorsolateral kinety (DK3), and dorsal silverline system of the double-eurystomus type. Phylogenetic analyses inferred from 18S rRNA sequences show that Euplotes dominicanus sp. n. is most closely related to E. curdsi, with a sequence similarity of 97.6 %. Euplotes dominicanus sp. n. was able to survive hydrostatic pressures up to 500 bar indicating its barotolerance. Metabarcoding data demonstrate the presence of E. dominicanus sp. n. in sediments of several deep-sea basins. |
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| Keywords: | Barotolerance Ciliates High hydrostatic pressure Morphology Next generation sequencing Phylogeny |
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