DNA Barcoding of Isaacsicalanus paucisetus (Copepoda: Calanoida: Spinocalanidae) from the Hydrothermal Vent in the North Fiji Basin, Southwestern Pacific Ocean

  • Park, Chailinn (Global Ocean Research Center, Korea Institute of Ocean Science and Technology) ;
  • Lee, Won-Kyung (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Kim, Se-Joo (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Ju, Se-Jong (Global Ocean Research Center, Korea Institute of Ocean Science and Technology)
  • Received : 2020.03.10
  • Accepted : 2020.04.14
  • Published : 2020.04.30


Isaacsicalanus paucisetus Fleminger, 1983, a monotypic species of the family Spinocalanidae Vervoort, 1951, was first reported from a hydrothermal vent field in the East Pacific Rise off the mouth of the Gulf of California. The mitochondrial cytochrome oxidase I(mtCOI) DNA barcodes are considered a useful tool to assist traditional taxonomy and species discrimination in calanoid copepods. However, the mtCOI DNA barcodes of I. paucisetus have not been reported due to the species rarity and the difficulty of sampling. In this study, we firstly determined the mtCOI DNA barcodes of the I. paucisetus newly collected from a hydrothermal vent in the North Fiji Basin of the southwestern Pacific. All mtCOI DNA barcodes of I. paucisetus were identical and intraspecies variations of spinocalanid species were 0.0-3.0%. Interspecies and intergeneric variations were 13.4-25.2% and 16.7-24.1%, respectively. The DNA barcodes of I. paucisetus obtained in the present study would be helpful for understanding taxonomic relationships of widespread spinocalanid species.


Grant : Exploration for Seafloor Hydrothermal Deposits and Fe-Mn Crusts in the Southwestern Pacific and the Indian Ocean

Supported by : Korea Research Institute of Bioscience and Biotechnology (KRIBB)


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