Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
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Additional Records of the Hydrothermal Vent Scale Worm Branchinotogluma segonzaci (Polynoidae: Lepidonotopodinae) from the North Fiji Basin and Tonga Arc

  • Lee, Won-Kyung (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Lee, Geon Hyeok (Department of Biological Sciences, Inha University) ;
  • Ju, Se-Jong (Global Ocean Resources Research Center, Korea Institute of Ocean Science & Technology) ;
  • Kim, Se-Joo (Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology)
  • Received : 2021.09.16
  • Accepted : 2021.10.14
  • Published : 2021.10.31
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Abstract

Branchinotogluma segonzaci (Miura and Desbruyères, 1995) occurs in hydrothermal vent fields of the southwestern Pacific Ocean. We morphologically compared B. segonzaci from the North Fiji Basin with the original description from the Lau Basin and a subsequent study of specimens from the Manus Basin. The main characteristics of all B. segonzaci populations were similar having 21 segments, 10 pairs of elytra, cylindrical-shaped anterior lobes, and ventral papillae on segment 12 and ventral lamellae on segments 13-17 in males. However, the specimens from the North Fiji Basin had rounded to sub-renifrom elytra rather than oval in the original description. Additionally, we newly obtained 11 cytochrome oxidase subunit I (COI) DNA barcodes from the North Fiji Basin and Tonga Arc populations and compared them with known COI DNA barcodes of Branchinotogluma species. Thirteen sequences of B. segonzaci showed 0.0-1.07% intraspecific variation and formed two clades in the COI neighbor-joining tree, whereas the interspecific variation among Branchinotogluma species was 8.19-22.4%. The results of this study contribute to biogeographic studies of B. segonzaci and the evolution of polynoid scale worms in chemosynthesis-based ecosystems.

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Acknowledgement

We thank Professor Gi-Sik Min from Inha University for his advice on the alpha taxonomy. We also thank Dr. Sang Woo Jung and Dr. Yoon-Ho Kim from the DASARI Research Institute of BioResources for assistance with imaging the B. segonzaci specimens. This work was supported by an R&D project funded by the Korean Ministry of Ocean and Fisheries(19992001), the Ministry of Science and ICT(WISET-2020-564), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1I1A2044998), and the Korea Research Institute of Bioscience and Biotechnology (KRIBB) Research Initiative Program.

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