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e-ased.org, vol. 35, no. 1, pp.33-36, 2019

DOI: https://doi.org/10.5635/ASED.2019.35.1.002

First Record of the Interstitial Annelid Pharyngocirrus uchidai (Annelida: Saccocirridae) from Korea, Confirmed by Topotypic DNA Barcoding Data from Japan

Jiseon Park1, Hiroshi Kajihara2, Jongwoo Jung3,*

Affiliation: 1Interdisciplinary Program of Ecocreative, Ewha Womans University, Seoul 03760, Korea 2Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan 3Department of Science Education, Ewha Womans University, Seoul 03760, Korea

Abstract: The marine interstitial annelid Pharyngocirrus uchidai (Sasaki, 1981) has been only known from Japan. In this study, we report the occurrence of P. uchidai for the first time in four localities along the eastern coast of Korea: Bukmyeon, Gamchu, Gase, and Oeongchi. Species identification was confirmed by comparison of DNA barcoding sequences with morphological examination from the type locality, Oshoro, Japan. We generated a total of 25 sequences of a partial segment (580 bp) of the cytochrome c oxidase subunit I gene (COI), representing five specimens from each locality. Maximum intra-specific variation was 1.2% in terms of Kimura two-parameter (K2P) distance, observed between two individuals each from Gamchu (i.e., between two specimens from the single locality), Gamchu and Oeongchi, Gamchu and Oshoro, and Oeongchi and Oshoro. On the other hand, an identical haplotype was found in all the five localities, substantiating our species identification for the Korean populations. Inter-specific K2P distance between P. uchidai and an unidentified Saccocirrus sp. from Canada (based on public database entries) was 22.4-23.4%.

Keyword: Archiannelida, COI, DNA barcode, mesopsammon, marine invertebrates