Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Taxonomic Status of Acheilognathus sp. HR (Cypriniformes: Acheilognathidae) Found in the Dalcheon River, a Tributary of Hangang River, Korea

한강 지류 달천에서 발견된 Acheilognathus sp. HR (Cypriniformes: Acheilognathidae)의 분류학적 위치

  • Yong Hwi Kim (Department of Biology, College of Natural Sciences, Soonchunhyang University) ;
  • Bong Han Yun (Department of Biology, College of Natural Sciences, Soonchunhyang University) ;
  • Mu Sung Sung (Department of Biology, College of Natural Sciences, Soonchunhyang University) ;
  • In-Chul Bang (Department of Biology, College of Natural Sciences, Soonchunhyang University)
  • 김용휘 (순천향대학교 생명과학과) ;
  • 윤봉한 (순천향대학교 생명과학과) ;
  • 성무성 (순천향대학교 생명과학과) ;
  • 방인철 (순천향대학교 생명과학과)
  • Received : 2022.09.01
  • Accepted : 2022.12.21
  • Published : 2022.12.31
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Abstract

To investigate the taxonomic status of undescribed species Acheilognathus sp. HR from Korean Acheilognathidae discovered from the Dalcheon River, a tributary of the Hangang River, molecular phylogenetic and morphological characteristics were compared and analyzed with previous studies. As a result of molecular phylogenetic analysis, A. sp. HR formed the same genetic clade as the five subspecies of Acheilognathus tabira, but formed a separate monophyletic group based on the unique genotype, showing clear differences. As a result of morphological analyses, the dorsal fin color in males is grayish and the nuptial coloration of the outer edge of the anal fin is white. The outer edges of the dorsal and anal fins are convexly rounded. A black blotch is present on the dorsal fin of the juvenile, but there is a black blotch absent on the dorsal fin of the small adult female. In the counts, the number of branched dorsal rays is 12~13. In the measurements, the length of the barbels is short and the body depth is deep. Therefore, the A. sp. HR of Hangang River is considered at the level of a distinct species distinguished from each other by the five subspecies of A. tabira by molecular phylogenetic, morphological, and limited distributional characteristics.

한강 지류인 달천에서 발견된 한국산 납자루과 1미기재종 Acheilognathus sp. HR의 분류학적 위치를 알아보기 위하여 분자계통학적 및 형태학적 특성을 선행 연구와 비교 분석하였다. 분자계통학적 분석 결과에서 A. sp. HR은 Acheilognathus tabira의 5개 아종과 동일한 유전적 clade를 형성하면서도 고유한 유전자형을 기반으로 별도의 단계통군을 형성하여 A. tabira의 5개 아종과도 분명한 차이를 보였다. 또한, 형태학적 분석 결과에서 A. sp. HR은 수컷의 등지느러미와 뒷지느러미 외연부는 볼록하게 둥글고, 각각 회색과 흰색을 띠는 점, 치어의 등지느러미 상에는 흑색 반점이 존재하나 암컷 성어의 등지느러미 상에는 흑색 반점이 존재하지 않는 점, 등지느러미 분기 연조 수가 12~13개로 그 범위가 중복되지 않을 정도로 많은 점, 입수염 길이가 짧고, 체고가 높은 점 등에서 A. tabira를 구성하는 5개 아종과 잘 구분되었다. 따라서, A. sp. HR은 A. tabira의 5개 아종과 분자계 통학적, 형태학적 및 제한적 분포 특성에 의하여 서로 구별되는 별도의 종 수준에 있다고 판단된다.

Keywords

Acknowledgement

본 연구에서 일부 'Acheilognathus sp. HR' 표본 확보와 현지 채집에 도움을 주신 보령민물생태관의 조성장 관장님께 감사의 말씀을 전해 드리며, 낙동강 '가시납지리 Acheilognathus chankaensis' 표본을 제공해주신 국립낙동강생물자원관의 김상기 박사님께도 감사의 말씀을 전합니다. 이 논문은 순천향대학교의 연구비를 지원받아 수행된 연구입니다.

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