Multi-locus phylogenetic analyses support the monophyly and the Miocene diversification of Iksookimia (Teleostei: Cypriniformes: Cobitidae)

Ye Seul Kwan, Daemin Kim, Myeong Hun Ko, Wan Ok Lee, Yong Jin Won

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The genus Iksookimia contains six species of primary freshwater fishes that are endemic to South Korea. Previous phylogenetic studies, based on DNA sequence data from three or fewer loci, have suggested non-monophyly of the genus, providing inconsistent resolutions of the relationships of Iksookimia. Our coalescent and concatenation-based phylogenetic analyses, utilizing seven unlinked nuclear-encoded genes, strongly supported Iksookimia as a monophyletic group, emphasizing the importance of multi-locus data in investigating complicated phylogenetic relationships. A relaxed molecular clock analysis using fossil calibrations, indicated that the origin of the major lineages of Iksookimia occurred between ∼12 to 5 Ma, which is consistent with the Miocene uplift of the Taebaek and Sobaek Mountains and the Miocene activation of the major south-eastern faults. These palaeogeographic events may have served as vicariant events in the diversification of Iksookimia.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalSystematics and Biodiversity
Volume16
Issue number1
DOIs
StatePublished - 2 Jan 2018

Keywords

  • Cobitoidea
  • Korean Peninsula
  • Korean fishes
  • allopatric speciation
  • divergence time estimation
  • freshwater fish
  • species-tree analysis
  • vicariance

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