The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Systematic Relationships of Korean Freshwater Snails of Semisulcospira, Koreanomelania, and Koreoleptoxis (Cerithiodiea; Pleuroceridae) revealed byMitochondrial Cytochrome Oxidase I Sequences

  • Kim, Woo-Jin (Biotechnology Research Division, National Fisheries Research and Development Institute) ;
  • Kim, Dae-Hee (Central Regional Inland Fisheries Research, National Fisheries Research and Development Institute) ;
  • Lee, Jun-Sang (Institute of Environmental Research, Kangwon National University) ;
  • Bang, In-Chul (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Lee, Wan-Ok (Central Regional Inland Fisheries Research, National Fisheries Research and Development Institute) ;
  • Jung, Hyung-Taek (Biotechnology Research Division, National Fisheries Research and Development Institute)
  • Received : 2010.09.27
  • Accepted : 2010.11.01
  • Published : 2010.12.31
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Abstract

Many freshwater snail taxa are difficult to identify using morphological traits due to phenotypic plasticity. However, using of molecular DNA marker in combination with morphological traits can provide a reliable means for discriminating among freshwater snail taxa including cryptic species. To discriminate among Korean freshwater snail taxa and resolve their systematic relationships, wesequenced a fragment of mtDNA cytochrome oxidase I (COI) gene from 82 specimens collected from ten different sites distributed along the Korean peninsula. We identified more than seven freshwater snail taxa including cryptic species in Korea. Whereas traditional shell morphology of freshwater snails offers only weak discriminatory power for recognizing 'good' taxa, DNA sequence data provided positive and reliable identification. In addition, a major Semisulcospira clade was clearly separated from the remaining lineages observed including cryptic species. However, a phylogenetic tree inferred from the COI gene data did not fully resolve systematic relationships among pleurocerid taxa in Korea. Establishing more robust shell characteristics for identifying taxa unambiguously and hence improving traditional key shell morphology characters for freshwater snail species is an urgent requirement and will require more rigorous examination of all nominal taxa. While molecular data generated here will be useful for species identification and for describing the systematic relationships among Korean freshwater snails, further analysis will be required.

Keywords

References

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