Tomikawa Ko, Soh Ho Young, Kobayashi Norio, Yamaguchi Aika
Department of Science Education, Graduate School of Education, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8524, Japan.; Email:
Faculty of Marine Technology, Chonnam National University, Yeosu, Jeonnam 550-749, Republic of Korea; Email: unknown.
Zootaxa. 2014 Oct 20;3873(5):451-76. doi: 10.11646/zootaxa.3873.5.1.
To assess the taxonomic relationship between G. nipponensis and G. sobaegensis, morphological features and molecular phylogenetic relationships using the nuclear 28S rRNA and the mitochondrial COI genes were examined. Detailed morphological observations revealed that G. nipponensis and G. sobaegensis were clearly distinguishable. In addition to the morphological differences, these two species were genetically diverged. In the course of this study, an undescribed species was found from Tsushima and Iki Islands and described here as G. mukudai. In the molecular phylogenetic analyses, monophyletic relationships of G. nipponensis, G. sobaegensis, and G. mukudai were shown but relationships among three species were unclear due to low statistical supports. Phylogeography of G. nipponensis, G. sobaegensis, and G. mukudai were discussed.
为了评估日本七鳃鳗（Gnathostoma nipponensis）和崇氏七鳃鳗（Gnathostoma sobaegensis）之间的分类关系，我们研究了它们的形态特征以及利用核28S rRNA和线粒体COI基因构建的分子系统发育关系。详细的形态学观察表明，日本七鳃鳗和崇氏七鳃鳗有明显区别。除形态差异外，这两个物种在基因上也存在分化。在本研究过程中，从对马岛和壹岐岛发现了一个未描述的物种，并在此将其描述为牟田七鳃鳗（Gnathostoma mukudai）。在分子系统发育分析中，显示出日本七鳃鳗、崇氏七鳃鳗和牟田七鳃鳗的单系关系，但由于统计支持率较低，这三个物种之间的关系尚不清楚。我们还讨论了日本七鳃鳗、崇氏七鳃鳗和牟田七鳃鳗的系统地理学。
