Tomikawa Ko, Kobayashi Norio, Morino Hiroshi, Hou Zhong-E, Mawatari Shunsuke F
Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan.
Zoolog Sci. 2007 Feb;24(2):173-80. doi: 10.2108/zsj.24.173.
The genus Jesogammarus contains 16 species in two subgenera, Jesogammarus and Annanogammarus. To examine relationships among species in the genus, a molecular phylogenetic study including eight species of the former subgenus and four of the latter was conducted using partial DNA sequences of the mitochondrial COI and 12S rRNA genes. MP, NJ, and ML trees based on the combined COI and 12S data indicated monophyly of the subgenus Annanogammarus, though the monophyly of Jesogammarus was left unresolved. Consistent with few morphological differences, Jesogammarus (A.) naritai and J. (A.) suwaensis showed low genetic differentiation and did not show reciprocal monophyly, which suggests a close affinity of these taxa.
耶索钩虾属包含两个亚属，即耶索钩虾亚属和安南钩虾亚属，共16个物种。为了研究该属内物种间的关系，利用线粒体COI和12S rRNA基因的部分DNA序列，对包括前一个亚属的8个物种和后一个亚属的4个物种进行了分子系统发育研究。基于COI和12S组合数据构建的MP、NJ和ML树表明，安南钩虾亚属是单系的，尽管耶索钩虾亚属的单系性尚未确定。与很少的形态差异一致，成田耶索钩虾和诹访耶索钩虾显示出低遗传分化，并且没有表现出相互单系性，这表明这些分类单元关系密切。
