Study on symbiotic systems with Nothofugus species in southern hemisphere

在这项研究中，我研究了一些草食性昆虫及其寄主植物Nothofagus属的系统发育关系，这些昆虫分布在南半球。本研究的结果如下：1)在象甲中，利用Nothofagus的物种也可以独立起源于大洋洲和南美洲。2)在鳞翅目中，大洋洲和南美洲都属于同一属，与鳞翅目有较近的亲缘关系，表明这两种蛾都发生了洲际迁徙。

In this study, I examined phylogoenetic relations of some herbivorous insects and its host plants, genus Nothofagus species, which distribute in the Southern Hemisphere. The results of this study are as follows ; 1) In weevils, the species using Nothofagus could be originated independently in Oceania and South America, also. In addition, diversity of both groups were high in Oceania than in South America, 2) In Lepidoptera, closely related species of Nothofagus are used species belongs to same genus in both Oceania and South America, and it is suggested that intercontinental migration had occurred in those moths.