Host conservatism, geography, and elevation in the evolution of a Neotropical moth radiation

The origins of evolutionary radiations are often traced to the colonization of novel adaptive zones, including unoccupied habitats or unutilized resources. For herbivorous insects, the predominant mechanism of diversification is typically assumed to be a shift onto a novel lineage of host plants. However, other drivers of diversification are important in shaping evolutionary history, especially for groups residing in regions with complex geological histories. We evaluated the contributions of shifts in host plant clade, bioregion, and elevation to diversification in Eois (Lepidoptera: Geometridae), a hyper-diverse genus of moths found throughout the Neotropics. Relationships among 107 taxa were reconstructed using one mitochondrial and two nuclear genes. In addition, we used a genotyping-by-sequencing approach to generate 4,641 SNPs for 137 taxa. Both data sets yielded similar phylogenetic histories, with relationships structured by host plant clade, bioregion, and elevation. While dive...演化辐射的起源通常可追溯至对新型适应性生态位的开拓，涵盖未被占据的栖息地与未被利用的资源。对于植食性昆虫而言，物种分化的主流机制通常被认为是寄主植物支系的转换。然而，其他物种分化驱动因子在塑造演化历史中同样具有重要作用，对于栖息于地质历史复杂区域的类群而言尤为如此。本研究评估了寄主植物支系、生物区系以及海拔梯度的转变对Eois（鳞翅目：尺蛾科）物种分化的贡献；Eois是一类广泛分布于新热带区的高度多样的蛾类属。研究通过1个线粒体基因与2个核基因，重建了107个分类群之间的系统发育关系。此外，本研究采用基于测序的基因分型（genotyping-by-sequencing）技术，为137个分类群生成了4641个单核苷酸多态性（SNPs，single nucleotide polymorphisms）位点。两套数据集均得到了相似的系统发育历史，分类群间的亲缘关系由寄主植物支系、生物区系以及海拔梯度所塑造。尽管