New Zealand has a complex recent history of climatic and tectonic change that has left variable signatures in the geographic distribution and genetic structure of the region’s flora and fauna. To identify concordant patterns, a broad range of taxa must be examined and compared. In New Zealand’s North Island, a consensus is forming as to the dominant biogeographic barriers in the region although obligate freshwater taxa have not been considered in this framework. We use single-nucleotide polymorphisms to investigate phylogeography in the widespread obligate freshwater fish Gobiomorphus basalis on the North Island. Phylogeographic patterns within G. basalis reveal biogeographic disjunctions that are in some ways consistent and in other ways at odds with established patterns, providing insight into the processes that have shaped the islands’ biogeography. We also use phylogeography to delineate species boundaries within the entire New Zealand radiation of Gobiomorphus and find that it contains several morphologically cryptic species. We resolve two clades within G. basalis that correspond to areas north and south of the Taupo Volcanic Zone. We confirm the distinctiveness of Gobiomorphus alpinus relative to Gobiomorphus cotidianus, as well as the presence of two lineages within Gobiomorphus breviceps that were previously identified based on mitochondrial data.

中文翻译：

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氏族的欺负者Gobiomorphus basalis（Gobiiformes：Eleotridae）的系统记录和对Gobiomorphus新西兰辐射内物种边界的分析

新西兰近期的气候和构造变化历史复杂，在该地区动植物的地理分布和遗传结构中留下了不同的特征。为了确定一致的模式，必须检查和比较各种各样的分类单元。在新西兰的北岛，就该地区主要的生物地理障碍形成了共识，尽管在此框架中未考虑专性淡水生物分类。我们使用单核苷酸多态性来调查在北岛上广泛专心的淡水鱼Gobiomorphus基底中的系统地理学。基底柏中的植物志模式揭示在某些方面一致且在其他方​​面与既定模式不一致的生物地理分离，从而洞悉塑造岛屿生物地理的过程。我们还使用系统地理学描绘了Gobiomorphus在整个新西兰辐射中的物种边界，发现其中包含几种形态学隐秘的物种。我们解析了G. basalis内的两个进化枝，它们对应于陶波火山区南北。我们确认的特殊性Gobiomorphus鲑相对Gobiomorphus cotidianus，以及两个谱系中存在Gobiomorphus短头蛙属被识别出的基于线粒体数据之前这一点。