The Galapagos finches represent a rapid radiation of birds across the remote oceanic archipelago that vary morphologically, behaviourally, and genetically. The level of diversity and rapid rate of speciation have created taxonomic difficulties in resolving phylogenetic relationships. While much of the phylogeny has recently been clarified with modern genomic methods, some of the diversity has been overlooked by under-sampling across islands within presumed species. The woodpecker finch, Camarhynchus pallidus Sclater and Salvin, 1870, represents one such lineage, as all three recognized subspecies have never been fully phylogenetically assessed in regard to their species’ status and relationship with their close sister-species, the mangrove finch (C. heliobates; Snodgrass and Heller 1901). Using genetic and genomic tools, along with morphological analyses, we show that the San Cristobal woodpecker finch (C. p. striatipecta; Swarth 1931) is genetically distinct and paraphyletic with the mangrove finch, compared to all other woodpecker finch subspecies. Given these results we propose that the San Cristobal woodpecker finch be prioritized for further research, as our results hint that it should be given full species’ status as Camarhynchus striatipecta Swarth, 1931.

中文翻译：

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来自加拉帕戈斯群岛的隐藏雀类：来自圣克里斯托瓦尔岛的遗传和形态独特的啄木雀


加拉帕戈斯雀代表了鸟类在偏远海洋群岛上的快速辐射，它们在形态、行为和遗传学上各不相同。物种形成的多样性水平和快速速度在解决系统发育关系方面造成了分类学上的困难。虽然最近用现代基因组方法阐明了大部分系统发育，但由于在假定物种内对岛屿的采样不足，一些多样性被忽视了。啄木雀 Camarhynchus pallidus Sclater 和 Salvin， 1870 代表了这样一个谱系，因为所有三个公认的亚种从未就其物种的地位及其与近亲姐妹物种红树林雀 （C. heliobates ;Snodgrass 和 Heller 1901）。使用遗传和基因组工具以及形态学分析，我们表明圣克里斯托瓦尔啄木雀 （C. p. striatipecta;Swarth 1931）与所有其他啄木雀亚种相比，与红树林雀在遗传上不同且并系。鉴于这些结果，我们建议优先考虑圣克里斯托瓦尔啄木鸟雀进行进一步研究，因为我们的结果暗示它应该被赋予完整的物种地位，即 Camarhynchus striatipecta Swarth， 1931。