Taxonomic implications of recent molecular analyses of Spectacled (<i>Symposiachrus trivirgatus</i>) and Spot-winged (<i>S. guttula</i>) Monarchs (Passeriformes: Monarchidae)

Genomic approaches to phylogeography routinely reveal that our estimates of species level diversity within island systems are woefully underappreciated. A recent analysis of population genetics, phylogeography and historical demography of two pied monarchs (Monarchidae), the Spectacled (<i>Symposiachrus trivirgatus</i>) and Spot-winged Monarchs (<i>S. guttula</i>), uncovered unexpected instances of paraphyly and genetic diversity. Here, we discuss the taxonomic implications for these species complexes and recommend recognising three species within what has been considered <i>S. trivirgatu</i>s. We defer the naming of a genetically distinct and admixed population of <i>S. guttula</i> on Gag Island, Indonesia, and, pending further study, we advocate continued recognition of this species as monotypic. This study highlights cryptic diversity in the Indo-Pacific species complex and the need for thoroughly sampled phylogenomic datasets to reconcile taxonomy with the complex evolutionary history of birds in this region.系统地理学（phylogeography）的基因组学研究方法通常表明，我们对岛屿生态系统内物种级多样性的评估严重不足。近期一项针对两种斑王鹟（王鹟科Monarchidae）——眼斑斑王鹟（<i>Symposiachrus trivirgatus</i>）与斑翅斑王鹟（<i>S. guttula</i>）的种群遗传学、系统地理学及历史种群动态分析，揭示了意外的并系群（paraphyly）现象与遗传多样性。本文就上述物种复合群的分类学意义展开探讨，并建议将此前被归为<i>S. trivirgatus</i>的类群划分为3个独立物种。对于印度尼西亚加格岛上遗传分化显著且存在基因混合的<i>S. guttula</i>种群，我们暂不进行命名；且在开展进一步研究前，主张将该类群仍保留为单型种（monotypic）。本研究凸显了印太地区鸟类物种复合群中的隐存多样性（cryptic diversity），同时也指出，需通过充分采样的系统基因组数据集（phylogenomic datasets），以调和分类学界定与该区域鸟类复杂演化历史之间的矛盾。