New world coralsnakes of the genus Micrurus are a diverse radiation of highly venomous and brightly colored snakes that range from North Carolina to Argentina. Species in this group have played central roles in developing and testing hypotheses about the evolution of mimicry and aposematism. Despite their diversity and prominence as model systems, surprisingly little is known about species boundaries and phylogenetic relationships within Micrurus, which has substantially hindered meaningful analyses of their evolutionary history. Here we use mitochondrial genes together with thousands of nuclear genomic loci obtained via ddRADseq to study the phylogenetic relationships and population genomics of a subclade of the genus Micrurus: The M. diastema species complex. Our results indicate that prior species and species-group inferences based on morphology and color pattern have grossly misguided taxonomy, and that the M. diastema complex is not monophyletic. Based on our analyses of molecular data, we infer the phylogenetic relationships among species and populations, and provide a revised taxonomy for the group. Two non-sister species-complexes with similar color patterns are recognized, the M. distans and the M. diastema complexes, the first being basal to the monadal Micrurus and the second encompassing most North American monadal taxa. We examined all 13 species, and their respective subspecies, for a total of 24 recognized taxa in the M. diastema species complex. Our analyses suggest a reduction to 10 species, with no subspecific designations warranted, to be a more likely estimate of species diversity, namely, M. apiatus, M. browni, M. diastema, M. distans, M. ephippifer, M. fulvius, M. michoacanensis, M. oliveri, M. tener, and one undescribed species.

中文翻译：

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全基因组的SNPs阐明了沿线虫弥漫性物种复合体（Serpentes：Elapidae）的珊瑚蛇的色泽混淆了谱系多样性。

Micrurus属的新世界珊瑚蛇是从北卡罗来纳州到阿根廷不等的有毒且颜色鲜艳的蛇的多样辐射。该组中的物种在拟定和测试关于拟态和养分进化的假设中起着核心作用。尽管它们作为模型系统具有多样性和突出性，但令人惊讶的是，人们对麦克劳斯内的物种边界和系统发育关系知之甚少，这大大阻碍了对其进化史的有意义的分析。在这里，我们将线粒体基因与通过ddRADseq获得的成千上万个核基因组位点一起使用，以研究麦克拉鲁斯属（Micrurus）的一个子系的系统发育关系和种群基因组学：M. diastema种群。我们的结果表明，基于形态和颜色模式的先前物种和物种组推论已严重误导了分类法，并且M. diastema复杂性不是单系的。基于对分子数据的分析，我们推断出物种和种群之间的系统发育关系，并为该群体提供了修订的分类法。识别出两种具有相似颜色模式的非姊妹物种复合体，即M. distans和M. diastema复合体，第一个基于单子藻的Micrurus，第二个包含大多数北美的单子藻的类群。我们检查了所有13个物种及其各自的亚种，从而发现了M. diastema物种复合体中总共24个公认的分类单元。我们的分析表明，应减少到10种，而无需指定任何亚种，以更可能估算物种多样性，