Integrating UCE Phylogenomics With Traditional Taxonomy Reveals a Trove of New World Syscia Species (Formicidae: Dorylinae)
Integrating UCE Phylogenomics With Traditional Taxonomy Reveals a Trove of New World Syscia Species (Formicidae: Dorylinae)
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DOI：
10.1093/isd/ixab001
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发表时间：
2021-03-05
影响因子：
3.4
通讯作者：
Branstetter, Michael G.
中科院分区：
文献类型：
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作者：
Longino, John T.;Branstetter, Michael G.
蚁属Syscia Roger，1861是生活在亚洲和美洲热带落叶层和朽木中的隐蔽蚁群的一部分。这是一个独特的林间空地内的Dorylinae，从军队蚂蚁的亚科出现。在这项工作之前，该属包括七个物种，每个物种都来自单一或很少的收集。在中美洲的广泛收集揭示了形态形式的意想不到的和具有挑战性的多样性。当地不同的形式可以确定在许多网站，但分配标本的物种跨越多个网站是有问题的。为了改善物种界定，超保守元件（UCE）的基因组数据进行测序的所有形式，无论是内部和之间的网站，并推断出一个同源性。由单系发生学可知，物种的划分是基于单系性，没有林内同域性，以及主观程度的形态一致性。130个标本的UCE测序基因组结果通过线粒体COI（DNA条形码）数据分析得到补充，用于扩展分类单元集。由此产生的分类学将新大陆的已知物种从3种增加到57种。我们描述并命名了31个新种，其中23个种被指定为形态种代码，以提高标本覆盖率。女王可能是完全有翅或短翅的，并且有各种各样的跨种姓女性形式。由于远缘种间性状变异的连续性和高度相似性，单靠形态学的鉴定是非常困难的。以一套分布图和标准视图的形式提供了识别辅助工具，并按大小对物种进行排序。
The ant genus Syscia Roger, 1861 is part of the cryptic ant fauna inhabiting leaf litter and rotten wood in the Asian and American tropics. It is a distinct Glade within the Dorylinae, the subfamily from which army ants arose. Prior to this work, the genus comprised seven species, each known from a single or very few collections. Extensive collecting in Middle America revealed an unexpected and challenging diversity of morphological forms. Locally distinct forms could be identified at many sites, but assignment of specimens to species spanning multiple sites was problematic. To improve species delimitation, Ultra-Conserved Element (UCE) phylogenomic data were sequenced for all forms, both within and among sites, and a phylogeny was inferred. Informed by phylogeny, species delimitation was based on monophyly, absence of within-Glade sympatry, and a subjective degree of morphological uniformity. UCE phylogenomic results for 130 specimens were complemented by analysis of mitochondrial COI (DNA barcode) data for an expanded taxon set. The resulting taxonomy augments the number of known species in the New World from 3 to 57. We describe and name 31 new species, and 23 species are assigned morphospecies codes pending improved specimen coverage. Queens may be fully alate or brachypterous, and there is a wide variety of intercaste female forms. Identification based on morphology alone is very difficult due to continuous character variation and high similarity of phylogenetically distant species. An identification aid is provided in the form of a set of distribution maps and standard views, with species ordered by size.