A global phylogenomic study of the Thelypteridaceae

The generic classification of the Thelypteridaceae has been the subject of much controversy. Proposed taxonomic systems have varied from recognizing more than 1000 species in the family within the single genus Thelypteris, to systems favoring upwards of 30 genera. Insights on intrafamilial relationships have been gained from recent phylogenetic studies, especially for the Neotropics; however, in the most recent classification, 10 of 30 recognized genera are either non-monophyletic or untested. In the present study, we sequenced 407 nuclear loci for 621 samples, representing all recognized genera and approximately half the known species diversity. Our phylogenomic results, coupled with morphological study, provide a foundation for a new generic classification. Our recently recognized monophyletic genera demonstrate greater geographic coherence than previous taxonomic concepts suggested. Additionally, our results demonstrate that certain morphological characters, such as frond division, a...

金星蕨科（Thelypteridaceae）的通用分类长期以来颇具争议。此前提出的分类系统跨度极大：一端是将该科全部物种归入单一的金星蕨属（Thelypteris），涵盖逾千个物种；另一端则是支持将其划分为30余个属的分类体系。近期的系统发育研究为厘清该科内的类群亲缘关系提供了重要见解，其中针对新热带区（Neotropics）类群的研究尤为深入；但在最新的分类系统中，已确认的30个属里有10个并非单系群（monophyletic），或是尚未得到系统发育验证。本研究对621份采样样本开展了407个核基因座（nuclear loci）的测序，样本覆盖了该科所有已确认的属以及约半数的已知物种多样性。系统基因组学分析结果结合形态学研究，为构建全新的属级分类体系奠定了坚实基础。我们新近确认的单系属类群，相较于此前的分类概念展现出更强的地理分布一致性。此外，本研究结果还表明，部分形态性状如叶片分裂方式，a...