Central America is largely covered by hyperdiverse, yet poorly understood, rain forests. Understorey palms are diverse components of these forests, but little is known about their historical assembly. It is not clear when palms in Central America reached present diversity levels and whether most species arrived from neighbouring regions or evolved locally. We addressed these questions using the most species-rich American palm clades indicative of rain forests. We reconstructed and compared their phylogenomic and biogeographical history with the diversification of 54 other plant lineages, to gain a better understanding of the processes that shaped the assembly of Central American rain forests.

中文翻译：

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中美洲林下棕榈的近期和当地多样化

中美洲主要被高度多样化但知之甚少的热带雨林所覆盖。下层棕榈树是这些森林的不同组成部分，但对它们的历史组合知之甚少。目前尚不清楚中美洲的棕榈树何时达到目前的多样性水平，以及大多数物种是来自邻近地区还是在当地进化。我们使用指示雨林的物种最丰富的美国棕榈枝来解决这些问题。我们重建并比较了它们的系统发育和生物地理历史与 54 种其他植物谱系的多样化，以更好地了解塑造中美洲热带雨林的过程。