Molecular phylogenetic studies focused on the early-branching papilionoid legumes have revealed many new clades and supported several generic realignments, yet the monophyly of some of the constituent genera has remained unassessed. This is the case for the Amazonian genus Clathrotropis of the tribe Ormosieae. The genus, as traditionally circumscribed, comprises seven species of trees, including some of the most ecologically hyper dominant taxa across the Amazonian terra firme and seasonally flooded forests. Here we employed a Bayesian analysis of densely sampled nuclear ribosomal ITS/5.8S and plastid matK and trnL intron DNA sequences to evaluate the monophyly of Clathrotropis. All individual and concatenated analyses concurred in showing the non-monophyletic nature of Clathrotropis, whose species fall into three distantly related lineages: one, comprised of C. brachypetala, C. brunnea, C. glaucophylla and the ecologically dominant C. macrocarpa, is circumscribed here as the new genus Cabari; the two others, comprising C. paradoxa and the widespread C. nitida, are more closely related to Spirotropis of the tribe Ormosieae. Such phylogeny-based dismemberment of Clathrotropis is further supported by vegetative, floral, fruit, and seed characters. Although the genes analysed in this study have provided phylogenetically informative data supporting the need for a new circumscription of Clathrotropis, we suggest that future phylogenomic studies should seek to better resolve the relationships of the newly described genus Cabari across the phylogenetically recalcitrant early-branching nodes of the Genistoid clade.

中文翻译：

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蝶形花豆科植物早期分支的 Genistoid 谱系的分子系统发育揭示了从 Clathrotropis 中分离出来的一个新的亚马逊属

专注于早期分枝蝶形豆科植物的分子系统发育研究揭示了许多新的分支并支持了一些属的重新排列，但一些组成属的单系性仍未得到评估。亚马逊 Ormosieae 部落的 Clathrotropis 属就是这种情况。按照传统的界定，该属由七种树木组成，其中包括亚马逊地区和季节性洪水森林中一些生态上最具优势的类群。在这里，我们对密集采样的核核糖体 ITS/5.8S 和质体 matK 和 trnL 内含子 DNA 序列进行贝叶斯分析，以评估 Clathrotropis 的单系性。所有个体分析和串联分析都一致表明 Clathrotropis 具有非单系性质，其物种分为三个远缘相关的谱系：其中一个谱系由 C. brachypetala、C. brunnea、C. glaucophylla 和生态上占主导地位的 C. macrocarpa 组成，受到限制这里称为新属Cabari；另外两种，包括 C. paradoxa 和广泛分布的 C. nitida，与 Ormosieae 部落的 Spirotropis 关系更密切。这种基于系统发育的 Clathrotropis 分解得到了营养、花、果实和种子特征的进一步支持。尽管本研究中分析的基因提供了系统发育信息数据，支持对 Clathrotropis 进行新的界定，但我们建议未来的系统发育组学研究应寻求更好地解决新描述的 Cabari 属在系统发育上顽固的早期分支节点之间的关系。 Genistoid分支。