Phylogenetic position of South American Cheilanthes (Cheilanthoideae, Pteridaceae): Advances in the generic circumscription and segregation of the new genus Mineirella,Journal of Systematics and Evolution

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Phylogenetic position of South American Cheilanthes (Cheilanthoideae, Pteridaceae): Advances in the generic circumscription and segregation of the new genus Mineirella
Journal of Systematics and Evolution ( IF 3.4 ) Pub Date : 2020-12-28 , DOI: 10.1111/jse.12723
M. Mónica Ponce ₁ , M. Amalia Scataglini ₁

Affiliation

This analysis corroborates and expands our previous results regarding the phylogenetic position of Cheilanthes species from South America. We sequenced three plastid genetic regions, one genic (rbcL) and two genic plus intergenic spacers (trnL + trnL-F and rps4 + rps4-trnS) from 25 South American cheilanthoid species. This allowed us to elucidate phylogenetic relationships that have been historically unresolved or were lowly supported. Here, we analyzed 45 Cheilanthes species (23 from South America) and circumscribed Cheilanthes s.s. in a strongly supported clade that contains three subclades: (i) exclusively from South America, (ii) from Australasia + South America, and (iii) from Africa. The position of three South American species, previously referred to the informal “Cheilanthes geraniifolia group”, is confirmed as a highly supported group outside Cheilanthes s.s. and within the Adiantopsis–Doryopteris clade. This group is described here as the new genus Mineirella. The new combinations for the genus and illustrations are included. Additionally, we discuss the morphological innovations that provide evidence to support the different clades.

中文翻译：

南美雪兰花（雪兰花科，蕨科）的系统发育位置：Mineirella新属的属界限和分离研究进展

该分析证实并扩展了我们之前关于南美洲Cheilanthes物种系统发育位置的结果。我们对来自 25 个南美螯虾物种的三个质体遗传区域、一个基因 ( rbcL ) 和两个基因加基因间隔区 ( trnL + trnL-F和rps4 + rps4-trnS ) 进行了测序。这使我们能够阐明历史上未解决或支持率低的系统发育关系。在这里，我们分析了 45 个Cheilanthes物种（23 个来自南美洲）并限制了Cheilanthesss 在一个强烈支持的进化枝中，它包含三个子进化枝：（i）完全来自南美洲，（ii）来自大洋洲 + 南美洲，和（iii）来自非洲。三个南美洲物种的位置，以前称为非正式的“天竺葵组”，被确认为在Cheilanthes ss 之外和Adiantopsis-Doryopteris进化枝内的高度支持的群体。该组在这里被描述为新属Mineirella。包括属和插图的新组合。此外，我们讨论了为支持不同进化枝提供证据的形态学创新。

更新日期：2020-12-28

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