Muasya A Muthama, Larridon Isabel
Department of Biological Sciences, Bolus Herbarium, University of Cape Town, Rondebosch, Cape Town, South Africa.
Identification and Naming, Royal Botanic Gardens Kew, Richmond, Surrey, UK.
PeerJ. 2021 Jan 26;9:e10737. doi: 10.7717/peerj.10737. eCollection 2021.
Generic delimitations in the Ficinia Clade of tribe Cypereae are revisited. In particular, we aim to establish the placement of annual species currently included in of which the phylogenetic position is uncertain. Phylogenetic inference is based on two nuclear markers (ETS, ITS) and five plastid markers (the genes , , and , the intron and spacer) data, analyzed using model based methods. Topologies based on nuclear and plastid data show incongruence at the backbone. Therefore, the results are presented separately. The monophyly of the smaller genera (, , , , ) is confirmed. However, is paraphyletic as is retrieved as one of its clades. Furthermore, is paraphyletic if and allies are excluded. We take a pragmatic approach based on the nuclear topology, driven by a desire to minimize taxonomic changes, to recircumscribe to include the annual species characterized by cartilaginous glumes and formally include all the species inferred outside the core clade. Consequently, the circumscription of is narrowed to encompass only those species retrieved as part of the core clade. Five new combinations are made (). We present nomenclatural summary at genus level, identification keys and diagnostic features.
重新审视莎草科刺子莞族费氏草属的类属界定。具体而言，我们旨在确定目前归入费氏草属的一年生物种的分类位置，其系统发育位置尚不确定。系统发育推断基于两个核标记（ETS、ITS）和五个质体标记（基因rbcL、matK、trnL-F、trnS-G和trnL内含子以及trnL-trnF间隔区）数据，采用基于模型的方法进行分析。基于核数据和质体数据的拓扑结构在主干部分显示出不一致。因此，结果分别呈现。较小属（Ficinia、Koyamaea、Neomartinella、Pleurostachys、Remirea）的单系性得到确认。然而，Ficinia是并系的，因为Remirea被检索为其一个分支。此外，如果排除Remirea及其近缘属，Ficinia也是并系的。我们基于核拓扑结构采取务实的方法，出于尽量减少分类学变化的愿望，重新界定Ficinia，以包括以软骨颖片为特征的一年生Ficinia物种，并正式纳入所有推断在核心Ficinia分支之外的Ficinia物种。因此，Ficinia的范围缩小到仅包括那些作为核心Ficinia分支一部分被检索到的物种。做出了五个新组合（Ficinia benguellensis、Ficinia brittoniana、Ficinia corymbosa、Ficinia eckloniana、Ficinia humbertiana）。我们给出了属级别的命名总结、鉴定检索表和诊断特征。
