Phylogenetic Placement and Taxonomic Revision of the Genus Monochilus (Lamiaceae), a Rare Brazilian Endemic

IF 0.9 3区生物学 Q4 EVOLUTIONARY BIOLOGY

Systematic Botany Pub Date : 2022-12-12 DOI:10.1600/036364422X16674054154188

G. Antar, Mallory Hays, R. Harley, B. Drew

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引用次数: 1

Abstract

Abstract Monochilus (Lamiaceae) is an enigmatic genus endemic to Brazil with two rarely collected species currently recognized. Based on morphological features Monochilus is hypothesized to be closely related to Amasonia within subfamily Ajugoideae. However, Monochilus is one of the few genera within Lamiaceae never to be represented in a published molecular phylogenetic study, and thus has an uncertain placement with the subfamily. During recent herbarium exploration in association with the Flora of Brasil 2020 project, new specimens of Monochilus gloxinifolius and M. obovatus were uncovered. Based on this material, a new phylogeny of Ajugoideae was constructed based on nuclear ribosomal ITS and chloroplast matK and trnL-trnF markers. Monochilus, as previously hypothesized, is closely related to Amasonia and placed within Ajugoideae. We discuss the phylogenetic placement of the genus and provide a taxonomic revision with description, distribution maps, an identification key, preliminary conservation assessments, photographic plates, and comments on both the taxonomy and ecology of these two species. Additionally, we provide a lectotypification for M. gloxinifolius.

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巴西罕见特有种单紫苣苔属的系统发育定位与分类修正

摘要单核属（Lamiaceae）是巴西特有的一个神秘属，目前已知有两种罕见的物种。根据形态学特征，单核目被认为与阿朱亚科中的Amasonia密切相关。然而，单核属是Lamiaceae中为数不多的从未在已发表的分子系统发育研究中出现过的属之一，因此在亚科中的位置不确定。在最近与《巴西植物志2020》项目相关的植物标本馆探索中，发现了球叶单核菌和倒卵圆线虫的新标本。在此基础上，基于核核糖体ITS、叶绿体matK和trnL-trnF标记构建了一个新的Ajugoideae的系统发生学。如先前所假设的，单核门与阿玛索尼亚亲缘关系密切，并位于阿朱总科内。我们讨论了该属的系统发育位置，并提供了分类学修订，包括描述、分布图、鉴定钥匙、初步保护评估、照片板以及对这两个物种的分类学和生态学的评论。此外，我们还为金合欢提供了一个选型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Systematic Botany 生物-进化生物学

CiteScore

1.80

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Systematic Botany Monographs is a series of peer-reviewed taxonomic monographs and revisions published the American Society of Plant Taxonomists. ISSN 0737-8211, ISBN prefix 978-0-912861. No; volumes of Systematic Botany Monographs must be ordered separately. ASPT membership inludes only a subscription to the quarterly journal Systematic Botany. SBM is supported by sales, author"s subsidies, and donations.