The largest endemic genus in New Caledonia grows: three new species of Pycnandra (Sapotaceae) restricted to ultramafic substrate with updated subgeneric keys

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-08-11 DOI:10.1071/SB21006

U. Swenson, J. Munzinger, Stephan Nylinder, G. Gâteblé

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引用次数: 1

Abstract

Abstract. Pycnandra Benth., a member of subfamily Chrysophylloideae (Sapotaceae), is the largest endemic genus in New Caledonia and is subdivided into six subgenera. It circumscribes 59 species, plus an additional three described here, and nine additional species that remain undescribed for various reasons. We here use nrDNA data of ETS, ITS, and RPB2, analyse it within a Bayesian framework using BEAST, and place the new species in their respective subgenera. Pycnandra perplexa Swenson & Gâteblé is placed in subgenus Achradotypus and given a preliminary IUCN Red List assessment of Near Threatened (NT). It is confined to the ultramafic massif of southern Grande Terre and separated from the similar species P. griseosepala Vink, which is confined to non-ultramafic mountains north of the large southern ultramafic plateau. Pycnandra kopetoensis Munzinger & Swenson and P. margueriteae Munzinger & Swenson are two new micro-endemic species known only from their type localities, where habitats have been destroyed by deforestation, deliberate fires and mining activities. Pycnandra kopetoensis is named after Mount Kopéto, placed in subgenus Leptostylis, and given a preliminary assessment as Critically Endangered (CR). Pycnandra margueriteae is from a small remnant forest near Bourail and categorised as Critically Endangered (CR). Revised identification keys for subgenus Achradotypus, Leptostylis and Pycnandra are provided.

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新喀里多尼亚生长的最大特有属:三种仅限于超基性基质的Pycnandra (sapoaceae)新种，具有更新的亚属键

摘要Pycnandra Benth。，Chrysophylloideae（Sapotaceae）亚科的一员，是新喀里多尼亚最大的特有属，细分为六个亚属。它限定了59个物种，加上这里描述的另外三个物种，以及由于各种原因仍然没有描述的另外九个物种。我们在这里使用ETS、ITS和RPB2的nrDNA数据，使用BEAST在贝叶斯框架内进行分析，并将新物种放在各自的亚属中。Pycnandra comblea Swenson&Gâteblé被归入Achradotypus亚属，并被国际自然保护联盟（IUCN）列入近危（NT）红色名录的初步评估。它局限于Grande Terre南部的超镁铁质地块，并与类似物种P.griseosepala Vink分离，后者局限于大型南部超镁铁质高原以北的非超镁铁质山脉。Pycnandra kopetoensis Munzinger&Swenson和P.margueriteae Munzinger和Swenson是两种新的微特有物种，仅在其类型地区已知，那里的栖息地已被森林砍伐、蓄意火灾和采矿活动破坏。kopetoensis Pycnandra是以Kopéto山命名的，属于Leptostylis亚属，初步评估为极度濒危（CR）。Pycnandra margueriteae来自Bourail附近的一个小的残余森林，被归类为极度濒危（CR）。提供了Achradotypus亚属、Leptostylis亚属和Pycnandra亚属的订正识别密钥。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.