Notes on the genus Usnea Adans. (lichenized Ascomycota, Parmeliaceae) from the islands of São Tomé and Príncipe in tropical West Africa

IF 1.6 4区生物学 Q4 MYCOLOGY

Lichenologist Pub Date : 2022-09-01 DOI:10.1017/S0024282922000238

M. R. Nadel, P. Clerc

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Abstract

Abstract An investigation of the genus Usnea, in the biodiversity hotspot of the Republic of São Tomé and Príncipe in tropical West Africa, is presented here. Fifteen species, or species aggregates, were recorded for the islands: Usnea articulata aggr., Usnea baileyi (Stirt.) Zahlbr., Usnea beckeri P. Clerc & Nadel, Usnea bicolorata Motyka, Usnea erinacea aggr., Usnea exasperata (Müll. Arg.) Motyka, Usnea firmula (Stirt.) Motyka, Usnea krogiana P. Clerc, Usnea longiciliata P. Clerc & Nadel, Usnea nodulosa Swinscow & Krog, Usnea pectinata aggr., Usnea sorediosula Motyka, Usnea submollis J. Steiner, and two undetermined species. Two species of lichen are described as new to science: U. beckeri and U. longiciliata. Both species are characterized by a dense and brittle, dark green thallus, the presence of apothecia surrounded by long cilia-like fibrils, a lack of soredia, and the presence of two unknown substances; however, whereas U. beckeri has a pendant growth form and can reach 25 cm in length, U. longiciliata is differentiated by a shrubby growth form of less than 6 cm. These two species also have different ascospore dimensions. A molecular phylogenetic analysis is presented that lends support to their description as new species. Additionally, Usnea krogiana is noted as new to continental Africa and nine Usnea species or aggregates are noted as new to the Islands of São Tomé and Príncipe in the Gulf of Guinea.

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标题乌松属植物注释。（地衣化子囊菌门，Parmeliaceae）产于西非热带的圣多美和普林西比岛

摘要对西非热带地区 o tom共和国和Príncipe生物多样性热点地区的Usnea属植物进行了调查。在岛屿上记录到15种或物种聚集体:Usnea articulata aggr;(美国)Zahlbr。， Usnea beckeri P. Clerc & Nadel, Usnea bicolorata Motyka, Usnea erinacea aggr。[美];[美];参数)。莫提卡，Usnea firmula (Stirt)Motyka, Usnea krogiana P. Clerc, Usnea longiciliata P. Clerc & Nadel, Usnea nodulosa Swinscow & Krog, Usnea pectinata aggr。， Usnea sorediosula Motyka, Usnea submollis J. Steiner和2个未定种。两种地衣被描述为科学上的新物种:贝氏衣和长毛衣。这两种植物的特点都是:浓密而脆的深绿色菌体，被长长的纤毛状原纤维包围的药囊，缺乏胚芽，以及两种未知物质的存在;然而，贝氏菌的生长形态为垂状，长度可达25 cm，而长毛菌的生长形态为灌木状，长度小于6 cm。这两个物种也有不同的子囊孢子尺寸。分子系统发育分析提供了支持它们作为新物种的描述。此外，在非洲大陆被认为是新发现的Usnea krogiana，在几内亚湾的s o tom岛和Príncipe岛被认为是新发现的9个Usnea物种或聚集体。

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来源期刊

Lichenologist 生物-真菌学

CiteScore

2.90

自引率

14.30%

发文量

审稿时长

6.0 months

期刊介绍： The Lichenologist is the premier scientific journal devoted exclusively to the study of lichens worldwide. As the leading forum for the dissemination of new concepts and topical reviews, The Lichenologist reaches more scientists concerned with the study of lichens and lichen symbionts than any other single journal. All aspects of lichenology are considered including systematics and phylogenetics; molecular biology; ultrastructure, anatomy and morphology; secondary chemistry, effects of pollutants and use as bioindicators; biogeography. In addition to standard length research papers, the journal also publishes Short Communications and Book Reviews. A monthly issue may occasionally be devoted to papers deriving from a symposium.