Afrothismia ugandensis nom. nov. (Afrothismiaceae), Critically Endangered and endemic to Budongo Central Forest Reserve, Uganda

IF 0.9 4区生物学 Q4 PLANT SCIENCES

Kew Bulletin Pub Date : 2024-08-15 DOI:10.1007/s12225-024-10212-5

Martin Cheek, Roy E. Gereau, James Kalema

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Abstract

The fully mycotrophic (or mycoheterophic) Afrothismia ugandensis Cheek nom. nov. (Afrothismiaceae), formerly described as A. winkleri (Engl.) Schltr. var. budongensis Cowley from the Budongo Forest in Western Uganda, is renamed, redescribed and illustrated. This change in status is supported by eight newly elucidated, qualitative, morphological, diagnostic characters despite the overall similarity with A. winkleri, a species restricted to Cameroon and Gabon. Afrothismia ugandensis is remarkable in the genus for occurring in semi-deciduous (not evergreen) forest and for having ellipsoid or ovoid (vs globose) root bulbils. It has only been recorded twice, first in August 1940, and most recently in June 1998, despite targeted searches in recent years. In both 1940 and 1998, only single individuals appear to have been detected. A single site for the species is known with certainty. It is here assessed as Critically Endangered [CR B2ab(iii); D1] using the IUCN categories and criteria. A. ugandensis is threatened by forest degradation and clearance due to illegal, selective, small-holder logging for firewood and charcoal, timber and limited agriculture.

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Afrothismia ugandensis nom.

之前被描述为 A. winkleri (Engl.) Schltr.尽管与 A. winkleri（一种局限于喀麦隆和加蓬的物种）总体相似，但这一地位的改变得到了八个新阐明的定性形态学诊断特征的支持。在该属中，Afrothismia ugandensis 的显著特点是生长在半落叶（非常绿）森林中，且根部鳞茎呈椭圆形或卵球形（相对于球形）。尽管近年来对其进行了有针对性的搜寻，但它只被记录过两次，第一次是在 1940 年 8 月，最近一次是在 1998 年 6 月。在 1940 年和 1998 年，似乎都只发现了单个个体。该物种只有一个地点可以确定。根据世界自然保护联盟的分类和标准，该物种被评定为极危物种[CR B2ab(iii)；D1]。由于非法、选择性、小农伐木以获取木柴和木炭、木材以及有限的农业生产，乌干达羚正受到森林退化和砍伐的威胁。

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来源期刊

Kew Bulletin PLANT SCIENCES-

CiteScore

1.70

自引率

22.20%

发文量

期刊介绍： Kew Bulletin is an international peer-reviewed journal for the taxonomy, systematics and conservation of vascular plants and fungi. Papers on conservation, evolution, palynology, cytology, anatomy, biogeography and phytochemistry are considered, where relevant to taxonomy and systematics. Review papers on topics appropriate to the journal are invited. The journal is richly illustrated with line drawings and photographs, and also features a Book Review and Notices section. Four parts (c. 640 pp) are published each year.