干旱区生态环境知识资源中心(Arid): From the frying pan: an unusual dwarf shrub from Namibia turns out to be a new brassicalean family

Arid

DOI	10.11646/phytotaxa.439.3.1
	From the frying pan: an unusual dwarf shrub from Namibia turns out to be a new brassicalean family
	Swanepoel, Wessel; Chase, Mark W.; Christenhusz, Maarten J. M.; Maurin, Olivier; Forest, Felix; Van Wyk, Abraham E. E.
通讯作者	Van Wyk, AEE
来源期刊	PHYTOTAXA
ISSN	1179-3155
EISSN	1179-3163
出版年	2020
卷号	439 期号:3 页码:171-185
英文摘要	Tiganophyton karasense, an evergreen dwarf shrub, is described as a new species. A new genus and family are also proposed for it in the order Brassicales. Phylogenetic analysis of DNA sequence data indicate that Tiganophyton is sister to Bataceae/Salvadoraceae, and all three sister to Koeberliniaceae. First realized to be undescribed in 2010, T. karasense is a rare species known only from three localities in the arid Karas Region, southern Namibia. These small shrubs grow near the edges of seasonal pans on calcareous substrate underlaid by shales and mudstones of the Prince Albert Formation of the Karoo Supergroup. Morphological characters diagnostic of the new family include: a marked differentiation into long and short shoots; dimorphic, spirally arranged leaves; glucosinolate production; bisexual laterally flattened flowers borne singly in bract axils on short shoots only; tetramerous calyx, corolla and androecium with fused sepals and free, non-clawed petals; a staminal disc, but no nectary glands; deeply bilobed ovary with a gynobasic style; S-shaped gynophore supporting a bilocular, horizontally orientated or inverted ovary; two ovules per locule; and a dry, persistent fruit, provisionally interpreted as a one-seeded nutlet. Based on IUCN Red List categories and criteria, a conservation assessment of Vulnerable (VU D1) is recommended for Tiganophyton karasense.
英文关键词	Bataceae Brassicales Koeberliniaceae limestone mudstone seasonal pans Karoo Supergroup endemism Karas Region Salvadoraceae taxonomy Tiganophytaceae Tiganophyton
类型	Article
语种	英语
开放获取类型	Bronze, Green Published
收录类别	SCI-E
WOS记录号	WOS:000528726800001
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324363
作者单位	[Swanepoel, Wessel] POB 21168, Windhoek, Namibia; [Swanepoel, Wessel; Van Wyk, Abraham E. E.] Univ Pretoria, Dept Plant & Soil Sci, HGWJ Schweickerdt Herbarium, ZA-0002 Pretoria, South Africa; [Chase, Mark W.; Christenhusz, Maarten J. M.; Maurin, Olivier; Forest, Felix] Royal Bot Gardens, Richmond TW9 3AE, Surrey, England; [Chase, Mark W.; Christenhusz, Maarten J. M.] Curtin Univ, Dept Environm & Agr, Perth, WA, Australia; [Van Wyk, Abraham E. E.] South African Natl Biodivers Inst, Private Bag X101, ZA-0001 Pretoria, South Africa
推荐引用方式 GB/T 7714	Swanepoel, Wessel,Chase, Mark W.,Christenhusz, Maarten J. M.,et al. From the frying pan: an unusual dwarf shrub from Namibia turns out to be a new brassicalean family[J],2020,439(3):171-185.
APA	Swanepoel, Wessel,Chase, Mark W.,Christenhusz, Maarten J. M.,Maurin, Olivier,Forest, Felix,&Van Wyk, Abraham E. E..(2020).From the frying pan: an unusual dwarf shrub from Namibia turns out to be a new brassicalean family.PHYTOTAXA,439(3),171-185.
MLA	Swanepoel, Wessel,et al."From the frying pan: an unusual dwarf shrub from Namibia turns out to be a new brassicalean family".PHYTOTAXA 439.3(2020):171-185.