Integrative species delimitation of Selaginella labordei and closely related species: Uncovering the mysterious identity of S. jugorum and S. tibetica, and description of a new species

doi:10.1002/tax.12800

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	Integrative species delimitation of Selaginella labordei and closely related species: Uncovering the mysterious identity of S. jugorum and S. tibetica, and description of a new species
	Zhang, Meng-Hua ; Zhang, Xian-Chun
刊名	TAXON
	2022
卷号	71 期号:6 页码:1155-1169
关键词	26S rDNA new species pgiC plastid genome Selaginella labordei group species delimitation
ISSN号	0040-0262
DOI	10.1002/tax.12800
文献子类	Article
英文摘要	The taxonomy of Selaginella has been historically problematic due to the indistinguishable morphological characters within species complexes. The S. labordei group contains (S. subg. Stachygynandrum) 4-7 species, distributed from the Himalayas to eastern China. The taxonomy of this group was problematic due to few collections that were available to delimitate S. jugorum and S. tibetica, and large variation of the widely distributed S. labordei in different ecological conditions. Here, we re-evaluate the species delimitation of the S. labordei group using morphological, molecular and cytological data. A total of 55 individuals representing five species of the S. labordei group were investigated using two nuclear markers (26S rDNA, pgiC), one plastid marker (rbcL), as well as 43 plastid-coding sequences obtained from assembled plastid genomes. Five species are recognized based on the phylogenetic analysis of nuclear genes and plastid-coding sequences. The plastid genomes phylogeny showed a good resolution at lower taxonomic levels. All the individuals of the broadly defined S. labordei formed a monophyletic group in our analyses of different datasets. However, samples of S. chrysocaulos were strongly supported as non-monophyletic and were divided into two clades. One clade of S. chrysocaulos is described as a new species, Selaginella parachrysocaulos sp. nov., which is a cryptic species morphologically almost indistinguishable from S. chrysocaulos but with the microspores covered by a honeycomb-like network microstructure. The nuclear pgiC phylogeny and flow cytometry evidence indicate that some individuals of S. parachrysocaulos may be derived from polyploidization. Based on molecular and morphological evidence, S. sichuanica and S. daozhenensis are treated as synonymous to S. labordei, and S. hengduanshanicola to S. tibetica. Our results uncover the previously mysterious affinities of S. jugorum and S. tibetica, which are members of the S. labordei group.
学科主题	Plant Sciences ; Evolutionary Biology
电子版国际标准刊号	1996-8175
出版地	HOBOKEN
WOS关键词	TAXONOMIC REVISION ; CLASSIFICATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	WILEY
WOS记录号	WOS:000851555900001
资助机构	National Natural Science Foundation of China (NSFC) [32170233] ; National Plant Specimen Resource Center Project (NPSRC) [E0117G1001]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28479]
专题	系统与进化植物学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.[Zhang, Meng-Hua 3.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Meng-Hua,Zhang, Xian-Chun. Integrative species delimitation of Selaginella labordei and closely related species: Uncovering the mysterious identity of S. jugorum and S. tibetica, and description of a new species[J]. TAXON,2022,71(6):1155-1169.
APA	Zhang, Meng-Hua,&Zhang, Xian-Chun.(2022).Integrative species delimitation of Selaginella labordei and closely related species: Uncovering the mysterious identity of S. jugorum and S. tibetica, and description of a new species.TAXON,71(6),1155-1169.
MLA	Zhang, Meng-Hua,et al."Integrative species delimitation of Selaginella labordei and closely related species: Uncovering the mysterious identity of S. jugorum and S. tibetica, and description of a new species".TAXON 71.6(2022):1155-1169.