Morphology and molecular phylogeny of Pleurosigma pacificum sp. nov. (Pleurosigmataceae), a new tropical pelagic species from the Western Pacific Ocean

doi:10.3897/phytokeys.227.103890

	Morphology and molecular phylogeny of Pleurosigma pacificum sp. nov. (Pleurosigmataceae), a new tropical pelagic species from the Western Pacific Ocean
	Du, Fei-Chao 1,2; Li, Yu-Hang 1; Xu, Kui-Dong1,2,3
	2023-06-02
发表期刊	PHYTOKEYS
ISSN	1314-2011
期号	227 页码:99-108
通讯作者	Xu, Kui-Dong([email protected])
摘要	A new species of pelagic diatom, Pleurosigma pacificum sp. nov., is described from the trop-ical Western Pacific Ocean. It has the typical features of Pleurosigma, including a slightly sigmoid raphe, intersected transverse and oblique striae, and loculate areolae with external opening slits and internal poroids. Morphologically, P. pacificum belongs to a species group of Pleurosigma with lanceolate valves, including P. atlanticum Heiden & Kolbe, P. nubecula W. Smith, P. indicum Simonsen, and P. simonsenii Hasle. However, P. pacificum differs by its smaller lanceolate valve and smaller intersection angle as well as elliptical areolae without a silica bar. The SSU rDNA and rbcL sequence data place P. pacificum in a basal position rel-ative to other species of Pleurosigma. Our molecular phylogenetic analyses did not support the monophyly of lanceolate and slightly sigmoid species. Thus, the sigmoidality of valve outline cannot be considered as a criterion to define the species group.
关键词	Marine diatoms morphology new species phylogeny Pleurosigma Western Pacific Ocean
DOI	10.3897/phytokeys.227.103890
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42276099]; National Natural Science Foundation of China[31800171]; Oceanographic Data Center, Institute of Oceanology, Chinese Academy of Sciences
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001012843100002
出版者	PENSOFT PUBLISHERS
WOS关键词	BACILLARIOPHYCEAE ; EVOLUTION ; MARINE
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182371
专题	海洋生物分类与系统演化实验室
通讯作者	Xu, Kui-Dong
作者单位	1.Chinese Acad Sci, Qingdao Key Lab Marine Biodivers & Conservat, Lab Marine Organism Taxon & Phylogeny, Inst Oceanol,Shandong Prov Key Lab Expt Marine Bio, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Du, Fei-Chao,Li, Yu-Hang,Xu, Kui-Dong. Morphology and molecular phylogeny of Pleurosigma pacificum sp. nov. (Pleurosigmataceae), a new tropical pelagic species from the Western Pacific Ocean[J]. PHYTOKEYS,2023(227):99-108.
APA	Du, Fei-Chao,Li, Yu-Hang,&Xu, Kui-Dong.(2023).Morphology and molecular phylogeny of Pleurosigma pacificum sp. nov. (Pleurosigmataceae), a new tropical pelagic species from the Western Pacific Ocean.PHYTOKEYS(227),99-108.
MLA	Du, Fei-Chao,et al."Morphology and molecular phylogeny of Pleurosigma pacificum sp. nov. (Pleurosigmataceae), a new tropical pelagic species from the Western Pacific Ocean".PHYTOKEYS .227(2023):99-108.