Morphological and Molecular Characterization of Five Species Including Three New Species of Golden Gorgonians (Cnidaria: Octocorallia) from Seamounts in the Western Pacific

doi:10.3390/biology10070588

	Morphological and Molecular Characterization of Five Species Including Three New Species of Golden Gorgonians (Cnidaria: Octocorallia) from Seamounts in the Western Pacific
	Xu, Yu1,2,3 ; Zhan, Zifeng 1; Xu, Kuidong1,2,3
	2021-07-01
发表期刊	BIOLOGY-BASEL
卷号	10 期号:7 页码:27
通讯作者	Xu, Kuidong(kxu@qdio.ac.cn)
摘要	Simple Summary Deep-water octocorals are main components of vulnerable marine ecosystems (VMEs) and play an important role in conservation and research. Iridogorgia Verill, 1883 is a distinct octocoral group characterized by a remarkably spiral structure and large size in deep sea, where the diversity of Iridogorgia is poorly known in the Western Pacific. Based on the collection of Iridogorgia specimens from seamounts in the tropical Western Pacific, we described five species including three new species using an integrated morphological-molecular approach. We assessed the potential of the mitochondrial genes MutS and COI, and the nuclear 28S rDNA for species delimitation and phylogenetic reconstruction of Iridogorgia. The results suggest that the mitochondrial markers are not able to resolve the species boundaries and deeply divergent relationships adequately, while 28S rDNA showed potential application in DNA barcoding and phylogenetic reconstruction for this genus. This study will help to understand the Iridogorgia biodiversity in the Western Pacific and shed more light on the screening of barcodes for octocorals. Members of genus Iridogorgia Verrill, 1883 are the typical deep-sea megabenthos with only seven species reported. Based on an integrated morphological-molecular approach, eight sampled specimens of Iridogorgia from seamounts in the tropical Western Pacific are identified as three new species, and two known species I. magnispiralis Watling, 2007 and I. densispicula Xu, Zhan, Li and Xu, 2020. Iridogorgia flexilis sp. nov. is unique in having a very broad polyp body base with stout and thick scales. Iridogorgia densispiralis sp. nov. can be distinguished by rods present in both polyps and coenenchyme, and I. verrucosa sp. nov. is characterized by having numerous verrucae in coenenchyme and irregular spindles and scales in the polyp body wall. Phylogenetic analysis based on the nuclear 28S rDNA indicated that I. densispiralis sp. nov. showed close relationships with I. splendens Watling, 2007 and I. verrucosa sp. nov., and I. flexilis sp. nov. formed a sister clade with I. magnispiralis. In addition, due to Rhodaniridogorgia fragilis Watling, 2007 nested into the Iridogorgia clade in mtMutS-COI trees and shared highly similar morphology to the latter, we propose to eliminate the genus Rhodaniridogorgia by establishing a new combination Iridogorgia fragilis (Watling, 2007) comb. nov. and resurrecting I. superba Nutting, 1908.
关键词	Anthozoa Chrysogorgiidae Iridogorgia flexilis Iridogorgia verrucosa Iridogorgia densispiralis taxonomy morphology phylogeny
DOI	10.3390/biology10070588
收录类别	SCI
语种	英语
资助项目	Key Program of National Natural Science Foundation of China[41930533] ; Science & Technology Basic Resources Investigation Program of China[2017FY100804] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Senior User Project of RV KEXUE[KEXUE2018G27] ; Senior User Project of RV KEXUE[E12414101Q]
WOS研究方向	Life Sciences & Biomedicine - Other Topics
WOS类目	Biology
WOS记录号	WOS:000678171800001
出版者	MDPI
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/337002/175914
专题	海洋生物分类与系统演化实验室
通讯作者	Xu, Kuidong
作者单位	1.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, Lab Marine Organism Taxon & Phylogeny,Shandong Pr, Qingdao 266071, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋大科学研究中心
通讯作者单位	中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Xu, Yu,Zhan, Zifeng,Xu, Kuidong. Morphological and Molecular Characterization of Five Species Including Three New Species of Golden Gorgonians (Cnidaria: Octocorallia) from Seamounts in the Western Pacific[J]. BIOLOGY-BASEL,2021,10(7):27.
APA	Xu, Yu,Zhan, Zifeng,&Xu, Kuidong.(2021).Morphological and Molecular Characterization of Five Species Including Three New Species of Golden Gorgonians (Cnidaria: Octocorallia) from Seamounts in the Western Pacific.BIOLOGY-BASEL,10(7),27.
MLA	Xu, Yu,et al."Morphological and Molecular Characterization of Five Species Including Three New Species of Golden Gorgonians (Cnidaria: Octocorallia) from Seamounts in the Western Pacific".BIOLOGY-BASEL 10.7(2021):27.

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