China Seas are one of the most diverse regions in the Pacific. Though much eff ort has been made to explore its biodiversity, the polychaetes diversity is still poorly known. A large number of species records are base...China Seas are one of the most diverse regions in the Pacific. Though much eff ort has been made to explore its biodiversity, the polychaetes diversity is still poorly known. A large number of species records are based on ecological investigation rather than taxonomical studies. We update the Polychaete species taxonomicaly described from China coastal waters during 2008–2017 and list them as a catalogue. The catalogue contains 47 species of 32 genera and 17 families, the type depository, type locality and geographic distribution. Some taxonomic problems are present in remarks.展开更多
The genus Rhynchospio has fronto-lateral horns on prostomium,paired branchiae from chaetiger 2 to near the posterior end,capillary notochaetae only,and more than two pairs of pygidial cirri.Rhynchospio species are com...The genus Rhynchospio has fronto-lateral horns on prostomium,paired branchiae from chaetiger 2 to near the posterior end,capillary notochaetae only,and more than two pairs of pygidial cirri.Rhynchospio species are common in coastal soft bottom communities;nevertheless,many recorded Rhynchospio specimens around the world are currently undescribed.Here we described a Rhynchospio species based on specimens collected from Qingdao,China.Comparison with the reported DNA sequences of four gene markers(16S rRNA,18S rRNA,28S rRNA,and Histone H3)and brief morphological description of specimens collected from Jinhae Bay,South Korea,previously reported as Rhynchospio aff.asiatica,indicated that they are conspecific.Morphologically,specimens of R.aff.asiatica from Qingdao are characterized by having neuropodial hooded hooks from chaetigers 14–17(vs.10–23 in R.asiatica)to near pygidial chaetigers,sperm from chaetiger 11 to 14(vs.from chaetiger 11 to 21–22 in R.asiatica),oocytes from chaetigers 16–17 to 26–39(vs.from 22–24 in R.asiatica),and 4–6(vs.up to 6 in R.asiatica)pygidial cirri.Genetically,Rhynchospio aff.asiatica is most closely related to R.arenincola Hartman,1936 from California,USA with the interspecific distances of 20.02%(16S rRNA),4.50%(18S rRNA),8.44%(28S rRNA),2.74%(Histone H3),and 6.10%(concatenated sequences).Water flow across the dorsum created by ciliary beating of the branchiae and nototrochs,observed on live specimens,may help transport gametes from reproductive segments in anterior and middle parts to the posterior brooding segments.Phylogenetic trees based on concatenated sequences of four gene markers of 54 spioniform species in 25 genera revealed two clades,covering the two subfamilies Spioninae and Nerininae respectively.Two families(i.e.,Poecilochaetidae and Trochochaetidae)in the order Spionida were clustered within Spionidae,supporting a morphology-based proposal that these families bearing a pair of prehensile,grooved palps should be grouped within a more broadly defi ned family Spionidae.Mapping morphological and reproductive characteristics to the phylogenetic trees indicated that the ancestor of spionids might lack branchiae,broadcast spawn thick-envelop oocytes and ect-aquasperm,and produce planktotrophic larvae.展开更多
深海多毛类环节动物的多样性与地理分布格局是深海生物多样性研究关注的焦点问题之一。基于海洋生物地理信息系统(Ocean Biogeographic Information System,OBIS)数据库中的公开数据分析了西太平洋深海底栖多毛类动物的多样性与地理分...深海多毛类环节动物的多样性与地理分布格局是深海生物多样性研究关注的焦点问题之一。基于海洋生物地理信息系统(Ocean Biogeographic Information System,OBIS)数据库中的公开数据分析了西太平洋深海底栖多毛类动物的多样性与地理分布格局。多毛类数据多分布于靠近临海国的海沟、海山等显著地貌区,共记录到51个科318个物种,其中,多鳞虫科是物种多样性最高的科,且具有最大的深度分布范围。深海底栖多毛类物种数量随着水深增加而下降,但在2500~3000 m水深处以及4000~4500 m水深处略增多。分析显示深海底栖多毛类的特有性水平较高,在热液口环境,形成了以热液口特有种为特征的底栖多毛类动物区系。西太平洋深海底栖多毛类动物分布可划分为4类生物地理区:日本海生物地理区域、以相模湾为代表的靠近大陆的生物地理区域、以深海热液口为典型特征的生物地理区域(冲绳海槽、马努斯盆地、斐济海盆区)以及以深海海沟、平原(日本海槽-千岛-堪察加海沟区、澳大利亚东侧区、新西兰区)为特征的生物地理区域。展开更多
Ataxonomic survey of benthic marine animals from coastal regions of Hainan Island, South China Sea, revealed specimens of a new species of Eunice (Polychaeta: Eunicida: Eunicidae), Eunice uschakovi n. sp., collected f...Ataxonomic survey of benthic marine animals from coastal regions of Hainan Island, South China Sea, revealed specimens of a new species of Eunice (Polychaeta: Eunicida: Eunicidae), Eunice uschakovi n. sp., collected from the intertidal zone. The species belongs to the group of Eunice that has yellow tridentate subacicular hooks and branchiae scattered over an extensive region of the body. It resembles E. miurai and E. havaica in having both bidentate and tridentate falcigers, but can be readily distinguished by branchial features. Comparisons between E. uschakovi and the two related species are presented.展开更多
A taxonomic study of Hyalinoecia species based on the materials deposited in the Marine Biological Museum of the Chinese Academy of Sciences （MBMCAS） yielded two species： Hyalinoecia tubicola （MOiler, 1776） and H...A taxonomic study of Hyalinoecia species based on the materials deposited in the Marine Biological Museum of the Chinese Academy of Sciences （MBMCAS） yielded two species： Hyalinoecia tubicola （MOiler, 1776） and H. papillata Imajima, 1999. Both species were collected from the sandy bottoms in the northern South China Sea. Hyalinoecia tubicola is widely distributed from the coast of Guangdong Province southwards to the Xisha Islands. Hyalinoecia papillata is reported for the first time in the South China Sea. It differs from H. tubicola in having a prolonged, tongue-like prechaetal lobe with papillae along the lateral margins in the first parapodium （vs. auricular prechaetal lobe with smooth margins）. The morphological description and illustration of both species are given.展开更多
基金Supported by the Ocean Public Welfare Scientific Research Project,State Oceanic Administration of the People′s Republic of China(No.201505004)Scientific Research Fund of the Second Institute of Oceanography,SOA(No.JG1807)
文摘China Seas are one of the most diverse regions in the Pacific. Though much eff ort has been made to explore its biodiversity, the polychaetes diversity is still poorly known. A large number of species records are based on ecological investigation rather than taxonomical studies. We update the Polychaete species taxonomicaly described from China coastal waters during 2008–2017 and list them as a catalogue. The catalogue contains 47 species of 32 genera and 17 families, the type depository, type locality and geographic distribution. Some taxonomic problems are present in remarks.
基金Supported by the China Postdoctoral Science Foundation (No.2021M691866)the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(Nos.GML2019ZD0404,GML2019ZD0409)+2 种基金the Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(No.SMSEGL20SC02)the MEL Outstanding Postdoctoral Scholarshipthe Undergraduate Innovation and Entrepreneurship Training Programs at Xiamen University(No.2021103 84077)
文摘The genus Rhynchospio has fronto-lateral horns on prostomium,paired branchiae from chaetiger 2 to near the posterior end,capillary notochaetae only,and more than two pairs of pygidial cirri.Rhynchospio species are common in coastal soft bottom communities;nevertheless,many recorded Rhynchospio specimens around the world are currently undescribed.Here we described a Rhynchospio species based on specimens collected from Qingdao,China.Comparison with the reported DNA sequences of four gene markers(16S rRNA,18S rRNA,28S rRNA,and Histone H3)and brief morphological description of specimens collected from Jinhae Bay,South Korea,previously reported as Rhynchospio aff.asiatica,indicated that they are conspecific.Morphologically,specimens of R.aff.asiatica from Qingdao are characterized by having neuropodial hooded hooks from chaetigers 14–17(vs.10–23 in R.asiatica)to near pygidial chaetigers,sperm from chaetiger 11 to 14(vs.from chaetiger 11 to 21–22 in R.asiatica),oocytes from chaetigers 16–17 to 26–39(vs.from 22–24 in R.asiatica),and 4–6(vs.up to 6 in R.asiatica)pygidial cirri.Genetically,Rhynchospio aff.asiatica is most closely related to R.arenincola Hartman,1936 from California,USA with the interspecific distances of 20.02%(16S rRNA),4.50%(18S rRNA),8.44%(28S rRNA),2.74%(Histone H3),and 6.10%(concatenated sequences).Water flow across the dorsum created by ciliary beating of the branchiae and nototrochs,observed on live specimens,may help transport gametes from reproductive segments in anterior and middle parts to the posterior brooding segments.Phylogenetic trees based on concatenated sequences of four gene markers of 54 spioniform species in 25 genera revealed two clades,covering the two subfamilies Spioninae and Nerininae respectively.Two families(i.e.,Poecilochaetidae and Trochochaetidae)in the order Spionida were clustered within Spionidae,supporting a morphology-based proposal that these families bearing a pair of prehensile,grooved palps should be grouped within a more broadly defi ned family Spionidae.Mapping morphological and reproductive characteristics to the phylogenetic trees indicated that the ancestor of spionids might lack branchiae,broadcast spawn thick-envelop oocytes and ect-aquasperm,and produce planktotrophic larvae.
基金Supported by the Ministry of Science and Technology of the People’s Republic of China (MOST) (No. 2006FY110500)the External Cooperation Program from Chinese Academy of Sciences (No. GJHZ200808)
文摘Ataxonomic survey of benthic marine animals from coastal regions of Hainan Island, South China Sea, revealed specimens of a new species of Eunice (Polychaeta: Eunicida: Eunicidae), Eunice uschakovi n. sp., collected from the intertidal zone. The species belongs to the group of Eunice that has yellow tridentate subacicular hooks and branchiae scattered over an extensive region of the body. It resembles E. miurai and E. havaica in having both bidentate and tridentate falcigers, but can be readily distinguished by branchial features. Comparisons between E. uschakovi and the two related species are presented.
基金The National Natural Science Foundation of China under contract No.31601842the Strategic Priority Research Program of the Chinese Academy of Sciences under contract No.XDA11030201the Scientific and Technological Innovation Project financially supported by the Pilot National Laboratory for Marine Science and Technology(Qingdao)under contract No.2016ASKJ14
文摘A taxonomic study of Hyalinoecia species based on the materials deposited in the Marine Biological Museum of the Chinese Academy of Sciences （MBMCAS） yielded two species： Hyalinoecia tubicola （MOiler, 1776） and H. papillata Imajima, 1999. Both species were collected from the sandy bottoms in the northern South China Sea. Hyalinoecia tubicola is widely distributed from the coast of Guangdong Province southwards to the Xisha Islands. Hyalinoecia papillata is reported for the first time in the South China Sea. It differs from H. tubicola in having a prolonged, tongue-like prechaetal lobe with papillae along the lateral margins in the first parapodium （vs. auricular prechaetal lobe with smooth margins）. The morphological description and illustration of both species are given.
