Two new deep-water species of Ampharetidae (Annelida: Polychaeta) from the eastern Australian continental margin

IF 0.7 4区生物学 Q4 ZOOLOGY

Records of the Australian Museum Pub Date : 2020-08-12 DOI:10.3853/j.2201-4349.72.2020.1763

L. Gunton, E. Kupriyanova, T. Alvestad

{"title":"Two new deep-water species of Ampharetidae (Annelida: Polychaeta) from the eastern Australian continental margin","authors":"L. Gunton, E. Kupriyanova, T. Alvestad","doi":"10.3853/j.2201-4349.72.2020.1763","DOIUrl":null,"url":null,"abstract":"Two new species, Melinnopsis gardelli sp. nov. and Melinnopsis chadwicki sp. nov. (Annelida, Ampharetidae, Melinninae), are described from deep waters off the east coast of Australia. One hundred and 11 specimens were collected during RV Investigator voyage IN2017_V03 in May–June 2017 using a beam trawl at lower bathyal depths (1000–2500 m). This is the first record of Melinnopsis from the eastern Australian coast. The two new species are morphologically similar, but differ by methyl blue staining pattern, shape of thoracic uncini and pigmented glandular bands above the nuchal slits. Melinnopsis gardelli sp. nov. has a conspicuous stained band on the dorsum ending between chaetigers 9 and 10, uncini with three teeth above the rostral tooth and lacks glandular bands, while M. chadwicki sp. nov. has a faint stained band on the dorsum ending at chaetiger 5, uncini with two teeth above the rostral tooth and possesses glandular bands. They also show differences in bathymetric distribution as M. gardelli sp. nov. was collected around 2500 m and M. chadwicki sp. nov. around 1000 m depth. Phylogenetic relationships among the new species and other members of the family Ampharetidae were assessed using the nuclear 18S and the mitochondrial 16S and cytochrome oxidase subunit I (COI) gene fragments. The results revealed that M. gardelli sp. nov. and M. chadwicki sp. nov. form a monophyletic clade and are genetically distinct from each other and all other analysed species. This is the first time molecular data have been used to describe a species in the genus Melinnopsis.","PeriodicalId":54505,"journal":{"name":"Records of the Australian Museum","volume":"72 1","pages":"101-121"},"PeriodicalIF":0.7000,"publicationDate":"2020-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Records of the Australian Museum","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.3853/j.2201-4349.72.2020.1763","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ZOOLOGY","Score":null,"Total":0}

引用次数: 3

Abstract

Two new species, Melinnopsis gardelli sp. nov. and Melinnopsis chadwicki sp. nov. (Annelida, Ampharetidae, Melinninae), are described from deep waters off the east coast of Australia. One hundred and 11 specimens were collected during RV Investigator voyage IN2017_V03 in May–June 2017 using a beam trawl at lower bathyal depths (1000–2500 m). This is the first record of Melinnopsis from the eastern Australian coast. The two new species are morphologically similar, but differ by methyl blue staining pattern, shape of thoracic uncini and pigmented glandular bands above the nuchal slits. Melinnopsis gardelli sp. nov. has a conspicuous stained band on the dorsum ending between chaetigers 9 and 10, uncini with three teeth above the rostral tooth and lacks glandular bands, while M. chadwicki sp. nov. has a faint stained band on the dorsum ending at chaetiger 5, uncini with two teeth above the rostral tooth and possesses glandular bands. They also show differences in bathymetric distribution as M. gardelli sp. nov. was collected around 2500 m and M. chadwicki sp. nov. around 1000 m depth. Phylogenetic relationships among the new species and other members of the family Ampharetidae were assessed using the nuclear 18S and the mitochondrial 16S and cytochrome oxidase subunit I (COI) gene fragments. The results revealed that M. gardelli sp. nov. and M. chadwicki sp. nov. form a monophyletic clade and are genetically distinct from each other and all other analysed species. This is the first time molecular data have been used to describe a species in the genus Melinnopsis.

查看原文本刊更多论文

澳大利亚东部大陆边缘Ampharetidae的两个深水新物种（环节动物纲：Polychaeta）

在澳大利亚东海岸附近的深水中描述了两个新物种，Melinopsis gardelli sp.nov.和Melinopsis-chadwiki sp.nov..（环节动物纲，Ampharetidae，Melininae）。2017年5月至6月，RV Investigator在IN2017_V03航行期间，使用较低水深（1000–2500米）的波束拖网，采集了111个样本。这是澳大利亚东部海岸首次记录到Melinopsis。这两个新物种在形态上相似，但在甲基蓝染色模式、胸钩形状和珠心狭缝上方的色素腺带方面有所不同。Melinopsis gardelli sp.nov.在毛9和10之间的背上有一条明显的染色带，uncini在喙齿上方有三颗牙齿，没有腺带，而M.chadwicki sp.nov在毛5处的背上也有一条微弱的染色带。uncini在吻齿上方有两颗牙齿，具有腺带。它们还显示出水深分布的差异，因为M.gardelli sp.nov.在2500米左右采集，M.chadwicki sp.nov在1000米左右采集。利用核18S、线粒体16S和细胞色素氧化酶亚基I（COI）基因片段评估了新物种和Ampharetidae科其他成员之间的系统发育关系。结果表明，M.gardelli sp.nov.和M.chadwicki sp.nov形成一个单系分支，在遗传上彼此不同，与所有其他分析物种不同。这是首次使用分子数据来描述梅兰属的一个物种。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Records of the Australian Museum 生物-动物学

CiteScore

0.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Records of the Australian Museum, volume 62 was published in 2010, volume 63 in 2011. Monographic works of particular significance are published irregularly as Records of the Australian Museum, Supplements (ISSN 0812-7387).