{"refrec":{"BRefID":325098,"RR":"<b>Jang, S.-J.; Ho, P.-T.; Jun, S.-Y.; Kim, D.; Won, Y.-J.</b> (2020). A newly discovered <i>Gigantidas</i> bivalve mussel from the Onnuri Vent Field in the northern Central Indian Ridge. <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 161</i>: 103299. <a href=\"https://dx.doi.org/10.1016/j.dsr.2020.103299\" target=\"_blank\">https://dx.doi.org/10.1016/j.dsr.2020.103299</a>","BEntID":318575,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 161</i>: 103299. <a href=\"https://dx.doi.org/10.1016/j.dsr.2020.103299\" target=\"_blank\">https://dx.doi.org/10.1016/j.dsr.2020.103299</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Jang, S.-J.; Ho, P.-T.; Jun, S.-Y.; Kim, D.; Won, Y.-J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Jang, S.-J. <i>et al.</i>","Englishabstract":"We describe a new vent mussel species, <em>Gigantidas vrijenhoeki</em> n. sp., from material collected at a depth of 2022&nbsp;m in the newly discovered Onnuri Vent Field (OVF) during the 2018 expedition to the Central Indian Ridge. This large modioliform mussel thrives around diffusive vents in aggregation with another dominant hydrothermal vent mussel, <em>Bathymodiolus marisindicus</em>. <em>G. vrijenhoeki</em> n. sp. was distinguished from its neighboring <em>B. marisindicus</em> by its distinct shell profile, which consists of an elongated shell with a short and low anterior region, high expanded posterior region, and deep ventral concavity. Visually, the new mussel species resembles <em>G</em>. <em>securiformis</em>; however, it is clearly distinguished by several shell and anatomical features. Genetically, the new species is closely related to two undescribed <em>Gigantidas</em> species found in the cold seeps of the western Pacific. Phylogenetic analysis of <em>G. vrijenhoeki</em> n. sp. supports the connectivity of vent fauna between the Indian Ocean and the western Pacific in the past. To the best of our knowledge, this is the first record of a <em>Gigantidas</em> species in the Indian Ocean. In addition, we found gill-associated sulfur-oxidizing and methane-oxidizing bacteria, <em>Gammaproteobacteria</em> and <em>Epsilonproteobacteria,</em> symbionts present on this new species. Their composition was clearly different from symbionts found on the co-occurring <em>B. marisindicus</em> at the OVF. Notably, the <em>sulfurovum</em>-related <em>Epsilonproteobacteria</em> on the <em>G. vrijenhoeki</em> n. sp. were phylogenetically distinct from the family of Bathymodiolinae-related <em>Epsilonproteobacteria</em>. Taken together, the co-occurrence of two mussel species at the new vent field and their distinct gill symbiotic communities provides a useful setting in which to study the genetic connectivity of vent mussels along the Central Indian Ridge and the evolutionary dynamics between host mussels and symbionts.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"A newly discovered <i>Gigantidas</i> bivalve mussel from the Onnuri Vent Field in the northern Central Indian Ridge","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-12 01:31:58.014912","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Deep-sea bivalvia; Gigantidas; Bathymodiolinae; mussel gill-related symbionts; Onnuri vent field; Central Indian Ridge","OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2020-06-12","DateCreate":"2020-06-12","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000540839500010","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.dsr.2020.103299"},"refs":null,"anarec":{"AnaID":325098,"PubliDate":2020,"Pagination":"103299","XtraPublOfAnaID":null,"ISBN":null,"Volume":"161","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45506,"SerRR":"Deep-Sea Research, Part I. 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