{"refrec":{"BRefID":339670,"RR":"<b>Kayama Watanabe, H.; Senokuchi, R.; Nomaki, H.; Kitahashi, T.; Uyeno, D.; Shimanaga, M.</b> (2021). Distribution and genetic divergence of deep-sea hydrothermal vent copepods (Dirivultidae: Siphonostomatoida: Copepoda) in the Northwestern Pacific. <i>Zool. Sci. 38(3)</i>: 223-230. <a href=\"https://dx.doi.org/10.2108/zs200153\" target=\"_blank\">https://dx.doi.org/10.2108/zs200153</a>","BEntID":336305,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Zool. Sci. 38(3)</i>: 223-230. <a href=\"https://dx.doi.org/10.2108/zs200153\" target=\"_blank\">https://dx.doi.org/10.2108/zs200153</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kayama Watanabe, H.; Senokuchi, R.; Nomaki, H.; Kitahashi, T.; Uyeno, D.; Shimanaga, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kayama Watanabe, H. <i>et al.</i>","Englishabstract":"Copepods in the family Dirivultidae are one of the most successful meiofauna in deep-sea hydrothermal vent fields and are abundant near venting fluid. Although vents are spatially limited ocean habitats, they are distributed widely in the Atlantic, Pacific, and Indian Oceans. However, knowledge of dirivultid biogeography and phylogeography remains limited, especially in the northwestern Pacific. Here, we obtained partial mitochondrial COI gene sequences of three dirivultids from the northwestern Pacific—<i>Stygiopontius senokuchiae</i> and an unidentified <i>Chasmatopontius</i> species from vent fields in the Izu–Bonin Arc and <i>Stygiopontius senckenbergi</i> associated with the squat lobster <i>Shinkaia crosnieri</i> in the Okinawa Trough—and analyzed them in comparison with existing data. The among-species sequence diversity exceeded 80 out of 560 bp (14% or 0.166 in Kimura 2-parameter distance), whereas the within-species diversity was less than 10 bp (2% or 0.018 in Kimura 2-parameter distance), with no genetic saturation. Each species formed a monophyletic clade and the genetic region targeted is deemed reliable for identifying species and populations for these copepods. Among the three genera targeted, only <i>Chasmatopontius</i> formed a monophyletic cluster, while <i>Aphotopontius</i> and <i>Stygiopontius</i> did not. Species delimitation analyses suggested the existence of cryptic species in <i>Chasmatopontius</i>. Subdivision among local populations was observed in <i>Aphotopontius</i>, but not in <i>Stygiopontius</i> in the same distribution, implying potential differences in dispersal ability among different genera of dirivultids. Further sampling is required, to fill the spatial gaps to elucidate the biogeography and evolution of dirivultids in the global deep ocean.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Distribution and genetic divergence of deep-sea hydrothermal vent copepods (Dirivultidae: Siphonostomatoida: Copepoda) in the Northwestern Pacific","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-13 01:31:50.246766","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Chemosynthesis-based community, DNA barcoding, Izu-Bonin-Mariana Arc, mitochondrial COI, Okinawa trough ","OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-07-07","DateCreate":"2021-07-06","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000656114300003","VABBcode":null,"OpenAcc":1,"DOI":"10.2108/zs200153"},"refs":null,"anarec":{"AnaID":339670,"PubliDate":2021,"Pagination":"223-230","XtraPublOfAnaID":null,"ISBN":null,"Volume":"38","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44094,"SerRR":"Zoological Science. 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