{"refrec":{"BRefID":301755,"RR":"<b>Chae, J.; Seo, Y.; Yu, W.B.; Yoon, W.D.; Lee, H.E.; Chang, S.-J.; Ki, J.-S.</b> (2018). Comprehensive analysis of the jellyfish <i>Chrysaora pacifica</i> (Goette, 1886) (Semaeostomeae: Pelagiidae) with description of the complete rDNA sequence. <i>Zool. Stud. 57</i>: 51 [1-27]","BEntID":293996,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Zool. Stud. 57</i>: 51 [1-27]","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Chae, J.; Seo, Y.; Yu, W.B.; Yoon, W.D.; Lee, H.E.; Chang, S.-J.; Ki, J.-S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Chae, J. <i>et al.</i>","Englishabstract":"The Scyphomedusae genus <i>Chrysaora</i> consists of highly diversified jellyfishes. Although morphological systematics of the genus have been documented over the past century, characterization of molecular taxonomy has been attempted only recently. In the present study, we sequenced an 8,167 bp region, encompassing a single ribosomal DNA (rDNA) repeat unit, from <i>Chrysaora pacifica</i>, and used it for phylogenetic analyses. The tandemly repeated rDNA units turned out to consist of both coding and noncoding regions, whose arrangement was found to be the same as that of a typical eukaryote. None of the 5S rRNA sequences were found among the repeat units. Comparative analyses of jellyfish rDNA sequences showed that the 28S locus is highly informative and divergent compared to the 18S locus. Phylogenetic analyses of the 18S and 28S loci revealed that the Semaeostomeae order of jellyfish is separated into taxonomic groups by families and genera, with a few exceptions. The family Pelagiidae was in a clade separate from other groups, thus forming a monophyletic lineage. All <i>Chrysaora</i> included here formed a strongly supported clade within the family Pelagiidae, and Pelagiidae manifested a sister relationship with Cyanea. Nonetheless, <i>Chrysaora</i> was found to be paraphyletic in both 18S and 28S phylogenies. Chrysaora pacifica was clearly distinct from close relatives <i>C. melanaster</i> and <i>C. quinquecirrha</i>. These results provide a special reference for the DNA taxonomy of Pelagiidae jellyfishes in terms of nuclear cistron rDNA sequences and improve our understanding of the molecular phylogenetic relationships among Semaeostomeae jellyfishes.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Comprehensive analysis of the jellyfish <i>Chrysaora pacifica</i> (Goette, 1886) (Semaeostomeae: Pelagiidae) with description of the complete rDNA sequence","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Jellyfish; Ribosomal DNA; Transcription repeat unit","OtherDescriptors":null,"Notes":null,"AnaPub":2018,"MonPub":null,"DateUpdate":"2018-10-02","DateCreate":"2018-10-02","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000449520600001","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":301755,"PubliDate":2018,"Pagination":"51 [1-27]","XtraPublOfAnaID":null,"ISBN":null,"Volume":"57","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44095,"SerRR":"Zoological studies. 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