{"refrec":{"BRefID":355097,"RR":"<b>Sun, S.; Xiao, N.; Sha, Z.</b> (2022). Complete mitochondrial genomes of four deep-sea echinoids: conserved mitogenome organization and new insights into the phylogeny and evolution of Echinoidea. <i>PeerJ 10</i>: e13730. <a href=\"https://dx.doi.org/10.7717/peerj.13730\" target=\"_blank\">https://dx.doi.org/10.7717/peerj.13730</a>","BEntID":352810,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>PeerJ 10</i>: e13730. <a href=\"https://dx.doi.org/10.7717/peerj.13730\" target=\"_blank\">https://dx.doi.org/10.7717/peerj.13730</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Sun, S.; Xiao, N.; Sha, Z.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Sun, S.; Xiao, N.; Sha, Z.","Englishabstract":"Echinoids are an important component in benthic marine environments, which occur at all depths from the shallow-water hard substrates to abyssal depths. To date, the phylogeny of the sea urchins and the macro-evolutionary processes of deep-sea and shallow water groups have not yet been fully resolved. In the present study, we sequenced the complete mitochondrial genomes (mitogenomes) of four deep-sea sea urchins (Echinoidea), which were the first representatives of the orders Aspidodiadematoida, Pedinoida and Echinothurioida, respectively. The gene content and arrangement were highly conserved in echinoid mitogenomes. The <i>tRNA-Ser</i><sup>AGY</sup> with DHU arm was detected in the newly sequenced echinoid mitogenomes, representing an ancestral structure of <i>tRNA-Ser</i><sup>AGY</sup>. No difference was found between deep-sea and shallow water groups in terms of base composition and codon usage. The phylogenetic analysis showed that all the orders except Spatangoida were monophyletic. The basal position of Cidaroida was supported. The closest relationship of Scutelloida and Echinolampadoida was confirmed. Our phylogenetic analysis shed new light on the position of Arbacioida, which supported that Arbacioida was most related with the irregular sea urchins instead of Stomopneustoida. The position Aspidodiadematoida (((Aspidodiadematoida + Pedinoida) + Echinothurioida) + Diadematoida) revealed by mitogenomic data discredited the hypothesis based on morphological evidences. The macro-evolutionary pattern revealed no simple onshore-offshore or an opposite hypothesis. But the basal position of the deep-sea lineages indicated the important role of deep sea in generating the current diversity of the class Echinoidea.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Complete mitochondrial genomes of four deep-sea echinoids: conserved mitogenome organization and new insights into the phylogeny and evolution of Echinoidea","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":"Deep-sea, Mitochondrial genome, Phylogenetic relationship, Evolution","OtherDescriptors":null,"Notes":null,"AnaPub":2022,"MonPub":null,"DateUpdate":"2022-08-23","DateCreate":"2022-08-23","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000835171100001","VABBcode":null,"OpenAcc":1,"DOI":"10.7717/peerj.13730"},"refs":null,"anarec":{"AnaID":355097,"PubliDate":2022,"Pagination":"e13730","XtraPublOfAnaID":null,"ISBN":null,"Volume":"10","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":242055,"SerRR":"PeerJ. 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