{"refrec":{"BRefID":289260,"RR":"<b>Scarpa, F.; Cossu, P.; Sanna, D.; Lai, T.; Norenburg, J.L.; Curini-Galletti, M.; Casu, M.</b> (2015). An 18S and 28S-based clock calibration for marine Proseriata (Platyhelminthes). <i>J. Exp. Mar. Biol. Ecol. 463</i>: 22-31. <a href=\"https://dx.doi.org/10.1016/j.jembe.2014.10.020\" target=\"_blank\">https://dx.doi.org/10.1016/j.jembe.2014.10.020</a>","BEntID":281297,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Exp. Mar. Biol. Ecol. 463</i>: 22-31. <a href=\"https://dx.doi.org/10.1016/j.jembe.2014.10.020\" target=\"_blank\">https://dx.doi.org/10.1016/j.jembe.2014.10.020</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Scarpa, F.; Cossu, P.; Sanna, D.; Lai, T.; Norenburg, J.L.; Curini-Galletti, M.; Casu, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Scarpa, F. <i>et al.</i>","Englishabstract":"Geminate species are a powerful tool for calibrating the molecular clock in marine organisms, and their adoption is mandatory for soft-bodied taxa, which lack fossil records. The first attempt to calibrate the molecular clock in taxa belonging to meiofaunal microturbellaria (Platyhelminthes: Proseriata) based on geminate species is presented here. We used two species pairs from both sides of the Isthmus of Panama: <i>Minona gemella</i> (Caribbean) and <i>Minona</i> cf <i>gemella</i> (Pacific); <i>Parotoplana</i> sp. nov. 1 (Caribbean) and <i>Parotoplana</i> sp. nov. 2 (Pacific). The mutation rates per million years were estimated for both geminate species pairs on two ribosomal regions, the complete nuclear small subunit rDNA (18S) gene and the partial nuclear large subunit rDNA (28S) gene fragment (spanning variable domains D1–D6). Similar values of mutation rates per million years were found in both species pairs, ranging 0.12–0.16% for 18S and 0.49–0.52% for 28S. The values obtained were used as calibration points at minimum age, in order to estimate the divergence times within the phylogenetic tree of the whole dataset, and tested on three cases of trans-American (not-geminate) species from Pacific Panama and S-E Brazil, belonging to the genera <i>Kata</i>, <i>Archimonocelis</i> and <i>Duplominona</i>. They consistently showed higher divergence times (ranging 9.4–17.9 Myr) than geminate, trans-isthmian pairs. These results suggest potential usefulness of our molecular clock calibration, for future research on phylogeography and evolution of Proseriata.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"An 18S and 28S-based clock calibration for marine Proseriata (Platyhelminthes)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-18 01:32:00.457235","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Meiofauna; Isthmus of Panama; Mutation rates; Relaxed molecular clock;Divergence time; Calibration point","OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2017-09-20","DateCreate":"2017-09-18","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000348628400004","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.jembe.2014.10.020"},"refs":null,"anarec":{"AnaID":289260,"PubliDate":2015,"Pagination":"22-31","XtraPublOfAnaID":null,"ISBN":null,"Volume":"463","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43229,"SerRR":"Journal of Experimental Marine Biology and Ecology. 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