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dc.creatorCadena E.-A. 
dc.creatorVanegas A. 
dc.creatorJaramillo C. 
dc.creatorCottle J.M. 
dc.creatorJohnson T.A. 
dc.date.accessioned2020-05-25T23:56:42Z
dc.date.available2020-05-25T23:56:42Z
dc.date.created2019
dc.identifier.issn2724634
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/22492
dc.description.abstractMesoclemmys is the most diverse extant genus of South American pleurodires or side-necked turtles, with at least 10 species inhabiting fluvial to littoral environments. Despite this high extant diversity and extensive geographic distribution, the evolutionary history and fossil record of this genus are completely unknown. Here, we describe the first fossil record of this genus, which supports a previous molecular-based hypothesis that indicates a minimum split time of 13.5 Ma between this and other genera of South American chelids. Mesoclemmys vanegasorum, sp. nov., is represented by a nearly complete shell (carapace and plastron) and some postcranial bones found in the middle Miocene (13.6 ± 0.2 Ma), La Victoria Formation, Tatacoa Desert, Colombia, increasing the turtle paleodiversity of La Venta Fauna. It differs from all extant species of Mesoclemmys by vertebral scute 1 reaching the sutural boundary between peripherals 1 and 2; shorter cervical and marginal scutes 1 to 3; pleurals 1 very advanced over the peripherals; pygal bone with a posteromedial shallow notch; vertebral 5 covering half of the pygal bone; small extragulars reaching only half of the epiplastra length; and a fine microvermiculation of the shell. Our phylogenetic results show a close relationship between M. vanegasorum, sp. nov., and the extant M. hogei. The overall morphology and size of Mesoclemmys genus have remained relatively constant for at least the last 13.6 million years. However, its geographic distribution has decreased drastically in northwestern South America, being restricted today to the lower region of the Magdalena River Basin. © 2020, © by the Society of Vertebrate Paleontology.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.relation.ispartofJournal of Vertebrate Paleontology, ISSN:2724634, Vol.39, No.5 (2019)
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85083077251&doi=10.1080%2f02724634.2019.1716777&partnerID=40&md5=1507504d4b52afbdae3c1d1dd2baed56
dc.titleA new Miocene turtle from Colombia sheds light on the evolutionary history of the extant genus Mesoclemmys Gray, 1873
dc.typearticle
dc.publisherTaylor and Francis Inc.
dc.subject.keywordEvolution
dc.subject.keywordFossil record
dc.subject.keywordGeographical distribution
dc.subject.keywordMiocene
dc.subject.keywordMorphology
dc.subject.keywordNew species
dc.subject.keywordPhylogeny
dc.subject.keywordTurtle
dc.subject.keywordColombia
dc.subject.keywordColumbia [missouri]
dc.subject.keywordMagdalena basin
dc.subject.keywordMissouri
dc.subject.keywordUnited states
dc.subject.keywordChelidae
dc.subject.keywordPhrynops
dc.subject.keywordPleurodira
dc.subject.keywordTestudines
dc.rights.accesRightsinfo:eu-repo/semantics/openAccess
dc.type.spaArtículo
dc.rights.accesoAbierto (Texto Completo)
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doihttps://doi.org/10.1080/02724634.2019.1716777
dc.relation.citationIssueNo. 5
dc.relation.citationTitleJournal of Vertebrate Paleontology
dc.relation.citationVolumeVol. 39
dc.source.instnameinstname:Universidad del Rosario
dc.source.reponamereponame:Repositorio Institucional EdocUR


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