Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/15897
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dc.contributor.authorWerneck, F. P.-
dc.contributor.authorLeite, Rafael N.-
dc.contributor.authorGeurgas, Silvia Rodrigues-
dc.contributor.authorRodrigues, Miguel Trefaut-
dc.date.accessioned2020-05-19T21:03:18Z-
dc.date.available2020-05-19T21:03:18Z-
dc.date.issued2015-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/15897-
dc.description.abstractBackground: Phylogeographic research has advanced in South America, with increasing efforts on taxa from the dry diagonal biomes. However, the diversification of endemic fauna from the semiarid Caatinga biome in northeastern Brazil is still poorly known. Here we targeted saxicolous lizards of the Tropidurus semitaeniatus species group to better understand the evolutionary history of these endemic taxa and the Caatinga. We estimated a time-calibrated phylogeny for the species group based on two mitochondrial and two nuclear genes and jointly estimated the species limits and species tree within the group. We also devoted a denser phylogeographic sampling of the T. semitaeniatus complex to explore migration patterns, and the spatiotemporal diffusion history to verify a possible role of the São Francisco River as a promoter of differentiation in this saxicolous group of lizards. Results: Phylogenetic analysis detected high cryptic genetic diversity, occurrence of unique microendemic lineages associated with older highlands, and a speciation history that took place during the Pliocene-Pleistocene transition. Species delimitation detected five evolutionary entities within the T. semitaeniatus species group, albeit with low support. Thus, additional data are needed for a more accurate definition of species limits and interspecific relationships within this group. Spatiotemporal analyses reconstructed the geographic origin of the T. semitaeniatus species complex to be located north of the present-day course of the São Francisco River, followed by dispersal that expanded its distribution towards the northwest and south. Gene flow estimates showed higher migration rates into the lineages located north of the São Francisco River. Conclusions: The phylogenetic and population structures are intrinsically associated with stable rock surfaces and landscape rearrangements, such as the establishment of drainage basins located to the northern and southern distribution ranges. The T. semitaeniatus complex preserved high genetic diversity during range expansion, possibly as a result of frequent long-distance dispersal events. Our results indicate that both the current course of the São Francisco River and its paleo-courses had an important role in promoting diversification of the Caatinga endemic T. semitaeniatus species group. © 2015 Werneck et al.; licensee BioMed Central.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 15, Número 1pt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectBiomeen
dc.subjectCaatingaen
dc.subjectDivergenceen
dc.subjectDrainage Basinen
dc.subjectEndemic Speciesen
dc.subjectEvolutionary Theoryen
dc.subjectGene Flowen
dc.subjectLizarden
dc.subjectPhylogeneticsen
dc.subjectPhylogeographyen
dc.subjectPliocene-pleistocene Boundaryen
dc.subjectRange Expansionen
dc.subjectSemiarid Regionen
dc.subjectSpatio-temporal Analysisen
dc.subjectSao Francisco Riveren
dc.subjectSquamataen
dc.subjectTropidurinaeen
dc.subjectTropidurus Semitaeniatusen
dc.subjectAnimalsen
dc.subjectClassificationen
dc.subjectEvolutionen
dc.subjectGenetic Variabilityen
dc.subjectGeneticsen
dc.subjectLizarden
dc.subjectPhylogenyen
dc.subjectPhylogeographyen
dc.subjectPopulation Migrationen
dc.subjectSouth Americaen
dc.subjectAnimals Migrationen
dc.subjectAnimalen
dc.subjectBiological Evolutionen
dc.subjectGenetic Variationen
dc.subjectLizardsen
dc.subjectPhylogenyen
dc.subjectPhylogeographyen
dc.subjectSouth Americaen
dc.titleBiogeographic history and cryptic diversity of saxicolous Tropiduridae lizards endemic to the semiarid Caatingaen
dc.typeArtigopt_BR
dc.identifier.doi10.1186/s12862-015-0368-3-
dc.publisher.journalBMC Evolutionary Biologypt_BR
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