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      Lagartijas de la provincia de Santa Cruz, Argentina: distribución geográfica, diversidad genética y estado de conservación

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          Abstract

          Este trabajo resume las características geográficas, genéticas y de conservación de los saurios de la provincia de Santa Cruz; se presentan también comentarios acerca del estado del arte de la investigación en la provincia y las perspectivas futuras de los mismos. Utilizando ~ 1500 registros de presencia, se realiza un inventario biológico actualizado y se incluyen mapas de distribución, fotografías de las especies, comentarios genéticos y estatus de conservación para las lagartijas de Santa Cruz. El número de especies de lagartijas distribuidas en esta provincia es de 29 (27 especies y dos subespecies), sin embargo tres de éstas no presentan registros actuales. En base a los patrones genéticos se identifican al menos diez especies candidatas, linajes no descriptos que poseen suficiente diferenciación genética como para representar especies nuevas, cuyo estatus específico tiene que ser evaluado en futuras investigaciones. Este trabajo combina la información tradicionalmente presentada en inventarios biológicos con información genética, de distribución y estatus de conservación. Más allá de la novedosa integración realizada, este trabajo tiene la potencialidad de guiar el desarrollo de estudios detallados, en los que se puedan identificar (entre otras) zonas tanto para conservación como para explotación sustentable, así como también puede acelerar la descripción de nuevos taxa llenando los vacíos en el conocimiento de la taxonomía alfa.

          Translated abstract

          In this paper we present a revision of the geographic distribution, genetic characteristics and conservation status of lizards from the Santa Cruz province. We summarize the state-of-the-art in herpetological research, as well as future directions for research in this province. We present an updated checklist using ~1500 records of lizards, and include distributional maps, species photographs, comments on genetic variability and the conservation status of all recognized taxa. Twenty-nine species of lizards (27 species and two subspecies) are cited for this territory, although three of them lack of recent references, and from the genetic patterns we identify at least ten candidate species. These are defined as non-described lineages characterized by sufficient genetic differentiation to likely represent new species, but intensive taxonomic work is needed in order to confirm their specific status. In combining traditional information presented in checklists with genetic data, distributional patterns, and conservation status, we hope that this novel data integration approach will lead other investigators to develop similar studies. These types of studies represent the first step towards identification of priority conservation areas, as well as identification of those that are more appropriate for intense anthropogenic use; moreover this study will accelerate the description of new taxa, thereby filling gaps in alpha taxonomic knowledge.

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          Most cited references93

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          Gene Trees in Species Trees

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            Phylogeography: the history and formation of species

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              High-resolution species trees without concatenation.

              The vast majority of phylogenetic models focus on resolution of gene trees, despite the fact that phylogenies of species in which gene trees are embedded are of primary interest. We analyze a Bayesian model for estimating species trees that accounts for the stochastic variation expected for gene trees from multiple unlinked loci sampled from a single species history after a coalescent process. Application of the model to a 106-gene data set from yeast shows that the set of gene trees recovered by statistically acknowledging the shared but unknown species tree from which gene trees are sampled is much reduced compared with treating the history of each locus independently of an overarching species tree. The analysis also yields a concentrated posterior distribution of the yeast species tree whose mode is congruent with the concatenated gene tree but can do so with less than half the loci required by the concatenation method. Using simulations, we show that, with large numbers of loci, highly resolved species trees can be estimated under conditions in which concatenation of sequence data will positively mislead phylogeny, and when the proportion of gene trees matching the species tree is <10%. However, when gene tree/species tree congruence is high, species trees can be resolved with just two or three loci. These results make accessible an alternative paradigm for combining data in phylogenomics that focuses attention on the singularity of species histories and away from the idiosyncrasies and multiplicities of individual gene histories.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                cherp
                Cuadernos de herpetología
                Cuad. herpetol.
                Facultad de Ciencias Agrarias Universidad Nacional de Jujuy (San Salvador de Jujuy, Jujuy, Argentina )
                1852-5768
                September 2014
                : 28
                : 2
                : 83-110
                Affiliations
                [01] Puerto Madryn Chubut orgnameCENPAT-CONICET orgdiv1Grupo de Herpetología Patagónica Argentina
                [02] Provo Utah orgnameUniversidad Brigham Young orgdiv1Departamento de Biología y Museo de Ciencias Naturales Estados Unidos de América
                Article
                S1852-57682014000200002
                bfa38f77-6b79-4436-a075-58fb42782ebb

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : August 1308
                : July 1307
                : May 1311
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 100, Pages: 28
                Product

                SciELO Argentina


                Inventario,Liolaemini,Patagonia,Patrones génicos,Taxonomía alfa,Check list,Genetic patterns,Alfa taxonomy

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