Trinomys, one of the most species-rich spiny rat genera in Brazil, is widely distributed in Caatinga, Cerrado and Atlantic Forest biomes, and currently includes ten recognized species, three of which are polytypic. Although some studies... more
Trinomys, one of the most species-rich spiny rat genera in Brazil, is widely distributed in Caatinga, Cerrado and Atlantic Forest biomes, and currently includes ten recognized species, three of which are polytypic. Although some studies employing molecular data have been conducted to better characterize phylogenetic relationships among species, 19 nominal taxa have been suggested, implying considerable incongruence regarding species boundaries. We addressed this incongruence by intensively sampling all species across the geographic distribution of the genus. In addition to publicly available data, we generated 182 mt-Cytb gene sequences, and employed phylogenetic and computational species delimitation methods to obtain a clearer picture of the genus diversity. Moreover, we evaluated populational diversity within each accepted species, considering their geographical distribution and a timescale for the evolution of the genus. Beyond confirming the general patterns described for the e...
Research Interests: Evolutionary Biology, Zoology, Biology, Genus, Phylogenetic Tree, and 3 moreSubspecies, Biome, and Taxon
<p>Species tree generated using Dataset 3. For more information please see Nascimento et al. Journal of Biogeography (Accepted for publication).</p
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<p>BEAST input file for Bayesian phylogenetic analysis for capuchin monkey species that simultaneously estimates the gene tree, the species tree and phylogeographic reconstructions. For more information regarding the different... more
<p>BEAST input file for Bayesian phylogenetic analysis for capuchin monkey species that simultaneously estimates the gene tree, the species tree and phylogeographic reconstructions. For more information regarding the different Datasets see Nascimento et al. Journal of Biogeography (under review).</p
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<p>BEAST input file for Bayesian phylogenetic analysis for capuchin monkey species that simultaneously estimates the gene tree, the species tree and phylogeographic reconstructions. For more information regarding the different... more
<p>BEAST input file for Bayesian phylogenetic analysis for capuchin monkey species that simultaneously estimates the gene tree, the species tree and phylogeographic reconstructions. For more information regarding the different Datasets see Nascimento et al. Journal of Biogeography (under review).</p
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<p>BEAST input file for Bayesian phylogenetic analysis for capuchin monkey species that simultaneously estimates the gene tree, the species tree and phylogeographic reconstructions. For more information regarding the different... more
<p>BEAST input file for Bayesian phylogenetic analysis for capuchin monkey species that simultaneously estimates the gene tree, the species tree and phylogeographic reconstructions. For more information regarding the different Datasets see Nascimento et al. Journal of Biogeography (under review).</p
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<p>Gene tree using the cytochrome b for capuchin monkey species using Dataset 3. For more information see Nascimento et al. Journal of Biogeography (under review).</p
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<p>Gene tree using the cytochrome b for capuchin monkey species using Dataset 2. For more information see Nascimento et al. Journal of Biogeography (under review).</p
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<p>Gene tree using the cytochrome b for capuchin monkey species using Dataset 1. For more information see Nascimento et al. Journal of Biogeography (under review).</p
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All files used in paper Nascimento et al. 2015 (42:1349–1357) Reanalysis of the biogeographical hypothesis of range expansion between robust and gracile capuchin monkeys. Journal of Biogeography (DOI: 10.1111/jbi.12448).
<p>DNA sequence alignment in nexus format for the cytochrome b using Dataset 3. For more information see Nascimento et al. Journal of Biogeography (under review).</p
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A review of small non-volant mammal species of the APA Gama e Cabeça de Veado was carried out, including new surveys in the ââ?¬Å?Estação Ecológica do Jardim Botânicoââ?¬Â (EEJBB) and ââ?¬Å?Reserva Ecológica do Instituto Brasileiro de... more
A review of small non-volant mammal species of the APA Gama e Cabeça de Veado was carried out, including new surveys in the ââ?¬Å?Estação Ecológica do Jardim Botânicoââ?¬Â (EEJBB) and ââ?¬Å?Reserva Ecológica do Instituto Brasileiro de Geografia e Estatísticaââ?¬Â (REIBGE). Thirty-one small mammalââ?¬â?¢s species are registered for the APA Gama and Cabeça de Veado, including one exotic species. Didelphis albiventris, Hylaeamys megacephalus, and Oxymycterus delator were collected for the first time in EEJBB. The APA Gama-Cabeça de Veado has a central position in the Cerrado domain sharing six species with the Amazon domain, five with Atlantic Forest, and 13 with Caatinga. The APA Gama-Cabeça de Veado encompasses the home range of at least six non-volant small mammal species endemic of Cerrado domain, and it has an important role in the protection of these endemic species and species that occurs in those four South America morphoclimatic domains.
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ABSTRACT On November 8th, 2012, the Brazilian Ministry of Environment (MMA), through The Chico Mendes Insti- tute of Biodiversity Conservation (ICMBio/MMA), issued the Circular Letter no. 01/2012/COINF/CGPEQ /DIBIO, regarding toe clipping... more
ABSTRACT On November 8th, 2012, the Brazilian Ministry of Environment (MMA), through The Chico Mendes Insti- tute of Biodiversity Conservation (ICMBio/MMA), issued the Circular Letter no. 01/2012/COINF/CGPEQ /DIBIO, regarding toe clipping as a method of individual iden- tification for studying small mammals, and requested expert opinion on the subject. We provide below the response we submitted to the Ministry, which is the official position of the Brazilian Society of Mammalogists (SBMz) on the subject.
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The spiny rat
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We report two new localities for the rodent species Wiedomys cerradensis Gonçalves, Almeida and Bonvicino, 2005, previously known only from its type locality, in southwestern Bahia state, and one neighbor locality. Three new specimens... more
We report two new localities for the rodent species Wiedomys cerradensis Gonçalves, Almeida and Bonvicino, 2005, previously known only from its type locality, in southwestern Bahia state, and one neighbor locality. Three new specimens were collected along the Paranã River Valley, in the Goiás and Tocantins states, central Brazil. These records extend the range of this species to the northwest, approximately 190 km. We provide external and cranial measurements of these specimens and comment on their morphology.
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Zoonoses são doenças que são transmitidas de animais vertebrados para o homem e também do homem para os animais, principalmente quando seu ciclo ecológico é alterado, seja por intervenção natural ou pela intervenção humana. Incluem... more
Zoonoses são doenças que são transmitidas de animais vertebrados para o homem e também do homem para os animais, principalmente quando seu ciclo ecológico é alterado, seja por intervenção natural ou pela intervenção humana. Incluem doenças emergentes e reemergentes distribuídas mundialmente e de preocupação para a saúde pública, pois causam vários prejuízos e mortes na população humana. Estudos revelam que as zoonoses estão ligadas a várias espécies de mamíferos, incluindo os marsupiais, que atuam como hospedeiros de algumas destas doenças zoonóticas. Apesar da maioria dos estudos se concentrarem em marsupiais didelfídeos de porte maior, identificamos várias espécies de pequenos marsupiais dos gêneros Monodelphis, Marmosa (Marmosa), Marmosa (Micoureus), Gracilinanus e Thylamys como hospedeiras de agentes zoonóticos causadores de doenças, como toxoplasmose, leishmaniose, tripanossomíase, verminoses, coccidiose, arboviroses, microsporidiose, peste negra e fasciolíase, na América do Su...
ABSTRACT The data used by Lynch Alfaro et al. (2012a, Journal of Biogeography, 39, 272–288) and the biogeographical hypothesis postulated by these authors to explain the current distribution of capuchin monkeys were reanalysed including... more
ABSTRACT The data used by Lynch Alfaro et al. (2012a, Journal of Biogeography, 39, 272–288) and the biogeographical hypothesis postulated by these authors to explain the current distribution of capuchin monkeys were reanalysed including additional cytochrome b data from Sapajus xanthosternos and Sapajus flavius. Our reconstructed phylogeny placed S. xanthosternos in a monophyletic clade representing the most basal lineage of this genus. All analyses indicated polyphyletic arrangements for several capuchin species, suggesting that incomplete lineage sorting has occurred during their evolution. These results also suggest that available molecular data lack adequate variation for accurately resolving species relationships. These results suggest that the divergence of capuchin monkey genera may have occurred in the Atlantic Forest. However, a more conclusive scenario and better resolution of the species tree requires correct identification of species, data from several unlinked nuclear loci from a higher number of individuals per species, and careful analysis of ancient DNA data from museum specimens.
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A new karyotype of Wiedomys pyrrhorhinus (Wied, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapéu, situated in the northern region of the Chapada Diamantina,... more
A new karyotype of Wiedomys pyrrhorhinus (Wied, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapéu, situated in the northern region of the Chapada Diamantina, state of Bahia. Karyological studies of W. pyrrhorhinus have shown a constant diploid number (2n) of 62 with two different numbers of autosomal arms (FNa): 86 and 90, respectively. The new karyotype revealed 2n = 62 and FNa = 104, being the higher autosomal number found so far for this genus. The X chromosome is a large acrocentric and the Y chromosome is a small acrocentric. The analysis of the karyotype morphology suggests that this new karyotype is more closely related to the previous karyotype with 2n = 62 and FNa = 90, described from Caetité, Bahia State. Further studies, comparing different populations of W. pyrrhorhinus, including molecular approaches, may help to better understand the geographical limits of each population and their phylogenetic relationships in the Caatinga biome.