Ana Lazar

Museu Nacional /UFRJ

The spiny rat Trinomys, with ten endemic species in eastern Brazil, has a complex taxonomy. We carried out a revision of the karyotypes of Trinomys, described for the first time the karyotype of Trinomys paratus and performed the first phylogenetic analysis including all Trinomys species based on the mitochondrial cytochrome b gene. The T. paratus...

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. xanthos...

A large geographic differentiation has been reported in Sylvilagus brasiliensis based on external characters of a small number of specimens. A new karyotype with 2n = 40 and FNa = 74 from Rio de Janeiro is herein reported. Phylogenetic analyses based on cytochrome b DNA of eight samples from the states of Paraíba, Tocantins, Goiás, Minas Gerais and...

The Neotropics harbors a high diversity of species and several hypotheses have been proposed to account for this pattern. However, while species of forested domains are frequently studied, less is known of species from open vegetation formations occupying, altogether, a larger area than the Amazon Forest. Here we evaluate the role of historical bar...

Abstract: Natural infection by zoonotic agents in armadillos (Cingulata). The study of epidemiological profile of zoonoses is important for a better understanding of the transmission of their ethiologics agents and for identification of potential areas of emergency epicenters zoonotic outbreaks, acting as an essential factor in predicting new epide...

Red-nosed mice (genus Wiedomys) are restricted to the Brazilian Cerrado and Caatinga biomes, distributed along the São Francisco River (SFR). Until recently, Wiedomys was considered monotypic, but 2 species with poorly defined geographic and morphological limits have been recognized: W. cerradensis and W. pyrrhorhinos. Our study used morphological,...

New World porcupines are rodents belonging to the Erethizontidae family which is divided into two subfamilies: Chaetomyinae, represented by the genus Chaetomys, and Erethizontinae, which includes the genera Erethizon and Coendou. Within this family, the taxonomy of Coendou has proven to be particularly complex and challenging. It remains one of the...

We designed a set of amplification primers to target the mitochondrial cytochrome b gene of the rodent genus Oligoryzomys. Combinations of two sets of primers successfully amplified complete mitochondrial and partial cytochrome b (MT-CYB), from not only Oligoryzomys, but also other mammalian species from the orders Rodentia, Didelphimorphia, Primat...

The South American marsupials (Didelphimorphia) have a complex history. Previous studies have tended to focus on the role played by geomorphological arches and shields. In the present chapter, the species diversities of didelphimorphians from the Central Brazil, Atlantic, and Guiana shields and eastern and western Amazonian lowlands are compared, b...

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...

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...

Within the Amazon basin, the lowlands of the western Amazon stand out due to their complex geomorphological history, with their crystalline arches and several rivers, which are currently actual or potential barriers to terrestrial vertebrates' dispersion. The western Amazonas basin can be highlighted as being the world's richest biological hotspot....

Livro infantil sobre amor pela literatura e a importância de conhecer e divulgar informações sobre animais ameaçados de extinção e os biomas onde habitam no Brasil. Projeto literário produzido de forma independente, através de um projeto de financiamento coletivo, para divulgação científica com ênfase na biodiversidade e conservação ambiental. Com...

Despite the relatively short history of the Brazilian Society of Mammalogy (SBMz) with its 31 years, some remarkable women made significant contributions, not only to the SBMz, but also to the Brazilian mammalogy in general. Even before the consolidation of the SBMz, several women, regardless of their position in the society and academy, developed...

We investigated the proportion of female speakers in four different categories of presentation at the Brazilian Congress of Mammalogy (CBMz), and the associated representativeness by Brazilian regions. We found a significant disparity in the proportion of female speakers across presentation categories and geographic regions throughout the nine CBMz...

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...

Cormura brevirostris is a rare and poorly known species of emballonurid bat that occurs in Central America and South America across the Amazonian region. Previous work showed that karyotypes of C. brevirostris from Colombia, Suriname, and the Brazilian Amazon presented 2n = 22 and FN = 40, although small differences in chromosome composition have b...

Resumo: É comum encontrarmos séries inteiras de espécimes de pequenos mamíferos preservados em meio líquido, mesmo não sendo o procedimento mais indicado. A técnica aqui proposta trata da preparação de exemplares fixados por um longo período de tempo em meio líquido e sobre particularidades no processo de taxidermia. O protocolo foi aplicado com su...

The unexpected low genetic diversity in Alouatta from Atlantic Forest together with the few patches of Atlantic Forest capable of supporting this large sized species, pointed to the fragility of this species.

Background: The mammalian fauna of the eastern Caatinga, a Brazilian semiarid biome, was surveyed in the dry and wet seasons aiming to contribute to the knowledge of this poorly known region. Complementary live-trap survey methods were employed for sampling small non-volant mammals and transects along roads for medium and large mammals. Results: Se...

A review of small non-volant mammal species of the APA Gama e Cabeça de Veado was carried out, including new surveys in the “Estação Ecológica do Jardim Botânico” (EEJBB) and “Reserva Ecológica do Instituto Brasileiro de Geografia e Estatística” (REIBGE). Thirty-one small mammal’s species are registered for the APA Gama and Cabeça de Veado, includi...

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 p...

Resumo: Os quirópteros apresentam características que contribuem para um eficiente papel nas diversas zoonoses. Neste trabalho é mostrado o envolvimento dos morcegos no ciclo de algumas das mais importantes zoonoses do Brasil e sua atuação como hospedeiro e/ou vetor destas doenças. Este trabalho se baseou em pesquisa via internet de bases de dados,...

Abstract: The order Chiroptera presents characteristics that contribute to an efficient role in a diversity of zoonoses. In this work it is shown the involvement of bats in the cycle of some of the most important zoonoses in Brazil and their acting as a host and/or vector of these diseases. This work was based on internet research databases, nation...

Wiedomys Hershkovitz, 1959 is a rodent genus endemic of Brazilian semiarid with two recognized species: W. pyrrhorhinus (Wied-Neuwied, 1821) and W. cerradensis Gonçalves, Almeida and Bonvicino, 2005. Wiedomys pyrrhorhinus occurs in the Caatinga biome of the states of Alagoas, Bahia, Ceará, Minas Gerais, Piauí, Paraíba, and Pernambuco, with its type...

Maximum likelihood phylogeny for cytb of Thrichomys. Similar topology was observed for Bayesian analysis. Numbers close to branches are SH-aLRT followed by posterior probability (pp) values. When identical values are observed, only one value is shown. (PDF)

Summary of Bayes-DIVA analysis of Thrichomys. The tree is a MCC phylogeny generated with Beast for cytb. Circles at nodes show probabilities of ancestral ranges. Only the higher probabilities are shown. When two biogeographic regions are underlined in a node, it represents that ancestral range was at both regions. Biogeographic regions: A: southern...

List of Thrichomys specimens included in this study, their haplotype number (H), GenBank accession number, field or museum identification number (ID), localities, karyotypes and Biogeographic regions (Bio Regions). (PDF)

Maximum likelihood phylogeny for FGB of Thrichomys. Similar topology was observed for Bayesian analysis. Numbers close to branches are SH-aLRT followed by pp values. When identical values are observed, only one value is shown. (PDF)

A new karyotype of Wiedomys pyrrhorhinus (Wed, 1821) is described, including G- and C-banding and Ag-NOR sites from specimens collected in the municipality of Morro do Chapeu, 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 di...

The karyotype of Dasyprocta azarae has not been described previously. In this article we describe the karyotype of D. azarae from Northern Pantanal, Mato Grosso, Central Brazil. D. azarae has a diploid number 2n=64 and a number of autosomal arms NA=122. The 2n and NA are the same as those reported for other Brazilian species of Dasyprocta, but diff...

ABSTRACT: A morphometric discrimination analysis was performed for Trinomys minor (Reis & Pessôa, 1995) and Trinomys albispinus (Is. Geoffroy, 1838). The samples used in this study are from localities in the Chapada Diamantina, a vast plateau in central Bahia State, Brazil. A specimen recently obtained near the type-locality of Trinomys minor was a...