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Publications (50)
The Brazilian Merganser (Mergus octosetaceus) is one of the rarest birds in South America, and it is a critically endangered Anatidae species with an estimated population of less than 250 adult individuals in the Brazilian Cerrado. A captive population was established a few years ago at Zooparque Itatiba (São Paulo state) where 46 individuals were...
Mensagem Doce 175: 56-67; ISSN 1981-6243; APACAME - Associação Paulista de Apicultores, Criadores de Abelhas Melíficas Europeias.
O Brasil possui uma alta riqueza de abelhas nativas sem ferrão (ANSF), com espécies com distribuição ampla e outras com distribuição mais restrita. Algumas dessas espécies estão listadas como ameaçadas de extinção e as c...
The genus Actenosigynes includes two species, A. fulvoniger (Michener, 1989) and A. mantiqueirensis Silveira, 2009, both oligolectic on flowers of Blumenbachia (Loasaceae) in southern Brazil. We describe a third species, Actenosigynes silveirai Siriani-Oliveira, sp. n., and provide additional evidence to the suspected narrow host-plant specificity...
The Brazilian merganser (Mergus octosetaceus) is one of the most endangered bird species in South America and comprises less than 250 mature individuals in wild environments. This is a species extremely sensitive to environmental disturbances and restricted to a few “pristine” freshwater habitats in Brazil, and it has been classified as Critically...
In the current study, two euglossine species, Exaerete smaragdina and Eulaema nigrita, a cleptoparasite bee and its host, respectively, were used as models to: (i) access the genetic diversity and population structure of both species, sampled along a wide latitudinal range of Atlantic Forest, where the distribution of El. nigrita and Ex. smaragdina...
Most studies evaluating insect communities along climatic gradients in mountain regions have overlooked the relevance of the contrasting effects of xeric and mesic habitats on species distribution and richness. Mesic zones in xeric ecosystems can provide more favorable conditions for the maintenance of some insects, including orchid bees (Apidae, E...
Recent studies have argued that changes in fire regimes in the 21st century are posing a major threat to global biodiversity. In this scenario, incorporating species' physiological, ecological, and evolutionary traits with their local fire exposure might facilitate accurate identification of species most at risk from fire. Here, we developed a fram...
The Brazilian merganser ( Mergus octosetaceus ) is one of the most endangered bird species in South America that comprises less than 250 mature individuals in the wild environments. This is a species extremely sensitive to environmental disturbances and restricted to few “pristine” freshwater habitats in Brazil, and it has been classified as Critic...
The emperor tamarin, Tamarinus imperator, is composed of two subspecies, the nominal type, T. i. imperator, distributed between the Acre and Purus Rivers, whose range is limited between the Brazilian state of Acre and Peru are unbounded, and T. i. subgrisescens, occurring in Peru, Bolivia, and Brazil, in the Brazilian states of Acre and Amazonas. M...
Tropical dry forests are increasingly threatened by human activities. In Northeast Brazil, the Caatinga, an area of tropical dry forests surrounded by wetlands, is considered globally unique among these habitats. In this region, the stingless bee Plebeia flavocincta is found in a variety of environmental, ecological, and demographic conditions. We...
Bees are important insects both environmentally and economically. Despite this, most bee species are poorly characterized regarding their morphology and nesting habits, which are relevant characteristics for planning management and conservation. Plebeia flavocincta is a stingless bee species that occurs in the Northeast region of Brazil and there i...
Molecular evolutionary studies provide fundamental evidence to be applied in biodiversity conservation and management [1,2].[...]
A problem for understanding bumblebee biogeography is that if bumblebees dispersed from Asia through North America to South America, if they are poor at long-distance dispersal with establishment over sea, and if the land bridge between North and South America was not established until c. 3Ma BP, then there is an apparent conflict with the divergen...
A detailed phylogeny of bumblebees is urgently needed to understand speciation and biogeographic diversification in the Neotropical region. We sequenced autosomal and mtDNA loci from nine Brazilian bumblebee species and compiled it with the data already available to obtain highly resolved phylogenetic trees with fossil-calibrated dates. The ancestr...
Didelphis species have been shown to exhibit very conservative karyotypes, which mainly differ in their constitutive heterochromatin, known to be mostly composed by repetitive DNAs. In this study, we used genome skimming data combined with computational pipelines to identify the most abundant repetitive DNA families of Lutreolina crassicaudata and...
Opossums of the genus Didelphis comprise six species representing the largest American marsupials. Although the monophyly of the species of the genus, as well as that of the genus itself, is well supported in most phylogenetic studies, the relationships among those species are not yet understood. In this study, we present the complete mitochondrial...
Global climatic changes can have drastic impacts on plant species, including severe consequences for the agricultural species productivity. Many of these species present important mutualisms with endophytic fungi that positively influence their performance. The present study evaluated whether the increases in CO2 and temperature predicted for the y...
Most studies analyze fragmentation due to habitat loss caused by anthropogenic activities and few of them analyzed fragmentation on naturally fragmented areas. In the Eastern Amazon, it is possible to find areas naturally open and surrounded by pristine forest. Understanding how species respond to isolation in these areas is an important challenge...
Understanding the factors that influence the composition and structure of bee communities in natural habitats is critical for conservation and restoration efforts, mainly in disturbed ecosystems that are widely used for agricultural crop production, such as tropical dry forests (TDF). The aim of this study was to evaluate the effects of tree specie...
The environmental consequences associated with Fundão tailings dam failure in
Mariana, Minas Gerais, Brazil on 05 November 2015 are still being investigated. Bees
are the main pollinators believed to be most affected by the accident because they
occur throughout the area affected by the dam rupture and build their nests in the soil.
In this study,...
Vermilingua is a peculiar group of xenarthran placental mammals with well-established phylogenetic relationships based on morphological and molecular data, but until now, no combined analysis of those data types. Here we perform the first total-evidence phylogenetic analysis of Vermilingua and estimate divergence times for living and fossil anteate...
Scaura Schwarz is a small, widely distributed Neotropical genus of stingless bees whose workers and males have the metabasitarsus as broad as or wider than the metatibia. The genus currently includes four valid species. A species complex composed of three additional species are described here as new (S. amazonica sp. n., S. aspera sp. n. and S. cea...
The bee tribe Eucerini is a large monophyletic taxon occurring in all continents, except Oceania and Antarctica, but far more diverse in the Americas and, especially, in the Neotropics. The phylogenetic relationships within its subtribe Eucerina, which contains the bulk of Eucerini diversity, is poorly understood, this being especially true for the...
In this study, we analysed the processes resulting in the origin of two endemic sister species of bumblebees in the Brazilian Atlantic Forest. We studied the historical distribution pattern of Bombus bahiensis, which is restricted to small fragments in eastern Brazil and the phylogeographic pattern and historical demography of B. brasiliensis, whic...
The Americas were the last inhabitable continents to be occupied by humans, with a growing multidisciplinary consensus for entry 15–25 thousand years ago (kya) from northeast Asia via the former Beringia land bridge [1–4]. Autosomal DNA analyses have dated the separation of Native American ancestors from the Asian gene pool to 23 kya or later [5, 6...
Thygater Holmberg 1884, a Neotropical bee genus included in the tribe Eucerini, is distributed from Argentina to Mexico, was last revised almost 50 years ago, and included 30 species. Significant problems in Thygater taxonomy are like those found in other bee taxa: sexual dimorphism (sometimes accentuated); large intraspecific variation in some tax...
In order to contribute to the understanding of the effect of geological and climatic changes on species diversification in the Neotropics, we employed molecular techniques to study the population dynamics of the glossophagine bat Glossophaga soricina, a widespread species in the Neotropical region. We aimed to assess the dispersal and distribution...
The human Y chromosome contains highly informative markers for making historical inferences about the pre-Columbian peopling of Americas. However, the scarcity of these markers has limited its use in the inference of shared ancestry and past migrations relevant to the origin of the culturally and biologically diverse Native Americans. To identify n...
Many single-nucleotide polymorphisms (SNPs) in the non-recombining region of the human Y chromosome have been described in the last decade. High-coverage sequencing has helped to characterize new SNPs, which has in turn increased the level of detail in paternal phylogenies. However, these paternal lineages still provide insufficient information on...
A espécie Anacardium humile (St. Hilaire) é uma fruteira nativa do Cerrado, utilizada tradicionalmente, tanto no consumo in natura como na forma de sucos, doces e geleias, mas ainda pouco explorada economicamente. Em uma área de cerrado campo sujo, com transição para cerrado campo rupestre, localizada no município de Patrocínio, Minas Gerais, Brasi...
This work tested whether or not populations of Bombus brasiliensis isolated on mountain tops of southeastern Brazil belonged to the same species as populations widespread in lowland areas in the Atlantic coast and westward along the Paraná-river valley. Phylogeographic and population genetic analyses showed that those populations were all conspecif...
The orchid-bee fauna of the region of Porto Velho, in the state of Rondônia, Brazil, close to the southernmost limits of the Amazon Basin, was surveyed for the first time using five different scents as baits to attract orchid-bee males. Five hundred and twenty-one males belonging to five genera and 29 species were collected with bait traps during 2...
The orchid-bee faunas (Hymenoptera: Apidae: Euglossina) of the three largest forest remnants in the "Centro de Endemismo Pernambuco", northeastern Brazil, namely Estação Ecológica de Murici (ESEC Murici), RPPN Frei Caneca, and a forest preserve belonging to Usina Serra Grande, in the states of Alagoas and Pernambuco, were surveyed using seventeen d...
Acknowledgments to read as: The Brazilian government, through the environmental departments IBAMA and ICMBio, provided the collecting permits (#26425-1 and 4310-1). We thank Prof. Dr. Adalberto J. Santos, from the 'Universidade Federal de Minas Gerais', for allowing us to photograph the holotype depicted in Figures 4-6 using the equipment under his...
Eufriesea zhangi Nemésio & Santos Júnior sp. n. is described from the 'Parque Nacional de Ubajara', state of Ceará, northeastern Brazil. This orchid-bee species is superficially similar to the blackish species belonging to the Eufriesea mussitans (Fabricius, 1787) species-group. Molecular and morphological (both external and genital) characters wer...
