
Maria Nazareth Ferreira da SilvaInstituto Nacional de Ciência e Tecnologia de Adaptações da Biota Aquática da Amazônia | inpa
Maria Nazareth Ferreira da Silva
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Publications (27)
There is limited knowledge about tick diversity in the Amazon region. Here, we survey small terrestrial mammals for tick infestation at the Rio Pardo settlement, Amazonas State, Brazil. Sampling included rainy and dry seasons and four ecotones (primary forest, forest in regeneration, field crops and households). Each animal was inspected for ticks,...
Despite the current disjoint distribution of Amazonian and Atlantic forests, evidence suggests past historical connections. Here we investigated the historical connections between three didelphid mammal species from Amazonian and Atlantic forests (Caluromys philander, Marmosa demerarae, and M. murina) using comparative phylogeography and paleodistr...
Platyrrhinus guianensis is bat with a distribution restricted to the Guiana Region of South America in Guyana and Suriname. Herein, we report the southernmost record of this species, extending its distribution to Brazil in Brazilian Amazon. Our record indicates that the species have a larger geographical range that previously thought. Platyrrhinus...
The genus Saguinus comprises three principal clades that diverged in the Middle to Late Miocene. Their taxa are ecologically differentiated and allopatrically distributed. These clades were recently recognized as different genera, Saguinus, Tamarinus and Oedipomidas. In Tamarinus, the phylogenetic relationships among species/subspecies are poorly u...
Despite the disjunct distribution of Amazonian and Atlantic forests, evidence suggests historical connections. Here we investigated the historical connections between three didelphid mammal species from Amazonian and Atlantic forests ( Caluromys philander , Marmosa murina and Marmosa demerarae ) to uncover these connections using a comparative phyl...
This study aimed to understand the impact of LINE-1 and SINE-B1 retroelements on the architecture and karyotypic diversification of five rodent species of the genus Proechimys from different regions of the Amazon. Karyotype comparisons were performed using fluorescent interspecific in situ hybridization. The L1 and B1 retroelements showed a non-ran...
Spiny mice of the genus Neacomys Thomas, 1900 are small oryzomyines that occur in forested habitats from Panama to central Bolivia. Previously known by only four species, systematic revisions provided great increase in genus species richness, which currently comprises 20 valid species. Herein we raise this number to 23, describing three new species...
Background:
Trypanosomatids are widespread and cause diseases - such as trypanosomiasis, sleeping sickness, Chagas disease, and cutaneous and visceral leishmaniasis - in animals and humans. These diseases occur in both rural and urban regions due to unplanned growth and deforestation. Thus, wild and synanthropic reservoir hosts living in residenti...
Species of Neacomys are small cricetid rodents that occur in forested habitats of Central and South America, from eastern Panama to central Bolivia and central/western Brazil. In order to assess species diversity of this poorly known genus, we obtained cytochrome b gene sequences from the most comprehensive taxonomic and geographic sampling analyze...
We present new karyotype records for six Proechimys species from the Brazilian Amazon. P. echinothrix from the region of Purus River had 2n = 32 chromosomes and a FN = 58, while P. cuvieri from the region of the Japurá River presented 2n = 28 and FN = 46. All individuals presented hybridization with an 18S rDNA probe in a single chromosome pair, wi...
In recent decades the diploid numbers recorded in the New World marsupials have been widely discussed in the context of the processes of karyotype evolution in these mammals. While Interstitial Telomeric Sequences (ITS) have long been interpreted as remnants of chromosomal fusion, the biological role of these features, together with their intraspec...
The application of environmental DNA (eDNA) metabarcoding as a biomonitoring tool has greatly increased, but studies have focused on temperate aquatic macro‐organisms. We apply eDNA metabarcoding to detecting the mammalian community in two high‐biodiversity regions of Brazil: the Amazon and Atlantic Forests. We identified Critically Endangered and...
The application of environmental DNA (eDNA) metabarcoding as a biomonitoring tool has greatly increased in the last decade. However, most studies have focused on aquatic macro-organisms in temperate areas (e.g., fishes). We apply eDNA metabarcoding to detect the mammalian community in two high-biodiversity regions of Brazil, the Amazon and Atlantic...
Although the Atlantic Forest marmosets (Callithrix spp.) are among the best studied Neotropical primates, the Amazonian marmosets (Callibella humilis, Cebuella spp. and Mico spp.) are much less well-known. Even species diversity and distributions are yet to be properly determined because field data and materials currently available in scientific co...
Several hypotheses have been used to explain diversification in the Neotropics. Integrating evolution with ecology extends the scope of testing the frameworks of these hypotheses. We test diversification hypotheses by integrating phylogeography and ecological niche models (ENMs) using the rodent Hylaeamys megacephalus (Azara’s broad-headed oryzomys...
Two silver arowana, Osteoglossum bicirrhosum, one male (49.5 cm standard length, LS) and one female (52.5 cm LS) that had fed on small‐eared colilargo or small‐eared pygmy rice rat Oligoryzomys microtis, were sampled during the rising water period in the Brazilian Amazon. The identified prey were 6 and 8 cm long and occupied the entire stomachs of...
Two silver arowana, Osteoglossum bicirrhosum, one male (49.5 cm standard length, LS) and one female (52.5 cm LS) that had fed on small‐eared colilargo or small‐eared pygmy rice rat Oligoryzomys microtis, were sampled during the rising water period in the Brazilian Amazon. The identified prey were 6 and 8 cm long and occupied the entire stomachs of...
We investigated the karyotype of 18 didelphid species captured at 13 localities in the Brazilian Amazon, after conventional staining, C-banding, Ag-NOR and fluorescent in situ hybridization (FISH) using the 18S rDNA probe. Variations were found in the X chromosome, heterochromatin distribution and the 18S rDNA sequence. The main variation observed...
Newly collected specimens of the rare semi-aquatic mouse Neusticomys oyapocki (Rodentia: Sigmodontinae:
Ichthyomyini) exhibit individual variation in tooth number. Whereas this Guianan ichthyomyine
had previously been described as having only two molars per jaw quadrant, our study examines 31 specimens,
of which 12 exhibit from one to four addition...
Oecomys Thomas, 1906 is one of the most diverse and widely distributed genera within the tribe Oryzomyini. At least sixteen species in this genus have been described to date, but it is believed this genus contains undescribed species. Morphological, molecular and cytogenetic study has revealed an uncertain taxonomic status for several Oecomys speci...
The marsupials of the family Didelphidae went through profound taxonomic rearrangements in recent decades, mainly related to an increase in the number of specimens deposited in scientific collections and the inclusion of molecular data in systematic analyses, resulting in better resolved phylogenies and taxa delimitation. Analyses of a large series...
The recent capture of a prepubertal male specimen of the rare opossum Glironia venusta provided the description of its genital system and a comparison with other Brazilian didelphids. Glironia is remarkable for the morphology of its short-clefted glans penis in which the urethral grooves terminate near the tips. This taxon shows two pairs of bulbo-...