Samuel Campos Gomides

• PhD.
• Professor at Federal University of Western Pará

Global Roadkill Data: a dataset on terrestrial vertebrate mortality caused by collision with vehicles (Supplementary information)

Roadkill is widely recognized as one of the primary negative effects of roads on many wildlife species and also has socioeconomic impacts when they result in accidents. A comprehensive dataset of roadkill locations is essential to evaluate the factors contributing to roadkill risk and to enhance our comprehension of its impact on wildlife populatio...

Background Accidents caused by snakes constitute a serious public health problem in Latin America and worldwide. The situation in the Brazilian Amazon region is neglected, resulting in the highest incidence of cases per capita in the country. Furthermore, the distance from urban areas makes it difficult for the population to access timely and effec...

Vertebrates' roadkill impacts many species in natural areas. However, data on this topic in the Amazon domain are still scarce, especially within protected areas. In this study, we analysed data from 2years of monitoring amphibians, reptiles, mammals and birds' roadkill on five types of terrestrial transport infrastructure in a protected area in th...

Hidden colors are a widespread phenomenon in the animal kingdom, particularly in an-urans. In some cases, hidden colors are suddenly exposed during defensive displays to startle predators, others seemingly remain hidden-particularly from researchers. Amazonian species of Neotropical harlequin toads (genus Atelopus) show striking and consistent vent...

ARTICLE Ongoing harlequin toad declines suggest the amphibian extinction crisis is still an emergency Biodiversity loss is extreme in amphibians. Despite ongoing conservation action, it is difficult to determine where we stand in overcoming their extinction crisis. Among the most threatened amphibians are the 131 Neotropical harlequin toads. Many o...

Aposematic coloration plays an important role for species, as it serves as a clear signal of danger to visually-oriented predators regarding the potential toxicity of individuals displaying this condition. However, considerable gaps remain on this subject, and, primarily, empirical data are lacking to support robust discussions on the topic. The ha...

Climate change poses a threat to biodiversity, particularly to species inhabiting elevated areas. To analyze the impact of climate change on lizards in tropical mountainous areas, we developed models of environmental suitability for two species and projected the outcomes for the present year and for 2070. The results showed a decline in areas of en...

Anthropogenic biodiversity loss is extreme in amphibians. Despite ongoing conservation action, it is difficult to determine where we stand in overcoming their extinction crisis 1,2. Extinction risk is not equally distributed across amphibians 3-5. Among the most threatened amphibians are the 131 Neotropical harlequin toads (Atelopus), many of which...

The Brazilian Cerrado is considered a biodiversity hotspot highly threatened by human activities. Recently, many studies have demonstrated how underestimated is Cerrado’s biodiversity considering squamate species, and the identification of divergent and cryptic lineages is essential for the formulation of effective conservation strategies. The tran...

The reintroduction of a species that is extinct in the wild demands caution because reintroduction locations may be associated with threats, such as hunting, poor‐quality habitat, and climate change. This is the case for Cyanopsitta spixii (Spix's Macaw), which has been extinct in the wild since 2000. The few living individuals were created in capt...

Article impact statement Threats due to climate change may affect the suitabil-ity of areas for reintroduced species. Abstract The reintroduction of a species that is extinct in the wild demands caution because reintro-duction locations may be associated with threats, such as hunting, poor-quality habitat, and climate change. This is the case for C...

While much attention has been paid to vector-borne filariasis, diseases that threaten millions of people in tropical and subtropical countries, the literature on host–parasite associations and transmission strategies of filarial nematodes in wildlife is scarce. Here, we report the co-occurrence of chigger mites ( Eutrombicula alfreddugesi ) and onc...

The Amazon forest is vulnerable to climate change and anthropic actions, such as fire and deforestation, which together represent a troubling scenario. Many traditional populations that inhabit the region depend on nontimber forest resources for food or economic sustenance. We demonstrated that climate change predicted for 2050 may affect the geogr...

Rhachisaurus brachylepis is a poorly known lizard species that was described from Serra do Cipó in the southern portion of the Serra do Espinhaço (Espinhaço Mountain Range), Minas Gerais, Brazil. Almost 50 years after its original description, the species remains known from only a few specimens and brief comments in the literature. Here, we present...

We describe a new species of Amphisbaena from the Caatinga of northeastern Brazil. The new taxon is identified mainly by having 216–239 body annuli, 13–17 caudal annuli without autotomic site, 4–8 (usually six) precloacal pores without a median hiatus, 18–24 dorsal and 18–24 ventral segments at a midbody annulus, 4 supralabials, 3 infralabials, and...

During faunal rescue activities for the construction of a wind farm in the Northeast Region of Brazil, a single specimen of the gymnophthalmid lizard Anotosaura vanzolinia was captured, which represents the first record of the species for the state of Piauí. We used this record, along with records found in the literature, to model the potential dis...

Animals partition environmental resources along three basic dimensions: temporal, spatial, and trophic. Therefore, species differ in their amount of time and/or period of activity, the places in which they explore preferential microhabitats, and the type of prey they eat. These differences in resource use commonly separate niches, reduce competiti...

We describe a new species of Amphisbaena from the Caatinga in the northern region of Bahia, northeastern Brazil. The new taxon is identified mainly by having two precloacal pores, 158–165 body annuli, 12–14 caudal annuli with autotomy on the third and fourth annuli, 14–16 dorsal and 15–16 ventral segments on a midbody annulus, four supralabials, th...

In the present note we extend the geographic distribution of the lizard Psilophthalmus paeminosus by presenting its first record for the state of Minas Gerais, south-eastern Brazil.

Genetic diversity and structure of two species of Enyalius (Squamata: Leiosauridae) from neotropical biodiversity hotspots. Enyalius, a lizard genus endemic to South America, is mostly distributed in the remains of the Atlantic Forest and in the Cerrado. The genus has been the topic of a few studies but none has quantified the genetic diversity and...

A type of locomotor behavior observed in animals with rigid bodies, that can be found in many animals with exoskeletons, shells, or other forms of body armor, to change direction, is the turning behavior. Aquatic floated-turning behavior among rigid bodies animals have been studied in whirligig beetles, boxfish, and more recently in freshwater turt...

Hydromedusa maximiliani is endemic to mountainous regions, with distribution in the Atlantic Forest region along mountain ranges in Southeastern and part of northeastern Brazil. This work aimed at studying the feeding habits of a H. maximiliani population from Minas Gerais state, Southeastern Brazil. Specimens were captured, marked, measured and su...

This work evaluates the diet and the reproductive cycle of Tropidurus torquatus in relation to seasonality in a rock outcrop formations in a remaining area of Atlantic Rainforest. The data indicate that the lizards feed mainly on arthropods and plant material. The female reproductive activity varies between seasons, while males contain spermatozoid...

The aim of the present study was to investigate the relationship between nematode infection and the ontogeny and diet of the lizard Tropidurus torquatus from a rocky outcrop in the state of Minas Gerais, south-eastern Brazil. Eighty-nine of 110 lizards examined (81.9%) harboured nematodes. Two nematode species were identified, namely, Physaloptera...

Biota Neotropica is an electronic, peer-reviewed journal edited by the Program BIOTA/FAPESP: The Virtual Institute of Biodiversity. This journal's aim is to disseminate the results of original research work, associated or not to the program, concerned with characterization, conservation and sustainable use of biodiversity within the Neotropical reg...

This study aimed to evaluate the effect of the number of animals per cage behaviour of anxiety in mice exposed to elevated plus-maze. Thirty Swiss mice were divided into 2 groups: group 1 (G1) and group 2 (G2) with 10 and 20 animals respectively in each cage. Upon reaching 90 days of age, each animal was submitted to the elevated plus-maze, only on...

Data on reptile fauna in the state of Minas Gerais are punctual and show the need of information about this group, mainly in transition regions between the Atlantic Forest and the Cerrado. The study area is located in Ritápolis municipality (21° 01' 37.07" S and 44° 19' 11.84" W), micro-region Campo das Vertentes, State of Minas Gerais, Southeaster...

Testudines, Squamata, Ritápolis, Cerrado, Mata Atlântica

Although Tropidurus is a widely distributed lizard genus in South America and the Galapagos Islands, studies on space use and spatial distribution are scarce. We studied the home range structure of the saxicolous lizard Tropidurus torquatus based on the inland population of a rock outcrop in Minas Gerais State, southeastern Brazil. Lizards were ind...

Trichodactylus fluviatilis (Latreille, 1828) (Decapoda, Trichodactylidae) é uma espécie de caranguejo que habita rios e riachos montanhosos em altitudes até aproximadamente 500 m. Sua distribuição ocorre na América do Sul, desde as bacias costeiras da faixa leste do Brasil até a bacia do alto Paraná e na Argentina. O objetivo do presente trabalho f...

We studied the body temperature of the Saxicolous Lizard (Tropidurus torquatus) in a rocky outcrop of Minas Gerais State, Brazil. The influence of seasonality and the importance of microbabitat temperatures (substrate and air) for T. torquatus body temperature regulation were investigated. The mean body temperature of active T. torquatus was 31.2 ±...