Brazilian Journal of Mammalogy

Question marks no more: The White Saddle-back Tamarin Leontocebus melanoleucus (Miranda Ribeiro 1912) occurs east of the Tarauacá river, Acre, Brazil

2025-08-19T12:31:52-03:00

The known range of the White Saddle-back Tamarin (Leontocebus melanoleucus) is restricted to the region between the Juruá and Tarauacá rivers in the southwestern Amazon. Documented records east of the Tarauacá along both banks of the Muru river in central Acre expand its distribution eastwards by over 60 km and suggest the Envira river marks the actual limit of its range, increasing its probable range by 39.5%.

New records of bush dog in fragmented landscapes of southwestern Goiás, central Brazil

2025-05-08T21:18:19-03:00

The bush dog (Speothos venaticus) is a rare canid found in Central and South America. In this study, we report three new records of bush dog from southwestern Goiás, central Brazil. We record two roadkill incidents (2019 and 2024) and a direct observation in 2024, where two individuals were seen heading towards a forest fragment. The records occurred in fragmented landscapes, primarily consisting of forests and savannas, highlighting the species' habitat preference. However, habitat fragmentation and isolation in the region increase vulnerability during dispersal, leading to higher risks of roadkill incidents.

Characterization of mammal fauna in a canga vegetation area in the Serra do Gandarela National Park, Minas Gerais

2025-01-07T09:29:05-03:00

We conducted, for the first time, a survey of the terrestrial fauna of small, medium, and large mammals in two ironstone outcrops (canga) areas at the Serra do Gandarela National Park, Minas Gerais, Brazil: a degraded canga (DC) due to mining activities prior to the creation of the park and a preserved canga (PC). We recorded 13 species (DC = 10, PC = 10), distributed across eight families and seven orders (Akodon cf. montensis, Calomys tener, Cerdocyon thous, Cerradomys subflavus, Dasypus novemcinctus, Didelphis albiventris, Leopardus guttulus, Monodelphis domestica, Necromys lasiurus, Oligoryzomys rupestris, Subulo gouazoubira, Sylvilagus minensis, and Tapirus terrestris).

Biological invasion of the exotic Oryctolagus cuniculus Linnaeus, 1758 (Lagomorpha, Leporidae) in Brazilian Atlantic Forest?

2025-03-28T10:44:51-03:00

Lagomorpha is an order of friendly mammals with two families, Leporidae and Ochotonidae. Within Leporidae, Oryctolagus (European rabbit) presents an almost worldwide distribution, with introduction in several countries. Few is known about the Oryctolagus cuniculus in Brazil, probably due to its similarity to Sylvilagus species that are natural from Americas. The presence of the specimen herein reported in Brazilian Atlantic Forest can be consequence of an expansion of Chilean and Argentinian populations towards Brazilian Atlantic Forest, or a new release. This finding highlights the concern to monitor this exotic species with potential to become an invasive, as reported in Chile.

First report of complete albinism in Ozotoceros bezoarticus (Linneaus, 1758) from Pantanal, Brazil

2024-05-08T08:22:04-03:00

Albinism is caused by a genetic mutation that results in the absence of melanin production and therefore all pigmentation in the hair, skin or deeper tissues of the body is absent. The specimen of pampas deer was found at Caiman Pantanal. Some factors can increase the chances for albinism, such as inbreeding among isolated populations or between closely related individuals. Since animal color is also likely to be influenced by other factors, further studies are needed to understand if the occurrence of albino pampas deer in this wetland reflects the overall low genetic diversity of this population.

Um Karyological data of Pseudoryzomys simplex (Rodentia - Sigmodontinae) from Atlantic Forest biome of Northeastern Brazilian

2025-02-05T12:51:04-03:00

Pseudoryzomys simplex is small to medium-sized rodent, with terrestrial and semi-aquatic habits, generally associated with open areas of plains with heavy seasonal rainfall along the Chaco, Cerrado and Caatinga. Despite its extensive distribution, the species is considered rare and difficult to capture. In the present study, we provide the first cytogenetic characterization of G and C bands of P. simplex collected in plantations and pasture environments in the Atlantic Forest. Our goal is to report new cytogenetics data on the species as a basis for future taxonomic revision as well as a better understanding of the geographic variation ofthis species.

What can camera traps tell us about reproduction and survival of a neotropical marsupial?

2024-08-22T15:21:57-03:00

In this paper, we present the first record of a female Metachirus myosuros carrying two young on her back, along with data on the species' reproduction, obtained during two wildlife monitoring studies in the state of Rio de Janeiro, Brazil. The low number of young (n = 2) carried by the female compared to the average litter size (n = 8.33) suggests a high mortality rate for the species in the first months of life. This record adds to other studies indicating that early survival is a critical phase in the life cycle of marsupials.

New Record of Collared Peccary, Dicotyles tajacu (Linnaeus, 1758) (Artiodactyla, Tayassuidae), in Furnas do Bom Jesus State Park, State of São Paulo, Brazil.

2024-06-04T17:22:15-03:00

Report of a record of the collared peccary in Furnas do Bom Jesus State Park, in Pedregulho. The area has been monitored for 11 years, and in 2022 we obtained the first documented record of the species in the region. This record emphasizes the importance of protected areas for biodiversity conservation, highlighting how the park serves as a refuge against anthropogenic pressures. Continuous monitoring promotes understanding of the distribution and ecology of the collared peccary, as well as the entire community present there, reinforcing the need for ongoing conservation efforts and long-term monitoring.

Adeus ao mestre Juhani Ojasti - um prócer do manejo da fauna silvestre na América Latina

2025-06-02T16:08:08-03:00

This text presents the obituary of Juhani Ojasti, a distinguished mammalogist and a leading figure in wildlife management in Latin America. It includes biographical information about his scientific career, with particular emphasis on his work in Venezuela and his contributions to mammalogy. The text also offers a brief personal account on the experience of having known him, both in academic settings and informal interactions, highlighting his impact as both a scientist and a human being.

Importance of the Zoological Collection of the Regional University of Blumenau for the knowledge of the bat fauna (Mammalia: Chiroptera) of the Chapecó river basin, western region of Santa Catarina

2024-11-30T12:21:11-03:00

Chiroptera is one of the most diverse groups of mammals in the world, however, several areas remain poorly sampled. This is evidenced in the western region of the state of Santa Catarina, in southern Brazil, where the Chapecó river basin is located. In the present study, 265 specimens deposited in the Scientific Collection of the Regional University of Blumenau were analyzed and collected during environmental studies in three hydroelectric plants in this basin, which covers the ecotone between the Seasonal Forest and Mixed Ombrophilous Forest (Araucaria Moist Forest), in the lower parts, and the Mixed Ombrophilous properly, in the highest parts. 21 species, 13 genera, and three families were recorded. Some specimens of the genus Myotis could not be identified as the species, reflecting the complex taxonomy of the group. Insectivorous bats presented the greatest richness (15 species). This predominance was also observed in other studies in the western region of Santa Catarina, in areas of Seasonal Forest and Mixed Ombrophilous Forest, as opposed to areas of Dense Ombrophilous Forest in the eastern region, where the predominance of bats from the Phyllostomidae family has been recorded. This work demonstrates the importance of Scientific Collections, as identifications could not be confirmed solely through indirect data from reports delivered to environmental agencies.