New occurrences and biological aspects to four species of rodents (Mammalia: Cricetidae) from Brazil

Abstract

The most representative group among mammals are rodents for presenting high ratio to the total of species. However, rodents are considered a "taxonomic chaos" and some species such as Blarinomys breviceps, Bibimys labiosus, Akodon lindberghi and Pseudoryzomys simplex are little known. That can be explained because of low occurrence of small terrestrial mammals in wildlife inventories and/or reduced abundance. The objective is to describe the occurrence of these species and analyze these locations presenting descriptive comments about their biological aspects. Therefore, in addition to specimens collected in the field, some scientific collections were visited and reviews in relevant literature were conducted in order to obtain information about the locations and biological aspects. Akodon lindberghi was found in five sites, Bibimys labiosus was found in 15, Blarinomys breviceps in 39 and Pseudoryzomys simplex in 13. Each species has specific information and they are included in two threatened areas, Atlantic Forest and Cerrado. The occurrences are disconnected and related to taxonomic and methodological problems.Keywords: New records. Rodentia. Sigmodontinae. Occurence area.

Helminth metacommunity structure of wild rodents in a preserved area of the Atlantic Forest, Southeast Brazil

“…In our survey, the other hosts captured, A. ruschii and B. breviceps, which had very low abundance, are considered rare in small mammal inventories when compared to other rodents such as A. montensis (PEREIRA et al, 2008;CERBONCINI et al, 2014;MACHADO et al, 2016). Thus, for these species, there are no records of helminth infection published in the literature.…”

Small mammal diversity in Semi-deciduous Seasonal Forest of the southernmost Brazilian Pampa: the importance of owl pellets for rapid inventories in human-changing ecosystems

“…The uncertain taxonomic status and subtle cranial traits of the three species recognized for this genus preclude reliably assigning these specimens to one particular species (Pardiñas et al, 2015a(Pardiñas et al, , 2017a. Populations recorded in RS are referred to B. labiosus (Winge, 1887) (e.g., Pardiñas et al, 2015a;Machado et al, 2016), which is a plausible hypothesis for the SLS specimens pending a revision of a more extensive set of traits (e.g., molecular data).…”