Bats have been increasingly studied in the last 15 years in Mato Grosso do Sul, and several records were not yet considered in reviews of South American bat distributions. Here, we present the bat species and their distributions in Mato Grosso do Sul based mainly on data compilation from literature, but also on complementary information from zoological collections, and our and colleagues' unpublished records. We found 74 species of bats within 42 genera and seven families already reported in Mato Grosso do Sul. Bat species in this state represent 44% of the Brazilian's bat species (E 169) and 7% of the world's bat richness (E 1120). Phyllostomidae (42) and Molossidae (17) were the richest families. Four species formerly cited for Mato Grosso do Sul are not supported by our compilation, and other 15 species recorded in the vicinity are listed as potential occurrences in this state. We additionally found controversial traits for specimens of Platyrrhinus helleri, and report Eumops dabbenei for the first time in Brazil. Most species were recorded in the regions of Cerrado (60) or Pantanal (57) in Mato Grosso do Sul, but only 16 in the Atlantic Forest. Records of Phyllostomidae species were mostly found in Cerrado and those of Molossidae, in Pantanal. Records in Mato Grosso do Sul determine edges of distribution for at least 22 species of South American bats. The overall known chiropteran fauna of Mato Grosso do Sul is highly diverse and new findings are expected through additional surveys. Keywords: Cerrado, Chiroptera, geographic distribution, Eumops dabbenei, Pantanal, Platyrrhinus helleri.
ABSTRACT. We updated the checklist of mammals from Mato Grosso do Sul, Brazil based on primary records only. One hundred and sixty-six mammal species were listed as occurring in the state, 47 of them being medium to large, 47 small mammal and 73 bat species. The listed species are distributed in 31 families: Didelphidae (17 spp.), Dasypodidae (7 spp.), Myrmecophagidae (2 spp.), Cebidae (1 sp.), Callithrichidae (2 spp.), Aotidae (1 sp.), Pitheciidae (1 sp.), Atelidae (1 sp.), Leporidae (1 sp.), Felidae (7 spp.), Canidae (4 spp.), Mustelidae (5 spp.), Mephitidae (2 spp.), Procyonidae (2 spp.), Tapiridae (1 sp.), Tayassuidae (2 spp.), Cervidae (4 spp.), Sciuridae (1 sp.), Cricetidae (22 spp.), Erethizontidae (1 sp.), Caviidae (3 spp.), Dasyproctidae (1 sp.), Cuniculidae (1 sp.), Echimyidae (4 spp.), Phyllostomidae (41 spp.), Emballonuridae (2 spp.), Molossidae (16 spp.), Vespertilionidae (9 spp.), Mormoopidae (1 sp.), Noctilionidae (2 spp.), and Natalidade (1 sp.). These numbers represent an increase of fourteen species with primary records for the state in comparison with the previously published checklist. However, it is evident the scarcity of information at several regions of the state, and the need of implementation of regional zoological collections. The state of Mato Grosso do Sul represent only 4.19% of the Brazilian territory, but the number of mammal species reach 24.13% of the known species occurring in the country.
Different works have registered the number of mammal species within the natural habitats of the Pantanal based on currently known records, with species richness ranging from 89 to 152 of annotated occurrences. Our present list sums 174 species. However, at least three factors have to be emphasised to deal with recorded numbers: 1) to establish the ecotone limit between the floodplain (which is the Pantanal) and its neighbouring domain like the Cerrado, besides the existence of maps recently produced; 2) the lack of intensive surveys, especially on small mammals, rodents and marsupials; and 3) the constant taxonomic revision on bats, rodents and marsupials. Some species are very abundant -for example the capybara Hydrochoerus hydrochaeris and the crab-eating fox Cerdocyon thous, and some are rare, and others are still intrinsically rare -for example, the bush dog Speothos venaticus. Abundance of species is assumed to reflect ecological resources of the habitat. Local diversity and number of individuals of wild rodents and marsupials also rely on the offering of ecological resources and behavioural specialisation to microhabitat components. A large number of species interact with the type of the vegetation of the habitat, by means of habitat selection through active patterns of ecological behaviour, resulting on dependency on arboreal and forested habitats of the Pantanal. In addition, mammals respond to seasonal shrinking-and-expansion of habitats due to flooding regime of the Pantanal. The highest number of species is observed during the dry season, when there is a considerable expansion of terrestrial habitats, mainly seasonally flooded grassland. Major threats to mammal species are the loss and alteration of habitats due to human intervention, mainly deforestation, unsustainable agricultural and cattle-ranching practices, which convert the natural vegetation into pastures. The Pantanal still harbours about a dozen of species officially listened as in danger.Keywords: biodiversity, conservation, Pantanal habitats, mammal species, environmental threat. Mamíferos terrestres e aquáticos do Pantanal ResumoDiversos trabalhos têm registrado o número de espécies de mamíferos nos diferentes hábitats naturais do Pantanal, com base nos registros do conhecimento corrente, com a riqueza de espécies variando de 89 a 152 ocorrências anotadas. Nossa lista atual soma 174 espécies. Contudo pelo menos três fatores devem ser enfatizados quando se lida com os números encontrados: 1) o limite exato do ecótono entre a bacia de inundação (que é o Pantanal) e os domínios vizinhos, como o Cerrado, apesar da existência de mapas recentes; 2) a falta de levantamentos intensivos, particularmente sobre pequenos mamíferos, roedores e marsupiais; e 3) a revisão taxonômica constante de morcegos, roedores e marsupiais. Algumas espécies são abundantes, como a capivara Hydrochoerus hydrochaeris, e o lobinho Cerdocyon thous, outras são raras e outras ainda são intrinsecamente raras, como o cachorro-vinagre Speothos venaticus. Assume-se que...
Species of Mimon Gray, 1847, are known to occur from Mexico to central Bolivia and southeastern Brazil, ranging from 22 o N to 25 o S of latitude. In latitudes between 14 and 25 o S, approximately, the known occurrence of Mimon is restricted to east Brazil, in the Atlantic rainforest. Only in latitudes lower than 14 o S the species of Mimon additionally occurs in central and western South America, in the Amazon, Cerrado and Caatinga. Mimon crenulatum (E. Geoffroy, 1810) is locally uncommon but widespread over the range of the genus distribution. We report here the occurrence of M. crenulatum at ca. 20 o S of latitude in the Pantanal wetlands, western Brazil. It is probably the first record of the genus Mimon in this ecosystem, and it increases the geographic range of M. crenulatum distribution to western Brazil in latitudes greater than 14 o S.
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