-The feeding ecology of the maned wolf (Chrysocyon brachyurus) was studied from 1998 to 2002 in the Ecological Station of Itirapina, São Paulo State, southeastern Brazil, including estimates of prey number and biomass consumption. A total of 325 faecal samples was collected in the area. The species is omnivorous, with a broad diet including 68 species or morphospecies of fruits and animals. Armadillos (Dasypodidae), wolf's fruit (Solanum lycocarpum) and small mammals (mostly Clyomys bishopi) were the bulk of the diet, comprising 72.8 % of the total estimated biomass consumed (185,323.4 g). In terms of frequency of occurrence, on the other hand, only small mammals and other miscellaneous fruits yielded 43.4 % of the total occurrences (N = 1,054). Animal prey ranging from 0.01 and 0.1 Kg were the most captured category, resulting in 44.2 % of 507 captured animals. The maned wolf seems to be seasonally opportunistic, at least for fruits and insects, as indicated by the variation of the consumption of these items along the year. The higher consumption of fruits and animals characteristic of savannah can be an important factor to consider in future management plans for the species.Key words: Chrysocyon brachyurus, maned wolf, savannah, grassland, feeding ecology, diet, Brazil.Resumo -A dieta do lobo-guará (Chrysocyon brachyurus) foi estudada entre 1998 e 2002 na Estação Ecológica de Itirapina, Estado de São Paulo, incluindo estimativas de número de presas e biomassa ingerida. Um total de 325 amostras fecais foi coletado na área de estudo. A espécie pode ser considerada onívora, com uma dieta variada incluindo 68 espécies ou morfo-espécies de frutos e animais. Os tatus (Dasypodidae), fruta-de-lobo (Solanum lycocarpum) e pequenos mamíferos (principalmente Clyomys bishopi) constituíram a base da dieta, com 72,8% do total de biomassa consumida (185.323,4 g). Por outro lado, em termos de freqüência de ocorrência, apenas os pequenos mamíferos e outros frutos compreenderam 43,4% do total de ocorrências (N = 1.054). Presas animais entre 0,01 e 0,1 Kg foram as mais consumidas, representando 44,2 % do total de 507 indivíduos capturados. O lobo-guará apresenta oportunismo sazonal pelo menos para frutos e insetos, a julgar pela variação no consumo desses itens nas diferentes estações do ano. O alto consumo de frutos e animais provenientes do cerrado deve ser levado em conta em planos futuros de manejo da espécie. Palavras-chave:Chrysocyon brachyurus, lobo-guará, cerrado, campo, ecologia alimentar, dieta, Brasil.

Cerradomys goytaca is a cricetid rodent endemic to “Restinga” formations from southeastern Atlantic Forest. It is known from only five localities, and it is considered endangered of extinction. Herein, we furnish new data on C. goytaca from an additional locality in Rio de Janeiro state. The present record provides new data on habitat and represents the westernmost geographic limit of this poorly known species.