Thomas' Mastiff bat, Eumops maurus (Thomas, 1901) is known from northern South America in Ecuador, Venezuela and Guiana and so it probably occurs in Brazil, yet it has not been reported. Here, we present the first record for E. maurus in Brazil. Captures were from the Brazilian states of Tocantins and Goiás (northern and midwestern Cerrado region of the country), and São Paulo (southeastern Brazil, Atlantic Forest). In the first two locations, all bats were roosting in palm leaves while in the later location, a single animal was found alive in a 15th-storey apartment in the city of São Paulo. This bat inhabits savannas with swamps dominated by the palm Mauritia flexuosa (buriti) and gallery forests. This record is the first of E. maurus in an urban area. Brazilian specimens are apparently larger than those from northern South America.
Geographic distribution; insectivorous bat
