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A review of the Bornean Pipistrellus (Mammalia : Chiroptera)

— Nine species of Pipistrellus are currently known from Borneo of which P. imbricatus and P. petersi are here reported for the first time. None of them is very well known ; only P. stenopterus has been reported from more than three localities and five species are known from only a single locality. To facilitate identification of future specimens, this paper summarizes the distinguishing features of each species and includes diagrams of skull shape, dentition and tragus shape.