The majority of phyllostomine bats (Chiroptera: Phyllostomidae) are considered to be primarily insectivorous and carnivorous. However, the Phyllostomus—Phylloderma clade is an exception; Phyllostomus discolor and P. hastatus are known to feed in large part on fruit and nectar. Observations of the consumption of fruits of Gurania spp. (Cucurbitaceae) by Phylloderma stenops in Costa Rican lowland wet forest suggest a similar diet for this poorly known, closely related species. Furthermore, the survival and germination of ingested seeds indicate that this bat may be an efficacious seed disperser for its food plants.