Alfred L. Gardner Paul M. Velazco 2012 We report the discovery of a new species of <i>Lophostoma</i> from Panama, which we name <i>L. kalkoae</i>. This new species resembles <i>L. carrikeri</i> and <i>L. yasuni</i> in possessing a white venter, but is distinguishable from both by external and cranial characteristics. The new species is similar in size to <i>L. carrikeri</i> and <i>L. schulzi</i>. <i>Lophostoma</i> sp. nov. can be most easily recognized by its combination of white venter, postauricular patches connected by a thin line of pale hair to the white fur on the chest, elongated clitoris and swollen labia, less strongly developed lateral projection of mastoid processes, well-marked indentation on the lingual cingulum of the upper canine, well-developed P3, well-developed posterior lingual cusp on the cingulum of P4, and parastyle absent on M1 and M2. We present a dichotomous key for the genus <i>Lophostoma</i> and a map showing all the localities where white-bellied <i>Lophostoma</i> have been recorded. application/pdf 10.1644/11-MAMM-A-217.1 en American Society of Mammalogists A new species of Lophostoma d'Orbigny, 1836 (Chiroptera: Phyllostomidae) from Panama article