Madre Selva field station, Depto Loreto, Peru. January 16, 2013.
B. altamazonica is likely a species complex; to date I can distinguish it from one other species (B. peruvianus). There were ants moving about near this little salamander, and as I took pictures it snapped them up if they got too close.
Peru 2013 Flickr album is here.
HerpMapper records for this species are here.