Identification is based on the detailed description of the callus having two parallel, thick keels, the basal portion with a high rounded base and obliquely triangular leading edge. There are two erect oblong, obtuse-rounded teeth on the apical portion which are taller than the basal portion. These teeth appear distinctly in photos of B. wageneri found in orchidroots.com, IOSPE and OW. This plant is an excellent match to the illustration in Garay and Dunsterville, Vol. 1 of the Venezuelan Orchids Illustrated. There is also a good description of B. wageneri by Baker and Baker in the OW.