Melocactus trujillensis Rauh & Backeb., Descr. Cact. Nov. 1: 36. 1957 ["1956"] Melocactus trujillensis Rauh & Backeb., Descr. Cact. Nov. 1: 36. 1957 ["1956"]Taxon for this nameMelocactus trujillensis Rauh & Backeb.