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