Vatricania guentheri (Kupper) Backeb. in Cact. Succ. J. (Los Angeles) 23: 149. 1951 Vatricania guentheri (Kupper) Backeb. in Cact. Succ. J. (Los Angeles) 23: 149. 1951is new combination for Cephalocereus guentheri Kupper in Monatsschr. Deutsch. Kakteen-Ges. 3: 159. 1931This name is not assigned to any taxon.