Gymnocalycium fidaianum (Backeb.) Hutchison in Cact. Succ. J. (Los Angeles) 29: 11. 1957 Gymnocalycium fidaianum (Backeb.) Hutchison in Cact. Succ. J. (Los Angeles) 29: 11. 1957is new combination for Echinocactus fidaianus Backeb. in Kakteen-Freund 1: 104, 117. 1933Taxon for this nameGymnocalycium fidaianum (Backeb.) Hutchison