Gymnocalycium kieslingii subsp. castaneum (O.Ferrari) Slaba in Kaktusy (Brno) 48: 55. 2012
Gymnocalycium kieslingii subsp. castaneum in Kaktusy (Brno) 48: 55. 2012
is new combination for Gymnocalycium kieslingii f. castaneum in Cact. Succ. J. (Los Angeles) 57: 246. 1985