Gymnocalycium riograndense Cárdenas in Kakteen And. Sukk. 9(2): 24. 1958
Gymnocalycium riograndense in Kakteen And. Sukk. 9(2): 24. 1958
is basionym for Gymnocalycium zegarrae var. riograndense in Gymnocalycium 13: 353. 2000
is basionym for Gymnocalycium pflanzii var. riograndense in Natl. Cact. Succ. J. 26: 100. 1971
is basionym for Gymnocalycium zegarrae subsp. riograndense in Gymnocalycium 13: 353. 2000