Gymnocalycium pseudomalacocarpum Backeb., Kakteenlex.: 172. 1966 Gymnocalycium pseudomalacocarpum Backeb., Kakteenlex.: 172. 1966is basionym for Gymnocalycium tudae var. pseudomalacocarpus (Backeb.) Donald in Natl. Cact. Succ. J. 26: 100. 1971Taxon for this nameGymnocalycium pseudomalacocarpum Backeb.