Echinocactus delaetii K.Schum. in Monatsschr. Kakteenk. 11: 186. 1901
Echinocactus delaetii in Monatsschr. Kakteenk. 11: 186. 1901
is basionym for Gymnocalycium schickendantzii subsp. delaetii in Cactaceae Syst. Init. 20: 18. 2005
is basionym for Gymnocalycium delaetii in Revista Centro Estud. Farm. reimpr. 2(6): 22. 1926