Echinocactus sigelianus Schick in Möller's Deutsche Gärt.-Zeitung 38(26): 201. 1923
Echinocactus sigelianus in Möller's Deutsche Gärt.-Zeitung 38(26): 201. 1923
is basionym for Gymnocalycium sigelianum in Revista Centro Estud. Farm. reimpr. 2(6): 16. 1926
is basionym for Gymnocalycium capillense var. sigelianum in Gymnocalycium 16: 497. 2003