Echinocactus sellowii var. macrogonus Arechav. in Anales Mus. Nac. Montevideo 5: 232. 1905
Echinocactus sellowii var. macrogonus in Anales Mus. Nac. Montevideo 5: 232. 1905
is basionym for Echinocactus sellowii f. macrogonus, Kakteen: 183. 1926
is basionym for Wigginsia macrogona in Taxon 13(6): 210. 1964
is basionym for Malacocarpus macrogonus in Revista Sudamer. Bot. 7: 216. 1943
is basionym for Notocactus sellowii f. macrogonus in Internoto 15(3): 89. 1994
is basionym for Notocactus macrogonus in Kakteen Sukk. 14: 60. 1980 ["1979"]