Gymnocalycium armatum F.Ritter, Kakteen Südamerika 2: 662. 1980
Gymnocalycium armatum, Kakteen Südamerika 2: 662. 1980
is basionym for Gymnocalycium cardenasianum f. armatum in Gymnocalycium 12: 308. 1999
is basionym for Gymnocalycium cardenasianum subsp. armatum in Kaktus-Klub, n.s. 5(1): 50. 2021
is basionym for Gymnocalycium spegazzinii subsp. armatum in Acta Mus. Richnov., Sect. Nat., 9: 65. 2002