Gymnocalycium dubniorum Halda & Milt in Acta Mus. Richnov., Sect. Nat., 13: 16. 2006
Gymnocalycium dubniorum in Acta Mus. Richnov., Sect. Nat., 13: 16. 2006
is basionym for Gymnocalycium chubutense var. dubniorum in Gymnocalycium 21 (Sonderausgabe): 816. 2008