Gymnocalycium ritterianum
Gymnocalycium ritterianum in Kakteen And. Sukk. 23(7): 180. 1972 sec. Charles 20091
- ≡Gymnocalycium riteranum in Kakteen And. Sukk. 23: 180. 1972 syn. sec. Charles 20091
- =Gymnocalycium jochumii in Gymnocalycium 18: 605. 2005 syn. sec. Hunt 20162
- =Gymnocalycium ritterianum subsp. acentracanthum in Gymnocalycium 18: 601. 2005 syn. sec. Charles 20093