Notocactus mueller-melchersii Frič ex Backeb., Kaktus-ABC: 415. 1936 ["1935"]
Notocactus mueller-melchersii, Kaktus-ABC: 415. 1936 ["1935"]
is basionym for Parodia mueller-melchersii in Bradleya 5: 93. 1987
is basionym for Ritterocactus mueller-melchersii in Sukkulenty 2(2): 22. 1999