Notocactus crassigibbus F.Ritter in Succulenta (Netherlands) 49: 108. 1970
Notocactus crassigibbus in Succulenta (Netherlands) 49: 108. 1970
is basionym for Parodia crassigibba in Bradleya 5: 93. 1987
is basionym for Ritterocactus crassigibbus in Sukkulenty 2(2): 22. 1999