Ritterocactus crassigibbus (F.Ritter) Doweld in Sukkulenty 2(2): 22. 1999 Ritterocactus crassigibbus (F.Ritter) Doweld in Sukkulenty 2(2): 22. 1999is new combination for Notocactus crassigibbus F.Ritter in Succulenta (Netherlands) 49: 108. 1970Taxon for this nameRitterocactus crassigibbus (F.Ritter) Doweld