Ritterocactus meonacanthus (Prestlé) Doweld in Sukkulenty 2(2): 22. 1999 Ritterocactus meonacanthus (Prestlé) Doweld in Sukkulenty 2(2): 22. 1999is new combination for Notocactus meonacanthus Prestlé in Internoto 7(2): 37. 1986Taxon for this nameRitterocactus meonacanthus (Prestlé) Doweld