Melocactus onychacanthus F.Ritter in Succulenta (Netherlands) 46: 40. 1967
Melocactus onychacanthus in Succulenta (Netherlands) 46: 40. 1967
is basionym for Melocactus bellavistensis subsp. onychacanthus in Bradleya 9: 66. 1991
Melocactus onychacanthus in Succulenta (Netherlands) 46: 40. 1967
Taxon for this name