Discocactus magnimammus Buining & Brederoo in Kakteen And. Sukk. 25: 242. 1974
Discocactus magnimammus in Kakteen And. Sukk. 25: 242. 1974
is basionym for Discocactus hartmannii var. magnimammus in Kakteen And. Sukk. 36: 23. 1985
is basionym for Discocactus hartmannii subsp. magnimammus in Kakteen And. Sukk. 46: 64. 1995
is basionym for Discocactus heptacanthus subsp. magnimammus in Bradleya 9: 86. 1991