Discocactus heptacanthus subsp. melanochlorus (Buining & Brederoo) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 103. 19
Discocactus heptacanthus subsp. melanochlorus in Kakteen And. Sukk. 44: 103. 1993
is new combination for Discocactus melanochlorus, Discocactus: 135. 1976