Discocactus zehntneri subsp. petr-halfarii (Zachar) M.R.Santos & M.C.Machado in Phytotaxa 207: 209. 2015
Discocactus zehntneri subsp. petr-halfarii in Phytotaxa 207: 209. 2015
is new combination for Discocactus petr-halfarii in Kaktusy (Brno) 44: 45. 2008