Mammillaria wrightii subsp. wilcoxii (Toumey ex K.Schum.) D.R.Hunt, Mammillaria Postscripts 6: 5. 1997
Mammillaria wrightii subsp. wilcoxii, Mammillaria Postscripts 6: 5. 1997
is new combination for Mammillaria wilcoxii, Gesamtbeschr. Kakt.: 545. 1897–1899