Mammillaria rhodantha subsp. fera-rubra (Schmoll ex R.T. Craig) D.R. Hunt Mammillaria rhodantha subsp. fera-rubra (Schmoll ex R.T. Craig) D.R. Hunt, Mammillaria Postscripts 6: 8. 1997 sec. Hunt 2016≡Mammillaria fera-rubra Schmoll ex R.T. Craig, Mammillaria Handb.: 309. 1945 syn. sec. Guzmán & al. 2003