Mammillaria formosa subsp. microthele (Muehlenpf. & Tiegel) D.R.Hunt, Mammillaria Postscripts 6: 9. 1997
Mammillaria formosa subsp. microthele, Mammillaria Postscripts 6: 9. 1997
is new combination for Mammillaria microthele in Jahrb. Deutsch. Kakteen-Ges.: 135. 1936
Mammillaria formosa subsp. microthele, Mammillaria Postscripts 6: 9. 1997