Mammillaria heyderi subsp. coahuilensis (Boed.) Lüthy in Taxon. Unters. Gatt. Mammillaria Haw. (Cactac.): 192. 1995
Mammillaria heyderi subsp. coahuilensis in Taxon. Unters. Gatt. Mammillaria Haw. (Cactac.): 192. 1995
is new combination for Porfiria coahuilensis in Z. Sukkulentenk. 2(13): 210–213. 1926