Mammillaria pilcayensis Bravo in Anales Inst. Biol. Univ. Nac. México 28: 37. 1958
Mammillaria pilcayensis in Anales Inst. Biol. Univ. Nac. México 28: 37. 1958
is basionym for Mammillaria spinosissima subsp. pilcayensis, Mammillaria Postscripts 6: 8. 1997