Mammillaria mercadensis Patoni, Alianza Cient. Univ. 1: 54. 1908 sec. Hunt 2016
- =Mammillaria ocamponis Ochot. in Bol. Dirección Estud. Biol. 2: 355. 1918 syn. sec. Guzmán & al. 2003
- =Neomammillaria mercadensis (Patoni) Britton & Rose, Cactaceae (Britton & Rose) 4: 145. 1923 syn. sec. Guzmán & al. 2003
- =Chilita mercadensis (Patoni) Orcutt, Cactography 2. 1926 syn. sec. Guzmán & al. 2003
- =Escobariopsis mercadensis (Patoni) Doweld in Sukkulenty 3: 41. 2000 syn. sec. Guzmán & al. 2003