Mammillaria petterssonii Hildm. in Deutsche Gart.-Zeitung 5: 185. 1886 sec. Hunt 2016
- =Mammillaria obscura Hildm. in Monatsschr. Kakteenk. 1: 52. 1891 syn. sec. Guzmán & al. 2003
- =Neomammillaria petterssonii (Hildm.) Britton & Rose, Cactaceae (Britton & Rose) 4: 94. 1923 syn. sec. Guzmán & al. 2003
- =Mammillaria hamiltonhoytea (Bravo) Werderm., Neue Kakteen: 99. 1931 syn. sec. Guzmán & al. 2003
- =Neomammillaria hamiltonhoytea Bravo in Anales Inst. Biol. Univ. Nac. México 2: 130. 1931 syn. sec. Guzmán & al. 2003
- =Mammillaria hamiltonhoytea var. fulvaflora R.T. Craig, Mammillaria Handb.: 78. 1945 syn. sec. Guzmán & al. 2003
- =Mammillaria pilensis Shurly ex Backeb., Cactaceae (Backeberg) 5: 3408. 1961 syn. sec. Guzmán & al. 2003
- =Mammillaria apozolensis Repp., Gatt. Mammillaria: 143. 1987 syn. sec. Guzmán & al. 2003
- =Mammillaria apozolensis var. saltensis Repp., Gatt. Mammillaria: 145. 1987 syn. sec. Guzmán & al. 2003
- =Mammillaria hamiltonhoytea var. pilensis (Shurly ex Backeb.) Repp., Gatt. Mammillaria: 138. 1987 syn. sec. Guzmán & al. 2003
- =Mammillaria huiguerensis Repp., Gatt. Mammillaria: 141. 1987 syn. sec. Guzmán & al. 2003
- =Mammillaria gigantea subsp. hamiltonhoytea (Bravo) Rogoz. & Plein in Mitteilungsbl. Arbeitskreises Mammillarienfr. 27: 144. 2003 syn. sec. Rogozinski & Plein 2003