Mammillaria rettigiana Boed. in Monatsschr. Deutsch. Kakteen-Ges. 2: 98. 1930 sec. Hunt 2016
- =Mammillaria posseltiana Boed. in Monatsschr. Deutsch. Kakteen-Ges. 4: 99. 1932 syn. sec. Guzmán & al. 2003
- =Mammillaria gilensis Boed. in Jahrb. Deutsch. Kakteen-Ges. 1: 60. 1936 syn. sec. Guzmán & al. 2003
- =Mammillaria flavihamata Backeb., Cactaceae (Backeberg) 6: 3895. 1962 syn. sec. Guzmán & al. 2003
- =Escobariopsis rettigiana (Boed.) Doweld in Sukkulenty 3: 41. 2000 syn. sec. Guzmán & al. 2003