Mammillaria dioica K. Brandegee subsp. dioica in Erythea 5: 115. 1897 sec. Hunt 2016
- =Mammillaria fordii Orcutt in W. Amer. Sci. 13: 49. 1902 syn. sec. Guzmán & al. 2003
- =Neomammillaria dioica (K. Brandegee) Britton & Rose, Cactaceae (Britton & Rose) 4: 158. 1923 syn. sec. Guzmán & al. 2003
- =Mammillaria incerta Parish, Fl. Calif. 2: 549. 1936 syn. sec. Guzmán & al. 2003
- =Mammillaria dioica var. incerta (Parish) Munz in Aliso 4: 94. 1958 syn. sec. Guzmán & al. 2003
- =Mammillaria dioica f. incerta (Parish) Neutel. in Succulenta (Netherlands) 65: 119. 1986 syn. sec. Guzmán & al. 2003
- =Cochemiea dioica (K. Brandegee) Doweld in Sukkulenty 3: 38. 2000 syn. sec. Guzmán & al. 2003