Mammillaria densispina (J.M. Coult.) Orcutt, Cactography 7. 1926 sec. Hunt 2016
- ≡Cactus densispinus J.M. Coult. in Contr. U.S. Natl. Herb. 3: 96. 1894 syn. sec. Guzmán & al. 2003
- =Neomammillaria densispina (J.M. Coult.) Britton & Rose, Cactaceae (Britton & Rose) 4: 119. 1923 syn. sec. Guzmán & al. 2003
- =Leptocladodia densispina (J.M. Coult.) Buxb. in Oesterr. Bot. Z. 101: 601. 1954 syn. sec. Guzmán & al. 2003
- =Mammillaria buxbaumiana Repp., Gatt. Mammillaria: 63. 1987 syn. sec. Guzmán & al. 2003
- =Krainzia densispina (J.M. Coult.) Doweld in Sukkulenty 3: 43. 2000 syn. sec. Guzmán & al. 2003