Mammillaria petrophila subsp. baxteriana (H.E. Gates) D.R. Hunt, Mammillaria Postscripts 7: 3. 1998 sec. Hunt 2016
- ≡Neomammillaria baxteriana H.E. Gates in Cact. Succ. J. (Los Angeles) 6: 3. 1934 syn. sec. Guzmán & al. 2003
- =Neomammillaria marshalliana H.E. Gates in Cact. Succ. J. (Los Angeles) 6: 4. 1934 syn. sec. Guzmán & al. 2003
- =Neomammillaria pacifica H.E. Gates in Cact. Succ. J. (Los Angeles) 6: 5. 1934 syn. sec. Guzmán & al. 2003
- =Mammillaria baxteriana (H.E. Gates) Boed. ex Backeb. & F.M. Knuth, Kaktus-ABC: 398. 1936 syn. sec. Guzmán & al. 2003
- =Mammillaria marshalliana (H.E. Gates) Boed. ex Backeb. & F.M. Knuth, Kaktus-ABC: 398. 1936 syn. sec. Guzmán & al. 2003
- =Mammillaria pacifica (H.E. Gates) Boed. ex Backeb. & F.M. Knuth, Kaktus-ABC: 398. 1936 syn. sec. Guzmán & al. 2003