This name is a synonym of Mammillaria dioica subsp. estebanensis (G.E. Linds.) D.R. Hunt.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50125787) with original publication details: Cact. Succ. J. (Los Angeles) 39: 31 1967.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:280341-2.
This name was in version 1 of The Plant List, record tro-50125787, and has not been changed.