This name is a synonym of Mammillaria senilis Lodd. ex Salm-Dyck.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50185496) with original publication details: Cactaceae 4: 20 1923.
This name was in version 1 of The Plant List, record tro-50185496, and has not been changed.