This name is a synonym of Gymnocalycium denudatum (Link & Otto) Pfeiff. ex Mittler.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Cact. 3: 162 1922.
This name was in version 1 of The Plant List, record kew-2835695, and has not been changed.