This name is a synonym of Gymnocalycium pflanzii (Vaupel) Werderm..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Cact. Succ. J. (Los Angeles) 38: 146 1966.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:115376-2.
This name was in version 1 of The Plant List, record kew-2835588, and has not been changed.