This name is a synonym of Gymnocalycium hyptiacanthum subsp. uruguayense (Arechav.) Mereg..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Monatsschr. Kakteenk. 21: 132 1911.
This name was in version 1 of The Plant List, record kew-2781853, and has not been changed.