This name is a synonym of Gymnocalycium mostii subsp. valnicekianum (Jajó) Mereg. & G.J.Charles.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Revista Centro Estud. Farm. reimpr. 2(6): 22 1926.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:115373-2.
This name was in version 1 of The Plant List, record kew-2835583.