This name is a synonym of Sulcorebutia arenacea (Cárdenas) F. Ritter.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50204346) with original publication details: Sukkulentenkunde 7/8: 104 1963.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:247835-2.
This name was in version 1 of The Plant List, record tro-50204346, and has not been changed.