This name is a synonym of Rebutia marsoneri Werderm..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50134574) with original publication details: Sukkulentenkunde 2: 23 1948.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:218139-2.
This name was in version 1 of The Plant List, record tro-50134574, and has not been changed.