This name is a synonym of Echinopsis thionantha (Speg.) D.R.Hunt.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Taxon 13: 144 1964.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1616-2.
This name was in version 1 of The Plant List, record kew-2614469.