This name is a synonym of Espostoa guentheri (Kupper) Buxb..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Monatsschr. Deutsch. Kakteen-Ges. 3: 159 1931.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:52152-2.
This name was in version 1 of The Plant List, record kew-2709506, and has not been changed.