This name is a synonym of Megastylis gigas (Rchb.f.) Schltr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 28585) with original publication details: Linnaea 41: 56 1876.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:620667-1.
This name was in version 1 of The Plant List, record kew-28585, and has not been changed.