This name is a synonym of Oncidium ottonis Schltr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 336118) with original publication details: Orquídea (Rio de Janeiro) 19: 124 1957.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:173963-2.
This name was in version 1 of The Plant List, record kew-336118.