Oncidium megalous Schltr., Repert. Spec. Nov. Regni Veg. 9(196-198): 30. 1911.
TYPE: Costa Rica. in den Wäldern von Esmeralda, Barba-Massif, blühend im Nov 1892, P. Biolley 7256 (holotype, B, destroyed; designated by Christenson (1996), US, W)