There was one illustrations found for epithet suscephalus,-a,-um
 
309466 713251 Oncidium barbatum Lindl. C.F.P. von Martius, A.G. Eichler, I. Urban, Fl. Bras., vol. 3(6): fasicle 128, (Orchidaceae, tribus XVIII - XXII, addenda et emendanda): t. 65 (1905)