I see the resemblance to L tenebrosa, but several other species would give similar shape to hybrids, and color could come from the other parent. I'd definitely say it is a hybrid, based on the length of the inflorescence and the number of flowers, and the form of the pseudobulbs and the number of leaves, with something like Laelia anceps or an Encyclia as the other parent. How large is the plant? the flowers?