Catasetum tenebrosum is a species in the Catasetum genus. This name is accepted name for the species in the family Orchidaceae subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, . It is in the subgenus Catasetum section: Isoceras subsection: Convergentes . This species is found in SE. Ecuador to Peru and Brazil (Pará).