Masdevallia colossus is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Epidendreae, subtribe: Pleurothallidinae,  
Genus Masdevallia   subgenus Masdevallia  section: Coriaceae   subsection: Coriaceae 
Infraspecific taxa recognized within Masdevallia colossus: infraspecific taxa
This species is found in SE. Ecuador to NE. Peru.