Bulbophyllum fenestratum is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Dendrobieae, subtribe: Dendrobiinae,  
Genus Bulbophyllum   section: Cirrhopetalum 
Infraspecific taxa recognized within Bulbophyllum fenestratum: infraspecific taxa
This species is found in Pen. Thailand to W. Malesia.