Campanulorchis thao is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Podochileae, subtribe: Eriinae,  
Genus Campanulorchis   section: Campanulorchis 
Infraspecific taxa recognized within Campanulorchis thao: infraspecific taxa
This species is found in S. Hainan to Vietnam.