Monotypic butterfly genus in family Lycaenidae
 ;templatestyles src="Template:Taxobox/core/styles.css" / ;
Thermozephyrus ataxus, the wonderful hairstreak, is a small butterfly found from India to Japan that belongs to the lycaenids or blues family.
Taxonomy.
The butterfly was previously classified as "Thecla ataxus" Doubleday. It is also presently classified as "Chrysozephyrus ataxus".
Range.
The species occurs in Murree (Pakistan), and in India from Jammu and Kashmir to Kumaon and in the Naga Hills. In general, the range extends from the western Himalayas to China and Japan.