Claim: The Macrothyatira flavimargo is moth mostly found in western China that has a purplish-brown spot at the base of the wing extending over the thorax.
Evidence: Macrothyatira flavimargo is a moth in the family Drepanidae. It is found in western China (Gansu, Sichuan, Yunnan). There is a purplish-brown spot at the base of the wing, this colour also extends over the thorax.