Tridrepana unispina is a moth in the family Drepanidae. It is found in China (Fujian, Guangdong, Chongqing, Sichuan, Yunnan), Japan and Taiwan.
The wingspan is 27–42 mm. Adults are on wing in June.Oriental Butterflies and Moths
The larvae feed on the leaves of Castanopsis formosana.Larval Morphology and Host Plants of Drepanidea (Lepidoptera: Drepanidae) in Southern Taiwan
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