Cryptolectica ensiformis Wikipedia
Cryptolectica ensiformis is a moth of the Gracillariidae family. It is known from China (Hainan), India, Indonesia (Sulawesi), Japan (Tusima, the Ryukyu Islands, Honshū, Kyūshū, Shikoku) and Thailand.
The wingspan is 9.2–11 mm.
The larvae feed on Quercus acuta and Quercus sessilifolia. They probably mine the leaves of their host plant.