Caloptilia protiella is a moth of the family Gracillariidae. It is known from China (Hong Kong, Guangdong, Jiangxi and Hainan), India, Java, Japan (Kyūshū and the Ryukyu Islands), Malaysia and Thailand.[2]
The wingspan is 10.5-12.5 mm.[3]
The larvae feed on Anacardium occidentale, Toxicodendron succedaneum, Toxicodendron sylvestre and Protium javanicum. They probably mine the leaves of their host plant.