Deoptilia heptadeta

Deoptilia heptadeta is a moth of the family Gracillariidae. It is known from Japan (the Ryukyu Islands, Kyūshū, Shikoku, Honshū, Tusima, the Amami Islands) and Taiwan.

The wingspan is 6.3–8.3 mm.

The larvae feed on Mallotus japonicus. They mine the leaves of their host plant.