Oidaematophorus iwatensis is a moth of the family Pterophoridae that is known from Japan (Honshu), Korea and China.

The wingspan is 26–27 millimetres (1.0–1.1 in)[1] and the length of the forewings is 13–15 millimetres (0.51–0.59 in).

It was formerly listed as a synonym of Oidaematophorus lithodactylus.

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