Gynnidomorpha permixtana, the coast conch, is a moth of the family Tortricidae.

The species was first described in 1775 by the Austrian lepidopterists, Michael Denis and Ignaz Schiffermüller.

It is found in China (Anhui, Beijing, Fujian, Gansu, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Liaoning, Ningxia, Shaanxi, Shandong, Shanghai, Shanxi, Sichuan, Tianjin, Xizang, Zhejiang), Afghanistan, Iran, Japan, Korea, Mongolia, Russia, Sri Lanka and Europe.

[2][3][4] The habitat consists of waste ground, damp heathland and mosses.

Very similar to Phalonidia manniana Fischer von Röslerstamm, 1839.