Promenesta triacmopa is a moth in the Depressariidae family. It was described by Edward Meyrick in 1931. It is found in Paraguay.
The wingspan is about 15 mm. The forewings are orange yellow with the plical stigma minute and fuscous, the second discal forming a suffused round fuscous spot with a three-pointed whitish centre. There are faint minute brownish terminal dots. The hindwings are grey whitish, with the termen slightly greyer suffused.
References
Promenesta triacmopa Wikipedia(Text) CC BY-SA