Iressa is a genus of cosmet moths (family Cosmopterigidae). It belongs to subfamily Cosmopteriginae.
They are characterized mainly by their wing venation: in the forewings, vein 1b is not forked and veins 2-4 are separate, while veins 6-8 are not; veins 6 and 7 are stalked and arise from vein 8. In addition, the scape is short and bears a comb.Clarke (1986)
This genus contains only 3 known species: Iressa microsema J.F.G.Clarke, 1986 Iressa neoleuca J.F.G.Clarke, 1971 Iressa triformis (Meyrick 1927)
Footnotes
References (1986): Pyralidae and Microlepidoptera of the Marquesas Archipelago. Smithsonian Contributions to Zoology 416: 1–485. PDF fulltext (214 MB!)