Terthroptera is a genus of ermine moths (family Yponomeutidae). They belong to the large subfamily Yponomeutinae.
This genus includes a mere two known species from southern Polynesia. They are small moths with wingspans less than 2 cm (1 inch), and are characterized by their 8-veined hindwings, with veins 3 and 4 separate and veins 5 and 6 unstalked.Clarke (1986)
The species are: Terthroptera astochia J.F.G.Clarke, 1986 Terthroptera eremosesia J.F.G.Clarke, 1971
Footnotes
References (1986): Pyralidae and Microlepidoptera of the Marquesas Archipelago. Smithsonian Contributions to Zoology 416: 1-485. PDF fulltext (214 MB!)