Bactra optanias is a species of moth of the family Tortricidae first described by Edward Meyrick in 1911.[1] It is found in Papua New Guinea, Australia (Queensland, Norfolk Island),[2] New Zealand, Java, Tahiti, Sri Lanka,[3] New Caledonia, the Caroline Islands, the southern Mariana Islands, Rapa Iti and Micronesia.[4]
The wingspan is 16–20 mm. The forewings are whitish brown or brown, with numerous fine oblique fuscous costal strigulae (fine streaks) and some fuscous dorsal dots, as well as a fuscous terminal line. The hindwings are whitish, with slight greyish suffusion on the terminal edge.[5]
This species inhabits swampy terrain. The larval host species are species in the plant family Cyperaceae. The larvae pupate amongst their host plants.