''Thudaca ophiosema'' is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

in the family

Depressariidae Depressariidae is a family of moths. It was formerly treated as a subfamily of Gelechiidae, but is now recognised as a separate family, comprising about 2,300 species worldwide. Subfamilies Depressariidae consists of ten subfamilies: * Acriinae ...

. It was described by

Edward Meyrick Edward Meyrick (25 November 1854 – 31 March 1938) was an English schoolmaster and amateur entomologist. He was an expert on microlepidoptera and some consider him one of the founders of modern microlepidoptera systematics. Life and work Ed ...

in 1893. It is found in

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

, where it has been recorded from

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the opposite wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingsp ...

is about 16 mm. The forewings are light ochreous brown, somewhat darker posteriorly. There is a white costal streak from near the base to four-fifths, interrupted by an inwardly oblique bar of ground colour about the middle. There is a white spot on the inner margin at one-third, preceded by a dark fuscous suffusion, and two small cloudy white spots on the inner margin at two-thirds. There is a moderate white median longitudinal streak from the base to four-fifths, sinuate upwards in the middle, and with the extremity bent upwards, partially margined with dark fuscous suffusion, which is continued posteriorly as a broad band to the hindmargin. There is a moderate irregular-edged white submarginal streak from the apex to the anal angle. The hindwings are ochreous whitish.''Proceedings of the Linnean Society of New South Wales'' (2) 7 (4): 576

References

Moths described in 1893 Thudaca Taxa named by Edward Meyrick {{Hypertrophinae-stub