''Thudaca heterastis'' 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 16–20 mm. The forewings are snow white with a moderate orange streak immediately beneath the costa from the base to the costa near the apex, sometimes obsolete beyond two-thirds. There is a rather broad orange streak along the inner margin to the anal angle, becoming suddenly subdorsal on the basal fourth and not quite reaching the base, usually more or less wholly suffused with dark fuscous, posteriorly attenuated. There is a transverse orange streak suffused with dark fuscous, from the subcostal streak at three-fifths to the middle of the dorsal streak, forming an obtuse-angled zigzag in the middle, sometimes interrupted or wholly absent. A straight orange streak, suffused with dark fuscous, is found from the costa near the apex to the anal angle, sometimes widely interrupted or visible at the extremities only. There are some dark fuscous scales on the hindmargin. The hindwings are pale whitish grey, faintly yellowish tinged.''Proceedings of the Linnean Society of New South Wales'' (2) 7 (4): 571

References

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