Antaeotricha ianthina is a moth in the family Depressariidae. It was described by Thomas de Grey, 6th Baron Walsingham in 1913. It is found in Panama.[1]
The wingspan is about 28 mm. The forewings are unicolorous rich shining purple, with greenish reflections at the extreme base, the costa and dorsum to two-thirds perhaps somewhat more richly coloured than the remainder of the wing. The hindwings are dark tawny grey, with some slight greenish and purplish reflections and a long pencil of pale ochreous hairs from near the base of the costa above.[2]