Hyposmocoma fuscopurpurata is a species of moth of the family Cosmopterigidae. It was first described by Elwood Zimmerman in 1978. It is endemic to the Hawaiian island of Oahu. The type locality is Mount Olympus.
. Elwood Zimmerman . 1978 . Insects of Hawaii . 9 Microlepidoptera . The University Press of Hawaii, Honolulu. 10125/7338 .