Hyposmocoma petalifera is a species of moth of the family Cosmopterigidae. It is endemic to the Hawaiian island of Maui. The type locality is Olinda, where it was collected at an elevation of 4000feet.
. Elwood Zimmerman . 1978 . Insects of Hawaii . 9 Microlepidoptera . The University Press of Hawaii, Honolulu. 10125/7338 .