Hyposmocoma papaiili is a species of moth of the family Cosmopterigidae. It is endemic to Maui.
The wingspan is 7.2–8.8 mm for males and 12.6 mm for females.
The larvae have been reared on lichen and fish food.Ecologically and Morphologically Remarkable New Cosmet Moth Species of the Genus Hyposmocoma (Lepidoptera: Cosmopterigidae) Endemic to the Hawaiian Islands, with Reference to the Spectacular Diversity of Larval Cases
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