Hyposmocoma waikamoi is a species of moth of the family Cosmopterigidae. It is endemic to Maui.

The wingspan is 10.4–11 mm for males and 9.8–9.9 mm for females.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

Etymology The specific name is derived from the Nature Conservancy reserve on east Maui to which the species is apparently restricted.

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