Tasmantrix lunaris is a moth of the family Micropterigidae. It is known from eastern Australia, where it is known from two localities in the southern coastal forests of New South Wales.Micropterigidae (Lepidoptera) of the Southwestern Pacific: a revision with the establishment of five new genera from Australia, New Caledonia and New Zealand
The forewing length is 3.2 mm for males and 3.1 mm for females.
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