Tasmantrix phalaros is a moth of the family Micropterigidae. It is known from eastern Australia in wet, upland eucalypt forests of northern New South Wales from Minyon Falls to Narara.Micropterigidae (Lepidoptera) of the Southwestern Pacific: a revision with the establishment of five new genera from Australia, New Caledonia and New Zealand
The species has dark purple forewings with a length of 3.6 mm for males and 3.5 mm for females, and a wingspan of roughly 0.8 cm
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