Tasmantrix nigrocornis is a moth of the family Micropterigidae. It is known from eastern Australia, in coastal rainforests of southern New South Wales from Mount Keira to Mount Dromedary.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 3.4 mm for males.
Etymology The species name is derived from the Latin niger- (meaning black) and -cornis (meaning horn) with reference to the striking black antennae of this species.
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