Agonopterix antennariella is a moth in the family Depressariidae. It was described by John Frederick Gates Clarke in 1941. It is found in Washington, British Columbia and western Greenland.[1]
The wingspan is 17–24 mm. The forewings are red brown, the scales lightly tipped with carmine. There are two small black discal spots at the basal third, followed by a few cinereous (ash-gray) scales. A white spot, edged with black, is found at the end of the cell. The apical third of the wing is shaded with cinereous. The hindwings are light fuscous.[2]
The larvae feed on Antennaria luzuloides.