Philonome euryarga is a species of moth of the family Tineidae. It is found in Guyana and French Guiana.
The length of the forewings is about 2.7 mm. The forewings are reddish brown with a brown costa. The longitudinal fascia is white, spanning the entire costal area except the costa. The lower margin is sinuous, accompanied with a narrow, dark brown line. The dorsal bar is white and found at the basal third of the dorsum. It is dentiform and accompanied with a dark brown bar along the upper margin. The marginal area is dark brown. The hindwings are pale greyish orange.Revision of the genus Philonome Chambers and its proposed reassignment to the family Tineidae (Lepidoptera, Tineoidea)
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