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Albu, V. & Metzler, E. 2004. Lepidoptera of North America. 5. Contributions to the Knowledge of Southern West Virginia Lepidoptera. In: Contributions of the C. P. Gillette Museum of Arthropod Diversity Colorado State University. - — :1-82.
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A small linear mine on the upperside of the leaf, enlarged into an elongate blotch, 7-8 mm long and 2 mm or less wide, which becomes tentiform, resembling a minute Phyllonorycter mine.
