Kobayashi, S., Johns, C. A. & Kawahara, A. Y. 2021. Revision of the Hawaiian endemic leaf-mining moth genus Philodoria Walsingham (Lepidoptera: Gracillariidae): its conservation status, host plants and descriptions of thirteen new species. - Zootaxa 4944(1):1-175.
Kobayashi, S., Johns, C. A. & Kawahara, A. Y. 2021. Revision of the Hawaiian endemic leaf-mining moth genus Philodoria Walsingham (Lepidoptera: Gracillariidae): its conservation status, host plants and descriptions of thirteen new species. - Zootaxa 4944(1):1-175.
Swezey, O. H. 1915. New species of Hawaiian moths. - Proceedings of the Hawaiian Entomological Society 3(2):93-97.
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A rather slender, widening serpentine mine on the underside of the leaf, enlarging into a blotch. The record of Urera kaalae (Zimmerman 1978: 691) refers to Philodoria opuhe (see Kobayashi et al. 2021: 116).