The ability of Hylaeogena thoracica Waterhouse, 1889 (Coleoptera: Buprestidae) to induce galls on Amphilophium paniculatum (L.) H.B.K (Bignoniaceae) is reported here. Species of Hylaeogena Obenberger, 1923 are associated with vines of the family Bignoniaceae as leafminers, therefore this report represents the first record of the genus acting as a gall inducer. The effect of the inquiline Philides anthonomoides Champion, 1906 (Coleoptera: Curculionidae, Conoderinae) on gall morphology is also described. Most Neotropical conoderines are associated with tree falls and are assumed to be wood-borers. This represents the first report of the species acting as an inquiline in galls. Four parasitoid species belonging to three families of Hymenoptera that emerged from the galls are also reported.