Mitragomphus ganzanus Needham, 1944, a geographically misplaced dragonfly, is a junior synonym of Gomphidia kirschii Selys, 1878 (Odonata: Gomphidae).

Based on comparison of specimens and descriptions, Mitragomphus ganzanus Needham, 1944, described from Braganza [Bragança], Pará State, Brazil, and known only from the holotype, is found to be a junior synonym of Gomphidia kirschii Selys, 1878, a species from the Philippines. The monotypic genus Mitragomphus Needham, 1944, is synonymized with the genus Gomphidia Selys, 1854.