Brechmorhoga goncalvensis sp. nov. (♂ holotype: Brazil, Minas Gerais, Gonçalves, APA Fernão Dias, 22.7363 S, 45.8191 N, 1 670 m a.s.l., 14-x-2019, deposited in coll. UFMG) is described and diagnosed based on specimens collected in Minas Gerais and Rio de Janeiro states, south-eastern Brazil. The new species can easily be separated from other congeners by the posterior hamule with a truncated base bearing two basal projections, cercus with a carina of 4–5 small denticles on the apical ventral margin, and its unique body coloration of double stripes on each side of the abdominal segments. Further key words. Dragonfly, Anisoptera, South America, Brechmorhoga tepeaca