A new species of Chlamophora Chevrolat, 1837, Chlamophora potyra sp. nov. from São Francisco de Paula, state of Rio Grande do Sul, Brazil is described and illustrated, including characters of male and female genitalia. This new taxa is near to C. opacicollis Harold, 1880, but differs from the latter mainly by the aedeagus and, in females, by the shape of sternite VIII and vaginal palpi. Specimens of C.potyra sp. nov. was collected on inflorescences of Eupatorium inulifolium H.B. & K. (Asteraceae). Herein, Chlamophora mendesi Bechyné, 1951 is considered junior synonym of Chlamophora generosa Clark, 1865.
Alticini; host plant; Neotropical; new synonymy; taxonomy
