Dorcacerus barbatus is a species of beetle in the family Cerambycidae, the only species in the genus Dorcacerus.

 Dorcacerus barbatus can reach a length of . In males antennae are longer than the body.

It feeds on Prosopis flexuosa (Leguminosae) and on the invasive weed Lantana camara (Verbenaceae) ad it is considered as a potential biocontrol agent.

Distribution: This species can be found in forests of Mexico, Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Ecuador, Peru, Brazil, Suriname, French Guiana, Guyana, Bolivia, Paraguay and Argentina.