A new species of Omalodini, Omalodes atacamanus sp. nov., is described from Chile. A redefinition of Omalodini is proposed and an identification key to the genera is provided. The new species can be distinguished from other species of Omalodes mainly by all tibiae having a row of setae on outer submarginal region. Omalodini sensu nov. is herein restricted to a lineage of Ebonius Lewis, 1885 and Omalodes Dejean, 1833. The tribe has known distribution across Latin America with some species reaching the southern USA.