The monotypic new genus Barriella is described on the basis of B. longicornoides Opitz, new species, from Brazil. I postulate that Barriella represents a descendant of a Gondwanian stock that also yielded such Old World genera as Stigmatium Grey and Clerus Fabricius. The potential relationships of B. longicornoides Opitz to Chilean genera such as Natalis Laporte, Notocymatodera Schenkling, Eurymetomorphon Pic, and Ctenoclerus Solervicens, and to the New World genera Placopterus Wolcott and Enoclerus Gahan, is also discussed. A synonymy involving Notocymatodera modesta (Spinola) and Notocymatodera dimidiata (Germar) is suggested.