Abstract
The following species of the genus Obrium Dejean, 1821 are currently listed for Argentina: O. bifasciatum Martins and Galileo, 2003; O. cantharinum cantharinum (Linnaeus, 1767); O. cicatricosum Gounelle, 1909; O. multifarium Berg, 1889; O. trifasciatum Bosq, 1951; O. vicinum Gounelle, 1909. Two new species are described: O. mimicum and O. trilobatum. The species are illustrated; a key to species of the genus occurring in Argentina is provided. The geographic distribution and the host plants in the country are mentioned.
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