Morphological and Molecular Identification of the Invasive Xylosandrus crassiusculus (Coleoptera:Curculionidae:Scolytinae) and Its South American Range Extending Into Argentina and Uruguay (Research)

ABSTRACT. The occurrence of the exotic "granulate ambrosia beetle" Xylosandrus crassiusculus (Motschulsky) in Argentina and Uruguay is reported for the first time, documenting expansion in South America. Morphological characters are provided to allow distinction of this species from other similar ambrosia beetles. Molecular identification was also done on the basis of the 50 region of the mitochondrial cytochrome c oxidase I (COI) gene, obtained from a specimen from Argentina and compared with available "barcode" sequences in public databases.