A preliminary checklist of the polypore mycota of “Yungas”, subtropical mountain forests of northwestern Argentina, is presented. An intensive search of records
in literature was done, and polypore exsiccatae from that phytogeographic province
kept at the main Argentinean herbaria were studied. A total of 850 specimens were
revised and 111 species were determined. Phellinus laevigatus and Skeletocutis stellae are recorded for the first time in South America; 8 species are new records for Argentina and 31 new records for the region. The new combination Dichomitus hexagonoides is proposed. The complete checklist is available on: http://www.mycotaxon.com/resources/weblists.html.Fil: Robledo, Gerardo Lucio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaFil: Rajchenberg, Mario. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentin