[in Spanish with English abstract: ] Background and aims: A revision of the genus Emmanuelia in northern Argentina is presented, in order to increase the knowledge of this group of lichens in the country. The species belonging to this genus, recently described, were previously within Lobaria. M&M: Samples deposited in the CTES herbarium and collected in the forests of northern Argentina were studied. Morphological and anatomical analyses were carried out using a stereoscopic and optical microscope, and chemical analysis of the material was performed with spot colour reactions with 10% potassium hydroxide (K), sodium hypochlorite (C), and K followed by C (KC), and thin layer chromatography (TLC). Results: Through the morphoanatomical and chemical studies of the material deposited in the CTES herbarium, the presence of three species in the north of Argentina was determined. Emmanuelia elaeodes and E. erosa are recorded for the first time for the country, and E. tenuis extends its distribution for Corrientes province. Each species is described and photographed, and a dichotomous key to the species present in Argentina is provided. Conclusions: This work increases and updates the knowledge about this group of lichens in Argentina, with the addition of species previously not known for the country. Furthermore, it was possible to confirm the presence of E. tenuis and to determine that E. cuprea y E. patinifera would not be in Argentina. Key words: Diversity, Lobaria, Lobarioideae, Peltigeraceae, rainforests.