Checklist of lichens in the Argentine Gran Chaco ecoregion

This paper aims to contribute to the knowledge of lichen diversity from the Argentine Gran Chaco (AGC), which is considered one of the three ecoregions with the highest biodiversity of Argentina and a key area for biodiversity conservation. For this, about 110 articles since 1950 were consulted, and all available information about lichens recorded in the ecoregion was gathered. The first checklist with lichens cited so far in the AGC was made, which includes a total of 442 species and infraspecific taxa distributed among 140 genera, 50 families, and 27 orders. This comprehensive checklist summarizes the current knowledge of lichen diversity in the AGC and constitutes an essential baseline for future studies.