Contribution to lichen diversity of Eastern Pyrenees: lichens from Ribera del Catllar (Ripollès, Catalonia, Spain). The survey on the lichen diversity from Ribera del Catllar (Ripollès) has yield a catalogue of 193 taxa. Among them, one taxon is newly reported for the Iberian Peninsula (Aspicilia spermatomanes), and nine taxa are novel for Catalonia (Candelariella efflorescens, Lecidea swartzioidea, Lepraria borealis, Rhizocarpon copelandii, R. simillimum, R. sublavatum, Rinodina malangica, Stereocaulon botryosum and Xylographa trunciseda). To highlight the presence of Nephroma parile, a species listed as vulnerable in the Catalan catalog of menaced flora. The specific composition from the examined sites is highly heterogeneous; indeed, some localities do not share any taxa at all. The variability in species composition is more notorious in sites located in mixed habitats and meadows, while those sites from forest habitats show less variability. The heterogeneity within species composition is higher in sites from the montane belt than localities placed in the subalpine belt. On the other hand, abundance of functional traits follows an opposite pattern, being more similar between localities. In addition, there are not significant differences when considering the sort of habitat or the location on altitudinal belts. Lichen communities, despite their heterogeneity in terms of species composition, have developed closer adaptations to environmental conditions indistinctly of their location. Key words: distribution, functional traits, Iberian Peninsula.