Distribution and abundance of corticolous species of the genus Ulota (Orthotrichaceae, Musci) in the NW Iberian Peninsula

Based on the study of more than 100 forests from the northwestern part of t he Iberian Peninsula, the distribution and abundance of Ulota coarctata, U. bruchii and U. crispa are mapped and discussed. Ulota coarctata is scarce and its distribution confirms its affinity for montane environments, while Ulota bruchii and U. crispa are frequent in the study area and have been co mmonly found growing together. Although both of the latter species show an oceanic-montane tendency, data on the abundance suggest that oceanic affini ty is stronger in U. crispa than in U. bruchii.