I took sometime to reach the name of the species of this specimen, but at the end I think that I succeeded, at least judging by the perfect analogy of my photos with those presented either in Irish lichens as well as in Stridvall for the species Degelia atlantica_. The short description given in the first of these references also agrees. I don't know if there is any problem related to the classification. The fact is that no discription, even for the genus, appear in CNALH and no photos are presented in the website Sharnoff photosindex.html.