Picture taken at Guils-Fontanera, Baixa Cerdanya, Oriental Pyrenees, Catalonia, Spain, on schists,siliceous rock, in places visited by birds,1.400 m. altitude.
Foliose thallus, very adpressed, relatively small (5cm), dark brown colour. Isidia frequent and evident.
See the very distinctive white pseudociphellae in the lobes (like white dots in the picture).
See Timdal's gallery and F. Dobson' s book, Lichens, pag. 261.