Sticta fuliginosa

Foliose epiphytic, on mossy bark.
Note: thallus dark brown to olive-gray, upper surface covered with tiny cylindrical to coralloid isidia:

Lower surface pale brown, covered with an almost white tomentum:

Medulla white:

Phorophyte: Quercus ilex
Altitude: 1.200 m
Municipality: Tabernas
Comment: it is a hygrophilous species and oceanic distribution so we are very surprised to find it in this place.