This keys to S. fuliginosa in Galloway's Sticta key, which is clearly wrong, but I don't get anywhere good in the Pseudocyphellaria key either. Using the generic key I get to Lobaria, in there to L. dictyophora, which is sort of suggestive given that it vaguely resembles L. scrobiculata, but Galloway's description of "±reticulate pattern of shining, black tomental hairs on the lower surface, anchored centrally by scattered tufts of black or brown rhizines" seems way off