Confidence: It's likely to be this, but I can't be certain.
Notes: I am not sure of this and the lichen is very dry. I think it has to be either C. cervicornis (in the strict sense, excluding C. verticillata and C. pulvinata) or else C. subcervicornis. One of the podetia looks like it it is going to proliferate from the centre, a cervicornis character, and the squamules are rather long and strongly incised, also pointing to C. cervicornis in the strict sense. [We have a problem in the UK that our standard lichen floras combine 3 species in 1, as subspecies, when continental lichenologists uniformly and correctly treat them as separate species.]