Diplotomma alboatrum

Crustose epiphytic and saxicolous, on calcareous rocks.
Thallus grey-witish, cracked, without lobes, black apothecia slightly pruinose.
Note: epithecium and hipothecium brownish-grey, spores submuriform, brownish-grey, little greenish and sometimes curved:

Forophyte: Quercus ilex
Altitude: 920 m
Municipality: Enix