Verrucaria calciseda

Crustose endolithic, saxicolous, usually lapidicolous, on calcareous rocks.

Note: radiating cracks running from the perithecial pits:

Spores simples, colourless, ellipsoidal, 18-26 x 8-13 micras.

Lithology: limestone

Altitude: 70 m

Municipality: Almería