Bathelium madreporiforme (Eschw.) Trevis.
El Salvador, depto. Santa Ana, 900 m, leg. H. Sipman, W. Berendsohn & C. Ladino 37369 [B].
Growing on smooth tree bark. The ascocarps are compound, consisting of groups of perithecia.
[picture height = 3.5 mm].
Click for larger picture.