Phylum: Ascomycota Family: Helotiaceae
Claussenomyces sp. Kirschst.
This single apothecium was found on a piece of rotten wood. It's too immature to give a definitive species name but it's possibly C. atrovirens. I've included it here as useful reference.
Identified by Luis Quijada
Medardi - Overview of the genus Claussenomyces and a description of Italian collections, 2007