Dear friends.

This fungus was growing on dead terminal branches of Euonymus japonicus still attached to the bush. The gregarious perithecia are borne on the bark, not on the wood, inside very inconspicuous stromata, usually single or rarely in groups of two, with short necks with barely emerging ostioles. The asci are cylindrical and unitunicate, with a short stipe and a conspicuous subapical euamyloid ring, bluish in Melzer. The paraphyses are abundant and often contain refractive vacuoles. Its eight ellipsoidal ascospores are brownish at maturity, with high lipid content, some of them papillate and perhaps with an apical pore, with an adherent perispore that seems to disintegrate in the equatorial region of the ascospore where they may germinate. The pigmentation of the spore seems to be diluted in the equatorial region, forming a lighter band that is better seen in Melzer as it hides the guttules inside the spore. At this equatorial region of the spore, the walls become so weakened that the spore seem to be disintegrating. In Indian ink, a wide, irregular sheath can be seen surrounding the spore.
I don't have a precise idea about the genus to which this fungus might belong, but perhaps it could have some similarity with Fasciatispora or Amphisphaerella.
The truth is that I am very confused. Any ideas would be welcome.