I'd like to know your opinion on this fungus which may belongs to the family Diatrypaceae, which forms gregarious stromata as very slightly raised plates on the epidermis of the rachises of Trachycarpus fortunei (Arecaceae). More or less longitudinally arranged and delimited by very irregular black lines, with a melanised surface and an unchanging entostroma containing very sparse perithecia in an eutypoid arrangement, with a diameter ranging from 350 to 500 µm, with short necks opening outwards through slightly prominent and almost always cruciform small ostioles.
Asci with long pedicels, Mlz. and IKI markedly positive.
I do not know whether it could belong to the genus Eutypa, Diatrype or another genus which I am not considering.
Many thanks in advance