Hello,

today I have found a Diaporthales (I think it is a Diaporthales) on Buddleja sp., a Scrophulariaceae. I think it has similarities with Diaporthe inaequalis, but macroscopical features and smaller spores are clear differences. I will describe it:

Fruitbody a single perithecia embedded into cortex, dark brown to black, 0,1-0,2 mm, with a "hidden" ostiolus, perithecia can only be found after cutting the cortex nearly randomly,
Spores 16-24x5-6 µm, very variable in form, with one septation in the middle and slightly constricted, with roundish or pointed endings, with 1-2 bigger and many small vacuoles, smooth, hyaline.
Asci 80-110x5-7 µm, with 8 spores, uniseriate, it seems as if the tops crack by maturation. Paraphyses not seen.

On hanging, but dead twigs of Buddleja sp.

Has anyone an idea? Can Diaporthales be the right direction?

regards and thanks,
Kazuya