Hi there,

here is an Amphisphaeriaceae which I am not able to identify, I have tried different genera of the family but there was no matching species, not in Amphisphaeria, not in Lepteutypa. I do not have an idea of L. hederae since this species is not mentioned in any key I have tried.

Perithecia are embedded into the substrate, 0,2-0,5 mm, blackish, with a very short Ostiolus cracking the bark. There are inconspicuous stromatic structures surrounding the perithecia, clustering them up to 4-6.

Sp. 22-27x6,5-7,5µm, with 3 septations, which seem to have a reddish colour, hyaline at first, then very pale brown, in IKI greenish. Asci up to 160x9µm, 8 spores in uniseriate formation, IKI +.

Substrate is an attached Tilia cordata branch. Together with Hercospora tiliae and Splanchospora ampullacea.

Any idea?

regards,
björn