Hi again
These small, blackish, somewhat setose, pyriform perithecia 0.3-0.4 mm high, grew more or less superficially on thiny Clematis vitalba stems, 0.5-0.7 mm in diameter, lying on the ground. The asci appear to have an inconspicuous, refractive, yodonegative apical apparatus and contain eight partially and obliquely fused ascosspores almost always in pairs. One end porate and they often form an eccentric transverse septum.I think it could be a Synaptospora species but I can't find any species of this genus that fits well to the characters of this one.
Many thanks in advance