While I do not expect a perfect match with the scant information I give, I am curious about what it could be

The perithecia is covered with short stout yellowish hairs that make it look like a primordium of a basidiomycete at first glance, however the fungus produce very long chain of spores (up to several mm long like some coelomycetes) and have 8 spored very thin walled (evanescent?) asci. The spores are lemoniform and have to germ hole, on on each side of it. They mesure less than 10 micron long and are guttulated.

I am quite confused by this fungus, it is certainly a sordariomycetes but I never saw a telemorphic ascomycete doing those spores masses before. 

Growing on rotten wood in damp chamber.

 https://farm1.staticflickr.com/313/19893509612_16d81864ef_b.jpg

If someone have an idea, please let me know

Regards

Jonathan M