Lugol

Hard to tell. A Ciliolarina perhaps? Does it have rough small hairs?

Dear Zotto,
The elements of this ascoma are so strongly hyaline that observation is extremely difficult. As you can see, the size is also a challenge. I tried staining, but I currently don't have any Congo Red. I couldn't see anything resembling hairs. There are several dozen fruitbodies on this resin; I have preserved them and will try again once I obtain some staining reagent. One thing I am certain of: this species is strictly resinicolous. I haven't seen a single fruitbody outside of the resin.
I have already searched your drive for the genus you suggested, but I couldn't find anything similar. The fruitbodies are mature, so these dimensions are definitely representative of the species. The spores immediately reminded me of Hyphodiscus hymeniophilus, but then again, nothing else fits that species. As soon as I saw them, I knew they would be problematic because I've never seen anything like them before.
Could it be some resinicolous Cistella?
Best regards,
Mirek

„Hi Zotto,
I've looked through your drive again and found a very similar Ciliolarina collection: "Abies resin, synnemata". The morphology is very similar, but the spores appear slightly larger – at least according to my measurements based on the scale bar in the photos.
It seems to me that such fungi are not that rare on old resin. I've found similar specimens again, also on spruce resin, but at a site about 20 km away from the previous one. Initially, I thought it was the same species but more mature, however, the spore measurements contradict this. The current dimensions are approximately 8 × 3 µm. I observed a single septum in fully mature spores.
The hairs are slightly roughened, although this isn't clearly visible in the photos. The iodine reaction is positive, but not 'bb' (I didn't test it after KOH pretreatment). I find it difficult to judge whether these are typical croziers.
Best regards,
Mirek"

I am now convinced that it is a Hyphodiscus, a very difficult genus. The warted hairs are clearly visible on your photo, and also the croziers are clear. You saw in my folder that there are several subfolders without an official name.

Hi Zotto,
I usually avoid this type of collection, as research in this area rarely ends in success. However, sometimes you have to accept a partial failure and be happy with a "half-success," as is the case here. At least now we know which genus we are dealing with. I am, of course, referring to the second collection; as I mentioned, I couldn't manage the first one at all, even though their structure seems similar.
Best regards, and I wish you a peaceful holiday season and a Happy New Year!
Mirek

Ah. I have overlooked that you posted two collections.