Bernard
That would be my first choice.
Mal

Hi Malcolm, great thanks for your message !

Best regards,

Bernard

Hi Bernard & Malcolm
I got yesterday and earlier photos from Dragisa Savic of what he considers S. subhirtella. The spores and warts are similar, but the hairs are strongly ventricose as in Schumacher, and only 150-500 µm long.

I wonder, do you have a photo of the living spores? The abundant oil drops are relatively small in Dragisa's samples.
Zotto

Hi,
I found S.subhirtella twice this year. Both samples were found outside the forest, the first on the ground under the reeds and the other on the shore of the artificial lake. Here are the pictures and compare. Spores are somewhat bigger in the first sample than in the other.

Bernard
Try for a spore print. The length and width of a few more hairs might also help.
Zotto looking at the length suggested by the various papers and keys we can find a good range
Schumacher has max 950  but most 650 x 34 with spores 23.4 x 14.8 max having regularly distributed warts
Benat has the hairs over 500 and spores 24 x 15 and evenly distributed warts
an article in Persoonia (Paal, Kullman and Huijser) has a description of two forms of S subhirtella the first with spores up to 24 x 17.5 and hairs 720 x 34 the second spores 21.8 x 15 with confluent warts and hairs up to 1000 x 33
Depending which details you choose you could rule each of these three finds both in or out of the limits of S subhirtella.
Not an easy group;)
Mal
Ps I still think S subhirtella is the best fit

OK Zotto and Malcolm, thank you for the new pictures and explanations !

I will recheck the hairs and spores dimensions, hoping for a spore print.

Bernard

Thanks Mal
this was my suspicion that it is not an easy species.

Thanks Dragisa for reviewing the second find. It must be added that this is from a rehydrated apo, while the first from fresh. Therefore the spore contents severely changed.

The hairs in the second find are not ventricose?

Zotto

Hi Zotto and Malcolm,

I got a spore print and I measured 20 spores : 
Maximum length : 21
Minimum length : 18,5
Maximum width : 15,5
Minimum width : 11,5
Average : 19.85x12.82

I also rechecked the marginal hairs:
Maximum length : 760
Simple or forked base
I did not find their base specifically ventricose.

Bernard

Good! But you did not observe living spores in water for their contents?

Sorry Zotto,

Here are the pictures…

Bernard

Ah thanks! Splendid, so the drops are relatively small though quite normal for the genus.