Rubén

Did you check to see if the outer wall of the spore loosened when in heated LCB?

I am fairly sure it is not S kerguelensis. Your hairs show few septa (K is multiseptate) and they would normally be longer and thicker for that species.
The spores of S kerguelensis are also normally more broadly-ellipsoid rather than ellipsoid as yours.
Mal

Hola Rubén

De acuerdo con Malcolm; usted podría mirar hacia S.torrensis o S.superba mientras que su descripción parece más bien todo lo contrario. De hecho, como se ha dicho Malcolm si se pudiera hacer más fotos en la LCB esto sería para ayudar un poco más.

Michel.

The spore ornamentation of S. superba is very different.
S. torrentis is a good option.

Nicolas
Have you a picture of S superba spores and ornamentation although I have pictures in Schumacher I cannot find any showing the view in LCB.
Mal

Gracias por sus respuestas, Malcolm, Michel, Nicolas.

Tengo todos los ejemplares secos y sólo saqué estas fotos (un poco malas) con azul metileno.

Intentaré rehidratar algún ejemplar para obtener mejores fotos, si es posible.

Saludos

Rubén

Hola Rubén.

Creo que es de hecho S.torrensis, incluso si no se distingue muy bien la ornamentación en sus fotos. La ornamentación es más gruesa S.superba

Michel.

Gracias por su ayuda Michel.

Saludos

Rubén

Apologies for the rather long post that follows but it goes to show the testing times that go in to identifying Scutellina with the current documentation and keys.
Using the information initially given by Rubén I looked at the spores and they were not the shape I would have expected for S kerguelensis and didn't have the type of microverrucose ornamentation. So what could it be? I used each of the keys I have obviously starting with Schumacher.
1 Ellipsoid spores - 8
8 Ascospores not in sheath – 9
9 Ascospores verrucose.... – 10
10 Ascospores with warts with interconnection – 16
16Ascospores with warts that partly coalesce – 21
21 Ascospore wall loosening – 22
Assuming the spore wall does loosen 22 – Ascospore less than 25µ – 24
24 Ascospores 19-24 x 11-15 S superba but as Nicolas pointed out the spores look wrong for this species.
If we now assume no loosening of the spore wall we end up at
27 Hairs shorter than 1000 – 38
38 Ascospores 22 or greater – 41
41 Ascospores ellipsoid – 42 leading to a choice of S cejpii macrospora or nigrohirtula none of which look right.
41 Ascospores broadly ellipsoid – 44
44 hairs 45-50 broad no
44 hairs 130-480 – S kerguelensis

I won't go through the detailed steps but using the key in Nordic Macromycetes if the spore wall loosens the result is S superb if not loosening it leads to S kerguelensis.

A key by S Glejdura for his doctoral thesis gives S kerguelensis or S torrentis (with the suggestion that S superb could possibly be a pseudonym)

Using an unpublished key by Beñat we have the choice of S kerguelensis (possibly var microspora nom prov) or S superba.

Finally using a knowledge based software key I am working on the information we have gives S superba as by far the most likely species.
As suggested by Nicolas and Michel I think S torrensis is the probable id even if the spores are on the big side but it is surprising how many finds fall outside the range of all species described in the literature.
I look forward to seeing if Rubén manages to get a result on the loosening spore wall.
Mal