Scutellinia cfr."nigrohirtula complex "

[patty]

Raccolta di soli 2 esemplari effettuata in giugno 2011 a Monzone(Pavullo-MO) , 850 msl.
Crescita su legno e residui vegetali morti di Castanea sativa , su terreno sabbioso.

"Finalmente una scutellinia a peli corti",mi sono detta ,ma.....non sono arrivata a nessuna determinazione certa, e anche seguendo le chiavi non ho trovato un punto di arrivo .

La maturazione non è completa,nonostante abbia lasciato i 2 esemplari in frigo per un certo numero di giorni. Poche le spore mature fuori dagli aschi e nemmeno molto frequenti quelle all’interno degli aschi, ma gli esemplari si stanno deteriorando e dovrò seccarli.
Questi i caratteri riscontrati:

peli circa 450µm x 20-25 a parete spessa , per lo più a base semplice ma anche biforcata
aschi circa 275 µm
spore sub globose 22-24 x 20 con grosse verruche evidenti

Patty

[patty]

i peli del bordo sembrano come riuniti a mazzetti....quelli laterali sono più radi e distribuiti uniformemente

[patty]

parafisi dilatate all'apice e spesso ramificate

[patty]

[patty]

[Beñat]

Adio Patty ,

This is difficult without ornementation in CB but this form of hairs, size of hairs and size of spores in asci (I precise because this is very important : very big differences in asci and in sporogram, especially in this complex) could give an orientation near my "nigrohirtula complex".
Perhaps, this is not nigrohirtula sensu stricto but I'm waiting the typus, blocked in Czech Republic and I'm not sure about the determination of this species.
Actually and for me, this is a complex with two species, confirmed by phylogeny; But I'm able to separate the two species but who is who ? Who is the real nigrohirtula ? Typus is the only one who can give me the solution. I don't want to give a name without certitude.
So, sorry for this little contribution,

I want to give you my greetings, Patty

Beñat

PS : If you want some Scutellinia collections with short hairs, don't hesitate, I'm submerged now !!

[patty]

Ciao Benat,
Indeed my more convincing idea was for S. nigrohirtula, but the so round form of the spores has created me many doubts.
But, as you have written: "size of spores in asci (I precise because this is very important : very big differences in asci and in sporogram, especially in this complex)"............
I know that it is very difficult to determine only with the images, but your opinion, your suggestions and your hypotheses are however, for me, always very very interesting and instructive.!!
So, mille grazie!

I hope that you can "extricate" soon the problem "nigrohirtula"

if these champions interest you for your studies, tell me.

Patty

ps:modifico il titolo del post