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30-07-2017 09:46

Viktorie Halasu Viktorie Halasu

Hello forum,this small ascomycete grow on wet bare

30-07-2017 16:18

Andgelo Mombert Andgelo Mombert

Bonjour à tous,Sur tige morte de Cirsium (eriopho

30-07-2017 11:05

William Slosse William Slosse

Hallo, I suppose following species is L. virgineum

28-07-2017 12:03

PASCAL DUBOC

Bonjoursuite aux échanges précédents sur des Or

26-07-2017 21:00

Andgelo Mombert Andgelo Mombert

Bonsoir à tous,Sur tige morte de Reynoutria japon

27-07-2017 14:27

Malcolm  Greaves Malcolm Greaves

Can someone suggest a genus/species for this cream

27-07-2017 20:26

Andgelo Mombert Andgelo Mombert

Bonsoir à tous,De bien jolies apothécies poussan

26-07-2017 18:19

PASCAL DUBOC

Bonjourun ami m'a fait parvenir des asco qu'il a f

27-07-2017 13:11

Marja Pennanen

Hello forum,sorry about the poor quality of photos

27-07-2017 15:52

Peter Wilberforce

This interesting ascomycete was found on a rotting

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Discinella aff lividopurpurea
Viktorie Halasu, 30-07-2017 09:46
Viktorie HalasuHello forum,

this small ascomycete grow on wet bare clayey soil in spruce plantation, 690 m a.s.l., on a place damaged by machines (immediately close to another fungi - Byssonectria deformis and Scutellinia pseudotrechispora). I think it's close to Discinella lividopurpurea (= Ombrophila limosella?), but it has inamyloid asci (I tried IKI, KOH+IKI, KOH+MLZ, but not a trace of bluing) and ectal excipulum at the base of apo is amyloid.  

Apothecia up to 1,5 mm, turbinate tu substipitate, younger greyviolet, then purplish.
Sp. dead (8) 8,3-10,4 (10,5) × (3,1) 3,4-4 (4,5) um, very few free spores.
Asci croziers + , IKI-, MLZ-.
Paraphyses filiform, not enlarged, content??
Ectal excipulum of textura porrecta, at the base bluing in IKI - or maybe there's some gel that's blueing?
Medúlla ??

It reminds the Nicolas' collection here: http://ascofrance.fr/search_forum/3011 with those inamyloid asci, but spores are narrower and he didn't report anything amyloid in excipulum.

I appologize for the terrible micro. Unfortunately I had to work with exsiccate and without stereo microscope I failed to cut better samples freehand from such a small asco. 
Thank you for any advices.
Viktorie
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Hans-Otto Baral, 30-07-2017 16:21
Hans-Otto Baral
Re : Discinella aff lividopurpurea
Hi Victorieyour micros are too unsharp to say something definite. Spore size is a bit short but lividopurpurea (limosella) appears to vary in spore length.

Inamyloidity of the ascus apex is strange, but who knows it might happen sometimes. Amyloidity of basal gel layer I do not see on your pics.

Zotto
Viktorie Halasu, 30-07-2017 16:34
Viktorie Halasu
Re : Discinella aff lividopurpurea
Hello Zotto,
here is the base of apothecium, first in Lugol (dilluted a bit), second in KOH+MLZ. It was rather weakly blue, but I thought it could be called amyloid. 
Perhaps it was not fully mature and that's why the smaller spores. I didn't see almost any free spores in the mount. I'll try to find a bigger apothecium, if there's any difference. 
Viktorie
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Hans-Otto Baral, 30-07-2017 17:24
Hans-Otto Baral
Re : Discinella aff lividopurpurea
Yes, it is faintly amyloid.