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24-11-2017 19:56

Chris Yeates Chris Yeates

Bonsoir tousThis was found on corticated attached

24-11-2017 23:44

Lefèvre Lefèvre Lefèvre Lefèvre

Je retrouve ces photos d 'un champi resté sans no

24-11-2017 16:11

Gilbert MOYNE

Bonjour,Voici une petite espèce qui me pose encor

23-11-2017 17:12

Malcolm  Greaves Malcolm Greaves

I took a sample of wood from a rotten stump with S

15-11-2017 23:50

Danny Newman Danny Newman

note cruciate/sulcate ostiolar necks. paraphyses

17-03-2016 09:59

Pascal RIBOLLET

Bonjour Forum, Voici une récolte qui semble appa

23-11-2017 15:27

Zoltan Lukacs Zoltan Lukacs

Hello Everybody,among the scales of pine cone. Do

22-11-2017 22:38

Garcia Susana

He encontrado un grupo de peritecios creciendo inm

23-11-2017 18:26

Andgelo Mombert Andgelo Mombert

Bonsoir à tous,Sur branchette de feuillus, en fé

09-11-2017 19:35

Stephen Martin Mifsud Stephen Martin Mifsud

I found this greyish mould with a silvery tinge co

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Polysporous diatrypaceous asco
Chris Yeates, 24-11-2017 19:56
Chris YeatesBonsoir tous
This was found on corticated attached twigs (around 1cm diameter) of Ulmus glabra.
The perithecia are scattered singly, not sharing a common emergence point. about 0.5mm in diameter.
Asci are free in the venter, saccate and without an obvious apical apparatus; polysporous, difficult to count but probably 64-spored.
Ascospores are allantoid, with sub-polar guttules, 6.8-8.4 x 1.8-2.2µm.
I am confused - any help would be gratefully received.
Cordialement
Chris
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Paul Cannon, 25-11-2017 14:31
Re : Polysporous diatrypaceous asco
I'm away and don't have access to all the literature, but I would start looking in the Calosphaeriaceae. Many are fungal  parasites, or grow in the remains of other perithecial fungi. Good luck!Paul