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Bitunicate pyreno on Quercus ilex
Enrique Rubio, 24-03-2013 20:30
Enrique RubioHi to all

This fungus
make superficial and ostiolate pseudothecia, singly or in small groups up to
20-25 pyriform pseudothecia 0.3-0.4 mm high but really they are not stromatic.
The host is a hanging decorticated branch of Quercus ilex in a sunny exposed submediterranean
situation growing close to Corticium medioroseum, a typical southern fungus.


The pseudothecial walls, covered by a yellowish KOH negative covering, are redish and the gelatinous content orange.
I don't know what genus belongs this rare fungus(Dictyotrichiella, Capronia?...)


Many thanks again for your help

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Jacques Fournier, 24-03-2013 20:50
Jacques Fournier
Re : Bitunicate pyreno on Quercus ilex
Hola Enrique,
very nice and colourful fungus! I wonder if asci are really bitunicate, they seem fairly thin-walled on your photo. This should be checked on immature asci. A possible lead is Thyridium, a genus of unitunicate pyrenomycetes with muriform ascospores and coloured hyphae around perithecia. I know T. vestitum but it lacks the orange interior. You can find it in Barr 1983, Mycotaxon 43: 149-157.
Un saludo,
Jacques
Gernot Friebes, 24-03-2013 21:13
Re : Bitunicate pyreno on Quercus ilex
Hi,

maybe something related to Thyronectroidea chrysogramma (Ellis & Everh.) Seaver? See the description in Seaver (1909): 
http://www.cybertruffle.org.uk/cyberliber/59350/0001/005/0206.htm

There's possibly a more recent description in Rossman, Mem. N. Y. bot. Gdn 49: 259 (1989) but unfortunately I don't have this paper.

Best wishes,
Gernot

PS: It's certainly not a Capronia (=Dictyotrichiella).
Jacques Fournier, 24-03-2013 22:02
Jacques Fournier
Re : Bitunicate pyreno on Quercus ilex
good guess Gernot!
Thyronectria chrysogramma has been thoroughly re-described by Rossman & Samuels (1999, Genera of Bionectriaceae etc) with spores 32-35 x 7-11 µm that are too big for Enrique' fungus. The orange interior is not recorded.
Likely something different but not that far.
Jacques
Alain GARDIENNET, 24-03-2013 22:37
Alain GARDIENNET
Re : Bitunicate pyreno on Quercus ilex
Bonsoir les amis,
Quelle coïncidence, je peinais justement à déterminer un asco à spores muriformes trouvé sur Morus. Cela doit être T. vestitum.
La doc que tu cites Jacques est dans Mycotaxon 18 et non 43. Les numéros de pages sont les bons.
Je vais de ce pas contrôler ma récolte.
Alain
Alain GARDIENNET, 24-03-2013 22:53
Alain GARDIENNET
Re : Bitunicate pyreno on Quercus ilex
Quelques photos.
Pas de couleur orangée pour le mien.
Jacques, toi qui connais bien vestitum, tu le reconnais ici ?  
Les spores ont été mesurées à 19-23 x 9,5-11 µm.
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Jaklitsch Walter, 25-03-2013 12:43
Re : Bitunicate pyreno on Quercus ilex
We have similar things in culture and also sequenced. I would be happy about some material for comparison.
Thanks, Walter
Jacques Fournier, 25-03-2013 17:22
Jacques Fournier
Re : Bitunicate pyreno on Quercus ilex
Alain,
l'aspect macro est très variable et je n'ai vu que deux récoltes. Il y a peut être plusieurs espèces différentes sous le nom de vestitum et je compte sur Walter pour clarifier la situation.
Enrique je pense que ta récolte intéresserait aussi Walter.
Amitiés,
Jacques
Enrique Rubio, 25-03-2013 17:59
Enrique Rubio
Re : Bitunicate pyreno on Quercus ilex
Bosoir mes amis Jacques, Gernot, Alain et Walter


I think this fungus is not T. vestitum, a fungus (perhaps more fungi...) with more inmersed and blackish perithecia with long, cylindrical asci. The asci of this fungus are clavate and shorter.
Really the gelatinous content of the pseudothecia is not orange, it's only the reflection (transparency) of their orange walls. 
I will send my material to Walter

Many thanks to all for your opinion
Enrique
Yannick Mourgues, 29-06-2016 20:48
Yannick Mourgues
Re : Bitunicate pyreno on Quercus ilex
Bonsoir Enrique.
Est-ce que Walter t'a dit quelque chose sur ta récolte ? J'ai quelque chose de très semblable.
Merci.
Yannick
Enrique Rubio, 29-06-2016 20:56
Enrique Rubio
Re : Bitunicate pyreno on Quercus ilex

Hi Yannick


Definitely it was a new described species, Thyronectria asturiensis Jaklitsch & Voglmayr 2014, that we have found also on Rhamnus alaternus as well on Quercus ilex

Alain GARDIENNET, 29-06-2016 20:59
Alain GARDIENNET
Re : Bitunicate pyreno on Quercus ilex

Salut Yannick,


Depuis il ya eu du neuf. Voir Persoonia 33 (2014) ; Thyronectria asturiensis


Alain

Alain GARDIENNET, 29-06-2016 21:00
Alain GARDIENNET
Re : Bitunicate pyreno on Quercus ilex
Enrique a dégainé plus vite !
Yannick Mourgues, 29-06-2016 21:13
Yannick Mourgues
Re : Bitunicate pyreno on Quercus ilex
Merci à tous deux !
Je vais relire la publi.