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24-12-2025 17:08

Propolis sp. on Picea abies
Hulda Caroline Holte

Hello, I have found this propoloid ascomycete on

24-12-2025 18:12

Orbilia
Ethan Crenson

Hello all, A friend found this Orbilia growing on

23-12-2025 11:27

blanc poilu
Louis DENY

bonjour forum,sur débris de bois de feuillu (acer

20-12-2025 10:49

Small resin asco?
Mirek Gryc

Hi. „I doubt it is possible to identify this ti

23-12-2025 08:27

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

21-12-2025 09:32

Spherical Pyrenomycete
Josep Torres Josep Torres

Hello.A tiny ascomycete found embedded in wood in

21-12-2025 21:32

Anamorf on decaying leaves of Euonymus japonicus 'Microphyllus'
Pol Debaenst

Hello, Garden, Burgweg 19, Veurne, BelgiumOn 10/1

22-12-2025 23:38

Phylloscypha labessiana ?
Patrice TANCHAUD

Bonsoir, récolte sur un mur en pierre, apothéci

21-12-2025 12:34

Nectria ??
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

22-12-2025 00:47

Phylloscypha boltonii
Patrice TANCHAUD

Bonsoir, récolte à proximité du milieu dunaire

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Lasionectria on lichen
Stip Helleman, 07-10-2013 00:38
Stip HellemanHallo to all,
last friday I collected a piece of a Parmelia-like lichen on bark that looked infected, under the dissecting microscope I found orange hairy perithecia. My best guess is Lasionectria, but lacking any literature about it I am stucked here.
The mature Perithecia are 120 - 150 mu big, KOH negative spores 1 septate 18,5-21,5 x 3,5 no striation is seen, hairs are with thick glassy walls up to 33 x 9,2
Any help is welcome,
T.I.A.
Stip
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Stip Helleman, 07-10-2013 00:41
Stip Helleman
Re : Lasionectria on lichen
micro
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Christian Lechat, 07-10-2013 05:21
Christian Lechat
Re : Lasionectria on lichen
I do not know what is your specimen, there is no Lasionectria known on Lichen. It would be useful to see a section through ascomatal wall to be sure that is the genus Lasionectria.

Regards,
Christian
Walter Gams, 07-10-2013 08:25
Walter Gams
Re : Lasionectria on lichen
Dear Stip,  Please send some material to Benjamin Stielow at CBS for isolation in culture. Such interesting fungi must be cultured and analysed with molecular methods.  Best wishes   Walter
Alain GARDIENNET, 07-10-2013 08:34
Alain GARDIENNET
Re : Lasionectria on lichen
It's probably the one called Trichonectria rubefaciens.
Alain
Hans-Otto Baral, 07-10-2013 08:44
Hans-Otto Baral
Re : Lasionectria on lichen
Did you compare Trichonectria rubefaciens? I have images of a collection of Piotr: Trichonectria rubefaciens, PP20080720-003, 010.jpg
Zotto
Stip Helleman, 07-10-2013 16:14
Stip Helleman
Re : Lasionectria on lichen
Thanks to all,
Christian, even for me this is too small to make a section freehand.
it seems to be Trichonectria rubefaciens indeed from pictures, although I could not find a description of the species yet.
Walter, could you send me the e-mail adress of Benjamin Stielow so I can can contact him about it, there seems to be no sequence of this species in Genbank.
Best wishes,
Stip
Walter Gams, 07-10-2013 16:51
Walter Gams
Re : Lasionectria on lichen
Het is B.Stielow@cbs.knaw.nl
He will probably forward the material to Pedro Crous or Lorenzo or other interested people.
Stip Helleman, 07-10-2013 20:29
Stip Helleman
Re : Lasionectria on lichen
Bedankt Walter