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Mot de passe perdu? S'inscrire

14-08-2022 18:08

Edvin Johannesen Edvin Johannesen

Found on deciduous wood (probably Betula) in subal

14-08-2022 15:50

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,this Orbilia grew on a strongly rotten branc

13-08-2022 17:18

Stephen Mifsud Stephen Mifsud

I assumed these are weak colonies of Neurospora on

10-08-2022 15:45

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

04-07-2022 18:45

Enrique Rubio Enrique Rubio

I can find no suitable answer for this white Bryos

11-08-2022 00:45

Stefan Jakobsson

On a thin deciduous stick (Salix/Alnus/Betula) on

10-08-2022 18:45

François Bartholomeeusen

Good evening all, On 5 August 2022, a friend gave

11-08-2022 08:16

Josep Torres Josep Torres

Hola.Un muy diminuto Pirenomyceto sobre un tronco

10-08-2022 09:11

Josep Torres Josep Torres

Hola.Un Piremomyceto recogido este pasado domingo

09-08-2022 20:06

Stephen Mifsud Stephen Mifsud

I have found an interesting aspergillus on flowers

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Trichopeziza sp.?
Stefan Blaser, 02-03-2014 10:01
Hello everybody

It would be great to hear your opinion on this:


Substrate: Decorticated, deciduous wood


Fruitbodies: Up to 1 mm in diameter. Disc brown to slightly rose in age. Hairs in tufts, whitish (see photos).


Micro: Asci 60-75 x 7-9 µm, without crosiers, IKI- also after KOH pretreatment. Spores 14-22 x 2.8-3.5 µm, aseptate. Hairs up to 200 x 5 µm, hyaline to yellowish, thick walled, with resinous, brownish excretions. Paraphyses broadly lanceolate, up to 7 µm enlarged, often very fine granules on the apical cell.


Thank you for any help


Stefan

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Enrique Rubio, 02-03-2014 12:20
Enrique Rubio
Re : Trichopeziza sp.?

Hi Stefan


It looks like Trichopeziza 'perrotioides' un undescribed species of the genus Trichopeziza

Stefan Blaser, 02-03-2014 17:30
Re : Trichopeziza sp.?
Hi Enrique

Thanks a lot for your answer. Such a nice species and still undescribed. What a pity...

Best
Stefan
Hans-Otto Baral, 03-03-2014 11:46
Hans-Otto Baral
Re : Trichopeziza sp.?
Hallo Stefan

I hesitated here to answer because I struggled with the spores. Those of T. perrotioides are less tapered at the ends and often slightly allantoid, dn they were never such long: *(8-)10-16(-17.5) x 2.7-3.4(-3.7) ?m. I saw a high number of records or images, and the species shows a certain variability, including colour.

Typical besides inamyloid asci without croziers are the warted deposits on the paraphyses. These are visible on your photos, though rather inconspicuous. I am not sure what else could be tested in your fungus. Yes, it is strange that so far no name could be found for it in the literature, though it is full of unclarified names.

I would like to note  the collection data of this record, if you don't mind. At present, I would not include it in the species but only mention in my prospected paper.

For the host you have no idea? Possibly the wood anatomy could help?

Zotto
Stefan Blaser, 03-03-2014 22:04
Re : Trichopeziza sp.?
Hallo Zotto

Danke für die Antwort. Die Sporenlänge war im grossen und ganzen bis 18 mü, mit Ausnahmemessungen von 19 und 22 mü. Die Sporen stammten aber auch von einem etwas überreifen FK.

Funddaten: 8.2.2014, Kanton Bern, Trubschachen, 822 m.ü.m., Koordinaten: 630825 / 196515

Substrat: Höchstwahrscheinlich Fraxinus

Liebe Grüsse
Stefan
Alain GARDIENNET, 03-03-2014 22:07
Alain GARDIENNET
Re : Trichopeziza sp.?
Hans-Otto Baral, 03-03-2014 23:39
Hans-Otto Baral
Re : Trichopeziza sp.?
Hallo Stefan

Danke!

Fraxinus lässt sich zweifelsfrei erkennen an einem Querschnitt oder -bruch: Auffällig ringporig und Spätholzgefäße in kleine Gruppen oder gar einzeln.

Herbarnummer wäre auch noch gut, schlimmstenfalls muss man den Fund irgendwann mal nachmikroskopieren, falls die Zweifel bleiben...

Zotto
Stefan Blaser, 05-03-2014 07:48
Re : Trichopeziza sp.?
Hallo Zotto

Herbarnummer: SB2014010

Gruss
Stefan