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02-12-2025 18:59

Malcolm  Greaves Malcolm Greaves

This pair of ascos 2.5cm across were on recently b

02-12-2025 19:25

Buckwheat Pete

Hello, can anyone identify this hairy fungus growi

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Mirek Gryc

527 / 5 000Hello everyoneThey grew on dead shoots

30-11-2025 12:53

Edvin Johannesen Edvin Johannesen

White short-stipitate apothecia found on thin twig

30-11-2025 10:47

William Slosse William Slosse

I recently found a collection of small Peziza sp.

27-11-2025 12:01

Thomas Læssøe

https://svampe.databasen.org/observations/10496727

27-11-2025 11:46

Thomas Læssøe

https://svampe.databasen.org/observations/10493918

17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

29-11-2025 08:40

Andreas Millinger Andreas Millinger

Hello,on a splintered part of a branch on the grou

28-11-2025 16:45

Nogueira Héctor

November 23, 2025 Requejo de Sanabria (León) SPAI

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Lichenicolous fungus on Pertusaria pertusa - 2015-10-03
Lepista Zacarias, 06-10-2015 20:04
Hi everyone,
I found this lichenicolous fungus growing on the thallus of Pertusaria pertusa. It is a pyrenomycete having simple spores with many guttules inside, of dimensions:
(19.9) 21.3 - 25.8 (27) x (9.5) 10.6 - 12.6 (13.8) µm
Q = (1.7) 1.8 - 2.3 (2.5) ; N = 30
Me = 24.2 x 11.6 µm ; Qe = 2.1 .
The list of lichenicolous fungus on Pertusaria is very long, as can be seen for instance in Lichenicolous net. I have tried without success to find there anything similar.
Anyone have any suggestion of what this could be?
Thanks in advance,
zaca
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Javier Etayo, 07-10-2015 23:13
Re : Lichenicolous fungus on Pertusaria pertusa - 2015-10-03
Dear Zaca, 
I would not say this fungus is a lichenicolous one! The lichen is Pertusaria pertusa as you say but the fungus seems to be an stromatic lignicolous growing under the lichen. I do not know it.
Best wishes. Javier
Lepista Zacarias, 07-10-2015 23:18
Re : Lichenicolous fungus on Pertusaria pertusa - 2015-10-03
Thanks, Javier.
I think that you must be right, but my first impression was that it was lichenicolous.
Maybe someone else has an idea of what it could be.
Regards,
zaca
Alain GARDIENNET, 08-10-2015 06:31
Alain GARDIENNET
Re : Lichenicolous fungus on Pertusaria pertusa - 2015-10-03

Javier is right, I think that it could be a Botryosphaeria species, a lignicolous fungus.


Alain

Lepista Zacarias, 08-10-2015 16:31
Re : Lichenicolous fungus on Pertusaria pertusa - 2015-10-03
Thanks, Alain, for helping me once more.
After your comment I search for information and found the site
http://www.crem.fct.unl.pt/botryosphaeria_site/index.htm
where I could see some species similar to my specimen. Unfortunately, the key present there is based on the properties of conidia, which I didn't observe.
Best regards,
zaca