Accès membres

Mot de passe perdu? S'inscrire

15-07-2025 13:27

Angel Pintos Angel Pintos

Hello, does anyone have access to the following ar

14-07-2025 11:20

Michel Hairaud Michel Hairaud

Bonjour, Voici une espèce de  (?) Hyaloscyphace

16-01-2023 21:31

Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

14-07-2025 17:55

Yanick BOULANGER

BonjourAutre dossier laissé en suspendJe viens de

14-07-2025 11:17

Yanick BOULANGER

BonjourJ'ai un dossier Jackrogersella qui est rest

14-07-2025 15:52

Gernot Friebes

Hi,I wanted to share this collection on Rubus idae

14-07-2025 13:37

Gernot Friebes

Hi,do you think this collection could be R. ulmari

25-02-2023 18:36

Elisabeth Stöckli

Bonsoir, Trouvé sur un tronc de Salix recouvert

12-07-2025 16:45

Thierry Blondelle Thierry Blondelle

Bonjour à tous,J'avais d'abord pensé à des stro

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

« < 1 2 3 4 5 > »
Hairy black on Acer
Margot en Geert Vullings, 02-12-2024 19:02
On a fallen branch, probably Acer, we found these black hairy balls, size 0.2 mm.
The hairs are lighter in color towards the top and the top is rounded.
The hairs are multiseptate and double-walled.

The spores have one sept and cilia at both ends. 

Measured in water: Me = 15.6 × 2.9 µm ; Qe = 5.3

Does anyone have an idea what this could be?
Many thanks in advance,
Margot&Geert
  • message #80811
  • message #80811
  • message #80811
  • message #80811
  • message #80811
  • message #80811
  • message #80811
Martin Bemmann, 02-12-2024 19:40
Martin Bemmann
Re : Hairy black on Acer
Probably a Dinemasporium?

Regards

Martin
Margot en Geert Vullings, 02-12-2024 21:30
Re : Hairy black on Acer
Thanks Martin, that seems to fit well.
Is it possible to come to a specie? We have no idea which species occur in the Netherlands.
Martin Bemmann, 03-12-2024 10:45
Martin Bemmann
Re : Hairy black on Acer
Hi,

a common species, known also from Acer, is D. decipiens. But your measurements of the conidia a far too large. Did you measure with or without the setulae?

Martin
Margot en Geert Vullings, 03-12-2024 17:08
Re : Hairy black on Acer
We measured the conidia without the setulae.
The setulae were measured:
(3.8) 3.9 - 5.6 (6.6) µm
N = 20

Me = 4.8 µm

Margot&Geert
Martin Bemmann, 04-12-2024 10:10
Martin Bemmann
Re : Hairy black on Acer
My last guess would be Pseudolachnea hispidula. The size of the conidia would fit, though more slender in Ps.h.. They are one-septate, but the setulae are shorter, 2-3µm (Sutton 1980), 1-1.2 µm (Nag Raj 1993).
Margot en Geert Vullings, 04-12-2024 10:53
Re : Hairy black on Acer
We also looked at Pseudolachnea hispidula, but it has hairs that are not septated and we found multi-septate hairs. We also did not see the white center.
Thomas Flammer, 04-12-2024 13:19
Margot en Geert Vullings, 05-12-2024 12:04
Re : Hairy black on Acer
Thomas, can Phomatospora dinemasporium also occur on wood? 

Described in Ellis&Ellis this is on grasses and other plants.

Kind regards, Margot&Geert
Martin Bemmann, 05-12-2024 16:44
Martin Bemmann
Re : Hairy black on Acer
Hmmm,

sporodochia look quite different, conidia are more slender and non-septate and setulae this time longer...
Margot en Geert Vullings, 05-12-2024 17:30
Re : Hairy black on Acer
Thanks Martin then we will keep this one at P. hispidula.

Kind regards, Margot&Geert


Martin Bemmann, 05-12-2024 18:25
Martin Bemmann
Re : Hairy black on Acer
make it cf....
Margot en Geert Vullings, 06-12-2024 13:35
Re : Hairy black on Acer
Martin, we do not know the meaning of cf, is it uncertain or it does resemble?

Kind regards, Margot&Geert
Martin Bemmann, 06-12-2024 14:15
Martin Bemmann
Re : Hairy black on Acer
cf. is originally the abbrevation for Latin confer = compare!.

In biology it means collectio formarum = a group of similar forms, as a comment to the uncertain ascription to a specific species.

Both interpretations do more or less the same job...

Regards

Martin
Margot en Geert Vullings, 06-12-2024 19:09
Re : Hairy black on Acer
Thank you Thomas.