Accès membres

Mot de passe perdu? S'inscrire

02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

« < 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.