Accès membres

Mot de passe perdu? S'inscrire

23-06-2025 13:25

Enrique Rubio Enrique Rubio

I would like to hear your opinion on this Scutelli

23-06-2025 04:03

Francois Guay Francois Guay

Hi, I found this tiny sulfur yellow asco growing o

22-06-2025 13:52

DirkW DirkW

Dear friends,anyone out there with this paper?:DOU

26-05-2025 18:09

Henk Remijn

Good day,In a burned forest near Hulst on the bord

21-06-2025 22:27

David Chapados David Chapados

Hi,Is this a Calycina? C. herbarum?Growing on an h

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

11-06-2025 16:26

Jason Karakehian Jason Karakehian

Hi everyone, I am looking for the following protol

18-06-2025 19:24

Bernard Declercq Bernard Declercq

Good evening,On Oenanthe aquatica we collected  a

17-06-2025 14:23

Josep Torres Josep Torres

Hello.A probable Hyaloscypha from last June 1st, s

« < 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.