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10-03-2010 22:07

Gernot Friebes

Hi, next to my pyreno with muriform spores I fo

10-03-2010 05:09

herman lambert

Bonjour, voici ce que je crois être Helvella atr

09-03-2010 23:17

Gernot Friebes

Hi, I were not able to determine this very beau

08-03-2010 18:02

Luc Bailly Luc Bailly

Sur brindille morte de Pinus sylvestris, réc. 27.

07-03-2010 19:02

Beñat Jeannerot Beñat Jeannerot

Bonjour à tous, Toujours dans mon jardin, sur

07-03-2010 16:15

Perz Piotr

Hello :) Did you know such Coelomyceteous paras

07-03-2010 01:10

Yannick Mourgues Yannick Mourgues

Bonsoir. Ci-joint qques photos d'un asco trouvé

06-03-2010 22:37

Perz Piotr

Hi! Today I have seen Neodasyscypha cerina clos

06-03-2010 08:08

Alain GARDIENNET Alain GARDIENNET

Bonjour à tous, Je vous soumets une récolte que

06-03-2010 05:33

Roland Labbé

Bonjour ! Voici un Podophacidium probable. C'e

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Another hairy pyreno
Gernot Friebes, 10-03-2010 22:07
Hi,

next to my pyreno with muriform spores I found this even smaller fungus. The spores are 50-54 x 4,5-5 µm, hyaline, 8- to 12-celled and always bent. The asci are bitunicate, 8-spored, inverted clavate and IKI-. The hairs are dark brown, straight and acute. I didn't arrive at any result...

Best wishes,

Gernot
  • message #10730
Gernot Friebes, 10-03-2010 22:08
Re:Another hairy pyreno
micros (scale=10 µm)

  • message #10731
Alain GARDIENNET, 10-03-2010 22:29
Alain GARDIENNET
Re:Another hairy pyreno
Acanthostigma minutum ?
Jacques Fournier, 10-03-2010 22:33
Jacques Fournier
Re:Another hairy pyreno
Hi Gernot,
this is most likely an Acanthostigma (Tubeufiaceae) because of its small pale-coloured ascomata with a bunch of dark stiff setae around the ostiole, and spore shape. The spore dimensions you give do not fit well the common A. minutum and more resemble those of A. scopulum (56-78 x 2.5-3 µm) in being more narrow and curved. In fact your fungus appears somewhat intermediate between the two species.
Could you check the dimensions again?
Cheers,
Jacques
Alain GARDIENNET, 10-03-2010 23:14
Alain GARDIENNET
Re:Another hairy pyreno
Questions for Jacques,
In fact it's the length of scopulum's spores and the width of minutum's spores ?
I would like to know if, as Margaret Barr noted, scopula is mostly restricted to coniferous trees ? Do you know recolts on deciduous trees ?
But wait for other measures of ascospores.
Alain
Gernot Friebes, 10-03-2010 23:19
Re:Another hairy pyreno
Hi Alain and Jacques,

thank you very much for your answers! A. minutum also grew on that branch but it is really different to me due to it's bigger ascomata and spores. It fits very well to the description of Barr & Réblová and to the fungus which Zotto showed once ( http://www.ascofrance.fr/index.php?r=forum&page=viewtopic&id=7665&highlight=minutum#msg7675 ).

The form of the spores within this collection (the one I showed above) would fit A. scopulum really very well but not the width, as you mentioned, so I will check on this again.

Here I have pictures of A. minutum.

Best wishes,

Gernot
  • message #10737
Gernot Friebes, 10-03-2010 23:20
Re:Another hairy pyreno
micros (scale=10 µm)
  • message #10739
Jacques Fournier, 11-03-2010 12:51
Jacques Fournier
Re:Another hairy pyreno
the spores are obviouly too narrow for minutum and too broad for scopulum.
A. minutum has a small ascomata, so when you say those of your fungus are smaller they are indeed very small?
I suggest you check your fungus against Reblova & Barr's description of A. minutum and list all the differences. Maybe a professional will be interested....
Jacques
Andrew N. Miller, 11-03-2010 16:24
Andrew N. Miller
Re:Another hairy pyreno
Acanthostigma ellisii. Key below from my paper in press at Mycologia. It will appear in the May-June 2010 issue.

Andy

KEY TO SPECIES OF ACANTHOSTIGMA2
1.1 Ascospores less than 5 mm wide . . . . . . . . . . . . . . . 2
1.2 Ascospores $5 mm wide . . . . . . . . . . . . . . . . . . . . . 6
2.1 Ascospores up to 4 mm wide. . . . . . . . . . . . . . . . . . 3
2.2 Ascospores 4–5 mm wide . . . . . . . . . . . . . . . . . . . . 5
3.1 Ascospores 22–27 3 3–3.5 mm, 5(–9)-septate. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. revocatum
3.2 Ascospores more than 30 mm long . . . . . . . . . . . . . 4
4.1 Ascospores (40–)56–78(–95) 3 (2–)2.5–3(–3.5) mm,
10–14-septate. . . . . . . . . . . . . . . . . . . . . A. scopulum
4.2 Ascospores (75–)85–135(–150) 3 2.5–4 mm, 12–16-
septate . . . . . . . . . . . . . . . . . . . . . . . . . . A. filiforme
5.1 Ascospores (29–)38–51 3 4–4.5(–5), (4–)6–8-septate
. . . . . . . . . . . . . . . . . . . . . . . . . . . A. longisporum
5.2 Ascospores (38–)48–64.5 3 4–4.5 mm, 6–12-septate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. ellisii
6.1 Ascospores not or slightly constricted at the septa . 7
6.2 Ascospores constricted at the septa, 40–50 3 5–
6.5 mm, 7–10-septate . . . . . . . . . . A. septoconstrictum
7.1 Ascospores 30.5–35.5(–42) 3 5–6 mm, (5–)6–7(–8)-
septate . . . . . . . . . . . . . . . . . . . . . . . A. perpusillum
7.2 Ascospores longer, $10-septate . . . . . . . . . . . . . . . 8
8.1 Ascospores 40–55(–63) 3 (5–)6–7(–7.5) mm, 10–14-
septate . . . . . . . . . . . . . . . . . . . . . . . . . A. minutum
8.2 Ascospores 60–90 3 5–7.5 mm, 14–18-septate . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . A. multiseptatum
Jacques Fournier, 11-03-2010 16:31
Jacques Fournier
Re:Another hairy pyreno
thanks so much Andy for your expert answer!
Your key is certainly fine but it will be easier to use when it is not encoded!
We'll be patient until the next issues of Mycologia.
Gernot you are lucky for this time, you got a name for your fungus!
Jacques
Andrew N. Miller, 11-03-2010 16:44
Andrew N. Miller
Re:Another hairy pyreno
The decoded version costs extra Euros... ;o)

Sorry about that! I have uploaded the entire article as a PDF. Enjoy...

Andy
Jacques Fournier, 11-03-2010 16:57
Jacques Fournier
Re:Another hairy pyreno
thanks Andy,
species of Acantostigma often show up on Ascofrance, so your fine paper will be very useful to us, for a very reasonable price indeed!
Jacques
Gernot Friebes, 11-03-2010 17:37
Re:Another hairy pyreno
Hi,

thank you very much, Andy! It's great you uploaded your paper, it's really helpful. So I have A. ellisii and A. minutum on one piece of branch, I guess this is a great coincidence.

@Jacues: Yes, the ascomata of A. ellisii were really very small, quite challenging to take a photo of them.

Best wishes,

Gernot
Andrew N. Miller, 11-03-2010 17:57
Andrew N. Miller
Re:Another hairy pyreno
You are most welcome. I would not be surprised if you had more than one species of Acanthostigma growing on the same piece of wood. They tend to fruit at the same time on similar substrates.

Andy
Martin Bemmann, 11-03-2010 20:08
Martin Bemmann
Re:Another hairy pyreno
Thank you for sharing your paper with us!

Best regards,

Martin
Alain GARDIENNET, 11-03-2010 21:14
Alain GARDIENNET
Re:Another hairy pyreno
I just reappointed an old recolt of Acanthostigma. It also was A. ellisii.
Thanks a lot !
Alain
Luc Bailly, 12-03-2010 12:11
Luc Bailly
Re:Another hairy pyreno
Great paper for this interesting genus, thanks for sharing!