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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

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Lasionectria?
Hans-Otto Baral, 29-07-2009 15:48
Hans-Otto BaralHere is a very sparse find of a minute ?Lasionectria. It grew in Tübingen in my garden, on a dead old, 18 mm thick, decorticated branch of Malus hanging in 3,5 m above ground, soc. Orbilia vinosa and Parmelia.

I did not arrive with Amy's keys to a proper genus. I admit I did not test KOH but assume it is a Bionectriacee.

Perith. pale orange-rose, ca. 150 µm diam, dry collapsing. Sp. *10-12 x 3.3-3.5 µm, narrowly ellipsoid, 1-septate, upper cell slightly larger?, 1 medium-sized oildrop in each half near septum, smooth.

thanks
Zotto
  • message #8604
Hans-Otto Baral, 29-07-2009 15:49
Hans-Otto Baral
Re:Lasionectria?
I did not see any oil drops in the peridial cells, nor some differentiation in more than one layer .
  • message #8605
Hans-Otto Baral, 29-07-2009 15:51
Hans-Otto Baral
Re:Lasionectria?
Hairs are often distinctly thick-walled, and somewhat flexuous.
  • message #8606
Hans-Otto Baral, 29-07-2009 15:52
Hans-Otto Baral
Re:Lasionectria?
The spores are badly visible here, and the material showed only a few mature asci and spores.
  • message #8607
Christian Lechat, 29-07-2009 16:17
Christian Lechat
Re:Lasionectria?
Hi, Zotto,
your fungus is it fungicolous? or on a byssoid stroma? could you make a section of acomatal wall? could you give the thickness of it?
Thank you
Hans-Otto Baral, 29-07-2009 18:13
Hans-Otto Baral
Re:Lasionectria?
Hi Christian

the section you see on my second image. The wall is laterally about 25 µm thick. The substrate could partly be an old lichen thallus but this is very difficult to see because it is strongly decayed, see image.

There are 3 perithecia left.

Zotto
  • message #8609
Christian Lechat, 29-07-2009 18:28
Christian Lechat
Re:Lasionectria?
Ok Zotto,
I think it is maybe a Nectriopsis but with so not enough material it is going to be difficult to find a name.
Cheers,
Christian
Hans-Otto Baral, 01-08-2009 11:11
Hans-Otto Baral
Re:Lasionectria?
Have today looked at another ascoma, I kept the branch moist overnight. So now I have seen abundant mature spores. Also the hairs are frequently apically branched, with truncate ends.

Perith. pale orange-rose, ca. 150-200 µm diam (without hairs), dry collapsing. Asci 8-sp., IKI-. Sp. submature *10-12 x 3.3-3.5 µm, mature *11-14 x 3.7-3.9(-4.5) µm, KOH 11-14 x 3.3-3.6 µm, narrowly ellipsoid, 1-septate, 1 medium-sized oil-drop in each half near septum, distinctly densely warted (punctate), in KOH looking almost smooth (warts lower?). Hairs 35-48 x 3.5-4.5 µm, wall 1-1.5 µm thick, IKI-. The peridial wall is laterally about 25 µm thick, KOH-

Zotto
  • message #8633
Hans-Otto Baral, 01-08-2009 11:12
Hans-Otto Baral
Re:Lasionectria?
Have such hairs ever been described in Hypocreales?
  • message #8634