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05-09-2025 18:53

Robin Isaksson Robin Isaksson

Hi! Spores 1 septate; 12-13 x 3um Hairs 35-75

05-09-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour, hi everyone,Do you know where the fungari

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

04-09-2025 20:11

Åge Oterhals

Saccobolus on dear droppings. Can any of you confi

03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

02-09-2025 10:28

Castillo Joseba Castillo Joseba

De ayer en madera muy podrida de haya (Fagus)A ver

31-08-2025 19:41

Enrique Rubio Enrique Rubio

Hi to someone.I need to download this issue of Sve

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

31-08-2025 17:32

Michel Hairaud Michel Hairaud

Bonjour, Pas d'identité trouvée pour cette réc

01-09-2025 08:42

François Corhay

Un ami, conservateur d'une RN en Belgique, m'a adr

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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