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14-07-2024 18:23

Joaquin Martin

Hi,I found this Ascomycete on horse dung.The spora

13-07-2024 19:50

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hamatocanth

11-01-2022 16:36

Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

11-07-2024 14:29

Viktorie Halasu Viktorie Halasu

Hello, a thin-fleshed Mollisia on a monocot stem

08-07-2024 23:34

Villalonga Paco

Small Scutellinia growing in garden soil (calcareo

12-07-2024 02:12

Stefan Jakobsson

On a wet lake shore I found a single minute apothe

11-07-2024 10:57

Viktorie Halasu Viktorie Halasu

Hello, I have here a Mollisia on a leaf (possibly

07-07-2024 10:07

Thomas Flammer

I am struggeling with some tiny yellowish apotheci

09-07-2024 19:34

Kozak Robert

HelloDate: 2024.06.18, loess gorges, on soil (?)A

11-07-2024 15:05

Thomas Læssøe

https://svampe.databasen.org/observations/10423287

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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