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25-04-2025 22:48

Gustaf Fredell Gustaf Fredell

Hello,I hope everything is going well. I couple mo

18-04-2025 23:16

Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

24-04-2025 21:35

Thorben Hülsewig

Hi there,last week i could found this asco on an S

25-04-2025 17:24

Stefan Blaser

Hi everybody, This collection was collected by J

25-04-2025 09:33

Josep Torres Josep Torres

Ascomata shaped like deformed black grains, measur

24-04-2025 21:53

Lothar Krieglsteiner Lothar Krieglsteiner

... 15.7.24 in the Alps. There were many asci with

23-04-2025 20:16

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon Looking for Octospores / Lamprospo

24-04-2025 15:03

Henri Koskinen

Hello, I collected this Lasiobolus 22.04. near Hel

23-04-2025 19:58

Francois Guay Francois Guay

I found this interesting Orbilia sp. one year ago

22-04-2025 10:37

François Bartholomeeusen

Also found on April 18, 2025 on an old seed-pod of

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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