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14-11-2008 01:46

Roland Labbé

Que pensez-vous de ce disco ? Voici les détails

13-11-2008 17:28

Roland Labbé

I would like to make my excuses for the disapearan

13-11-2008 17:21

Roland Labbé

I would like to make my excuses for the desapearan

09-11-2008 22:23

Yannick Mourgues Yannick Mourgues

Bonsoir. J'ai une récolte de Cyathicula cyatho

09-11-2008 12:17

Alain GARDIENNET Alain GARDIENNET

Bonjour, Sur ruscus, j'ai déniché un pyréno qu

07-11-2008 01:13

NC NC

Bonsoir à tous, Dans terrain d'une coupe rase d

05-11-2008 11:11

Alain BRISSARD

Bonjour à tous, J'ai observé un ascomycète fim

02-11-2008 01:23

Uwe Lindemann Uwe Lindemann

Hello, at the end of september 2008 I found in ad

01-11-2008 16:28

Alain GARDIENNET Alain GARDIENNET

Je vous soumets une récolte qui ne me dit rien. T

01-11-2008 01:08

DirkW DirkW

salut asco-friends, i don't speak french - sorr

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Capitotricha ou Lachnum bicolor ?
Roland Labbé, 14-11-2008 01:46
Que pensez-vous de ce disco ?
Voici les détails :
Date de récolte : 2008.11.10
Habitat: terrain vague, tas de branches
Hôte: bois mort, écorce de sorbier
Asques nombreuses, , à 8 spores unisériées, avec appareil apical amyloïde, 40-50 x 6-7 um
Spores cylindro-fusoïdes, à paroi mince, non septées, hyalines, 9-12 x 1,5-2 µm, 10,6 x 1,8 µm en moyenne (10 spores), Q = 5,89
Paraphyses rares, cylindriques-filiformes, non septées, non ou rarement guttulées vers l'apex, ré-fringentes, 35-40 x 0,5-1 µm, de longueur égale ou légèrement plus courte que les asques
Poils de l'excipulum fusoïdes, élargis à la base, lancéolés à l’apex, à paroi légèrement épaisse, multi-septés (6-7 septa), irrégulièrement finement incrustés, 80-140 x 2-4 µm
Excipulum en textura globulosa formé de cellules mesurant jusqu'à 10-11 µm de diam.

La photo suivra bientôt.
Roland
Hans-Otto Baral, 14-11-2008 13:12
Hans-Otto Baral
Re:Capitotricha ou Lachnum bicolor ?
Sounds strange because of the non-.lanecolate paraphyses
Christian Lechat, 14-11-2008 15:31
Christian Lechat
Re:Capitotricha ou Lachnum bicolor ?
Images
  • message #5736
Roland Labbé, 14-11-2008 17:30
Re:Capitotricha ou Lachnum bicolor ?
Wright Zotto. That's what I think.
The paraphyses have only 0,5-1 µm wide, but all others characters agree with L. bicolor.
Is it a species of another genus ?
Thank for your contribution again.
Roland
Stip Helleman, 14-11-2008 17:48
Stip Helleman
Re:Capitotricha ou Lachnum bicolor ?
Cher Roland et Jaqueline'
I think it is better for identification you put a link to the larger image in your sujet, this pictures are still to small to see details.
I searched the web and found it,to my opinion you have a Arachnopeziza here on the Cambium layer of bark (Sorbus is good possible)
http://www.flickr.com/photos/19369983@N06/3026828766/sizes/l/

best wishes Stip
Hans-Otto Baral, 14-11-2008 19:01
Hans-Otto Baral
Re:Capitotricha ou Lachnum bicolor ?
Yes, Stip, seems to be Arachnoscypha aranea.

Zotto
Roland Labbé, 14-11-2008 19:32
Re:Capitotricha ou Lachnum bicolor ?
Mais selon la clé de Fuckel emend. Korf. :
Apothécie urceolée à turbinée. Sur involucres de châtaigne (Castanea) pour A. aranea.
Ce qui ne semble pas être le cas ici, ni la forme ?, ni le substrat sur écorce de sorbier.
Roland

Hans-Otto Baral, 14-11-2008 19:47
Hans-Otto Baral
Re:Capitotricha ou Lachnum bicolor ?
yes, Roland, you are right, it would perhaps be the first time, I also have only finds on cupules and leaves. But I have no other idea. Anybody else?

Zotto
Stip Helleman, 14-11-2008 20:24
Stip Helleman
Re:Capitotricha ou Lachnum bicolor ?
Hello Roland,
The description sais "drying urceolate to turbunate", here apothecia are fresh. But the substrate is strange, perhaps A. eriobasis is a reasonable alternative.

Stip
Stip Helleman, 14-11-2008 20:28
Stip Helleman
Re:Capitotricha ou Lachnum bicolor ?
Roland,
for your information this is Capitotricha bicolor:


Stip
  • message #5749
Roland Labbé, 14-11-2008 20:49
Re:Capitotricha ou Lachnum bicolor ?
Is Capitotricha a good genus ? Does Lachnum englobe Capitotricha ?
Roland
Stip Helleman, 14-11-2008 22:22
Stip Helleman
Re:Capitotricha ou Lachnum bicolor ?
Hello Roland,
Capitotricha is a good genus, and is recognized by a gelatinized excipulum and irragular roughened hairs with crystals, paraphyses contain often conspicious carotene guttules responsible for the orange-yellow color of the hymenium.
Lachnum in its wider sense was used for replacement of the generic name Dasyscyphus and was too heterogenus to remain so quite a numbre of genera are recognized now
Lachnum in its narrow sense contains white-colored species with non gelatinized excipulum and totally granulate hairs with or without crystals. in a number of species the hymeniumcolor is changing in color from yellowish to brick-red on dieing due to thhe presence of refractive vacuolebodies in the paraphyses.
Stip
Hans-Otto Baral, 14-11-2008 23:13
Hans-Otto Baral
Re:Capitotricha ou Lachnum bicolor ?
yes Stip, and Capitotricha is obviously more closely related to the conifericolous genus Lachnellula, so the limits to that genus are sometimes less clear than to Lachnum.

Zotto