Accès membres

Mot de passe perdu? S'inscrire

01-03-2024 18:06

Marc Detollenaere Marc Detollenaere

Dear Forum,On unidentified moss I found some small

01-03-2024 23:06

éric ROMERO éric ROMERO

Bonjour, Sur laissée de mustélidé indeterminé

02-03-2024 12:37

Bernard Declercq Bernard Declercq

Hello,I am looking for a pdf of following paper:Ud

29-02-2024 10:42

Charles Grapinet Charles Grapinet

Hello, Yesterday I found a Periconia on a dead Ae

22-10-2019 00:02

Yannick Mourgues Yannick Mourgues

On Fagus decorticated wood near a stream. Diametr

29-02-2024 16:43

Malcolm  Greaves Malcolm Greaves

Can someone suggest what this might be. It is deve

25-02-2024 19:50

Robin Isaksson Robin Isaksson

Found this one 3-4 times on resin in SwedenAsci IK

24-02-2024 15:15

Louis DENY

Bonjout ForumTrouvé à Belfort (400m altitude), s

27-02-2024 12:55

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia España reco

« < 1 2 3 4 5 > »
Dothideomycete on Clematis
Hans-Otto Baral, 14-07-2008 10:57
Hans-Otto BaralBon jour

from La Dame de Chambrille, thick Clematis branch 1.8 m above ground, decorticated, very rotten, soc. Hyalorbilia guttulata (leg. Stip Helleman).

Bitunicate ascomycete with smooth perithecia and muriform hyaline spores *48-50 x 12.5-13.5 µm.

has anybody any idea?

Zotto
  • message #5127
Hans-Otto Baral, 14-07-2008 10:58
Hans-Otto Baral
Re:Dothideomycete on Clematis
microscopy
  • message #5128
Christian Lechat, 14-07-2008 12:32
Christian Lechat
Re:Dothideomycete on Clematis
Hi Zotto,
did you look for in the Pleomassaria genus?
Hans-Otto Baral, 17-07-2008 10:54
Hans-Otto Baral
Re:Dothideomycete on Clematis
Hi Christian

For Pleomassaria I find only two species (in Munk), with brown spores. Can you tell me any literature? Maybe my species gets brown spores when overmature?

Zotto
Christian Lechat, 17-07-2008 11:45
Christian Lechat
Re:Dothideomycete on Clematis
Hi, Zotto,
I send a key of Pleomassaria species to you.
Hans-Otto Baral, 19-07-2008 21:25
Hans-Otto Baral
Re:Dothideomycete on Clematis
Hi Christian

I have problems with that genus. The spores of Pleomassaria are brown at maturity, very thick-walled with "ocellate" cell lumina, and a sheath around. Also the perithecia are subperidermal and host- specific. Here my old drawing from DVD (Pleomassaria carpini, HB 1601.jpg). With your key I don't arrive at a good result.
  • message #5178
Hans-Otto Baral, 19-07-2008 21:31
Hans-Otto Baral
Re:Dothideomycete on Clematis
Here images of the asci of the Clematis find, this time in dead state (KOH, KOH + IKI). Asci are 4-8-spored, Dead spores measure 43-55 x 11-13 µm. Perith. 0.3-0.4 mm diam., somewhat conical. The lipid in the spore cells is fused to one globose LB while the cell wall is difficult to see but clearly thin-walled.

Zotto
  • message #5179
Hans-Otto Baral, 19-07-2008 21:34
Hans-Otto Baral
Re:Dothideomycete on Clematis
Perithecium in section (difficult because carbonaceous)
  • message #5180
Christian Lechat, 20-07-2008 10:42
Christian Lechat
Re:Dothideomycete on Clematis
Ho yes, hyalin ascospores , so, you should look in Macrospora and Pyrenophora genera
Hans-Otto Baral, 26-07-2008 13:06
Hans-Otto Baral
Re:Dothideomycete on Clematis
I sent my images to Walter Jaklitsch, and he suggested that the collection fits best to Teichosporella cervariensis Sacc. et Berl. (figured in Berlese). But I did not yet see this description. He also mentioned that Macrospora, Pyrenophora, Leptosphaerulina, Wettsteinina, Pseudoplea, etc.
grow on grasses and leaves, have minute ascomata with only few asci,
and spores with mostly few septa and getting brown at least with age

Zotto
Christian Lechat, 26-07-2008 15:46
Christian Lechat
Re:Dothideomycete on Clematis
the ascomata of Teichosporella are "apothecioid" according to M.E. Barr, it's why I asked a section to you. Berlese watch of perithecioid ascomata, there is a problem!!
There are numerous features in you collection which fits to this genus, specialy the ascospores but I don't know if it is Teichosporella genus.
Christian
  • message #5202
Hans-Otto Baral, 26-07-2008 17:19
Hans-Otto Baral
Re:Dothideomycete on Clematis
Oh thanks, I received only the text, here it is.

Walter suggested the genus Julella as a first place for this cervariensis, a genus which comprises also lichenized taxa.

Zotto
  • message #5204
Christian Lechat, 26-07-2008 18:18
Christian Lechat
Re:Dothideomycete on Clematis
did you see a gel coating around the ascospore? because it is a feature of Julella genus
Hans-Otto Baral, 26-07-2008 22:42
Hans-Otto Baral
Re:Dothideomycete on Clematis
As visible on the water mounts made in Melle, there is no perceptible gel sheath.

Zotto