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01-06-2020 18:19

Philippe  Larue Philippe Larue

Bonjour à tous, Est-il possible de déterminer,

01-06-2020 16:41

Hardware Tony Hardware Tony

At first I felt this was edging towards S. stellat

01-06-2020 15:51

Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte décortiquée de Salix

01-06-2020 16:39

Andgelo Mombert Andgelo Mombert

Bonjour, Un dernier pour aujourd'hui. Sur tige m

01-06-2020 15:33

Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte de Laburnum anagyroide

29-05-2020 11:28

Maria Plekkenpol

Hello, on cowdung I saw these whitish asco's. Foll

19-04-2015 20:20

Enrique Rubio Enrique Rubio

Hi again Could you help me with this paper? NANN

31-05-2020 19:49

Mirek Gryc

Hi.A colleague from Norway brought one ascocarp of

30-05-2020 13:52

Andrés Valverde Valera Andrés Valverde Valera

Bonjour,Je ne sais pas si ça peut être la phase

31-05-2020 07:26

Yulia Lytvynenko

Dear friends.Looking for a copy of the following w

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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