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Bonjour à tous,Je voudrais votre avis sur cette r
Hymenoscyphus ?
Garcia Susana,
12-06-2013 10:31
This small ascomycete was found over dry leaves of Quercus.
Small in size, about 0.2 mm in diameter. Not seen croziers.
I think it could be Hymenoscyphus but I have many doubts.
Any contribution?
Thanks, greetings
Susana
(Navarra-Spain)
Nicolas VAN VOOREN,
12-06-2013 11:16
Re : Hymenoscyphus ?
It reminds me the genus Mollisina. I only know M. rubi which grows on fallen leaves of Rubus. My collection seems close to yours. The second photograph shows "hairs" on leaf, so I don't think it is Quercus... Please check that.
Did you also test the amyloid reaction of ascus ring after a mount in KOH? It should be blue.
Nicolas
Did you also test the amyloid reaction of ascus ring after a mount in KOH? It should be blue.
Nicolas
Yannick Mourgues,
12-06-2013 12:31
Re : Hymenoscyphus ?
On dirait qu'il y a une réaction rouge de l'asque sur la photo 3, non ?
Yannick
Yannick
Nicolas VAN VOOREN,
12-06-2013 12:55
Re : Hymenoscyphus ?
Oui, c'est pour cela que je préconise le test avec KOH pour contrôler qu'il s'agit d'une réaction hémiamyloïde (ce que j'avais noté sur ma récolte de M. rubi).
Yannick Mourgues,
12-06-2013 13:00
Re : Hymenoscyphus ?
Tu as raison.Attendons sa réponse.
Garcia Susana,
12-06-2013 16:07
Re : Hymenoscyphus ?
Hello again:
I've been tested KOH + IKI proposal, and indeed, the species is hemiamyloide.
With respect to the substrate, I have no doubt, is Quercus.
I've been tested KOH + IKI proposal, and indeed, the species is hemiamyloide.
With respect to the substrate, I have no doubt, is Quercus.
I can identify it as Mollisina rubi regardless of the substrate?
thank you very much.
Susana
Stip Helleman,
12-06-2013 23:29
Re : Hymenoscyphus ?
Hi Susanna,
Your spores seems to be too big for M. rubi, I think M. acerina fits better although your asci seems a bit tall but of coarse it is a comparisation with dead material. (in my collection the ascus reaction was rb in IKI). Raitviir 2004 gives also Quercus as substrate.
cheers,
Stip
Your spores seems to be too big for M. rubi, I think M. acerina fits better although your asci seems a bit tall but of coarse it is a comparisation with dead material. (in my collection the ascus reaction was rb in IKI). Raitviir 2004 gives also Quercus as substrate.
cheers,
Stip
Garcia Susana,
13-06-2013 08:58
Re : Hymenoscyphus ?
Hello
I have valued the two possibilities M.acerina and M. rubi
Looking at the information available note that the size of the spores and asci overlap and I think they are not defining characters. What seems clear is that the spores to M.acerina no gutulas (= 0), while a small gutulas at both ends (= 1) are present in M.rubi.
Based on this I favor M.rubi although the substrate (deciduous trees) was more in accordance with M.acerina.
I searched the literature you mention, but not available (RAITVIIR, A. 2004. Revised synopsis of the Hyaloscyphaceae. Scripta Mycologica 20: 1-133) could send it to me?
I have valued the two possibilities M.acerina and M. rubi
Looking at the information available note that the size of the spores and asci overlap and I think they are not defining characters. What seems clear is that the spores to M.acerina no gutulas (= 0), while a small gutulas at both ends (= 1) are present in M.rubi.
Based on this I favor M.rubi although the substrate (deciduous trees) was more in accordance with M.acerina.
I searched the literature you mention, but not available (RAITVIIR, A. 2004. Revised synopsis of the Hyaloscyphaceae. Scripta Mycologica 20: 1-133) could send it to me?
Thanks again
Susana?
Stip Helleman,
13-06-2013 11:04
Re : Hymenoscyphus ?
Hi Susanna,
it would not surprise me as it turns out to be one variable species, as for now I don't see any other deciding difference as the substrate in my collections, but Raitviir gives smaller spores for rubi. M. acantophila as a seperate species is also in his synonymy-list of rubi.
A downloadlink is in your mailbox
Stip
it would not surprise me as it turns out to be one variable species, as for now I don't see any other deciding difference as the substrate in my collections, but Raitviir gives smaller spores for rubi. M. acantophila as a seperate species is also in his synonymy-list of rubi.
A downloadlink is in your mailbox
Stip
Garcia Susana,
13-06-2013 11:42
Re : Hymenoscyphus ?
I read the article you sent me and I think it increases the confusion.
I can archive it as Mollisina cf. ruby
In any case, I have learned a lot of the genre.
Greetings
Susana
I can archive it as Mollisina cf. ruby
In any case, I have learned a lot of the genre.
Greetings
Susana