Accès membres

Mot de passe perdu? S'inscrire

23-01-2021 19:42

Sven Heinz Sven Heinz

Hello, i found this fungi on fallen Betula twigs.

24-01-2021 16:13

Pablo Sandoval Pablo Sandoval

Hola amigos!Encontré esta especie de Lamprospora

24-01-2021 20:21

Hardware Tony Hardware Tony

I found under Picea albies branch on the ground a

22-01-2021 06:21

Laurent LENEL Laurent LENEL

Bonjour à tous, cette pézize semblerait être Pe

24-01-2021 11:13

Castillo Joseba Castillo Joseba

Me mandan el materialseco de Galicia, recolectado

24-01-2021 08:51

Castillo Joseba Castillo Joseba

Me mandan esta especie en seco, recolectada en Cr

22-01-2021 19:09

Mirek Gryc

HiThe collection is from 2016, but I only microsco

23-01-2021 19:04

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a PDF copy of the followin

21-01-2021 15:59

Mirek Gryc

Hi.Found a few years ago but so far I do not know

21-01-2021 03:47

Khomenko Igor Khomenko Igor

Hi, I found this small white discomycete on Alnu

« < 1 2 3 4 5 > »
Geoglossum cookeanum "barlae" ?
Aouali Souhila, 06-01-2021 18:55
Hi,

Happy New Year to everyone. I need advice on this Geoglossum, that matches G. cookeanum "barlae" except for spore size which is smaller.: (56.87-74.34) X (4.18-5.34) microns. I hope that my photos will help for the interpretation of the specimen. Thank you. 

Souhila.
  • message #66876
  • message #66876
  • message #66876
  • message #66876
  • message #66876
  • message #66876
  • message #66876
  • message #66876
Charles Aron, 07-01-2021 19:22
Charles Aron
Re : Geoglossum cookeanum "barlae" ?

Hi Souhila,


I'm not familiar with Geoglossum barlae but the paraphyses look an excellent fit and differ quite considerably from G. cookeanum. Also the ascomata in G. cookeanum are much broader. As far as I can ascertain G. barlae is a rare species, very rare in Britain, and it may be that the spore dimensions are imperfectly known as yet?


Best wishes,


Charles.

Aouali Souhila, 08-01-2021 18:21
Re : Geoglossum cookeanum "barlae" ?
Hello Charles,

Thank you for your feedback. Indeed, Geoglossum barlae is not well known, because of its rarity. My specimens, fit totally the description of Boudier, except spores soze. I compared data from other descriptions too. I'm thinking of doing new measurements next week (spores may have been not totally mature?). 

Best

Souhila
Luc Lenaerts, 09-01-2021 11:54
Luc Lenaerts
Re : Geoglossum cookeanum "barlae" ?
Hello, 
In my opinion it's Geoglossum barlae.
The paraphyses are twisted, distorted and intertwined in different directions, consisting of cells of unequal shape and size, with or without constrictions at the septa; few clearly pearl necklace chains (moniliform chains) present.
According to Benkert (1996) G. barlae is a special form of G. cookeanum.
Luc Lenaerts
Aouali Souhila, 09-01-2021 17:39
Re : Geoglossum cookeanum "barlae" ?
Hello,

Thank you  Luc Lenaerts. Yes, G. barlae is considered as a form of G. cookeanum by Benkert (1996). He explains that the spectacular for of paraphyses in G. barlae are due to unfavorable enironmental conditions. Arauzo & Iglesia (2014) in their phylogenetic study of the family shows that G. barlae is far from G. cookeanum, but still its not clear because they said: "To check whether there are differences at the genetic level, attempts have been made to sequence specimens with this last type of paraphysis but without success, the existence of intermediate transitional forms seems to indicate that they are not. Ecologically it seems to prefer sandy soils, being frequent in dunes or coastal areas, but it can be located in habitats with other types of soil and in the interior. There are numerous citations in Spain and Portugal but there are no data on their presence in Macaronesia.".

I dont know if further investigations have been made on the subject. I'll appreciate any related  literature to dig deeper into the species.

Thank you.
Malcolm Greaves, 12-01-2021 18:22
Malcolm  Greaves
Re : Geoglossum cookeanum "barlae" ?
Has anyone the Benkert paper on G barlae?
Thanks
Mal
François Valade, 13-01-2021 08:02
François Valade
Re : Geoglossum cookeanum "barlae" ?
here it is. the question is still. "Was ist G. barlae?"
Malcolm Greaves, 13-01-2021 12:53
Malcolm  Greaves
Re : Geoglossum cookeanum "barlae" ?
Thanks François.
The opinion on Barlae obviously is a bit mixed. As far as I can see the concept varies between the swollen and contorted paraphyses of Nannfeldt 42, Arauzo, and Benkert 96 and the unswollen but circinate form of Benkert76 and Hustad. I based the naming of my find as G barlae on this second opinion but now it looks as though that might be incorrect.
This photo shows the various paraphyses of specimens called G barlae (the last one my own).
Am I missing something?
Thanks
Mal
  • message #67047
Luc Lenaerts, 14-01-2021 12:00
Luc Lenaerts
Re : Geoglossum cookeanum "barlae" ?
Hello,
Abb. 9 by Benkert (1976) of G. barlae on the left side is wrong. He changed his opinion of G. barlae in 1996.
In my opinion Abb. 9 and the other one bottom left  and bottom right is Geoglossum umbratile.
Luc Lenaerts
Malcolm Greaves, 14-01-2021 16:43
Malcolm  Greaves
Re : Geoglossum cookeanum "barlae" ?
Thanks for the information Luc. I will change my id and amend my key to fit in with this different description of G barlae.
Mal