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23-02-2020 15:28

Uwe Lindemann Uwe Lindemann

Hi forum,I am searching for the following paper:Be

23-02-2020 18:10

Riet van Oosten Riet van Oosten

Hello, Found by Rayan Majoor, Jan. 2020, The Neth

16-03-2018 09:37

Gilbert MOYNE

Habitat : sur rameau mort aérien de gui (Viscum a

23-02-2020 10:03

Peter Püwert Peter Püwert

Lit. request for this species: Pleomassaria ulmi

20-01-2020 18:55

Andgelo Mombert

Bonsoir, Un petit discomycète vert noirâtre mes

21-02-2020 20:33

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un Ascobolus que

22-02-2020 08:22

Vasileios Kaounas Vasileios Kaounas

First time i see so little Geoglossum, 1 cm. Beca

23-02-2020 11:15

William Slosse William Slosse

Hello Forum, on 14/02/20 I again collected a coll

22-02-2020 16:41

Robin Isaksson Robin Isaksson

I wonder if this one is Hysterobrevium constrictum

05-02-2015 11:21

Zoltan Lukacs Zoltan Lukacs

Hi all, has someone a PDF of Mycographia, seu Icon

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Hymenoscyphus foliicole
Andgelo Mombert, 06-09-2019 21:49
Bonsoir,

Sur feuille de Alnus alnobetula, vers 1500 m d'altitude.

Spores : 18-22 x 4,5-5,2 µm, scutuloïdes, garnies de guttules sauf au niveau du centre, hyalines, lisses.

Asques : 90-100 x 8-9 µm, cylindriques, à sommet souvent ogival, avec appareil apical amyloïde, sans crochet, contenant huit spores bisériées.

Paraphyses : cylindriques, larges de 3-4 µm, hyalines, contenant une grosse vacuole réfringentes.

Je tourne autour de caudatus... Merci d'avance pour votre aide.

Andgelo
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Hans-Otto Baral, 06-09-2019 21:54
Hans-Otto Baral
Re : Hymenoscyphus foliicole
I could not find the spore size. H. caudatus agg. I agree. 0
Andgelo Mombert, 06-09-2019 22:00
Re : Hymenoscyphus foliicole
Je l'ai ajoutée.

Andgelo
Hans-Otto Baral, 06-09-2019 22:02
Hans-Otto Baral
Re : Hymenoscyphus foliicole
o.k., I think this fits one of the interpretations of H. caudatus.
Andgelo Mombert, 06-09-2019 22:06
Re : Hymenoscyphus foliicole
Merci !
Bernard Declercq, 19-09-2019 13:23
Bernard Declercq
Re : Hymenoscyphus foliicole
Hi Andgelo,

The species you collected has yellow apothecia even when young and strongly refractive vacuolar bodies in its paraphyses. This is a reddening species.

What we in Belgium and the Nederlands collect as H. caudatus is a species with small white apothecia and low refractive vacuolar bodies in its paraphyses. The apothecia are never reddening and are only yellowish to ochraceous when dry.

As Zotto said, your collection fits only one of the interpretations of H. caudatus.

I am afraid that the examination of Karsten's type collection will not resolve our problem and need to neotypify H. caudatus.

Bernard
Hans-Otto Baral, 19-09-2019 13:33
Hans-Otto Baral
Re : Hymenoscyphus foliicole
Hi Bernard
I am not sure that a restudy of the type would not clarify the matter. maybe the oil content and shape & size of the spores would make it easier to select an epitype.

Did White restudy the type?

Zotto
Mirek Gryc, 19-09-2019 14:42
Re : Hymenoscyphus foliicole
I am sorry to interfere in the discussion but recently I found a Hymenoscyphus whose features only fit into H. caudatus?
For the first time in his case I am dealing with yellow fruitbodies. The substrate is also not typical ???
What do you think about this collection?
Mirek
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Hans-Otto Baral, 19-09-2019 17:38
Hans-Otto Baral
Re : Hymenoscyphus foliicole
The group around H. caudatus and H. fructigenus is very complex. The characters are few, and I can only see good species in a few cases, such as maybe on Carpinus fruits or typical H. caudatus with low-refractive VBs as Bernard pointed out. In your fungus I assume the Vbs in the paraphyses were strongly refractive, but now they are distorted. 

Only a molecular study combined with careful vital study will clarify this jungle. I think sequences for typical H. caudatus and H. fructigenus that could serve as a reference are so far lacking, as the avaiable sequences are not conform.

I looked in White 1943 and see that he studied several types of synonyms of H. caudatus but not that of Karsten, but he did not illustrate these types (his Fig. 8 is of little use and I cannot find which collection it belongs). White saw no clear differences even to H. scutula, but kept H. caudatus as distinct for the time being.
Mirek Gryc, 19-09-2019 19:31
Re : Hymenoscyphus foliicole
Thank you for your comprehensive answer.

Mirek


Andgelo Mombert, 20-09-2019 17:35
Re : Hymenoscyphus foliicole
Merci à vous.

Andgelo