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19-07-2024 11:08

Scutellinia nigrohirtula complex 090724
Miguel Ãngel Ribes Miguel Ángel Ribes

Good morningThis Scutellinia from July 9 grew at 1

19-07-2024 10:24

Scutellinia
Kozak Robert

Date: 2024.07.16Loess gorges, on soil with a lot o

04-12-2020 18:23

Marcelleina?
Mirek Gryc

Hello allA friend sent me two collections of small

17-07-2024 11:33

literature request
Angel Pintos Angel Pintos

Hello, anybody body has:Pande A. and Rao, V.G. (1

16-07-2024 18:32

Bryophilous disco on Liochlaena
Andgelo Mombert Andgelo Mombert

Bonsoir, Un discomycète sur Liochlaena lanceolat

17-07-2024 22:37

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Peter Welt Peter Welt

Who can help? Arx, J.A. von. 1973. Ostiolate and

17-07-2024 16:29

Unknown on snail
Andgelo Mombert Andgelo Mombert

Hello,A colleague found an unknown fungus on the s

17-07-2024 10:53

Le Gal M (1959)
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Peter Welt Peter Welt

Who can help? Malloch, D.; Hubart, J.-M. 1987. An

11-01-2022 16:36

Literature request: Raitviir (2004) Revised synopsis of Hyaloscyphaceae?
Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

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Microthyrium on Alnus?
Marc Detollenaere, 19-04-2023 07:31
Marc DetollenaereDear Forum,
On a small branch of Alnus glutinosa I found some small black pyrenomycetes(0.2mm) with hyaline 1-septate spores of 19.5x4.5µ.Each part of the spore contained 2 large guttules. The asci were remarkebly sacculate.Any ideas?

Marc
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Chris Yeates, 19-04-2023 15:21
Chris Yeates
Re : 1-septate pyreno on Alnus
Hi

Tricky one. The asci and spores (though not the perithecium, from what I can see) remind me a little of Microthyriales. Were the perithecia/pseudothcia flattened? Might the spores have very thin appendages? (oil immersion + cotton blue).

Cordialement, Chris
Marc Detollenaere, 19-04-2023 18:49
Marc Detollenaere
Re : Microthyrium on Alnus?
Hi Chris,

It looks indeed as a Microthyreaceae. Following the genus key, I arrived at Microthyrium but in Microthyrium I have no match.No appendages or cilia were seen in cottonblue.
Another genus?
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Alain GARDIENNET, 20-04-2023 21:55
Alain GARDIENNET
Re : Microthyrium on Alnus?
Bonsoir Marc,
Je serais plutôt du même avis que Chris. Qu'est-ce qui te fait penser à un Microthyrioaceae ? la forme des ascomes en forme de thyriothèces ?
La structure de la paroi ne colle pas, la micro non plus. J'opterais davantage pour un Mycosphaerella. Mais je peusx me tromper.
Alain
Marc Detollenaere, 21-04-2023 10:18
Marc Detollenaere
Re : Microthyrium on Alnus?
Thanks Alain for your remarks. I will look further
Marc