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Lothar Krieglsteiner
Found on hanging tiwg of Olea europaea in dried-ou
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Bernard CLESSE
Bonsoir à toutes et tous,Pourriez-vous m'aider à
29-04-2026 08:01
Lothar Krieglsteiner
... on twig attached to small tree of Citrus auran
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Lothar Krieglsteiner
growing at moist, drying-out soil at the side of a
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Vitus SchäfftleinHello, I found Trochila ilicina on Ilex aquifoliu
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Pablo Sandoval
Hola a todos,Espero se encuentren bien. Hace mucho
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Lothar Krieglsteiner
... still attached at standing tree. The green con
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Lothar Krieglsteiner
... on twig in the air at standing Ceratonia siliq
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Tony MoverleyCollected 23rd April 2026, Norfolk, EnglandSwarms
Microthyrium on Alnus?
Marc Detollenaere,
19-04-2023 07:31
Dear 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
Chris Yeates,
19-04-2023 15:21
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
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?
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?
Alain GARDIENNET,
20-04-2023 21:55
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
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
Re : Microthyrium on Alnus?
Thanks Alain for your remarks. I will look further
Marc
Marc