Accès membres

Mot de passe perdu? S'inscrire

19-04-2023 07:31

Microthyrium on Alnus?
Marc Detollenaere Marc Detollenaere

Dear Forum,On a small branch of Alnus glutinosa I

21-04-2023 08:55

The Richard P. Korf Memorial North American Ascomycete Foray
Danny Newman Danny Newman

Hello AscoFrance, It is with great excitement and

20-04-2023 15:56

Durella on Quercus
Juuso Äikäs

These little black ascos were growing on the upper

14-04-2023 21:29

Mollisia with positive KOH reaktion
Dirk Gerstner

Hello all, I found this Mollisia on 12.04.2023 on

17-04-2023 11:52

Pirottaea cf. veneta on Hellebornis purpurascens (Ranunculaceae)
Alex Akulov Alex Akulov

Dear colleaguesYesterday on the dead overwintered

18-04-2023 09:59

Acrospermum spec. on Cytisus scoparia
Marian Jagers Marian Jagers

Hello, Anyone familary with the genus Acrospermum

17-04-2023 19:52

literature request
Angel Pintos Angel Pintos

Hello,anybody has the following work:Valsaria insi

16-04-2023 10:19

Does Coprotus subcylindrosporus exist?
Maria Plekkenpol

Hello,On cowdung I found a Coprotus last week. The

16-04-2023 10:52

Ascobolus roseopurpurascens (?) sur crotte chevreuil (deer dung)
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Suis-je dans le bon avec

13-04-2023 10:07

Discomiceto??
Castillo Joseba Castillo Joseba

me mandan elmaterial seco de Galicia (España)  r

« < 154 155 156 157 158 > »
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
  • message #75891
  • message #75891
  • message #75891
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?
  • message #75894
  • message #75894
  • message #75894
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