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28-01-2023 12:27

Juuso Äikäs

These were growing on a piece of thick Salix capre

27-01-2023 23:08

Patrice TANCHAUD

Bonsoir, récolte réalisée sur excréments ou p

27-01-2023 14:41

Juuso Äikäs

A couple days ago I found a plentiful growth of th

09-01-2023 14:08

Zoltan Lukacs Zoltan Lukacs

Anyone got an idea? It's immature material, but th

26-01-2023 15:23

Marja Pennanen

Hello forum. I collected some dark ones on Pinus

24-01-2023 19:53

ruiz Jose antonio

Hola,en restos de quemados,de unos 4 a 5 mm. Espor

24-01-2023 23:30

Josep Torres Josep Torres

Hola.Una Botryosphaeriaceae sobre la corteza de un

09-01-2023 08:14

Francisco  SÃNCHEZ Francisco SÁNCHEZ

Ascomiceto anaranjado sobre suelo desnudo, 29/12/2

23-01-2023 13:38

Castillo Joseba Castillo Joseba

Me mandan elo material seco de Galicia (España) r

16-01-2023 21:31

Riet van Oosten Riet van Oosten

Hello, Nearby the find of Calycina claroflava on

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Dialonectria on Diatrypella
Juuso Äikäs, 16-11-2022 19:57
A couple days ago I found some old Diatrypella fruitbodies that had Dialonectria perithechia growing on them. The Diatrypellas were growing on a thin Betula branch that was attached to a fallen tree. There were spores to be found of both species, but unfortunately these were rather old fruitbodies, so there were no asci to be found.

Diatrypella spores:

(5) 5.6 - 6.2 (6.5) × (1.2) 1.24 - 1.7 µm
Q = (3.4) 3.41 - 4.6 (5.2) ; N = 10
Me = 5.9 × 1.5 µm ; Qe = 4

Dialonectria spores:

(7.6) 7.64 - 9.47 (9.5) × 3.9 - 4.2 µm
Q = 2 - 2.3 ; N = 5
Me = 8.6 × 4 µm ; Qe = 2.1

I suspect this might be a case of Dialonectria episphaeria growing on Diatrypella favacea, although the spores are maybe a bit small for both species. 

Is this data enough to say anything with certainty, or are there other possibilities?
  • message #74372
  • message #74372
  • message #74372
  • message #74372
Andgelo Mombert, 17-11-2022 08:28
Andgelo Mombert
Re : Dialonectria on Diatrypella
Bonjour,
Dialonectria episphaeria ne pousse que sur Diatrype sp.
D'après moi, il s'agit ici d'un Stylonectria. Beaucoup des espèces de ce genre ne sont pas spécifiques à un hôte et il n'est pas possible de les identifier sans culture.
Juuso Äikäs, 17-11-2022 10:57
Re : Dialonectria on Diatrypella
Ah ok -- thank you. Maybe I'll just try to avoid Nectria s.l. :).