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27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

25-03-2024 20:21

DAVID MARCOS DAVID MARCOS

Bonjour, je m'appelle David et je débute dans l'i

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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. :).