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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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Anamorph on Ulmus twig related to Splanchnonema foedans???
François Bartholomeeusen, 10-08-2022 18:45
Good evening all,

On 5 August 2022, a friend gave me a piece of a branch of Ulmus (13 cm long, 2.5 cm in diameter) covered with an anamorph. Under those white/pink spots, the bark was covered with green algae and lichens.
The conidia with 1 sept (slightly off-centre and slightly contracted there) have the following dimensions: 20.3 - 24.5 × 10.6 - 12.7 µm; Q = 1.8 - 2.2 ; Me = 22.5 × 11.6 µm .


When wiping off those downy spots I found white bumps in the bark, under which were black perithecia with 1 ostiole that contained very dark spores with following dimensions:
43 - 55.5 × 18.6 - 22.6 µm; Q = 2 - 2.7; Me = 50 × 20.9 µm.


Due to the age of the branch, the prevailing dryness and heat, the material to be examined was in poor condition. With the key of ME Barr Mycotaxon Vol XV 1982 I could identify the ascomata as: Splanchnonema foedans.


My question is twofold: 1) Can someone confirm my determination?
2) Is the anamorph related to S. foedans and can it be identified?


Many thanks in advance,


François Bartholomeeusen

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François Bartholomeeusen, 10-08-2022 18:50
Re : Anamorph on Ulmus twig related to Splanchnonema foedans???
Herewith some more pictures with regard to the asco Splanchnonema foedans!

François Bartholomeeusen
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Bernard Declercq, 11-08-2022 20:03
Bernard Declercq
Re : Anamorph on Ulmus twig related to Splanchnonema foedans???
Hi François,

This is Splanchnonema foedans indeed, most probably a new species for Flanders.
The anamorph is Arthobotrys-like.

All the best,
Bernard
François Bartholomeeusen, 11-08-2022 21:15
Re : Anamorph on Ulmus twig related to Splanchnonema foedans???
Thank you very much Bernard,

Despite the poor condition of the substrate, this is still a good find. Your choice for Arthrobotrys is more than plausible. I'm leaving for a week in the coolness of the coast and will try to elaborate on this find upon my return.
Thanks again for your reaction,

François