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26-04-2026 21:08

William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

24-04-2026 03:16

David Chapados David Chapados

Found while looking at something else from wood in

22-04-2026 01:06

Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

22-04-2026 20:17

Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

23-04-2026 06:46

François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

22-04-2026 19:12

Louis DENY

Bonjour forum.Trouvé à Belfort, est de la France

21-04-2026 21:00

Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

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Arachnopeziza delicatula
Louis DENY, 06-04-2026 11:07
Bonjour forum,

Trouvé sur bois de feuillu très dégradé cette arachnopeziza, qui ressemble à A. delicatula des dossiers de Zotto. Les spores plus courtes et plus larges m'ont l'air caractéristique. (Caluler le nombre précis de septa m'a été impossible)

J'ai lu sur ce forum des discussions sur la distinction A. delicatula/A. aurata.

La question est-elle tranchée: A .delicatula est-elle une ''bonne'' espèce?

Merci de vos lumières
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Hans-Otto Baral, 06-04-2026 16:49
Re : Arachnopeziza delicatula
At first glance yes, but I remember the issue is difficult. I think Kosonen treats the species in his paper.
Ethan Crenson, 06-04-2026 17:20
Re : Arachnopeziza delicatula
I have struggled with the distinction between A. delicatula and A. aurata.  I have these comments handy on my desktop:

"[A. delicatula] can be distinguished from A. aurata by the width of the spores that are on average wider in A. delicatula (3 – 3.5 ?m wide in the longest spores) and by the Q-value that is in average less than 20 in A. delicatula and above 20 in A. aurata."

"We suggest that A. aurata is distinguished from A. delicatula by narrower, pointed and straight or curved spores, with regularly 6–7 septa."


Taxonomy and systematics of Hyaloscyphaceae and Arachnopezizaceae
T. Kosonen, S. Huhtinen, K. Hansen
Louis DENY, 06-04-2026 17:48
Re : Arachnopeziza delicatula
Zotto, Ethan,

Thanks for your adice and information.
I will then call it delicatula.
Kosonen Timo, 06-04-2026 17:55
Kosonen Timo
Re : Arachnopeziza delicatula
yep, I agree on delicatula. The spores of aurata resemble long (e.g. Pinus) needles. The difference is clear once compared side by side.

Timo
Louis DENY, 06-04-2026 19:01
Re : Arachnopeziza delicatula
Timo,
Many thanks for your confirmation
Louis