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06-11-2025 16:50

Hymenoscyphus sp?
Rot Bojan

Hello! Yesterday I found a fungus on or near a nee

04-11-2025 14:53

Leptosphaeria?
Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

05-11-2025 11:33

Cladosporium ?
Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Hymenoscyphus on blueberry.
Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Protounguicularia transiens?
Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

03-11-2025 21:34

Tatraea sp. ? on Populus tremula
Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

Ascomycetes
David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Bright orange stalked asco
Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hymenoscyphus phiala
Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Telogalla olivieri
Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

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Patellaria atrata ou Claussenomyces atrovirens ??
Bernard CLESSE, 09-02-2020 20:39
Bernard CLESSESur tronc mort et décortiqué de chêne en ambiance humide.

Je pensais à Patellaria atrata mais Raul Tena Lahoz propose Claussenomyces atrovirens, que je ne connaissais pas. 

Pourriez-vous donner votre avis et me dire quelle est la différence entre ces deux taxons ?

Grand merci d'avance !

Bernard
  • message #61439
  • message #61439
  • message #61439
Hans-Otto Baral, 09-02-2020 20:45
Hans-Otto Baral
Re : Patellaria atrata ou Claussenomyces atrovirens ??
Thsi difference is huge: Patellaria forms septate spores with a high oil content that are ejected as such. Clauss. atrovirens and related species forms septate spores with low oil content (see your photo) and these spores germinate inside the immature asci to form numerous minute conidia. The conidia aggregate in balls, see your photo. The balls are ejected. Some conidia are floating in your preparation. they are rod-shaped and also the possible absence of longisepta in the ascospores (only cross-septa) point against atrovirens.

A difficult genus with some undescribed species. Look in my folde and compare e.g. C. munathinus and C. xylophilus.

The genus stands in the Phacidiales, Tympanidaceae.
Raúl Tena Lahoz, 09-02-2020 20:59
Raúl Tena Lahoz
Re : Patellaria atrata ou Claussenomyces atrovirens ??
In fact, my anwser to Bernard was to draw his attention to Claussenomyces... I didn't try to get deeper in this difficult genus.
Cheers,
Raúl
Bernard CLESSE, 09-02-2020 21:22
Bernard CLESSE
Re : Patellaria atrata ou Claussenomyces atrovirens ??
Great thanks Peter, Raul and Zotto !!

I learned a lot of new things again! What an extraordinary forum!


And sorry to have generated two discussions instead of one (a handling error!)


Bernard