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27-04-2026 20:52

Mollisia or related genus from Portugal - with quite peculiar character
Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Micropodia pteridina?
Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

another anamorph on monocotyleous remains from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

bright green minute anamorph on Citrus aurantius-twig from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

anamorph on monocotyleous leaves from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Spiral conidial crust
Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Microdiplodia henningsii
Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

Ramularia sp ?
William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

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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