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06-06-2009 10:14

Platystomum obtectum
Alain GARDIENNET Alain GARDIENNET

Bonjour, Quelqu'un aurait-il la description de c

05-06-2009 22:24

Clé Cudoniella
Yannick Mourgues Yannick Mourgues

Bonsoir. Je cherche une clé des Cudoniella. I'

04-06-2009 16:48

Several Ascomycetes on Salix.
Guy Marson

In Salix thickets like this one: http://www.giga

04-06-2009 14:19

hairy ascomycet
Gernot Friebes

Hello, I try my luck again with this ascomycet.

03-06-2009 19:54

A determiner.
roman vargas alberto

Bonjour. Ces spécimens collectés sur la terr

03-06-2009 14:04

Cosmospora on Diatrype bullata
Guy Marson

Salut Christian, dear all, this might be of in

03-06-2009 01:20

Lophodermium aff seditiosum
Miguel Ãngel Ribes Miguel Ángel Ribes

Good night First of all I though it will be L.

02-06-2009 20:31

Tiny black ascomycet 2
Gernot Friebes

Hello again, here another one I could not deter

02-06-2009 20:22

Tiny black ascomycet 1
Gernot Friebes

Hello, can you help me with this ascomycet? Hos

02-06-2009 14:04

Pronectria sp. ?
Pascal RIBOLLET

Bonjour à tous, je bute sur cette petite Hypocre

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Unknown beheaded stubble lichen
Erik Van Dijk, 07-02-2022 19:22
I recently found in moisty riparian forest with willows along the Rhine the following lichen/fungus. It appeared like a beheaded stubble lichen. Investigation with the microscpe revealed in the top a collection of spores. 

The spores were 45-50 um by 3-4 um. 

See the following link.
https://waarneming.nl/observation/233387391/

Other observers in the Netherlands have found the same unknown species. See:  
https://waarneming.nl/observation/134021261
https://waarneming.nl/observation/223933166/

Does anyone has any idea?
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Adam Polhorský, 07-02-2022 20:40
Re : Unknown beheaded stubble lichen
I saw similar/same fungus recently, so I think I can help.
Look here https://doi.org/10.1139/b85-051
The best fit for your fungus seems Morrisographium boudieri.
Conidia from my collections often exceeded 50um so I decided for M. ulmi.

I think only M. boudieri is known from Europe, however I'm unsure of boundaries between these 2 species. Here are some pics https://drive.google.com/drive/folders/1a5WOxiTO_-fRC_ZTJqoL_CWG9EQta1Dg?usp=sharing

I saw it on Acer campestre and Cornus mas bark, what could be your substrate?
Erik Van Dijk, 08-02-2022 20:02
Re : Unknown beheaded stubble lichen
Thank you for you response.

It looks indeed rather similar. My substrate was willow. 

The entire genus Morrisographium is until not found in the Netherlands, but these tiny fungus might easily be overlooked.