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11-02-2026 22:15

Rutstroemia maritima?
William Slosse William Slosse

Today, February 11, 2026, we found the following R

11-02-2026 19:28

Peziza spec. from Germany
Lothar Krieglsteiner Lothar Krieglsteiner

on small deciduous twig on the ground in forest wi

25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

10-02-2026 17:42

Hélotiale blanche sur Sambucus racemosa
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me donner

10-02-2026 18:54

Unknown pink heliotale on sphagnum
Erik Van Dijk

Does anyone has an idea what fungus species this m

09-02-2026 20:10

(2 different or one ?) Hypoxylon from the Algarve – on Acacia and Arbutus
Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Cistella granulosella of Hyphodiscus incrustatus?
Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

09-02-2026 11:42

Lachnum sp.
Ã…ge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

02-02-2026 21:46

Dark disc on Populus
Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

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Nectriopsis rubefaciens?
Niek Schrier, 16-01-2022 18:26
Hi everyone,

I found a (lichenicolous?) fungi growing on thallus of Parmelina pastillifera. From a macro perspective, they look like Nectriopsis rubefaciens: small fuiting bodies wit perithecial hairs. However, the spores I sofar see in my samples are not corresponding with the spores of N. rubefaciens. The are 1-celled, 12,1 - 15,9 x 2,5-3,2 micrometer (1 div = 2,9 um).

Does anyone know what species this is? Thanks in advance!

Kind regards,
Niek Schrier
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Franz Berger, 16-01-2022 20:14
Franz Berger
Re : Nectriopsis rubefaciens?
The determination is correct! The actual name is Trichonectria r. now, due to some marginal discriminating features to Nectriopsis, (which has not been valuated by gen sequences until now).
To my knowledge, Parmelina pastillfiera is a new host lichen! 

Franz Berger
Niek Schrier, 16-01-2022 21:04
Re : Nectriopsis rubefaciens?
Thank you for the conformation Franz! So the spores can variate for this species? Or are these undeveloped 1-celled spores which become the 2-celled spores I see in documentation about this species? 
I also cound not find any note for this species hosting on Parmelina pastillfiera, but did read it hosts on Parmeliaceae, indicating it has a lot of hosts to choose from.

Niek Schrier
Franz Berger, 17-01-2022 14:21
Franz Berger
Re : Nectriopsis rubefaciens?
It was supposed by some authors, that T.rubefaciens could be an agglomerate of species. There are not so many hosts known till now, mostly it was found on Parmelia sulcata and P.saxatilis agg. I have a collection on Flavoparmelia caperata with much longer ascospores, affirming this hypothesis. And one on Parmelina tiliacea.
1-celled ascospores might be very young ones or mature  broken into 2 parts.  Irregularities can be observed sometimes, Not only in T.rubefaciens. 
Keep an eye on this specimen. I was informed recently, that a working group in Krakau  is starting to investigate  Hypocreales in nearer future. 
Yours
Franz