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03-05-2025 12:43

Setose coelomycete on leaves of Rosa rugosa
Matthias Reul Matthias Reul

Hi together, Maybe someone has an idea about this

02-05-2025 13:29

Bryomyces
Isabelle Charissou

Bonjour, j'aimerais savoir s'il y a eu des public

03-05-2025 18:35

Michel
Edmond POINTE Edmond POINTE

J'ai  connu Michel au début de ma passion pour l

08-07-2023 19:24

Mollisia on Quercus twig
Juuso Äikäs

These Mollisia fruitbodies were growing on a twig

02-05-2025 08:45

Question de traduction
Isabelle Charissou

Bonjour, existe-t-il un pdf d'un Glossarium polygl

02-05-2025 08:41

Monilinia on Prunus padus
Tony Moverley

A Monilinia type fungus has recently been collecte

01-05-2025 20:11

Martininia with bisporic asci?
Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, today I have collected a tiny ascomycete g

01-05-2025 11:25

Calosphaeriale (?) sur écorce de Corylus avellana
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

02-05-2025 10:16

Asco noir sur tige morte d'Angelica sylvestris
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

01-05-2025 21:07

recherche d'un article
Isabelle Charissou

Bonjour, j'aimerais pouvoir consulter l'article s

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Hysterioid on Picea
Juuso Äikäs, 12-02-2025 12:34
Yesterday I found some hysterioid fungi growing on the inner side of loosened bark attached to a dead, standing Picea abies trunk.

Asci bitunicate and 8-spored, spores brown and 4-celled, measuring:

18.6 - 22.9 × 6.0 - 7.5 µm, Q = 2.7 - 3.4; avg = 21.1 × 6.8 µm, Qav = 3.1, n = 5


This keyed out to Hysterium acuminatum, but that species is supposed to grow on deciduous wood.


Any thoughts what this might be?

  • message #81574
  • message #81574
  • message #81574
Ethan Crenson, 13-02-2025 18:07
Re : Hysterioid on Picea
Hi Juuso,

I'm interested to know what key you are using that arrives at H. acuminatum. Using Boehm's key I get to Hysterium angustatum. The spores do fall within the range, though looking at your images, some of them seem to be a bit broad. The Boehm key says "Phragmospores (12-) 14-21 (-28) x (3-)4-8(-10)µm, firmly 3 septate, no septal constrictions, end cells obtuse, cosmopolitan."   I don't find H. angustatum on Picea, but we don't have much spruce around here to begin with. 

Ethan
Adam Polhorský, 13-02-2025 18:15
Re : Hysterioid on Picea
Hi Juuso, without comparing too thoroughly this should be the common resinicolous Mytilinidion that appeared here several times. I think you also had it in the past. 

Adam
Juuso Äikäs, 13-02-2025 18:39
Re : Hysterioid on Picea
Hi Ethan,

I used the "Key to hysterioid fungi on bark and wood in Scandinavia" (found on Researchgate) as a key. I just read a little from the book Fungi of Temperate Europe (vol. 2), and it says about H. acuminatum that it is "Also knowns as H. angustatum".
Juuso Äikäs, 13-02-2025 18:41
Re : Hysterioid on Picea
Hi Adam,

yes, you could be right -- this could indeed be that same undescribed species. Since this wasn't growing on resin, this didn't occur to me earlier.
Ethan Crenson, 13-02-2025 19:14
Re : Hysterioid on Picea
Mytilinidion would make more sense on Picea. The macro photos look a lot like a Hysterium, not so much like a bivalve.  Very interesting.