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03-08-2021 12:15

Thorben Hülsewig

Hi there,yesterday i found a pyreno on a corylus n

31-07-2021 23:33

Wilhelm Guggisberg Wilhelm Guggisberg

This 20 um, barreled shape, beer keg-like ascospor

02-08-2021 19:16

Castillo Joseba Castillo Joseba

De ayer en bosque de hayas y piceassobre la tierra

18-07-2018 18:02

Elisabeth Stöckli

Bonjour, Trouvé sur feuilles mortes d'Eriophorum

02-08-2021 15:17

Castillo Joseba Castillo Joseba

De ayer en rama de fagus Pequeños aporecios de u

31-07-2021 20:39

Stefan Jakobsson

On the verge of a forest rivulet I found an Ombrop

30-07-2021 17:18

Elisabeth Stöckli

Bonjour, Sur branche morte de Frangula alnus (Bét

01-08-2021 10:00

BERNARD CLESSE BERNARD CLESSE

Bonjour à toutes et à tous,Un ami m'envoie ces d

22-06-2021 01:00

Viktorie Halasu Viktorie Halasu

Dear friends,I'm looking for recent material of Ru

29-07-2021 23:25

Ethan Crenson

Hi all, This is a parasite I found on fruiting bo

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whitish Phaeohelotium
Khomenko Igor, 24-06-2021 21:15
Khomenko IgorA few days ago I found this discomycete in Ottawa, ON, Canada, probably, Phaeohelotium. It was on a very wet and rotten, small piece of wood in an area that always wet and often flooded, under broadleaf shrubs.
Apothecia 1-1.7mm pulvinate.
Asci 8-spored, IKI- (I double checked), clearly croziers(-),
(107.7) 110.3 - 121.2 (122.8) × (12.4) 12.7 - 14.2 (15.3) µm; N = 7
Me = 116.3 × 13.6 µm ;
Paraphyses are cylindrical with multiguttulate VBs.
Ascospores fusiform, OCI=3-4, measure in H2O
(15.5) 17.5 - 21.4 (22.6) × (4.2) 4.4 - 5.2 (6) µm
Q = (3) 3.4 - 4.6 (5) ; N = 20
Me = 19.2 × 4.9 µm ; Qe = 4
Ectal excipulum textura angularis and brown.
I couldn't identify it with European keys. Maybe someone has an idea of what it could be.
Lots of pictures here.
https://inaturalist.org/observations/83985987
I still have a living specimen, so if something is missing I can check it.

Thank you for any help,
Igor

  • message #69280
  • message #69280
Mirek Gryc, 25-06-2021 09:08
Re : whitish Phaeohelotium
Hi Igor

A similar Phaeohelotium griseobrunneum.
Such a name gave him Zotto, probably not yet published?
Let's wait for Zotto's opinion :)

At my place, usually occurs on Alnus.

Mirek
Hans-Otto Baral, 25-06-2021 09:18
Hans-Otto Baral
Re : whitish Phaeohelotium
I can only confirm in a hurry. Maybe you can get also the amyloidity of the subiculum?
Khomenko Igor, 25-06-2021 15:41
Khomenko Igor
Re : whitish Phaeohelotium
Thank you Mirek and Zotto,

Alnus incana probably is the most abundant species in that area.
I got an inamyloid reaction in IKI for the subiculum from a living specimen.
The rest look good for P. griseobrunneum inamyloid H- and my measurements get very close to HB 8295E, only asci a bit larger.


Thank,
Igor

  • message #69291
Hans-Otto Baral, 25-06-2021 17:05
Hans-Otto Baral
Re : whitish Phaeohelotium
Good! This reaction may be variable, I know such variability in different species such as P. imberbis.