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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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Help with this species :D
Man Myco, 25-06-2021 13:56
Man MycoHello,

I am working on this species, but I cannot figure out where it may be positionned...

Any help with its taxonomic position would be greatly appreciated !

Best regards,

R.
  • message #69287
Man Myco, 25-06-2021 14:19
Man Myco
Re : Help with this species :D
I am adding below some description features that may help :

- Ascomata (0.3-)0.4-0.8(1.1) mm in the longest length
- Hymenial disc with a calcium oxalate crystals layer covering the disc
- Hymenium 125-140 µm high, I-, K/I-
- Paraphyses cellular, simple (sometimes furcate or geniculate at apex), 2.5-3 µm wide, but 4 µm thick toward the apices
- Ascospores 30-35 x 11.5-13.8 µm

Many thanks for your help !
Hans-Otto Baral, 25-06-2021 17:08
Hans-Otto Baral
Re : Help with this species :D
Hi

Can you tell us the substrate?

Are the asci saccate? Any apical thickening in dead state?

Are the apos elongate?
Man Myco, 25-06-2021 17:52
Man Myco
Re : Help with this species :D
Hi !

thanks for your message ! Here are some additional features which may help (I hope ;))


Ascomata numerous, evenly distributed, variable in shape, elongate-sublirelliform or angulose-subrounded, simple, unbranched, sometimes slightly crenulated, immersed, at most leveled with the bark, (0.3-)0.4-0.8(1.1) mm in the longest length, hymenial disc exposed, flat, black to greyish due to a calcium oxalate crystals layer covering the disc, surrounded by a thin black border of visible and persistent excipulum.

Hymenium mostly hyaline, with a brownish-olivaceous in upper part, not inspersed or sometimes a few very little oil droplets, 125-140 µm high, I-, K/I-. Paraphyses cellular, simple (sometimes furcate or geniculate at apex), 2.5-3 µm wide, but 4 µm thick toward the apices.

Asci subglobose to shortly clavate, bitunicate, thickened at the apex and with a short internal apical beak when young, I-, K/I-. 8-spored, 65-80 x 35-40 µm.

Ascospores hyaline at first in the asci but brown at maturity before discharge, finely ornamented, I-, ellipsoid to sole-shaped, 1-septate, straight, constricted at the septum, upper cell often slightly bigger, both cells with an internal thickening of the wall in their central part (most mature ascospores seems to be in fact 3-septate...), 30-35 x 11.5-13.8 µm, perispore absent.

The substratum is a branchlett of Psiadia altissima ; location is Mozambique Channel.

Best regards,

R
Hans-Otto Baral, 25-06-2021 18:24
Hans-Otto Baral
Re : Help with this species :D
So an apotheciod species with bitunicate, saccate asci. Spore shape would fit such a dothidealean taxon. A tropical species probably. I am not familiar with such fungi.
Adam Polhorský, 25-06-2021 18:28
Re : Help with this species :D
Hi,

I would look at Stigmatodiscus. You probably won't find a perfect fit, as all described species are from Europe.

A.
Man Myco, 25-06-2021 18:44
Man Myco
Re : Help with this species :D
Hi,

Thank you very much ! Stigmatodiscus seems a very good direction !

Bests,

R