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24-03-2026 21:37

Helminthosphaeria
Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

25-03-2026 10:35

Encoelia impudicella?
Hulda Caroline Holte

Hello,I collected this species growing on a dead b

26-03-2026 15:31

Hymenoscyphus ombrophiliformis?
Ãke Widgren Åke Widgren

Hello,I found this one in October last year, on r

26-03-2026 12:50

Pseudombrophila
David Chapados David Chapados

Hi,I'm having a hard time figuring which Pseudombr

26-03-2026 11:17

asco in Ulmus
Vasileios Kaounas Vasileios Kaounas

Found 11-03-26, in leaf of Ulmus sp. Diameter 2-4

25-03-2026 22:23

Orbilia with resin deposits
Marc Detollenaere Marc Detollenaere

Dear Forum,On a debarked stem of Tilia, we found s

24-03-2026 15:44

Leptodontidium cf. trabinellum
Åge Oterhals

I hope someone can confirm the name of this collec

25-03-2026 20:53

Didymopsis helvellae on Helvella?
François Bartholomeeusen

Dear forum members,On 23 March 2026, I found sever

23-03-2026 20:16

Coprotus 210226 315
Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningI'm unable to identify this Coprotus o

25-03-2026 15:06

Hyaloscypha albohyalina à confirmer
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me confirm

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Aquatic sordariomycete - Ceratosphaeria?
Ibai Olariaga Ibarguren, 11-12-2013 08:37

 


Hi there,


I am trying to identify a non-stromatic pyrenomycete growing on submerged wood in a small stream from Tyresta, south to Stockholm (Sweden). The are is granitic and the water was dystrophic.


The perithecia grow in small groups, semiimmersed or almost superficial. the venter globose-subglobose, 0.6-0.8 mm, black, with a short cylindrical neck, apparently smooth. Asci unitunicate, cylindrical, 8-spored, with a distinct apical annulus, inamyloid (tested in Melzer), 196-210 x 10-11 µm. Spores ellipsoid-fusiform, with abundant guttules, 3-septate, 25.5-28.5 x 8.5-9.5 µm. The perithecial wall is composed of several layers of subglobose cells.


I initially thought it might be a Chaetosphaeria, but the asci are inamyloid. Then I searched in Ceratosphaeria, and also Zignöella, but did not find any species that fit.


Any idea? Thanks in advance!


Cheers,


Ibai.


 


 

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  • message #26182
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Martin Bemmann, 11-12-2013 08:46
Martin Bemmann
Re : Aquatic sordariomycete - Ceratosphaeria?
Hi Ibai,

try Annulatascaceae like this one:
http://www.ascofrance.fr/search_recolte/2457

Regards
Martin
Alain GARDIENNET, 11-12-2013 08:47
Alain GARDIENNET
Re : Aquatic sordariomycete - Ceratosphaeria?

See  towards Annulusmagnus triseptatus


Alain

Alain GARDIENNET, 11-12-2013 08:48
Alain GARDIENNET
Re : Aquatic sordariomycete - Ceratosphaeria?

Oh you were too fast Martin ! Grrrrr....


 

Ibai Olariaga Ibarguren, 11-12-2013 10:50
Re : Aquatic sordariomycete - Ceratosphaeria?

 


Thanks Martin and Alain! I had ruled out Annulatascaceae for some reason,but it fits A. triseptatus with no doubt.


I see now that there was a previous record of A. triseptatus from south Sweden.


Cheers,


 


Ibai.