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19-08-2022 22:26

Juuso Äikäs

A few years ago I found a group of olive-brown fru

19-08-2022 19:05

Stefan Jakobsson

On a petiole of a leaf of what seems to be Populus

09-08-2022 20:06

Stephen Mifsud Stephen Mifsud

I have found an interesting aspergillus on flowers

13-08-2022 17:18

Stephen Mifsud Stephen Mifsud

I assumed these are weak colonies of Neurospora on

18-08-2022 17:50

Thomas Læssøe

https://svampe.databasen.org/observations/10283042

10-08-2022 15:45

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

02-08-2022 17:48

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

16-08-2022 20:07

Bernard Declercq Bernard Declercq

Good evening,Who could be so kind to supply me fol

07-01-2014 23:04

Michel Hairaud Michel Hairaud

Bonjour à tous, Hi to all. This tiny bright yell

16-08-2022 15:50

Thomas Læssøe

https://svampe.databasen.org/observations/10283169

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Ceratosphaeria?
Enrique Rubio, 31-03-2016 21:07
Enrique Rubio

Hi forum


These scattered, more or less inmersed, black, ostiolate, glabrous, lageniform perithecia, 0.3-0.5 mm long, with elongated cylindrical necks 100-200 microns long, were growing on indeterminate semirotten wood together with pseudothecia of Capronia cf. pilosella.


The asci are shortly stipitate, with a conspicuous refractive, IKI negative, apical apparatus, 170-194 x 10-12 microns, with 8 obliquely 1-seriate, hyaline, 4-celled ascospores. Paraphyses often collapsing.


I think this fungus should be near the genus Ceratosphaeria but any species seems to fit well with my collection.


Have yo some idea for me?


Thanks again

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Enrique Rubio, 31-03-2016 21:21
Enrique Rubio
Re : Ceratosphaeria?
Could Chaetosphaeria (Zignoella) ovoidea be a good possibility for it?
Peter Wilberforce, 01-04-2016 12:14
Re : Ceratosphaeria?
Hello Enrique,,
Your collection seems to be referrable to  Ceratosphaeria, characterised by the elongated beak, spores having several cross walls, often more than three..By definition the genus Zignoella  has at most a papillate ostiole, and spore cross walls at most three.
Suggested taxa for your collection are Ceratosphaeria crinigena or possibly C. rhenana 
Kind regards,
Peter
Jacques Fournier, 01-04-2016 14:21
Jacques Fournier
Re : Ceratosphaeria?
Hola Enrique,
since the great work done by Martina Réblova it became unfortunately challenging to assign one of these beaked fungi to a genus without the asexual morph and molecular data.
There is a good overview of these fungi with a key to genera in Réblova 2013, Mycologia 105: 462-475. Your fungus might have affinities with Ceratolenta caudata but has significantly larger ascospores.
Enrique, you should make an effort to find fungi that exist!

Saludos,

Jacques
Enrique Rubio, 01-04-2016 16:08
Enrique Rubio
Re : Ceratosphaeria?
OK. Many thanks Peter and Jacques. Certainly I'm not lucky with the fungi that exist!
Hans-Otto Baral, 01-04-2016 20:36
Hans-Otto Baral
Re : Ceratosphaeria?
I am not really certain but this looks to me like images I have under Annulusmagnus triseptatus. For instance, a collection by Enrique on Rubus from Sept. 2015.  The apical ring is a bit thinner, but otherwise?

Zotto
Enrique Rubio, 01-04-2016 20:52
Enrique Rubio
Re : Ceratosphaeria?

You are right, Zotto! Your memory is surprising...http://www.ascofrance.fr/search_forum/38103 But for this collection on Rubus, also out and far of the water, i could not to observe the inmersed ascomata. But I think Annulusmagnus has greater ascospores and a more conspicuous, very congophilous, apical apparatus.


Who knows!