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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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Melanopsammella
Bernard Declercq, 05-11-2013 17:37
Bernard DeclercqHello everyone,

Collected on a decorticated branch of Quercus robur here in Belgium:
Ascomata superficial to slightly immersed, subglobose, 0,1-0,15 mm diam., papillate, pale brown, covered by black setae. Asci  cylindrical, apex truncate, 8-spored but mostly observed with 16 part-spores, 42-47x6 µm. Spores fusiform, constricted 1-septate, soon disarticulating in part-spores; part-spores ellipsoid to wedge-shaped, smooth, hyaline, 3-3,5x1,5-2 µm. Paraphyses soon disappearing.  Ectal excipulum of pale brown, small-celled textura ?epidermoidea; setae acute, base swollen, smooth, thin-walled, aseptate, blackish, 39-56x7-10 µm.
With those Hypocrea-like spores, this must be a Melanopsammella? Unfortunately, I only have documentation of species with septate hairs.
Your help is welcome.

Bernard


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Hans-Otto Baral, 05-11-2013 21:19
Hans-Otto Baral
Re : Melanopsammella
Hi Bernard


this reminds me strongly of Trichosphaerella decipiens, with apically acute, mainly unbranched setae. But what I know under that name (on Peniophora) has globose, finely warted spores.

But Ellis & Ellis (pl. 1193 in centre of plate) figure elongate spores.

Similar is Neorehmia ceratophora, with antler-like setae and also globose warted spores.

Zotto
Enrique Rubio, 12-02-2016 17:45
Enrique Rubio
Re : Melanopsammella

Hi to everybody


This collection of a Trichosphaerella/Melanopsamella species on decorticated wood of Sambucus nigra seems to be very close with Bernard's collection on Quercus.


Has someone more suggestions about it?


Thanks again

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Hans-Otto Baral, 12-02-2016 17:53
Hans-Otto Baral
Re : Melanopsammella
Yes, there are similarities!

I fear that nobody will see your posting except me and Bernard?
Enrique Rubio, 12-02-2016 18:08
Enrique Rubio
Re : Melanopsammella
Yes, Zotto. I think this is not easy
Enrique Rubio, 12-02-2016 18:24
Enrique Rubio
Re : Melanopsammella

Has someone this article? Samuels & M.E. Barr (1998) Notes on and additions to the Niessliaceae (Hypocreales): Can. J. Bot. 75(12): 2166 ['1997']


Maybe it could help us...

Guy Garcia, 12-02-2016 18:35
Re : Melanopsammella
Salut Enrique,

Le voilà.

Amitiés, Guy
Enrique Rubio, 12-02-2016 18:37
Enrique Rubio
Re : Melanopsammella
Merci beaucoup, Guy
Enrique Rubio, 12-02-2016 18:52
Enrique Rubio
Re : Melanopsammella
After reading the manuscript I think these both fungi belong to Trichosphaerella, at least s. Samuels & Barr, but it is not T. decipiens, the only described species in the text, with  disarticulating ascospores in subglobose (spiny?) part-spores. The ascospores of our fungi are somewhat smooth and wedge-shaped, more or less fitting with Ellis & Ellis plate.
Guy Garcia, 13-02-2016 07:49
Re : Melanopsammella
Voici un article récent où il est décrit un nouveau Trichosphaerella bryophile et des précisions intéressantes sur le genre.