Accès membres

Mot de passe perdu? S'inscrire

01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

« < 1 2 3 4 5 > »
unknown chaetomium
Joop van der Lee, 13-11-2013 14:20
Joop van der LeeFound on horse dung also found on sheep dung in the same area.


Perithium is covered with non septated, non crustated, thickwalled  curled hairs 2.7u8-3.48 um wide

Upper part has rigid stiff and curled, septated thick walled hairs 4.27-5.22 um wide.

Asci: 8-spored, 42.39x11.24 um

Spores: lemon shaped, 8.51-9.38xs7.41-7.96x6.32-6.91 um

When young they have an olive-green colour. 

It also has a funnel to assist in releasing spores, when process is completed only the fruitbody with rigid non curling hairs remain.

  • message #25800
  • message #25800
  • message #25800
  • message #25800
  • message #25800
  • message #25800
  • message #25800
  • message #25800
  • message #25800
  • message #25800
Norbert Heine, 13-11-2013 17:45
Norbert Heine
Re : unknown Chaetomium
Hello Joop,

species of the genus Chaetomium are difficult to determinate!
It needs a lot of literature like Arx et al - The Ascomycete Genus Chaetomium, 1986 or Doveri - An update on the genus Chaetomium, PdM 29, 2008.
And it needs a lot of experience and patience.

Even then the determination is not easy!

There are some species with nearly the same spore size and similar hairs!
Maybe that your species is Ch. crispatum, but Ch. convolutum is also an option.
The common Ch. bostrychodes has similar, but slightly smaller spores.

An updated world wide key you can find in the latest work by Francesco Doveri.

http://www.mycosphere.org/pdfs/MC4_4_No17.pdf

Best wishes

Norbert