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17-11-2009 22:22

Pablo Chacón Pablo Chacón

Bonne nuit, Voir si vous m'avez élaguée appor

07-12-2015 14:17

Zugna Marino Zugna Marino

Buon giorno a tutti, ad un primo momento, non ess

25-11-2012 20:32

Bometon Javier Bometon Javier

Ascomas cupoliformes abiertos lateralmente, himeni

25-01-2026 16:08

Malcolm  Greaves Malcolm Greaves

This Geoglossum had spores mostly 70-80 (87) with

27-01-2026 11:43

Malcolm  Greaves Malcolm Greaves

Is anyone with experience of DNA testing able to t

26-01-2026 11:49

Margot en Geert Vullings

We found this possible anamorph on a dead Cytisus

25-01-2026 23:23

Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

18-01-2026 12:24

Josep Torres Josep Torres

Hello.An anamorph located on the surface of a thin

23-01-2026 21:50

Cameron DK

I am looking for this please publication. is anyon

10-01-2026 20:00

Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

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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.

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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