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13-11-2013 14:20

Joop van der Lee Joop van der Lee

Found on horse dung also found on sheep dung in th

11-11-2013 19:04

Joop van der Lee Joop van der Lee

Found on horse dung (wild fjord horses).Fruitbody

11-11-2013 19:16

Piet BORMANS Piet BORMANS

Hi,  A few days ago I found this discomycete on a

12-11-2013 16:56

Malcolm  Greaves Malcolm Greaves

This group of Neobulgaria look alikes were growing

12-11-2013 16:44

Yannick Mourgues Yannick Mourgues

Bonjour à tous.En dehors de Eutypa petrakii var.

12-11-2013 15:12

Hans-Otto Baral Hans-Otto Baral

Hidoes anybody have this article as pdf?Webster J,

11-11-2013 12:57

Joop van der Lee Joop van der Lee

Found on horse dung, no photo of the fruitbody.Asc

05-11-2013 20:47

Malcolm  Greaves Malcolm Greaves

I found this specimen on a very rotten branch in a

28-10-2013 09:16

Stefan Blaser

Hello everybody I hope someone can help me identi

10-11-2013 21:40

Ralph Vandiest Ralph Vandiest

Hello,I found this one on rubus. It measures 1mm

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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