Accès membres

Mot de passe perdu? S'inscrire

17-04-2009 22:32

Peziza merdae
Yannick Mourgues Yannick Mourgues

Bonsoir. Voici une récolte de Peziza merdae qui

17-04-2009 18:42

Asco on Umbelliferae stems
Enrique Rubio Enrique Rubio

Je vous autrefois prie une aide pour cet asco (0.5

16-04-2009 23:16

Peziza saniosa
Miguel Ãngel Ribes Miguel Ángel Ribes

Hi, good night Could you confirm this Peziza li

16-04-2009 23:05

Ostropales
Gernot Friebes

Hello, this time I found an Ostropales I can no

15-04-2009 21:15

Cercophora-Inmersiella
Enrique Rubio Enrique Rubio

Cher tous: J'ai trouvé sur bois tres degradée c

15-04-2009 15:07

petit asco couleur "groseille"
bernard BOUSQUET

Bonjour, Je viens de récolter un petit asco de

15-04-2009 11:37

PATTE A PAPIER
Alain Delannoy

Bonjour, Ayant repris mes observations sur les

14-04-2009 22:10

Lamprospora vs. Octospora
NC NC

hello forum, i am in search of informations, wh

14-04-2009 16:25

Diatrypaceae
Gernot Friebes

Hello, who can help me with this pyrenomycet? I

12-04-2009 11:11

Lachnum
Jean Pierre Dechaume Jean Pierre Dechaume

Bonjour à tous, Si je peux me permettre, je soll

« < 1485 1486 1487 1488 1489 > »
Pale 4-spored pyrenomycete
Eduard Osieck, 16-07-2015 22:36
On a dead Arctium (= herbaceous) stem pale round ascomata with 4-spored asci with a long stipe. Spores are one-celled, rather small (7-9 x 5-7 um), brown with a germ pore at each end. Ascomata become dark when spores become ripe. Ascoma wall presumably a textura epidermoidea.

I have no idea what it is. It does not concern 4-spored genera like Boothiella (spore length > 10 um) and Arxiomyces (ascomata dark and beaked).


Does anybody has a suggestion what this could be?


Thanks in advance, Eduard

  • message #36989
  • message #36989
  • message #36989
  • message #36989
Eduard Osieck, 14-09-2015 22:55
Re : Pale 4-spored pyrenomycete
Further study has revealed that the collection best matches the characteristics of the genus Pseudallescheria (see Guarro 2012, Soil Ascomycetes): cleistothecium, textura epidermoidea, brown one-celled spores with a germ pore at each end. However, this genus is only known with 8-spored asci. The main question is what is the taxonomic significance of the spore number/ ascus? Does it depend on environmental conditions? 
  • message #37953
Eduard Osieck, 27-12-2021 12:10
Re : Pale 4-spored pyrenomycete
Finally this fungus has got a scientific name thanks to two German collections and the Westerdijk Institute (former CBS): Paramicrothecium sambuci.


(sheet 1329, pages 262-263).