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12-07-2015 11:11

Capitotricha bicolor ?????
Castillo Joseba Castillo Joseba

En madera de Rosacea (melocotonero)Mer parecio por

12-07-2015 21:45

Flattened linear pseudothecia on stems of Sedum rosea
Marcus Yeo

This fungus was growing on dead stems of Sedum (Rh

11-07-2015 16:54

Urceolella on Epilobium leaves
Marja Pennanen

Hello,once again Raitviirs study gave me no answer

12-07-2015 00:05

Peziza paludicola or something else?
Nedim Jukic Nedim Jukic

This one from the same locality as the previous on

11-07-2015 23:33

Olive Peziza
Nedim Jukic Nedim Jukic

Found this on deciduous wood mostly covered in mo

07-07-2015 13:23

Byssolophis?
Gernot Friebes

Hi, I've received photos and descriptions of two

10-07-2015 10:38

Cistella on anemone leaves
Marja Pennanen

Hello forum,these are up to 0,4 mm wide.The spores

09-07-2015 18:28

Bryoscyphus on liverworts in Norway
Lothar Krieglsteiner Lothar Krieglsteiner

... in the area of the Dovrefjell National Park, m

09-07-2015 20:04

Psilopezia?
Carmel Sammut

Small specimens (5-7mm) in diameter on twigs in hu

09-07-2015 18:37

Ciboria latipes on Rubus chamaemorus - with deep blue porus with Barals solution
Lothar Krieglsteiner Lothar Krieglsteiner

In the area of Telemark (southern Norway), at the

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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
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  • message #36989
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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).