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16-06-2019 19:17

Nicolas VAN VOOREN Nicolas VAN VOOREN

On dead stem of Veratrum, numerous dot-like specim

16-06-2019 11:54

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.Here is a Hymenoscyphus species growing on b

16-06-2019 12:07

Riet van Oosten Riet van Oosten

Hello, Found by Theo Westra, 13-06-2019 (The Neth

14-06-2019 15:32

Malcolm  Greaves Malcolm Greaves

A small group of Perithecia on rotten (salix?) woo

14-06-2019 09:40

Per Marstad Per Marstad

I have found this in Norway, on hardwood, laying o

14-06-2019 06:40

Django Grootmyers

What is this parasite of Cantharellus minor? Found

11-06-2019 01:49

Valencia Lopez Francisco Javier

Hola amigos...Adjunto fotos de unas supuestas Para

11-06-2019 00:32

Elisabeth Stöckli

Bonsoir, Sur feuilles de ronce (Rubus/roncier à

11-06-2019 16:20

Garcia Susana

Hola, He recolectado este asco sobre estiercol, c

12-06-2019 22:42

Ethan Crenson

Hello all, A friend noticed these tiny fruiting b

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Black acervuli with strange brown "phragmo"conidia
Edvin Johannesen, 08-05-2019 17:28
Edvin JohannesenThese small, black cushions were collected on a thin twig (presumabley deciduous). Very strange conidia appeared under the microscope (in KOH). The septa appear to be wavy, partly transversal, partly longitudinal, so possibly muriform. Some have a hyaline, apical appendage/pedicel-like structure at one end. In phase contrast a slimy (gelatinous) matrix becomes evident. Are genera like Coryneum or Seiridium possibilities or am I on the wrong track? Suggestions appreciated. Thanks!
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Lothar Krieglsteiner, 08-05-2019 17:43
Lothar Krieglsteiner
Re : Black acervuli with strange brown "phragmo"conidia

Hello Edvin,


whatever fungus this could be - the "conidia" you show appear as strongly collapsed to me - likely due to age.


They could also be ascospores with the asci already faded (?).


Yours, Lothar

Edvin Johannesen, 08-05-2019 17:54
Edvin Johannesen
Re : Black acervuli with strange brown "phragmo"conidia
Thanks, Lothar.  In fact, it was collected a months ago and it was studied without drying, but of course, the fungus may have "wintered".  It looks pretty fresh, though.  I doubt they are ascospores, since several have the appendage (although I guess that doesn't totally rule out ascospores).