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20-09-2020 15:02

Chris Yeates Chris Yeates

Bonjour tous A few days ago I collected a piece o

18-09-2020 22:38

Castillo Joseba Castillo Joseba

De esta mañana  en corteza de fagusHe visto unos

19-09-2020 11:04

Angel Pintos Angel Pintos

Hello,anybody has?Pseudoguignardia scirpi Gutner,

18-09-2020 22:49

Marek Capoun Marek Capoun

Hello everybody,I need help with the determination

01-03-2017 17:18

Enrique Rubio Enrique Rubio

Hi to everybodyCould you help me with a pdf copy o

18-09-2020 12:45

Joaquin Martin

Hi,A colleague gave me this Pyrenomycete on Fagus

18-09-2020 09:28

Viktorie Halasu Viktorie Halasu

Hello,this looks like Lophodermium petiolicolum, e

18-09-2020 10:15

Zugna Marino Zugna Marino

Buon giorno a tutti i colleghi.la specie che, a pr

18-09-2020 10:14

Zugna Marino Zugna Marino

Buon giorno a tutti i colleghi.la specie che, a pr

17-09-2020 09:19

Joop van der Lee Joop van der Lee

Found P. oedipus on horse dung yesterday.A perfect

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Orbilia ?dryadum
Chris Yeates, 20-09-2020 15:02
Chris Yeates
Bonjour tous

A few days ago I collected a piece of well rotted Quercus wood, which had several fungi on its damp underside. The portion retained was much smaller than shown in the first photo.

Species included were abundant growth of a Tomentella species with globose spinose spores, also Melanomma pulvis-pyrius, the anamorph of Chaetosphaeria pulviscula, and Orbilia leucostigma (as now understood).

There was, in addition, a different Orbilia species, which had small cylindrical spores and I was sure I had never seen it before. Reference to the monograph led me to Orbilia dryadum, my one doubt was the colour of the apothecia. Two apothecia were checked and, based on the identical spores were clearly the same species, but one had clavate to sub-capitate paraphyses, while the other had (mostly) more typical capitate ones. The spores measured 3.1-3.6 x 1.1-1.4 (1.6)µm - Qe=2.9. Annoyingly, I did not photograph some fusoid/ellipsoid spores (probably conidia) which were present in the slide preparation as I thought they were a contaminant! I should have known better and will make an attempt to find more, though the material is sparse.

As I say all this has led me to Orbilia dryadum - I would welcome advice.

Amitiés, Chris
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Hans-Otto Baral, 20-09-2020 16:47
Hans-Otto Baral
Re : Orbilia ?dryadum
Yes, this must be O. dryadum. The conidia you saw were septate? The apo colour is good I think, usually paler, though.
Chris Yeates, 20-09-2020 17:29
Chris Yeates
Re : Orbilia ?dryadum
As ever "vielen Dank" Zotto. This appears to be the 2nd UK / 1st English record; and I was only collecting in that area because I had time to kill before catching a train ;-)

My first success with the superb Monograph.

Chris

PS - yes the conidia were hyaline and septate