Podospora excentrica - Forum ASCOFrance

12-06-2026 14:50

Mollisia revincta (?)

François Freléchoux

Bonjour, Voici la brève description d'une Mollis

10-06-2026 21:16

Ascomycète stipité sp. sur Filipendula ulmaria

François Freléchoux

Bonsoir,Le dernier du jour, en attendant votre avi

11-06-2026 16:24

Orbilia

Ethan Crenson

Hi all, Recently, a friend found this Orbilia in

11-06-2026 19:01

Spinellus-like fungus on Scathophaga stercoraria

William Slosse

Hello all,In an attempt to make a culture of a sus

11-06-2026 19:03

IMPORTANT >> MAINTENANCE 15-06

Nicolas VAN VOOREN

Chers membres d'Ascofrance,Le site sera placé en

10-06-2026 23:08

Mollisia nervicola ?

éric ROMERO

Bonjour tous, Je vous propose un Mollisia trouvé

09-06-2026 18:32

Vibrisseaceae(?) sur phragmites

Camille Mertens

Sur morceau de roseau immergé 0,5 - 0,7 mm de dia

10-06-2026 12:54

A dematiaceous hyphomycete on Filipendula

Steve Clements

Bonjour encore, Pouvez-vous m'aider, s'il vous pl

10-06-2026 21:07

Pyrénomycète ? sur Gentiana lutea

François Freléchoux

Toutes les tiges de gentianes jaunes de l'an pass�

10-06-2026 13:41

Ascomycète sp. sur Gentiana lutea

François Freléchoux

Bonjour à nouveau, Voici une trouvaille d'hier.

Podospora excentrica

Chris Yeates, 08-10-2021 17:19

Bonjour tous

A recent collection of dung from mountain hare Lepus timidus was seen to have a perithecium of this species even before incubation commenced. Examination with Nomarski DIC gave an opportunity to look for the gelatinous appendages normally invisible without indian ink (which was later used to double-check the identification). The perithecium only contained asci at various stages of immaturity, some old collapsed spores and numerous fully mature ones no longer in their asci.

So these images show the latter, as well as a couple of submature spores which show the asymmetry well. I thought fellow copromycologists might be interested. As you can see with DIC the apical appendage shows quite well as a sort of gel sheath, with a definite margin - hard to see in indian ink mounts which are of necessity more diffuse. I was not able to distinguish the basal appendages with this technique, perhaps because the spores were not fresh out of the asci.

Another feature I noticed - though forgot to photograph - was that the pedicels were consistently of a distinctive shape. Unlike the simply rounded club-like pedicels one generally sees in Podospora these had a rather "pinched out" apex, a little like a teat.

Amitiés, Chris

Michel Delpont, 08-10-2021 18:45

Re : Podospora excentrica

Bonsoir Chris!

Indeed the shape of the spores and their pedicels of your harvest make one think of exentrica. Have you been able to observe the hairs at the top of the perithecium and measure the size of the spores?

Amitiés.

Michel.

Chris Yeates, 08-10-2021 19:26

Re : Podospora excentrica

Bonsoir Michel

Yes tufts of hairs like these, and some much longer, spore size 33.2-38 x 18.2-20.5µm. Appendages also checked in indian ink.

Amitiés, Chris

Michel Delpont, 08-10-2021 20:15

Re : Podospora excentrica

The size of the spores is in the upper range (especially the width), the hairs as well as the slightly exentricated germ pore lead to P.exentrica.

Michel.

Chris Yeates, 08-10-2021 20:36

Re : Podospora excentrica

Thanks

Lundqvist in Nordic Sordariaceae gives much wider spore measurements (18-24µm). I've noticed on other occasions that his measurements can differ from other authors. Doveri gives a Qe of 1.89, mine was 1.9; so yes I'm happy with the identification.

Chris

Norbert Heine, 08-10-2021 23:12

Re : Podospora excentrica

Great Found, Chris!

In my opinion this is a rare species. You should compare with this nice documentation.

https://www.pilzforum.eu/board/thread/52488-podospora-excentrica/

Norbert

Accès membres

Forum AscoFrance