20-04-2026 22:00
Malcolm Greaves
These pale yellow, hairy ascos were growing on cul
19-04-2026 21:23
Steve ClementsBonjour, I found this anamorphic fungus on old pl
19-04-2026 20:46
Steve Clements1 mm diameter approx spherical conidiophores on pl
12-04-2026 17:56
Hardware Tony
Found on dead stems in February earlier this year
17-04-2026 19:16
Enrique Rubio
Hi to everybodyI would appreciate any assistance r
14-04-2026 05:32
Ethan CrensonHi all, A few weeks back a friend pointed out som
17-04-2026 15:14
Bruno Coué
Bonjour.Récoltes du 16/04/2026, sur feuilles mort
12-04-2026 15:52
Gernot FriebesHi,I'm looking for help with this anamorph collect
14-04-2026 21:52
Gernot FriebesHi,found on dead leaves of Carex elata. Conidia: 4
16-04-2026 22:09
Buckwheat PeteHello, I'd like to ask about this older specimen:
Eutypa ?
Petra Eimann,
29-12-2019 15:54
Hello together, need help. Found 21.12.2019 in a mixed deciduous forest. Growing place was a branch of Sambucus nigra. We think it might be a Eutypa but not sure. Average spore size 4.97 x 1.47 Q=3.42, IKI Reaction not sure, if then little. Any ideas what it might be?
Jacques Fournier,
29-12-2019 18:28
Re : Eutypa ?
Dear Petra,
the identification of Diatrypaceae is most often challenging and requires the accurate observation of several characters, not only ascospores.
A common species on Sambucus is Peroneutypa scoparia, and ascospore dimensions fit fairly well. However the ascus shape on your photos is not typical for this species.
You need information on the ostioles and stromatal configuration. For the latter purpose a vertical section as you did would hav been much more informative if you had used a sharp razor blade. It is important to assess whether ascomata are widespread in a common stroma with separately emergent ostioles (Eutypa or Diatrype) or in small groups with convergent ostioles (Eutypella or Peroneutypa)
The apical ring of P. scoparia is relatively conspicuous for the genus and must be observed in Melzer's reagent after a 15 s pre-treatment in 3% KOH.
If you encounter problems with the vocabulary and the delimitation of genera, I suggest you to consult Rappaz' article (1987).-Taxonomie et nomenclature des Diatrypacées à asques octosporés. Mycologia Helvetica vol 2, n° 3, p. 285-648.
Good luck,
Jacques
Petra Eimann,
30-12-2019 00:22
Re : Eutypa ?
thank you very much Jacques, we will try again. Petra