11-05-2026 12:32
Bernard CLESSE
Pourriez-vous m'aider à identifier cette héloti
13-05-2026 15:26
François Freléchoux
Bonjour,Voici une récolte faite il y a quelques j
12-05-2026 15:41
Nicolas VAN VOOREN
Dear Ascolovers, especially interested in Pezizale
13-05-2026 12:05
Thierry Blondelle
Bonjour à tous,J'aimerais avoir confirmation de c
10-05-2026 23:17
Andreas Gminder
Hello,today we found in a moist steep decidous for
28-04-2026 20:07
Lothar Krieglsteiner
... on twig in the air at standing Ceratonia siliq
27-04-2026 20:52
Lothar Krieglsteiner
Found on hanging tiwg of Olea europaea in dried-ou
11-05-2026 20:22
Lothar Krieglsteiner
on attached twig of standing Ficus caricaquite uns
29-04-2026 10:44
Lothar Krieglsteiner
growing at moist, drying-out soil at the side of a
Bonsoir, Je ne sais pas trop si c'est opportun sur ce forum dédié aux ascos de vous demander votre avis à propos de ce que je crois être un hyphomycète (le cas échéant n'hésiter pas à me le dire).
Sur branchette sèche de tilia tombée, des périthèces (corrigez le terme si ce n'est pas cela) de 0.5 à 1.3 mm de diamètre, noirs à la coupe me donnant des conidies de 2 tailles : petites et grandes (jusqu'à 80µ). Je l'appellerais bien Corynespora olivacea. Votre avis ?
Alain
Alain
amitiés, :)
I think this paper will help you: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5473648/
Best wishes,
Gernot
Hi !
You resurrected an old message from 2007. I was taking my first steps in mycology, nostalgia...
Since then I have found it and the authors of this masterful paper have precisely sequenced and determined this Helminthosporium (ex. Corynespora). : http://www.ascofrance.com/search_harvest/4545
You can compare but be careful several species exist and determine them without more information than a morphological observation is risky.
All the best,
Alain
Yes, I resurrected your old message and it turned out to be quite helpful! I am not really 100% certain, but I think my collection is H. oligosporum. The substrate is Tilia, which is consistent with both H. oligosporum and H. tiliae. But comparing the two species, as described in Voglmayr and Jaklitsch, the differences that I am able to observe are the somewhat smaller conidiospores with fewer septa, and the stated range (widespread in Europe and North America for H. oligosporum, Europe only for H. tiliae). But as you mention there is a risk of an overconfident identification.
My data in case you are interested:
Conidia: (52-)59-105(-114) x 14-18µm; tapering at the distal end to 6-11µm; scar at the base of the conidia 4-8µm; (2-)4-12 septa.
Regards,
Ethan