11-02-2026 22:15
William Slosse
Today, February 11, 2026, we found the following R
11-02-2026 19:28
Lothar Krieglsteiner
on small deciduous twig on the ground in forest wi
25-04-2025 17:24
Stefan BlaserHi everybody, This collection was collected by JÃ
10-02-2026 17:42
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me donner
10-02-2026 18:54
Erik Van DijkDoes anyone has an idea what fungus species this m
09-02-2026 20:10
Lothar Krieglsteiner
The first 6 tables show surely one species with 2
09-02-2026 14:46
Anna KlosGoedemiddag, Op donderdag 5 februari vonden we ti
02-02-2026 21:46
Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
Can anyone help me with this:
On the inside of the bark of Salix .
Perithecia soft black sphaerical with short necks. 0,15 mm wide, superficial, closely packed in groups of 5-6, several of these groups 3-4 cm apart. Ascospores hyaline, 50-60*2 µm, with high oil content, becoming at least 5-septate , maybe more. Asci 75*9 µm, IKL negative. Paraphyses: 100*7-8 µm, septate. No anamorf to be found.
Thank you,
Greet Â
Interesting collection. Are the perithecia stromatic? If so, you could consider the genus Sillia, e.g. S. ferruginea, which is described in Munk 1957 (another reference, see tab "Artikelen" at https://www.verspreidingsatlas.nl/1147010#). A generic description is given in sleutel (key) A9: see
http://www.mycologen.nl/Ascosleutel/downloads/SleutelA13_v3-1.pdf
Eduard
I suggest you consider the genus Ophioceras, primarily known from aquatic habitats but including some terrestrial species. The apical apparatus of asci is indeed J- but stains with blue ink or Congo red.
A good, if not comprehensive account was given by Shearer et al., Mycologia 91: 145-156. Should be available on Cyberliber.
good luck,
Jacques
Thanks for your advice and help,
@Eduard: I started out in the first place with the key you suggested (great key) and couldn't find a match.There is no stroma, only a dark patch surrounding the peritecia, this being wood stained black.
 @Jacques: I made a new picture where I stained the asci with Congo-red. The coloring isn't much but I think it could be considered as a positive reaction. I read the article you suggested but couldn't find a species that matches my measurements. So it'll stay a Ophioceras sp.
Thanks,
Greet
