15-01-2020 00:11
William Slosse
Hallo Forum,I recently found a curious ascomycetes
18-01-2020 19:03
BERNARD CLESSE
Bonsoir à toutes et tous,Une idée pour cet asco
18-01-2020 08:13
Juuso ÄikäsThese were growing on the underside of a piece of
17-01-2020 23:49
Ethan CrensonHello again, I found this in a NYC park on very w
18-01-2020 12:40
Calzada Augusto
Hola amigos:Estoy estudiando una Gyalidea multispo
17-01-2020 22:42
Ethan CrensonHello all, This is from New York, growing on deco
16-01-2020 22:21
BERNARD CLESSE
Bonsoir à toutes et tous,J'ai trouvé récemment,
02-01-2020 11:40
Robin IsakssonFound this one i with moss in sand 20 meters from
17-01-2020 07:47
Alain DelannoyBonjour,Sur bois dur et sec de Fagus ( buche)Chair
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
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
