18-10-2019 12:41
Alan Braddock
Is there a definitive article on the net concernin
17-10-2019 17:24
Gilbert MOYNEBonjour, Deuxième récolte de mardi 15/10/2019 q
01-01-2015 17:06
Alessio Pierotti
Happy new year to all friends of the forumSomeone
15-10-2019 21:47
Stephen Mifsud
Hi, my eye fell on a dead stalk of a herbaceous pl
16-10-2019 00:36
BERNARD CLESSE
Sur feuilles pourries de ronce.Bernard
14-10-2019 20:00
Michael HaldemanThis collection is from bark at the base of a dead
15-10-2019 05:23
Yulia LytvynenkoDear friends.Looking for a copy of the following w
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
