04-04-2020 19:03
Andgelo MombertBonsoir, Sur branche morte aérienne de Crataegus
09-04-2020 19:51
Miguel Ángel Ribes
Good evening guysI found this small apos (1,5-2 mm
05-04-2020 18:59
Andgelo MombertBonsoir, Un sympathique pyréno observé sur Vibu
07-04-2020 11:03
Malcolm Greaves
Has anyone got a key to Pososordaria or informatio
07-04-2020 23:11
BERNARD CLESSE
Bonsoir à toutes et à tous,Trouvé hier ce que j
08-04-2020 20:19
Enrique Rubio
Hi to everyoneThis fungus forms very small ascomat
07-04-2020 17:56
Mirek GrycHello allCan anyone help me identify this unknown
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
