27-02-2026 16:17
Mathias Hass
Hi, Found this on Betula, rather fresh fallen twi
28-02-2026 14:43
Alain GARDIENNET
A new refrence desired :Svanidze, T.V. (1984) Novy
01-03-2026 18:02
Francois Guay
I found this mystery Helotiales on an incubated le
01-03-2026 14:10
Antonio Couceiro
Hola, me gustaria conocer opiniones sobre este tem
01-03-2026 18:46
Robin Isaksson
Hi! This species i se from time to time in the
01-03-2026 08:55
Michel Hairaud
Bonjour , Je souhaiterais recevoir cet article :Â
01-03-2026 15:31
Csaba Németh
Hello!I found these apothecia on Homalothecium lue
Sydowiella or Melanconis teleomorph on Betula
Mathias Hass,
27-02-2026 16:17
Hi,
Found this on Betula, rather fresh fallen twig. found February 24, Asserbo, Denmark
Groups of black ostioles protruding through a whitish disc.
Asci: 102-124 x 13,6 - 18,7 my, with prominent apical pore, IKI-.
Ascospores: 20,2 (16,8-25,0) x 8,9(7,8-11,5) my, Q=2,23 (2,05-2,69), n=20. 1-septate, hyaline with oily content.
Anamorph not seen.
I can't figure out whether this is Melanconis stilbostoma or Sydowiella ambigua ...also I'm uncertain what the difference is between them.
... any help appreciated.
Kind regards Mathias
Mathias Hass,
02-03-2026 08:11
Re : Sydowiella or Melanconis teleomorph on Betula
I just realized that it cannot be Sydowiella ambigua, because the peritecia are stromatic and immersed in the substrate, so it must be the common Melanconis stilbostoma. Here is the description of S. ambigua by Munk from "Danish pyrenomycetes" 1957.
