
07-06-2025 15:39

A friend sent me a few Betula seeds with tiny blac

08-06-2025 18:03
Bonjour à tous, Une récolte alpestre discrète

08-06-2025 14:55

Ascomata only ca. 1 mm, erumpent on very thin Sali

04-06-2025 15:10
Stefan JakobssonHi forum, On a herbaceous stem, possibly Aegopodi

03-06-2025 20:52
Stefan BlaserHello everybody, I didn't get anywhere with this

20-05-2025 22:15

I found this ascomycete at the base of a dead fern
Spores:
17.5-26.2 x 6.3-8.9µm
Me 21.7 x 7.9µm
Q 2.1-3.2
Qe 2.8
N=24
Hyaline, occasionally allantoid, rounded ends. They do not appear to bud.
(3)7(8) septate, with multiple longitudinal septa.
I have tried to key it out using Jaklitsch, W. M., & Voglmayr, H. (2014). "Persistent hamathecial threads in the Nectriaceae, Hypocreales: Thyronectria revisited and re-instated" but without much luck.
Any help would be appreciated.
Thank you in advance.
Ethan

it's from the group around T. zanthoxyli, but which one...
- Not T. rhodochlora, too narrow spores.
- T. zanthoxyli should have perithecia clearly immersed in stroma and much more curved spores (my Czech coll. attached), although there are also exceptions and the coll. published in https://doi.org/10.1007/s11557-021-01763-z looks much like yours in this aspect.
- T. lonicerae and T. virens I haven't seen myself. T. lonicerae differs macroscopically, as far as one could rely on this feature, also the spores have more narrow poles like T. berolinensis.
So I would say either T. zanthoxyli with atypically straight spores, or T. virens with atypically long spores.
Viktorie