20-08-2025 19:04
Ethan CrensonHello, This asco was found on the same wood as my
21-08-2025 02:18
Stefan JakobssonOn a necrotic section of a living Tilia cordata I
19-08-2025 20:58
Ethan CrensonHi all, Here is what I believe to be a Hymenoscyp
12-08-2025 19:44
Enrique Rubio
Could someone send me a pdf copy of this article?S
18-08-2025 15:17
Lothar Krieglsteiner
... on 6.7.25 in a subarctic mire near a small lak
18-08-2025 15:07
Lothar Krieglsteiner
.. 20.7.25, in subarctic habital. The liverwort i
19-08-2025 16:27
Paul CannonHello all I have spent some time trying to work o
18-08-2025 22:59
Yanick BOULANGERBonsoirVoici un asco récolté le 08/08/2025Comme
Good eveningAnother find I'm looking for help with:
Place of discovery: dead, damp, greasy, partially debarked hardwood branch with a broad strip of Exidia effusa, hidden under partially protruding bark, on the round NSG Auenwald near Deuz
MTB: 5014,434 Date of discovery: 02.03.2025
Fruiting bodies in rows and small groups with a total of 9 specimens, bowl-shaped round, sessile, with a clearly recognizable edge that protrudes above the hymenium; colorless to milky white, very soft, discoloring to yellowish-hyaline with age, completely glabrous;
Ø up to 640µm, h up to 200µm;
No membranous covering layer is recognizable on the hymenium and paraphyses and asci are not attached to each other;
Practically no asci were to be found in the first fruiting body (although externally overripe), while the second fruiting body showed at least some asci that appeared quite ripe. Free spores were not to be found.
Asci were cylindrical to clavat, clearly truncate in profile, filled with 8 spores each; details of the base not visible at first sight;
28.5x3.0 - 27.5x2.4
Spores, only observed and measured in the ascus, broadly oval to roundish; practically not visible in water, later stained with Congo red (NH3) the spore outlines became visible; measured in Congo red and in the ascus:
2,2x1,4
2,3x1,5
2,3x1,7
Paraphyses cylindrical, 3-5 septate, filled with refractive light;
Can someone please tell me if my suspicion applies to orbilia frangulae?
Many thanks and best regards
Harald
Ich hab´s heute noch einmal versucht - anbei sind die Ergebnisse.
Die Sporen sind elliptisch mit Sporenkörper od. LB von 0,65µm Ø an einem Pol.
Die Maße in Wasser im Ascus: 2,3x1,6 µm aus 5 Messungen.
Laut Schlüssel lande ich damit bei Orbilia fissilis, wobei die Abgrenzung zu O. Eucalypti mit subglobosen Sporen wegen der Sporenmaße im Ascus unsicher ist.
Viele Grüße
Harald
Nachdem ich klarere Bilder von den Sporen hatte, bin ich den Schlüssel und Teile der Monographien noch einmal durchgegangen und war ebenfalls bei der Frage nach O. cejpii gelandet.
Die Fruchtkörper vom Fund 3e (Titisee) sehen in Form und Farbe meinem Fund sehr ähnlich. Auch die Paraphysen können offensichtlich weniger stark kopfig sein.
„Paraphyses slightly or often medium to (very) strongly (clavate-)capitate, ..." dürfte doch die Interpretation zulassen.
Ich versuche in einigen Tagen noch einmal freie Sporen zu finden. Bei Erfolg melde ich mich.
Anbei noch einige Sporenbilder – anders aufgearbeitet.
Viele Grüße
Harald
