11-09-2025 16:57
Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
13-09-2025 14:10
Wim de GrootWe found this hymenoscyphus on rubus fruticulosis.
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
10-09-2025 23:53
Marcel Heyligen
Found on Robinia pseudoacasia together with Diapor
10-09-2025 17:18
Blasco Rafael
Hola, encontre este estiercol de vaca estos apotec
02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903
I hope that anyone can help me with a tiny pyrenomycete with rather special and therefore characteristical spores. It was found on dead hanging branches of Carpinus betulus.
Description: Perithecia ovoid, flattened with a nonbeaked ostiolar opening. About 0.5 x 0.2 mm. Perithecia are immersed in small groups below the thin cortex and only the ostiolar opening is sometimes just visible. A common stroma has not been observed.
Microscopy: Asci 170-190 x 15-18 micrometer. An Apical apparatus could not be observed (not in water nor Kongo nor Iodine nor lactophenolblue). The spores are presumably muriform consisting of 8(?) cells (see photos). The apical cells are hyaline, while the inner cells are somewhat brownish with big greenish oildrops in each. Size is about 37-45 x 13-16 micrometers. Paraphyses are filiform with a diameter of only about 2 micrometers.
Any clue is very welcome.
Thank you very much
Stefan
ich denke es könnte Stilbospora macrosperma sein.
Die Sporenmasse stimmen mit deinen Angaben überein und sind 3- Fach septiert.
Was meinst du dazu? Hast du noch ein Foto vom Pilz?
Gruss Ueli Graf
Das denke ich nicht, es sei denn von Stilbospora gibt es eine Hauptfruchtform die so aussieht?? Aber Stilbospora ist ja eine Nebenfruchtform mit Konidienbildung, währenddem ich ganz klar Ascosporen habe. Zudem sind die Sporen bei mir so weit ich das beurteilen kann sowohl Längs- als auch querseptiert.
Der Pilz ist so klein, dass ich mit meinen fotografischen Möglichkeiten kaum ein aussagekräftiges Bild machen kann...
Grüsse
Stefan
Perhaps you should look towards bitunicate ascomycetes from freshwater. There are a lot of genus and some of ones have bicolor ascospores.
Alain
But is it really bitunicate ?
Your photos are excellent! I wonder if your fungus could be Fenestella bipapillata (Tul.) Sacc. A description and illustration can be found in Berlese Vol II p.76 Tab CVIII. The species probably does not represent a Fenestella in the modern sense but otherwise it seems to a good match.
M.E. Barr (Mycotaxon 18: 149-157, 1983) describes a N.Am. species, Dictyoporthe canadensis, that is similar but with smaller spores. Perhaps Fenestella bipapillata is better accomodated in Dictyoporthe.
I hope you find this information useful.
Adrian Carter
Congratulations to you, it's a nice collection.
Alain
OestZPilz-6-0045-0049-0001.pdfDictyoporthe bipapillata fits very well. Thanks for your help!
ja da habe ich auch wieder etwas gelernt bei diesem Interesanten Ascomyceten.
Gruss ueli
Thanks
Hiran
ariyawansa44@gmail.com
regards,
björn
I was searching for the type so if this tally with it hmmmm great
I look forward to hearing from you soon
Thanks
Regards
Hiran