24-03-2024 08:27
Thierry Blondelle
HiOn Hedera helix fallen branchEcological habitat:
26-04-2024 10:07
Mathias Hass
Hello, Does anyone know what this is? Found on J
24-04-2024 21:54
éric ROMERO
Bonjour, J'ai trouvé ce Lasiobolus sur laissées
23-04-2024 15:18
Lothar Krieglsteiner
... but likely a basidiomycete. I hope it is o.k.
23-04-2024 13:17
Edouard Evangelisti
Bonjour à tous, Je viens de récolter ce que je
23-04-2024 21:49
Ethan CrensonHello all, A friend recently found this orange as
22-04-2024 11:52
Zuzana Sochorová (Egertová)
Hello,I made a loan of a collection of Microstoma
11-01-2022 16:36
Jason Karakehian
Hi does anyone have a digital copy of Raitviir A (
22-04-2024 20:38
Miguel Ángel Ribes
Good afternoon.Does anyone know this anamorph?It g
Apothecia ca 0.3-0.4 mm diameter; sessile; with cream-coloured hymenium. Excipulum textura angularis. Margin with yellowish hairs(?), ca 40-50 µm long, forming an aggregated mass in which individual components are very difficult to distinguish.
Asci 35-40(-45) x 4-5 µm, 8-spored, with croziers, tips staining blue in IKI.
Paraphyses apparently sparse, narrowly cylindrical, ca 1 µm wide.
Spores 10-14 x 1.5-2 µm, with medium-sized oil bodies (ca 30-40% of spore volume).
I assume it belongs to the Hyaloscyphaceae but I haven't managed to put a name to it. I'd be grateful for any help.
Merci
Marcus
Perhaps this is Psilachum lanceolato-paraphysatum. In that species the medulla often reacts blue in IKI, also the anchoring hyphae.
The apos like to grow near a black ?coelomycete, maybe also in your case.
Zotto
Thanks Zotto.
In many respects my specimen does resemble the collections of Psilachnum lanceolato-paraphysatum that you have described/illustrated in your files. I see that you have images of a collection by Piotr Perz in which the hairs are covered in gel, which seems also to be the case in my specimen.
I'll test the reaction of the medulla to IKI. I'll also have another look at the paraphyses - I think in some cases they were distinctly more lanceolate than the one shown in my photo.
Different descriptions of this species seem to vary in some characters. For example, Raitviir says that asci arise from simple septa whereas other descriptions mention croziers. Spore dimensions also seem to be rather variable.
Marcus
actually Raitviir was in error in several cases. I remember Incrupila aspidii which always had croziers when I saw it.
Zotto
I've been having another look at this specimen.
I was mistaken about the paraphyses. They are lanceolate (not cylindrical), tapered to an acute apex, ca 3 µm wide, exceeding the asci by about 10 µm.
Hairs seem to be narrowly cylindrical, ca 2-3 µm wide, but are very difficult to discern because they are aggregated in a mass.
The medulla appears to be blue in IKI (though I struggled to cut a decent section).
The apothecia are closely associated with a sterile coelomycete/hyphomycete, with brown septate setae, 120-220 µm long.
So Psilachnum lanceolato-paraphysatum seems to be a distinct possibility.
Marcus
Thank you!
Marcus