23-10-2024 17:27
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Hyalopeziza on Rhamnus
Enrique Rubio,
23-10-2024 17:27
These tiny apothecia (100-200 µm) were growing on wood of still attached branches of Rhamnus alpina at 1700 m altitude. I had not studied them until I was able to detect them with the bino three weeks after I had collected them.
Erumpent from the wood, with an olive-grey hymenium, asci without croziers, IKI-negative and spores without septa with a relatively high lipid content. The excipular hairs do not have solidifications nor septa, nor dextrinoid, but they do have walls up to 1 µm with a continuous lumen. Despite their conditions, the apos appear to have tolerated desiccation perfectly well.
The material agrees fairly well, except in some respects, with Raschle's description of Hyalopeziza nectrioidea, but less well with those of some other authors.What do you think?
Many thanks in advance
Hans-Otto Baral,
27-10-2024 07:52
Re : Hyalopeziza on Rhamnus
Dear Enrique
I can only agree, it is not H. nectrioidea but possibly close. The high lipid content in the spores I did not see in that species. But I was astonished about my collection with brown hairs HB 9906 which I first took for an Encoeliopsis but which was genetically clearly H. nectrioidea CBS 597.77 from Aletschwald.
Actually I so far only saw two collections in vivo, both with dark brown exterior (mine and that by Gernot). The type description is unclear in the spore contents and also in the ascus base.
Zotto
Adam Polhorský,
27-10-2024 09:57
Re : Hyalopeziza on Rhamnus
Hello Enrique, Zotto,
Personally I would think this is a Cordieri. and belongs to the "Macroskyttea" sambuci group.
Adam
Hans-Otto Baral,
27-10-2024 10:36
Re : Hyalopeziza on Rhamnus
Interesting idea! But can it be that it is unrelated to H. alni, which stands about between Hyaloscypha and Olla in my analysis?
Enrique Rubio,
27-10-2024 12:56
Re : Hyalopeziza on Rhamnus
Thank you both: Zotto and Adam.
Is there any clear morphological difference between Hyalopeziza and Macroskyttea?
Is there any clear morphological difference between Hyalopeziza and Macroskyttea?
Adam Polhorský,
27-10-2024 14:37
Re : Hyalopeziza on Rhamnus
H. alni is IKI+ right? Then it is likely that its unrelated. I can't speak much on Hyalopeziza, it is surely polyphyletic genus. And what is the type, H. patula or H.ciliata?
The "Macroskyttea" sambuci is also not a true Macroskyttea. Enrique, if you would like, I can try sequencing this collection, as we are starting to have a decent number of data from this group and so far each substrate has its own species.
Hans-Otto Baral,
27-10-2024 22:00
Re : Hyalopeziza on Rhamnus
My folders are two H. alni: one with amyloid ring (typical) and one with inamyloid asci.
I remember the type is not fully clarified.