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Hello.A tiny ascomycete found embedded in wood in
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On Pteridium
Enrique Rubio,
25-04-2020 18:46
Hi to everyoneI would like to know your opinion about these completely superficial and ostiolate perithecia covered by a clypeoid structure that grew isolated on Pteridium aquilinum rachis. The gregarious hemispheric or broadly conical ascomata measure 150-200 microns in diameter, the asci have a sharply cut base and a small Melzer negative apical apparatus and contain eight hyaline, narrowly ellipsoid, mostly 3 septate ascospores. The paraphyses are abundant, some of them capitulate.
With these data I pressume that it could be a fungus in the order Diaporthales, but I do not get any concrete results.
Any help would be welcome
Many thanks again.
Paul Cannon,
26-04-2020 16:13
Re : On Pteridium
Hello Enrique
I think you have a species of Porina. Using a key to British species it seems close to P. aenea which is usually a bark-inhabiting species, but it would not surprise me particularly to find it growing on other substrata; it's been reported on Rubus stems, for example. The lichen thallus is reduced here, but the orange patches on your macro image look as if they are Trentepohlia which is the right alga for European species. There are lots of tropical species on leaves.
Best wishes
Paul
Enrique Rubio,
26-04-2020 17:36
Re : On Pteridium
Dear Paul
I've seen your pictures in Fungi and Lichens of Great Britain and Ireland and I see that they match very well with my collection. I find it very difficult to know many times if a fungus is lichenized.
Many thanks again for your kindly help.
Best wishes
Enrique
I've seen your pictures in Fungi and Lichens of Great Britain and Ireland and I see that they match very well with my collection. I find it very difficult to know many times if a fungus is lichenized.
Many thanks again for your kindly help.
Best wishes
Enrique
Alain GARDIENNET,
27-04-2020 21:17
Re : On Pteridium
Hi Enrique,
I completely agree with Paul. Porina genus was my first idea. Concerning P. aena, I found it on Ruscus, Buxus, Ligustrum, Rubus, Lonicera. Why not on Pteridium. I'm not so surprised.
Alain
Enrique Rubio,
27-04-2020 21:31
Re : On Pteridium
Thank you for your contribution, Alain