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04-08-2020 22:32

Edouard Evangelisti Edouard Evangelisti

Bonjour le forum, J'ai trouvé dernièrement une

04-08-2020 22:24

Matthias Mann Matthias Mann

Liebe Asco-Freunde, cher Asco-ami, Auf morschem,

04-08-2020 15:52

Hardware Tony Hardware Tony

Found a small group of inoperculate cup ascos unde

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Juuso Äikäs

I came by a shrub of some kind in a park-like envi

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Elisabeth Stöckli

Bonsoir, Sur tiges mortes d'Equisetum arvense tro

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Valencia Lopez Francisco Javier

Hola a todosEncontré este curioso ascomycete a me

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de ayer en bosque de abetos y hayas,   recolecta

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Eutypa species perhaps?
Hardware Tony, 27-06-2020 13:21
Hardware TonyI wondered if anyone could help me with this ascomycete, looking very much like Eutypa but all known lit references do not get close to the spore size or macro appearance. 

Found on dead Prunus twig in litter in a supermarket car park!, details are:
Spores 12 - 14.83µm x 2.25, 2-guttulate, Allantoid thick walled, slightly verruculose. Asci large extended 50 -65µm, with centrally stacked seriate spores, no colour change. Paraphyses translucent and guttulate, if that is what they are, Bck stroma 0.3mm high with sometimes large horizontal browning topped slits with apparent closed aperatures on the side, Fruit bodies not embedded.  Ignore white strands seen occasionally, left over from tissue while wetting - still learning!  Nearest I could get to:  E. scabrosa.

Many thanks  Tony Hardware
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Paul Cannon, 03-07-2020 11:15
Re : Eutypa species perhaps?
This is another group of fungi that it is wise to ignore unless you get desperate...

Species delimitation is poorly understood, and the genera are mostly not real either. Rappaz's world monograph (1987) recogizes a large number of species, but many of them are separated by rather minor characters and the group has not been sufficiently tested using molecular methods.

Your specimen is problematic as it occurs on narrow twigs, so the stroma characteristics may not have developed fully. Most likely this is a species of Eutypella, perhaps E. leprosa which has been reported from Prunus. However, best to record it as Eutypella sp. unless someone else knows better.
Hardware Tony, 04-07-2020 14:32
Hardware Tony
Re : Eutypa species perhaps?
Hi Paul,
Many thanks for this advice and best way forward.  I'll certainly take this into account in future. 

Maybe this applies to other genera such as Anthostomella as recently found on Miscanthus sinensis (Chinese Silvergrass) in the back garden! but all species in Ellis and elsewhere do not match the spore size and type. 

Best regards   Tony
Paul Cannon, 04-07-2020 15:25
Re : Eutypa species perhaps?
No, Anthostomella species are usually manageable, though it's a possibility that yours could have been introduced as an endophyte with the plant. Not sure whether it should really be accessible on Ascofrance, but the link below is the most useful start for the genus...

Good luck...