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Eutypa spec. (?)
Stefan Blaser,
20-03-2026 12:53
Hello everybody,
In the field, from distance, my first idea was Eutypa spinosa, but on closer inspection...
Any help would be very welcome!
Substrate:
Corticated, deciduous Wood, most likely Alnus (not sure)
Macro:
Stroma decorticating, colonizing areas of several cm2, Ostioles (papillae) emerging 0.2-0.3 mm above the stroma surface, ±semiglobose, delicately sulcate but not corkscrew-like. Perithecia 0.6-0.8 mm below surface, ellipsoid, ovoid compressed globose or globose, 0.3-0.5 x 0.25-0.5 mm in size. Stromatic tissue very hard/carbonaceous (as in E. spinosa) with weak black lines below.
Micro:
Spores brown, aseptate, smooth, cylindric to narrowly elliptic, slightly bent, but often nearly straight, 6.3 – 8.0 x 2.4-2.9 µm. Asci cylindric, with a long stalk, very delicate and hyaline, often disintegrating (overmature?), without visible blueing in either Melzer or IKI (to my judgment).
Many thanks and best wishes,
Stefan
Jacques Fournier,
20-03-2026 15:29
Re : Eutypa spec. (?)
Hi Gernot,
I'm not going to be very helpful because I don't know a Diatrypaceae with such a combination of features.
I agree with you it is likely an Eutypa, likely not a common one. Hope someone on the forum will be more inspired than me!
Cheers,
Jacques
I'm not going to be very helpful because I don't know a Diatrypaceae with such a combination of features.
I agree with you it is likely an Eutypa, likely not a common one. Hope someone on the forum will be more inspired than me!
Cheers,
Jacques
Michel Hairaud,
20-03-2026 21:29
Re : Eutypa spec. (?)
Hi Stefan, (and Jacques)
It may be a totally wrong suggestion :
On Carpinus dead trunks, at least in the Chizé forest, we regularly find Anthostoma decipiens with very similar characters . I attach a plate of a recent collection :
Amitiés
Michel
It may be a totally wrong suggestion :
On Carpinus dead trunks, at least in the Chizé forest, we regularly find Anthostoma decipiens with very similar characters . I attach a plate of a recent collection :
Amitiés
Michel
Jacques Fournier,
20-03-2026 21:48
Re : Eutypa spec. (?)
Hi both, I'm definitely in a bad day!
Sorry Stefan for calling you Gernot but it's not an offense because I equally value you both very much .
Thanks to Michel for reminding me A. decipiens that i rarely come across in my region where Carpinus is rare. It sucks getting old!
Hope tomorrow will be a better day, with my apologies.
Cheers,
Jacques
Sorry Stefan for calling you Gernot but it's not an offense because I equally value you both very much .
Thanks to Michel for reminding me A. decipiens that i rarely come across in my region where Carpinus is rare. It sucks getting old!
Hope tomorrow will be a better day, with my apologies.
Cheers,
Jacques
Stefan Blaser,
21-03-2026 07:21
Re : Eutypa spec. (?)
Hello Jacqes and Michel, Thanks a lot! Yes, Anthostoma decipiens seems to fit. Getting the correct substrate is always important... I need to check ascus reaction again. With inamyloid apical apparatus I didn't think about Xylariaceae. The species seems to be rather variable e.g. in terms of stroma extension and length of protruding necks.
Don't worry about the wrong name, Jacques ;-)