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Thomas Læssøehttps://svampe.databasen.org/observations/10534623
Unknown unitunikate pyrenomycete
Björn Wergen,
25-03-2012 19:03
Hiyesterday I have found a completely immersed pyreno on dead, still attached twigs of Prunus sp (not P. avium and not P. spinosa). I first thought about a Massaria, because it has very big black perithecia (0,5-0,9mm) with an inconspicuous ostiolus.
But micro studies had shown brown didymospores with smooth surface, 19-23x8-9µm. I think that the 8spored Asci are unitunicate.
After watching these features I directly thought about Amphisphaeria millepunctata, but this species has smaller spores.
Spores remember me on Valsaria insitiva or Didymosphaeria species...but they all do not pass to the macroscopical appearance.
Do you have an idea?
amitiés,
björn
Björn Wergen,
28-03-2012 11:28
Re : Unknown unitunikate pyrenomycete
Can Amphisphaeria umbrina be a possible solution? BARR (1994): "Amphisphaeria has been the repository for many extraneous taxa having one-septate, brown ascospores, and species have been confused with species of Didymosphaeria." (Mycotaxon 51, p. 196).
Well there should be a name for this fungus...
Well there should be a name for this fungus...
Martin Bemmann,
28-03-2012 20:36
Re : Unknown unitunikate pyrenomycete
Hi Björn,
given that your fungus is an Amphisphaeria there are only few taxa J- according to the key provided in Wang et al 2004 (attached). The only taxon corresponding to the size of the spores would be A. vibratilis (also attached). Did you observe a gel sheath? I could believe in one studying your micro.
Herzliche Grüße
Martin
given that your fungus is an Amphisphaeria there are only few taxa J- according to the key provided in Wang et al 2004 (attached). The only taxon corresponding to the size of the spores would be A. vibratilis (also attached). Did you observe a gel sheath? I could believe in one studying your micro.
Herzliche Grüße
Martin
Wang et al. 2004 Amphispharia key
Wang et al. 2004 Amphispharia vibratilis
Björn Wergen,
28-03-2012 21:34
Re : Unknown unitunikate pyrenomycete
Hi Martin,
I could not detect a sheath around the spores, and they also were not verrucose. Only problem could be that there were not many spores, so I think it was immature. However, I will give him the name "A. vibratilis" and will look for further studies.
Thanks for help
lg björn
I could not detect a sheath around the spores, and they also were not verrucose. Only problem could be that there were not many spores, so I think it was immature. However, I will give him the name "A. vibratilis" and will look for further studies.
Thanks for help
lg björn
Martin Bemmann,
28-03-2012 22:16
Re : Unknown unitunikate pyrenomycete
Hi Björn,
I dont think these spores look that less verrucose then those depicted in Wang (the pictures in the book are not much better than my scan). I marked with red arrows the areas where I suspect some sheaths.
Grüße
Martin
I dont think these spores look that less verrucose then those depicted in Wang (the pictures in the book are not much better than my scan). I marked with red arrows the areas where I suspect some sheaths.
Grüße
Martin
Björn Wergen,
28-03-2012 22:46
Re : Unknown unitunikate pyrenomycete
Hm ok. Do you have the whol article from Wang? Seems to be interesting. If not, does not matter.
I do not want to make so much trouble here :D
regards,
björn
I do not want to make so much trouble here :D
regards,
björn