05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o
04-07-2025 20:12
Josep Torres
Hello.A fungus growing on the surface of a trunk o
20-06-2025 08:33
Josep Torres
Hello.Small, blackish, mucronated surface grains s
28-06-2025 16:00
Josep Torres
Hello.A tiny fungus shaped like globose black grai
04-07-2025 12:43
Castillo Joseba
me mandan el material seco de Galicia (España)
03-07-2025 18:40
Castillo Joseba
me mandas el material seco de Galicia (España) re
03-07-2025 20:08
Francois Guay
I found this interesting yellowish asco growing on
01-07-2025 23:37
Josep Torres
Hello.A Pleosporal symbiotic organism located and
02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
Hi,I would appreciate very much confirmation or correction of this determination. I am confused with quite inconsistent information found in literature; for example regarding substratum (Betula only?), size of ostioles (from 'very small, barely visible' to '6-sulcate, large, conspicuous'). So, I am not sure in it.
Thanks for your time for responding.
Amadej
Spores: Me = 7.4 x 1.8 microns; Qe = 4,2
Asci: many-spored
Stromata: 2-5.5 mm in 'diameter', ostioles of mature stromata small, barely visible
Substratum: Corylus avellana, dead, rotten, still standing, still in bark branch
Place: Trenta valley, Julian Alps, elev. 615 m
Habitat: light mixed wood, bushes, at the edge of a pasture; average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C
No pigments visible in 5% KOH dissolute.
Difficult genus because a modern taxonomic study is lacking. The only key to the European Diatrypella species I am aware of, is included in the following paper:
Vasilyeva, L. & C. Scheuer (1996) Neuere Aufsammlungen stromatischer Pyrenomyceten aus Österreich, insbesondere der Steiermark. Mitt. Naturwiss. Ver. Steiermark 126: 61-82.
(download: http://www.zobodat.at/pdf/MittNatVerSt_126_0061-0082.pdf).
These authors follow a narrow species concept in which D. favacea occurs on Betula. On the contrary, Croxall 1950 (Studies on British Pyrenomycetes. III. The British species of the genus Diatrypella CESATI & DE NOTARIS. - Trans. Brit. Mycol. Soc. 33(1/2): 45-72) considers D. favacea, D. angulata and D. verruciformis as one species (D. favacea). More papers see https://www.verspreidingsatlas.nl/0593010 (under the tab "artikelen').
Eduard
Many thanks for your comment and the interesting links. They helped me a lot to get a better understanding of the situation in present taxonomy of this genus. So, I believe this find corresponds best (based on telemorph traits only) to either (old stile) Diatrypella favacea or Diatrypella verruciformis (according to sources, which tie D. favacea exclusively to Betula). However, this name is (still?) not recognized by IF.
Thanks a lot again.
Amadej