17-09-2025 19:43
Philippe PELLICIERSur branche morte de Mélèze. Les ascospores sphÃ
17-09-2025 10:50
Heather MerryleesHi there!I am hoping for any advice on the identif
11-09-2025 16:57
Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
16-09-2025 12:53
Philippe PELLICIERPézizes de 1-4 mm, brun grisâtres, sur les capsu
03-09-2025 12:44
Enrique Rubio
Hi to somebody.I would like to know your opinion o
15-09-2025 14:40
Nicolas VAN VOOREN
Hello.I'm searching for a digital copy of the seco
14-09-2025 22:16
Philippe PELLICIERApothécies petites jusquà 3 mm, oranges, avec de
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
What is this pyrenomycete causing white lesions in hardwood bark?
Ethan Crenson,
05-05-2021 22:25
Hello all,
In a New York City cemetery last weekend I found a small hardwood branch with the bark beginning to fall away. In the bark are stout black pyrenomycetes in clusters, which seem to be causing white lesions in the bark and wood beneath. The pyrenomycetes can be quite large (by pyrenomycete standards). In the images of the 3 sectioned perithecia, the large one is 1mm wide by 1.5mm tall. It is 2mm tall when measuring from the base to the tip of the neck.
Asci: 153-168 x 7.5-10µm. The spore bearing part 105-125µm. IKI+, the apical plug about 2.5 tall x 3µm wide when mature; much longer in immature asci.
Spores: 13-14 x 6-7µm, brown, ellipsoid to inequalateral ellipsoid, guttulate, usually with one large guttule at the center, with a very inconspicuous germ slit less than spore length.
Can anyone help me put a name on this?
Thanks in advance.
Ethan
