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27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

25-03-2024 20:21

DAVID MARCOS DAVID MARCOS

Bonjour, je m'appelle David et je débute dans l'i

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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
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