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27-04-2026 20:52

Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

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Uni- or bitunicate? On Ulmus glabra bark.
Edvin Johannesen, 26-07-2020 21:59
Edvin Johannesen
This one was growing on bark of an elm tree in Western Norway. The brown 1-septate spores measure 16-22 x 11-12 microns. Asci very long, ranging from 120-250 microns (7-10 thick). Apically thickened up to 5 microns. Ascus apparatus ring-shaped, staining blue in Lugol after KOH pre-treatment and water rinsing. I think I see a very faint striation on the spores, but impossible to photograph. Are we in Pleosporales or perhaps Amphisphaeriales? Asci too long and slim to be bi-tunicate? Can Pleosporales (e.g. Didymosphaeria) have IKI+ asci? Any suggestions?

Thanks.
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Edvin Johannesen, 26-07-2020 22:00
Edvin Johannesen
Re : Uni- or bitunicate? On Ulmus glabra bark.
Some more photos.
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Edvin Johannesen, 27-07-2020 15:48
Edvin Johannesen
Re : Uni- or bitunicate? On Ulmus glabra bark.
Turns out to be Amphisphaeria umbrina.  Thanks to Björn Nordén.