Uni- or bitunicate? On Ulmus glabra bark.

26-07-2020 21:59

Edvin Johannesen

This one was growing on bark of an elm tree in Wes

23-07-2020 17:21

Sphaeriale

Enrique Rubio

Hi to everybodyThis pyrenomicete grew in very rott

25-07-2020 13:46

Ayuda con una ¿Calycina?

Josep Torres

Hola.Pequeños apotecios fotografiados sobre un pe

24-07-2020 10:44

Scutellinia with almost hyaline hairs

Gernot Friebes

Hi,found on soil with hairs variable in size, up t

25-07-2020 18:40

yellow discomycete on herbaceous stem

Lothar Krieglsteiner

.. in the Alps (exact findplace can be asked), mon

25-07-2020 18:24

small discomycete on Cystopteris fragilis

Lothar Krieglsteiner

... in the Alps (exact findplace can be asked), mo

25-07-2020 19:08

yellow-greenish discomycete on wood

Lothar Krieglsteiner

.. in the Alps, montaneous region, on deciduous wo

25-07-2020 16:29

Calosphaeria-like

Bernard Declercq

Hi,... and this is another sordariomycete for whic

25-07-2020 16:19

Nectria-like

Bernard Declercq

Hi,Has anyone an idea about this old Nectria-like

25-07-2020 10:33

Mollisia retincola vs Trichobelonium kneiffii

Koszka Attila

Dear forum! What is the correct name for this spe

Uni- or bitunicate? On Ulmus glabra bark.

Edvin Johannesen, 26-07-2020 21:59

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.