Once again I came across an Orbilia and I would like to ask for help in identifying it

Place of discovery: Unbarked deciduous wood branch lying in the swamp in the dry inlet to the Loher Weiher pond on the Loher Tal loop (deciduous forest beech/oak plus floodplain woodland)
MTB: 5014,132 Date of discovery: 21/09/2024

Almost hyaline, yellow-isabellar-coloured fruiting body of approx. 800µm Ø, hymenium covered with a thin film;

Paraphyses cylindrical, mostly apically capitate; small, yellow-coloured globules visible in the basal area of the uppermost segment of the paraphyses; mostly
two septa in the basal area and there partly simply branched

Asci clavate, 8-spored, apically round or truncate, basally thinly elongated or h-shaped

Spores long-spindled, hyaline with barely recognisable, roundish spore body in the second third of the spores and some very small oil drops
5.9 [7.4 ; 8] 9.5 × 0.9 [1.2 ; 1.4] 1.7 µm
Q = 3.9 [5.6 ; 6.4] 8.1 ; N = 31 ; C = 95%
Me = 7.7 × 1.3 µm ; Qe = 6

In my identification attempt I ended up with Orbilia cotoneastri, but I am not convinced that this is correct.

I would be glad if someone could help me with the correct name of my find.

Best regards

Harald

Hans-Otto Baral, 08-10-2024 17:46

Re : Orbilia cotoneastri?

From the habitat I would consider O. luteorubella and O. rosea.

Regrettably your preparation shows only dead asci and spores. The spore body would be helpful, it should be very elongated, acute above, not globose as in O. cotoneastri.

Harald Homa, 08-10-2024 18:09

Re : Orbilia cotoneastri?

It surprises me that the cells are dead, since I had prepared in water with addition of SDS.
At the moment I don't have the find or the microscope within reach, but I will contact you next week with new images that hopefully will help to clarify.

Thank you for the information and help

Best regards

Harald

Hans-Otto Baral, 09-10-2024 10:26

Re : Orbilia cotoneastri?

SDS could be poisonous, I never tested.

Try pure water.