On 5 August 2022, a friend gave me a piece of a branch of Ulmus (13 cm long, 2.5 cm in diameter) covered with an anamorph. Under those white/pink spots, the bark was covered with green algae and lichens.
The conidia with 1 sept (slightly off-centre and slightly contracted there) have the following dimensions: 20.3 - 24.5 × 10.6 - 12.7 µm; Q = 1.8 - 2.2 ; Me = 22.5 × 11.6 µm .

When wiping off those downy spots I found white bumps in the bark, under which were black perithecia with 1 ostiole that contained very dark spores with following dimensions:
43 - 55.5 × 18.6 - 22.6 µm; Q = 2 - 2.7; Me = 50 × 20.9 µm.

Due to the age of the branch, the prevailing dryness and heat, the material to be examined was in poor condition. With the key of ME Barr Mycotaxon Vol XV 1982 I could identify the ascomata as: Splanchnonema foedans.

My question is twofold: 1) Can someone confirm my determination?
2) Is the anamorph related to S. foedans and can it be identified?

Many thanks in advance,

François Bartholomeeusen

Bernard Declercq, 11-08-2022 20:03

Re : Anamorph on Ulmus twig related to Splanchnonema foedans???

Hi François,

This is Splanchnonema foedans indeed, most probably a new species for Flanders.
The anamorph is Arthobotrys-like.

All the best,
Bernard