13-02-2026 03:30
Tomaz Vucko
Hello! I found these immersed perithecia on a stic
13-02-2026 18:05
Margot en Geert VullingsOn February 9, 2026, we found these small hairy di
12-02-2026 21:34
patrice CallardBonjour, la face inférieure des feuilles ce certa
11-02-2026 22:15
William Slosse
Today, February 11, 2026, we found the following R
12-02-2026 14:55
Thomas Læssøehttps://svampe.databasen.org/observations/10581810
11-02-2026 19:28
Lothar Krieglsteiner
on small deciduous twig on the ground in forest wi
25-04-2025 17:24
Stefan BlaserHi everybody, This collection was collected by JÃ
10-02-2026 17:42
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me donner
Hello everybody,unfortunately I have another strange pyrenomycete growing on dead attached Ulmus twigs, of which I do not know what it can be. I have seen similarities to Anisogramma, Mamiania and Apioporthe, but there is no species which fits with this one here:
The fruitbodies grow between the surface of the wood and the bark, they consist of a stroma with hairy surface which is somewhat flattened, and several perithecia inside. Macroscopically it reminds me on some Splanchnonema or even Pseudomassaria.
Sp 14-17x5-7µm, clearly apiosporous, hyalin, smooth, I have seen a rest of a hyaline sheath surrounding the spores. Asci with distinct apical apparatus (Congo), IKI-; Sp mostly uniseriate, sometimes partly biseriate.
Any idea?
regards,
björn
This reminds me of a species of Melanconis. Melanoconis chrysostroma has similar ascospores but grows on Carpinus spp. Does it produce conidia?
Dave
I haven't seen any conidia, and I do not believe that it is a Melanconis. I have compared the finding with several species of Melanconis, but it has very different features.
regards,
björn
Conidia are 8-9x2,4-3,2µm, aseptated, hyaline.
I have also attached a new cross section of a fb.
Hi Björn,
Seems to me too that Anisogramma may be reasonable, but no idea for a species... Nice finding
I think that your species is very  closed to Apiospora apiospora. But...
It's an american species growing on Ulmus and Wehmeyer gave : 11-14 x 2.5-5.5 µm, and Ellis & Everhart gave for the basionym Diaporthe apiospora : 11-15 x 6-10 µm.
Perhaps is it an european Apioporthe apiospora ?Â
Alain
I think Apioporthe apiospora comes closest. The description giving by Wehmeyer has similarities with my finding, except the spore size. But I think it is A. apiospora.
Perhaps there is another idea. I recently find another species on these Ulmus twigs: Eutypella stellulata.
Many thanks to all who have written here until now :)
regards,
björn
I agree with you. In Ellis & Ev. the width is like your one. But as I said, perhaps we can find some little differences between the two continents. Molecular study or culture perhaps would bring the answer to the question.
Eutypella stellulata is a common species in the Old Continent, ouf ! (ouf != ah ! = Ach !)Â
Alain
but E. stellulata is a new species for me, even if it seems to be common :P ouf ^^
Who is willing to have the Apioporthe for molecular studies?
if you want you can send your specimen to me, I will try to obtain molecular data
Christian
I have to thank Walter Jaklitsch, he has the idea of Melanconiella, which has aberrated spores due to the cold weather.
I am now also sure the substrate is not Ulmus, I have compared the twigs and there had been several from Carpinus, which we had collected per random. At least this was not a professional work, but we have gained a new very interesting species :)
regards,
björn