16-02-2026 11:53
Joeri Belisbetween leaf litter on twig in young salix growth.
14-02-2026 22:45
Tomaz Vucko
Hy!I would ask for some help determing this specie
13-02-2026 03:30
Tomaz Vucko
Hello! I found these immersed perithecia on a stic
14-02-2026 10:58
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
13-02-2026 18:05
Margot en Geert VullingsOn February 9, 2026, we found these small hairy di
02-02-2026 21:46
Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
15-02-2026 04:32
Tomaz Vucko
One more specimen that is giving me some descent a
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Anna KlosGoedemiddag, Op donderdag 5 februari vonden we ti
Fragosphaeria - Cephalotheca? on rotton wood Denmark
Karen Poulsen,
11-02-2024 16:28
Hi
Under thick bark on just felled 90-year-old, stunted Poplar tree - thoroughly rotten I found these small, sulphur-yellow, long-haired balls in flocks. Loosely seated. The peridium, which mostly consists of square cells, is in micro broken into sharp-edged pieces. Asci 8-spored, +/- globose, 7.5-10 µm diam. With spores, the asci wall is almost invisible (in water). Spores mostly pale yellow, oval. In some asci, one side of the spore is clearly concave. Spores approx. 3 x 2 µm. Could it be Fragosphaeria?
Kind Regards,
Karen
Michel RIMBAUD,
11-02-2024 18:40
Re : Fragosphaeria?
Bonjour Keren,
J'ai recherché par curiosité Lasiosphaeria sulphurella dans les différentes clés dont je dispose pour les Lasiospheria, et je ne l'ai trouvé dans aucune d'elles.
Je pense donc que mes clés ne sont pas au top.
Pouvez-vous me passer celle que ous utilisez, qui mentionne L.sulphurella ?
Merci d'avance.
michrimbaud@.com
J'ai recherché par curiosité Lasiosphaeria sulphurella dans les différentes clés dont je dispose pour les Lasiospheria, et je ne l'ai trouvé dans aucune d'elles.
Je pense donc que mes clés ne sont pas au top.
Pouvez-vous me passer celle que ous utilisez, qui mentionne L.sulphurella ?
Merci d'avance.
michrimbaud@.com
Karen Poulsen,
13-02-2024 11:09
Re : Fragosphaeria - Cephalotheca? on rotton wood Denmark
Hi Michel
Sorry, I haven't been able to find any key.
Karen
David Malloch,
13-02-2024 18:22
Re : Fragosphaeria - Cephalotheca? on rotton wood Denmark
This seems a good fit for Cephalotheca sulfurea. Very nice photos!
Karen Poulsen,
15-02-2024 12:06
Re : Fragosphaeria - Cephalotheca? on rotton wood Denmark
Thank you very much, David!
Karen Poulsen,
15-02-2024 23:17
Re : Fragosphaeria - Cephalotheca? on rotton wood Denmark
I have seen collection assumed to be Cephalotheca sulfurea with completely straight hairs and larger spores. Opposite this with spiral hairs. Can you possibly refer to key?
Kind regards,
Karen
David Malloch,
19-02-2024 15:57
Re : Fragosphaeria - Cephalotheca? on rotton wood Denmark
The type collection was studied by Chesters (TBMS 19:261-279. 1935) along with a culture made from fresh material. He stated that, "The whole perithecium is covered at this stage by a mass of interwoven, flexuose, thick-walled and sulphur-coloured hyphae.." He gave measurements from three collections at 4-6 x 2.5-4 µm, maybe slightly larger than yours, but such small objects are hard to measure precisely.
Yours seems to differ from Chester's material in having more spiralled and roughened hairs. Maybe it's another species. There is a culture from Chester's isolate at the Westerjijk Institute, so it would be possible to compare yours with that one using DNA.
The two pictures here are of C. sulfurea from Chester's paper. They are small and not very clear, but perhaps they could be useful.
Karen Poulsen,
19-02-2024 16:43
Re : Fragosphaeria - Cephalotheca? on rotton wood Denmark
Thank you very much for great help!
Karen P.