18-07-2025 23:03
Josep Torres
Hello.Fruitings between 51 and 130 microns in tota
16-07-2025 17:34
Bernard Declercq
Hello,I have trouble distinguishing above mention
14-07-2025 11:20
Michel Hairaud
Bonjour, Voici une espèce de (?) Hyaloscyphace
16-01-2023 21:31
Riet van Oosten
Hello, Nearby the find of Calycina claroflava on
14-07-2025 17:55
Yanick BOULANGERBonjourAutre dossier laissé en suspendJe viens de
14-07-2025 11:17
Yanick BOULANGERBonjourJ'ai un dossier Jackrogersella qui est rest
14-07-2025 15:52
Gernot FriebesHi,I wanted to share this collection on Rubus idae
14-07-2025 13:37
Gernot FriebesHi,do you think this collection could be R. ulmari
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.