22-05-2026 13:29
Gernot FriebesHi,I am curious to hear your opinion on this mater
19-05-2026 10:27
Patrice TANCHAUDBonjour, récolte récente sur terre retournée i
04-06-2026 10:50
François Freléchoux
Bonjour, J'ai trouvé hier un petit asco observé
04-06-2026 07:02
François Freléchoux
Bonjour, Voici la description d'une espèce qui p
04-06-2026 13:34
Gernot FriebesHi,I am interested to hear your opinion on this Le
04-06-2026 11:36
Gernot FriebesHi,found on Vaccinium myrtillus.Asci: IKI –, 8-s
18-10-2022 00:12
Valencia Lopez Francisco JavierHola amigos/asRecientemente encontré esta colecci
Pseudophacidium ?necans on Vaccinium myrtillus
Gernot Friebes,
22-05-2026 13:29
I am curious to hear your opinion on this material collected on Vaccinium myrtillus. Morphologically, it seems to correspond to Pseudophacidium necans, but Vaccinium is usually the host for P. ledi.
However, my material deviates from P. ledi in the following characteristics, which all fit better for P. necans:
ascospores: 11-17 x 5.7-7.8 µm;
asci: in living state up to 180 µm, dead at least 130 µm;
inner cells of the cover layer: generally inflated, globose to pyriform (but often variable).
The last 3 photos show the presumed anamorph.
Best wishes,
Gernot
André LAURENT,
25-05-2026 13:40
Re : Pseudophacidium ?necans on Vaccinium myrtillus
Hello Gernot,
See the message of Stefan BLASER on 14/12/2013 and the comments of Zottobest regards
André LAURENT
See the message of Stefan BLASER on 14/12/2013 and the comments of Zottobest regards
André LAURENT
P.necans-0001.docx
Gernot Friebes,
04-06-2026 10:00
Re : Pseudophacidium ?necans on Vaccinium myrtillus
Hello, André!
Thank you for pointing out this thread. I did read it before I posted my collection. I am mostly wondering about the host because it seems unusual for P. necans.
In the meantime I collected another specimen on Ericaceae (Calluna vulgaris) which I attach here (the last photo shows conidia). Again, the shape of the ascospores differs significantly from a previous collection of mine on Rhododendron ferrugineum: http://ascofrance.com/search_recolte/4476. It seems to me that more than one Pseudophacidium species occurs on Ericaceae.
Best wishes,
Gernot
Thank you for pointing out this thread. I did read it before I posted my collection. I am mostly wondering about the host because it seems unusual for P. necans.
In the meantime I collected another specimen on Ericaceae (Calluna vulgaris) which I attach here (the last photo shows conidia). Again, the shape of the ascospores differs significantly from a previous collection of mine on Rhododendron ferrugineum: http://ascofrance.com/search_recolte/4476. It seems to me that more than one Pseudophacidium species occurs on Ericaceae.
Best wishes,
Gernot
Gernot Friebes,
04-06-2026 10:53
Re : Pseudophacidium ?necans on Vaccinium myrtillus
PS:
I think that the collection linked above on Rhododendron ferrugineum might correspond to Pseudophacidium rhododendri (= Propolis rhododendri) described by Rehm from the same host with partly bent ascospores:
https://www.biodiversitylibrary.org/page/474077#page/124/mode/1up
https://www.biodiversitylibrary.org/page/1076082#page/109/mode/1up
Whereas the collection on Calluna vulgaris might fit better for Pseudophacidium callunae (= Phacidium callunae) described by Karsten from the same host with ellipsoid to oblong-ellipsoid ascospores:
https://www.biodiversitylibrary.org/page/13414700#page/256/mode/1up
https://www.biodiversitylibrary.org/item/21913#page/271/mode/1up
This group would be a good candidate for a thorough revision...
Best wishes,
Gernot
I think that the collection linked above on Rhododendron ferrugineum might correspond to Pseudophacidium rhododendri (= Propolis rhododendri) described by Rehm from the same host with partly bent ascospores:
https://www.biodiversitylibrary.org/page/474077#page/124/mode/1up
https://www.biodiversitylibrary.org/page/1076082#page/109/mode/1up
Whereas the collection on Calluna vulgaris might fit better for Pseudophacidium callunae (= Phacidium callunae) described by Karsten from the same host with ellipsoid to oblong-ellipsoid ascospores:
https://www.biodiversitylibrary.org/page/13414700#page/256/mode/1up
https://www.biodiversitylibrary.org/item/21913#page/271/mode/1up
This group would be a good candidate for a thorough revision...
Best wishes,
Gernot
Hulda Caroline Holte,
04-06-2026 17:29
Re : Pseudophacidium ?necans on Vaccinium myrtillus
Hello, Gernot
I have recently made a collection on Calluna vulgaris which I initially labeled Pseudophacidium cf. ledi. However, this collection had differently shaped, broader spores and the cells in the marginal flaps differed from the description of P. ledi in Morphologie und Biologie von Pseudophacidium-Arten (Ascomycetes), M. C. Egger, 1968. This collection also had some paraphyses. It might have been infected with a hymenial parasite as some of the asci had aborted or deformed/discolored spores and some other asci were filled with conidia. I do know if this could have altered the shape of the “healthy” spores as well.
When I searched for other records of P. ledi to compare my specimen with I noted that photos of the marginal flaps often seemed to show somewhat different cell structure/sizes. This along with differing spore shapes in different collections could support your idea of there possibly being more than one species occurring on Ericaceae.
Here is some photos of my collection:
Best regards, Hulda
I have recently made a collection on Calluna vulgaris which I initially labeled Pseudophacidium cf. ledi. However, this collection had differently shaped, broader spores and the cells in the marginal flaps differed from the description of P. ledi in Morphologie und Biologie von Pseudophacidium-Arten (Ascomycetes), M. C. Egger, 1968. This collection also had some paraphyses. It might have been infected with a hymenial parasite as some of the asci had aborted or deformed/discolored spores and some other asci were filled with conidia. I do know if this could have altered the shape of the “healthy” spores as well.
When I searched for other records of P. ledi to compare my specimen with I noted that photos of the marginal flaps often seemed to show somewhat different cell structure/sizes. This along with differing spore shapes in different collections could support your idea of there possibly being more than one species occurring on Ericaceae.
Here is some photos of my collection:
Best regards, Hulda
