13-02-2025 17:40
Blasco Rafael
Hola, he recogido esta muestra sobre madera de Ret
15-02-2025 12:21
Lennert GeesHello!I've found this species on birddung, but I s
15-02-2025 15:16
Jorian Eijkelboom
On 6 february 2025 i stumbled upon a leafspot on a
14-02-2025 18:31
Francois Guay
Here’s an interesting unidentified ascomycete I
14-02-2025 00:22
Jorian Eijkelboom
On 6 february 2025 i stumbled upon a leafspot on P
14-02-2025 16:00
Lothar Krieglsteiner
during a workshop on corticiaceous fungi this was
13-02-2025 07:41
Vasileios Kaounas
first time I encounter it. I didn't expect to see
14-02-2025 12:57
Gernot FriebesHello,we are looking for ideas regarding this pyre
13-02-2025 22:39
Yanick BOULANGERBonsoirPetits périthèces noirs d'environ 0.5 mm
Niesslia-like Perithecia on Well Rotted Alnus Trunk
Peter Thompson,
13-05-2018 12:43
I have found some tiny, spherical perithecia with short hairs growing on decorticated and well decayed wood from a trunk of Alnus glutinosa.
The hairs are thick walled, dark brown, with bulbous bases and rounded tips. They strongly resemble the rigid hairs of species of Niesslia, typically measuring 82.5 - 92.5 x 5.25 um.
The spores are 8- 11-septate, filled with tiny drops in all cells and typically measuring 56 - 65 x 8 - 8.5 um. Hyaline and tapering to rounded ends. there are 8 spores per ascus. The ascus tips show no reaction to lugol.
I have attached a photo of the fruit bodies and a micro photo of the hairs, asci and spores.
I wonder if anyone has an idea as to what they might be?
Thank You,
With Best Wishes,
Peter.
Gernot Friebes,
13-05-2018 12:51
Re : Niesslia-like Perithecia on Well Rotted Alnus Trunk
Hi, Peter,
the ascomata and ascospores remind me of Acanthostigma – it might be worth looking into that direction.
Best wishes,
Gernot
the ascomata and ascospores remind me of Acanthostigma – it might be worth looking into that direction.
Best wishes,
Gernot
Peter Thompson,
13-05-2018 18:36
Re : Niesslia-like Perithecia on Well Rotted Alnus Trunk
Hello Gernot,
Thank you for your reply.
Acanthostigma is an unfamiliar genus for me, so I have had a look into the options for host type and macro / micro characteristics and I now believe that my sample is A. minutum.
Thank you for your help.
With Best Wishes,
Peter.
Thank you for your reply.
Acanthostigma is an unfamiliar genus for me, so I have had a look into the options for host type and macro / micro characteristics and I now believe that my sample is A. minutum.
Thank you for your help.
With Best Wishes,
Peter.