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05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

04-07-2025 20:12

Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

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Bryostroma trichostomi
Georges Greiff, 20-06-2018 15:55
Unknown ascomycete on the moss Trichostomum crispulum found twice in South England. Hopefully somebody on here will have some ideas on the ID. Here it is stained in I. Struggled to find spores in the past but managed to find some in today's asci. Sample from January 2018.

Perithecia black, up to 1mm wide. A random ascus measured 115 x 23 but some seemed distorted. Asci 8-spored, I+ inner compartment, tip differentiated. Ascospores 26.00-32.76 x 7.5-9.1, smooth-walled, 1(2?)-septate, large guttules present. Paraphyses richly branched, filamentous, 1 wide.

Thanks,

EDIT: happy with the suggested ID of Bryostroma trichostomi.
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Pascal RIBOLLET, 22-06-2018 11:19
Re : Unknown Bryoparasitic Fungus
Hello,
Could be a Bryostroma (see Döbbeler, Mitteilungen aus der Botanischen Staatssammlung München 14: 184 (1978). The host fits B. trichostomi...but your spores seem too small (Döbbeler : 40-55 x 7-9 µm), unless they're note fully mature.
Bryostroma axillare have smaller spores but different hosts (Barbula, Ditrichum)...

Good luck !
Pascal
Georges Greiff, 22-06-2018 17:34
Re : Unknown Bryoparasitic Fungus
Hi Pascal,

I think you are absolutely correct with Bryostroma trichostomi so thank you very much. My initial examination of fruits in Jan showed only immature asci with no spores in them - they probably began to develop whilst the specimen was in storage but still no spores were liberated so I could only measure from some of the more developed asci (most were still not mature as you can see in the 400X picture). I will keep an eye out for this in the field in the spring to try to get more mature specimens.

Thanks again.

George