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13-01-2026 08:49

Danny Newman Danny Newman

Coccomyces sp. on fallen Rhododendron leavesPretty

13-01-2026 08:43

Danny Newman Danny Newman

Tricladium varicosporioides on indet. decorticate

12-01-2026 22:02

Ethan Crenson

Hello all, I am hoping someone will have some ins

13-01-2026 07:57

Danny Newman Danny Newman

cf. Bombardia on indet. decorticate woodAppalachia

13-01-2026 07:51

Danny Newman Danny Newman

Atrocalyx sp. on indet. herbaceous stemAppalachian

13-01-2026 07:28

Danny Newman Danny Newman

Chlorociboria glauca on indet. decorticate logThe

13-01-2026 07:14

Danny Newman Danny Newman

Neodasyscypha cerina on indet decorticate logThe S

11-01-2026 20:35

Josep Torres Josep Torres

Hello.A very tiny pyrenomycete sprouting sparsely

12-01-2026 05:24

Danny Newman Danny Newman

Cyathicula coronata on Urtica dioicaCataloochee Di

15-12-2025 11:49

Danny Newman Danny Newman

ITS sequences from the following two collections B

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Hysterioid on Pinus bark
Juuso Äikäs, 14-03-2022 14:02
Yesterday I found some hysterioid fungi growing on bark of a dead, standing Pinus sylvestris tree.

The fruitbodies aren't in the best condition and must've developed last season. But there were spores to be found and some asci as well.

The spores have one septum and measure 27.8 - 32.7 × 8.8 - 9.5 µm. 

Actidium baccarinii is the best match I found, but it's spores shouldn't be nearly as big as these are. Maybe the large size is because of germination? Or is there some other alternative?
  • message #72070
  • message #72070
  • message #72070
Adam Polhorský, 14-03-2022 17:08
Re : Hysterioid on Pinus bark
Hi Juuso, I dont have a name for you but I think it is the same as http://ascofrance.com/search_forum/65795 and http://ascofrance.com/search_forum/41100
Björn Nordén, 14-03-2022 17:41
Re : Hysterioid on Pinus bark
Please check Poetschia buellioides
Juuso Äikäs, 14-03-2022 18:59
Re : Hysterioid on Pinus bark
Thanks a lot for the answers and links! 

That seems to be the right direction -- so this actually belongs to Patellariaceae.

I found a description of Poetschia buellioides (A reassessment of the genera referred to the family Patellariaceae (Ascomycota)), but it mentioned that that one grows on deciduous wood; although there appear to be sightings of it in GBIF from Pinus. Otherwise it seems to fit pretty well.
Björn Nordén, 14-03-2022 19:15
Re : Hysterioid on Pinus bark
Yes, it is common on Pinus bark.

Best regards

Björn
Juuso Äikäs, 14-03-2022 20:18
Re : Hysterioid on Pinus bark
Ok, good to know! This species and even the genus seems to be missing from the Finnish species list. Probably once again one of these common but rarely-if-ever reported cases.
Björn Nordén, 14-03-2022 20:57
Re : Hysterioid on Pinus bark
I have made a key to hysterioids in Fennoscandia in case you are interested.
Best
Juuso Äikäs, 14-03-2022 21:07
Re : Hysterioid on Pinus bark
Ah yes! I actually downloaded that last week from researchgate:

https://www.researchgate.net/publication/351561550_Key_to_hysterioid_fungi_on_bark_and_wood_in_Scandinavia

A very nice key. Somehow I just managed to miss this one...