Orbicula parietina on straw - Forum ASCOFrance

07-06-2026 12:43

Mycoparasite of Pyrenomycete?

Steve Clements

Bojour. This was a strange find on a stick on my

07-06-2026 12:09

Lachnum sp. (nudipes) sur Filipendula

François Freléchoux

Bonjour, Voici une brève description de ce qui m

12-07-2015 00:05

Peziza paludicola or something else?

Nedim Jukic

This one from the same locality as the previous on

06-06-2026 17:44

Immature Hyaloscypha fuckelii?

Steve Clements

Bonjour, This disco was on planed wood 3 x 1.5 cm

14-08-2016 23:15

Tapesia from Rhododendron

Alex Akulov

Dear friendsCan you help me to find the descriptio

04-06-2026 23:53

Cistella sacconii

Stip Helleman

Dear all, someone can get acces to this article f

05-06-2026 11:02

Laterally compressed apothecia with blue pigments, bitunicate asci and 4-celled brown spores - Denmark

Thomas Læssøe

https://svampe.databasen.org/observations/10596691

04-06-2026 11:36

Tryblis-like on Vaccinium myrtillus

Gernot Friebes

Hi,found on Vaccinium myrtillus.Asci: IKI –, 8-s

05-06-2026 12:10

Capitotricha sp. sur Lonicea caerulea

François Freléchoux

Capitotricha sp. sur Lonicea caerulea Caractères

14-12-2014 18:31

¿Marcelleina?

Salvador Tello

Hola a todos. Tengo estos hongos que cogí ayer q

Orbicula parietina on straw

William de Jong, 04-04-2021 19:35

Hi, a few days ago I found this fungi on a bunch of straw which had gotten wet. Attached to the substrate with a hyfal structure. Fruiting bodies up to 1.3 mm. The outer layer is relatively hard, it became dented due to drying (but it was smooth initially). The inside is yellowish containing round spores and, I think, crystals? The round spores seem to have a thick wall, which is ornamented with bumps. Spore size on average 10 µm (8,5-10,8 µm).
Does any of you have an idea what this might be?
Thanks in advance, William

Norbert Heine, 04-04-2021 21:01

Re : Fungi on straw

Hello, William, this should be Orbicula parietina.

Sincerely, Norbert

William de Jong, 05-04-2021 17:36

Re : Orbicula parietina on straw

Thank you very much Norbert!

I did some follow-up research and it fits the description of Orbicula parietina very well.
I think the peridium is two-layered, see pictures of exoperidium and endoperidium. The hyphal hairs seem to be constricted to the peridial base. Together with the spore size (8,9-10,3 x 9,3-10,9 µm) this should exclude Lasiobolidium orbiculoides.

Do you still agree with Orbicula parietina? A confirmation would be nice. :)